---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
` is set to `False`.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.AllowAutoDeactivate
**AllowAutoDeactivate** As `Boolean`
Determines whether the control should be deactivated (on macOS) when the parent window is deactivated. The default is `True`.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.AllowLiveScrolling
**AllowLiveScrolling** As `Boolean`
If `True`, a ValueChanged event occurs as the user drags the thumbnail in the Slider.
Otherwise, a single ValueChanged event occurs when the user stops dragging the thumbnail.
On Linux (GTK3), the Slider always does live scrolling regardless of this setting.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.AllowTabStop
**AllowTabStop** As `Boolean`
If `True`, the **RectControl** is in the Tab Order and accepts the focus when the user tabs into it. The default is `True`. If `False`, the user cannot tab into it to give it the focus. However, the **RectControl** can gain the focus by other means, such as the user's clicking on it or by setting the focus in code.
This example removes the control from the Tab Order:
``` xojo
Me.AllowTabStop = False
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Enabled
**Enabled** As `Boolean`
Determines if the control should be enabled when the owning window is opened.
A disabled control cannot be clicked and cannot receive the focus.
This example disables the control. Its caption is grayed out.
``` xojo
Me.Enabled = False
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Handle
**Handle** As `Integer`
Returns a handle to the control.
This property is read-only.
For interfacing with Mac APIs using `` Declare`s, RectControl.Handle returns NSViews (except for :doc:`Toolbar ``).
On Windows returns the HWND of the control.
On Linux it returns a GtkWidget.
The following gets a handle to the control.
``` xojo
Var i As Integer = Me.Handle
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Height
**Height** As `Integer`
The height (in points) of the control.
This example sets the height of the control to 100:
``` xojo
Me.Height = 100
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Index
**Index** As `Integer`
If the control is used in a control set, this specifies the control's index in the set.
This property is read-only.
The *control set* is often used to manage a group of RadioButtons since a single RadioButton in a window doesn't make much sense. Most typically, you create an instance of the RadioButton, assign 0 to its Index property, and then duplicate it. This increments the value of Index for each new instance but retain the original control's name.
To determine which RadioButton the user clicked, use the Action event handler of the control set. The parameter *Index* contains the value of Index for the RadioButton that was clicked. The event handler is this:
``` xojo
Sub Action(Index As Integer)
Label1.Text = "You chose radio button " + index.ToString + "."
End Sub
```
To set a RadioButton in a control set, you use its *Index* property to refer to the RadioButton whose value you want to set. For example, the following line selects the second RadioButton from code:
``` xojo
RadioButton1(1).Value = True ' 0-based
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Left
**Left** As `Integer`
The left side of the control in local coordinates (relative to the window).
The following example moves the control 100 points from the left side of the window:
``` xojo
Me.Left = 150
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.LineStep
**LineStep** As `Integer`
On Windows and Linux, LineStep is the amount a Slider moves when the Slider has the focus and the user uses the arrow keys. On macOS it has no effect.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.LockBottom
**LockBottom** As `Boolean`
Determines whether the bottom edge of the control should stay at a set distance from the bottom edge of the parent control, if there is one, or the owning window.
This property can be set in the control's Inspector. The following example sets it in code.
``` xojo
Me.LockBottom = True
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.LockLeft
**LockLeft** As `Boolean`
Determines whether the left edge of the control should stay at a set distance from the left edge of the parent control, if there is one, or the owning window.
Beginning with version 2009r5, LockLeft and Locktop default to `True` when you add a new control to a window. Existing controls will be altered only if LockRight and/or LockBottom are not set. *LockLeft* has no effect unless *LockRight* is `True`.
This property can be set in the control's Inspector. The following example sets it in code.
``` xojo
Me.LockLeft = True
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.LockRight
**LockRight** As `Boolean`
Determines whether the right edge of the control should stay at a set distance from the right edge of the parent control, if there is one, or the owning window.
This property can be set in the control's Inspector. The following example sets it in code.
``` xojo
Me.LockRight = True
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.LockTop
**LockTop** As `Boolean`
Determines whether the top edge of the control should stay at a set distance from the top edge of the parent control, if there is one, or the owning window.
Beginning with version 2009r5, LockTop and LockLeft default to `True` when you add a control to a window. Existing controls will be altered only if LockRight and/or LockBottom are not set. *LockTop* has no effect unless *LockBottom* is `True`.
This property can be set in the control's Inspector. The following example sets it in code.
``` xojo
Me.LockTop = True
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MaximumValue
**MaximumValue** As `Integer`
The maximum value of the Slider. The default is 100.
This example is in the Initialized event of the control. It sets the minimum and maximum values of the Slider.
``` xojo
Me.MaximumValue = 50
Me.MinimumValue = 10
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MinimumValue
**MinimumValue** As `Integer`
The minimum value of the Slider. The default is 0.
This example is in the Initialized event of the control. It sets the minimum and maximum values of the Slider.
``` xojo
Me.MaximumValue = 50
Me.MinimumValue = 10
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseCursor
**MouseCursor** As `MouseCursor`
The cursor to be displayed while the mouse is within the control and both the `DesktopApplication` and `Window` class's MouseCursor properties are `Nil`.
If the `DesktopApplication` class's MouseCursor property is not `Nil` or the `Window`'s MouseCursor property is not `Nil`, then any control's MouseCursor property is ignored. You can use a cursor stored in the `Cursors` module. On Macintosh, you can also obtain a `MouseCursor` from a resource file.
This line in the Open event of the control sets the default cursor to the finger pointer.
``` xojo
Me.MouseCursor = System.Cursors.FingerPointer
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseX
**MouseX** As `Integer`
The X coordinate of the mouse (points). Measured from the top-left corner of the control.
This property is read-only.
This code is in the MouseDown event of a `TextField` and displays the X-coordinate at the point of the MouseDown event.
``` xojo
Me.Value = Str(Me.MouseX)
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseY
**MouseY** As `Integer`
The Y coordinate of the mouse (points). Measured from the top-left corner of the control.
This property is read-only.
This code is in the MouseDown event of a `TextField` and displays the Y-coordinate at the point of the MouseDown event.
``` xojo
Me.Value = Str(Me.MouseY)
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Name
**Name** As `String`
The name of the control. Set the name of the control in the Inspector.
This property is read-only.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.PageStep
**PageStep** As `Integer`
The amount the value changes when the user clicks in the Slider track.
This example is in the Open event of the control. It sets the Maximum value and the PageStep.
``` xojo
Me.Maximum = 500
Me.PageStep = 20
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.PanelIndex
**PanelIndex** As `Integer`
If the control has been placed on a `TabPanel` or `PagePanel` control, this is the panel (page/tab) that the control is on. If the control is not on a panel, it returns -1.
The first panel is numbered zero. If the control has been placed on a panel of a `TabPanel` or `PagePanel` control, it returns the panel number. If the control is not on a `PagePanel` or `TabPanel`, it returns -1. If you change the PanelIndex to a nonexistent panel, the control will disappear until you give it a PanelIndex value that corresponds to a panel that exists.
If you are looking to change the currently selected panel (page/tab), use `PagePanel`.
This code displays the panel index of the control that is on the page.
``` xojo
Label3.Value = Str(Me.PanelIndex)
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Parent
**Parent** As `Control`
Used to get and set the control's parent control or window.
Returns `Nil` if the parent is the window. Assign `Nil` to make the control's parent the window, even if it is enclosed by another control. The child control's behavior in the IDE will reflect the parent's state. If the parent control is somehow in another window, an `InvalidParentException` will occur.
The following example sets the parent of the control to the window.
``` xojo
Me.Parent = Nil
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Scope
**Scope** As `Integer`
Used to determine whether access to the control is Public (0) or Private (2). The default is Public.
This property is read-only.
If the Scope of a control is set to Private, it cannot be accessed from outside its parent window.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.TabIndex
**TabIndex** As `Integer`
The **RectControl's** position in the Tab Order. It is 0-based. A TabIndex of 0 is the first **RectControl** to get the focus.
On the Mac you need Full Keyboard Access turned on in System Preferences (Keyboard-\>Shortcuts) in order to manually set focus to non-text controls.
This example sets the control's TabIndex.
``` xojo
Me.TabIndex = 2
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.TickMarkStyle
**TickMarkStyle** As
Adds tick marks to the Slider.
Use `TickMarkStyles` to set this property.
If the value is None, then there are no tick marks. Setting TickMarkStyle to TopLeft places tick marks above a horizontal Slider or to the left of a vertical Slider. Setting TickMarkStyle to BottomRight places tick marks below or to the right of the Slider.
This example is in the Initialized event of the control. It sets the TickMarkStyle to Bottom Right.
``` xojo
Me.TickMarkStyle = Slider.TickMarkStyles.BottomRight
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Tooltip
**Tooltip** As `String`
Text of help message displayed as a Windows or Linux "tooltip" or macOS help tag.
The tip/tag is displayed when the user hovers the mouse cursor over the control.
This example adds a tooltip to a `BevelButton` that has an icon.
``` xojo
Me.CaptionAlignment = 0 ' left
Me.CaptionDelta = 10
Me.Tooltip = "Click to bark."
Me.Icon = Woof ' added to the project
Me.CaptionPosition = 2
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Top
**Top** As `Integer`
The top of the control in local coordinates (relative to the window).
This example sets the top of the control to 140 points from the top of the window:
``` xojo
Me.Top = 140
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Transparent
**Transparent** As `Boolean`
Determines whether the control is transparent on Windows. The default is `False`. Has no effect on macOS or Linux.
Transparent controls draw more slowly and use more memory in order to cache the background. Unless you absolutely require transparency, leave this set to False.
For projects that were created prior to 2018r1, this property defaults to True to emulate previous behavior. Consider changing it to False to improve performance if you do not require transparency.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.TrueWindow
**TrueWindow** As `Window`
Returns a reference to the actual enclosing `Window`.
This property is read-only.
TrueWindow walks up the window hierarchy and finds the actual enclosing window regardless of how deeply nested the `RectControl` or `DesktopContainer` hierarchy is.
`Window` also has a TrueWindow property.
This example accesses the TrueWindow and displays its Title property in a `TextField`.
``` xojo
TextField1.Text = Me.TrueWindow.Title
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Value
**Value** As `Integer`
The current value of the Slider.
This example sets the maximum and current values of the Slider.
``` xojo
Me.Maximum = 50
Me.Value = 10
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Visible
**Visible** As `Boolean`
Determines whether the control is visible when its owning window is opened. The default is `True`: the control is visible.
The following code in the DisclosureTriangle Action event handler displays or hides a ListBox on the window:
``` xojo
ListBox1.Value = Me.Visible
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Width
**Width** As `Integer`
The width (in points) of the control.
The following example resizes the control:
``` xojo
Me.Width = 200
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Window
**Window** As `Window`
The control's parent window.
This property is read-only.
This code gets the parent window's Title property.
``` xojo
TextField1.Text = Me.Window.Title
```
## Method descriptions
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.AcceptFileDrop
**AcceptFileDrop**(FileType As `String`)
Permits documents of type *FileType* to be dropped on the control. *FileType* must be a file type that you defined in via the `FileType` class or the File Type Sets Editor.
This code in the Open event of an `ImageWell` makes it possible for the user to drop either a picture or a file that is a jpeg image. The File Type Sets editor was used to define the “image/jpeg” file type. It is one of the “Common File Types” that is available in the editor.
``` xojo
Me.AcceptPictureDrop
Me.AcceptFileDrop("image/jpeg")
```
To restrict file drops to just folders (and not files), you can put this code in the `DragEnter` event:
``` xojo
If Not obj.FolderItem.IsFolder Then Return True
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.AcceptPictureDrop
**AcceptPictureDrop**
Permits pictures to be dropped on the control.
If a control should accept pictures in a drag and drop, then AcceptPictureDrop needs to be called prior to the drop. Typically, it is in the Open event of the control itself. For example, the line:
``` xojo
Me.AcceptPictureDrop
```
in the Open event of the control that will receive the dragged pictures is needed. When the picture is dropped, the `DropObject` event is called and this is where you will put your code to handle the drop.
Canvas.Open:
``` xojo
Me.AcceptPictureDrop
```
Canvas.DropObject:
``` xojo
If obj.PictureAvailable Then
Me.Backdrop = obj.Picture
End If
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.AcceptRawDataDrop
**AcceptRawDataDrop**(Type As `String`)
Permits data (of the Type specified) to be dropped on the control.
The following specfies a generic file type defined in the File Type Sets editor.
``` xojo
Me.AcceptRawDataDrop("????")
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.AcceptTextDrop
**AcceptTextDrop**
Permits text to be dropped on the control.
This line in the Open event of a control that can accept dragged text.
``` xojo
Me.AcceptTextDrop
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Close
**Close**
Closes a control.
Closing a control permanently removes the control from memory, making it impossible to access. You can close both non-indexed controls and indexed controls. When you close an indexed control, the indexes for the remaining controls will shift downward so that the indexes start with zero and are consecutive.
The following code closes the control. When this is executed from a visible control, the control disappears from the window.
``` xojo
Me.Close
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.DrawInto
**DrawInto**(g As `Graphics`, x As `Integer`, y As `Integer`)
Draws the contents of the RectControl into the specified `Graphics` context. The parameters *x* and *y* are the coordinates of the top, left corner.
This method does not work with `HTMLViewer` and `OpenGLSurface`.
This example draws the current control into the Graphics of a Picture and then displays it as the Backdrop of a Canvas:
``` xojo
Var p As New Picture(Me.Width, Me.Height)
Me.DrawInto(p.Graphics, 0, 0)
Canvas1.Backdrop = p
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Invalidate
**Invalidate**(\[EraseBackground As `Boolean`\])
Similar to RefreshRect, but causes the specified region of the RectControl to be marked dirty and to be redrawn when the window contents need to be redrawn. The region to be redrawn is specified by the *X*, *Y*, *Width*, and *Height* parameters. This form of Invalidate was formerly called InvalidateRect.
The following code refreshes the control. EraseBackground defaults to `True`.
``` xojo
Me.Invalidate(False)
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Refresh
**Refresh**(eraseBackground As `Boolean`)
Repaints the portion specified of the contents of the control immediately.
Calling this frequently can cause the code executing to slow down. It is often preferable to call `RectControl` instead.
Refresh the entire area:
``` xojo
Me.Refresh(False)
```
Refresh a portion of the area:
``` xojo
Me.Refresh(100, 150, 200, 300)
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.SetFocus
**SetFocus**
If applicable, sets the focus to the RectControl. KeyDown events are directed to the control.
If the control cannot get the focus on the platform on which the application is running, SetFocus does nothing. The SetFocus method of the `Window` class or the `ClearFocus` method can be used to remove the focus from the control that currently has the focus, leaving no control with the focus.
On the Mac you need Full Keyboard Access turned on in System Preferences (Keyboard-\>Shortcuts) in order to manually set focus to non-text controls.
The following example sets the focus to TextField1. If another control has the focus when this line is executed, then the user sees that TextField1 gets the focus.
``` xojo
TextField1.SetFocus
```
## Event descriptions
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Close
**Close**
The control is about to close.
forsearch
Slider.ConstructContextualMenu
**ConstructContextualMenu**(Base As `MenuItem`, x As `Integer`, y As `Integer`) As `Boolean`
This event is called when it is appropriate to display a contextual menu for the control.
This event handler is the recommended way to handle contextual menus because this event figures out whether the user has requested the contextual menu, regardless of how they did it. Depending on platform, it might be in the MouseUp or MouseDown event and it might be a right+click or by pressing the contextual menu key on the keyboard, for example.
*Base* is analogous to the menu bar for the contextual menu. Any items you add to *Base* will be shown as menu items. If you return `False`, the event is passed up the parent hierarchy.
If you return `True`, the contextual menu is displayed. The parameters *x* and *y* are the mouse locations. If the event was fired because of a non-mouse event, then *x* and *y* are both set to -1. See the example of a contextual menu in the following section.
The following ConstructContextualMenu event handler builds a menu with three menu items plus a submenu with three additional menu items.
``` xojo
' Add some items
base.AddMenu(New MenuItem("Test 1"))
base.AddMenu(New MenuItem("Test 2"))
base.AddMenu(New MenuItem("Test 3"))
' Add a Separator
base.AddMenu(New MenuItem(MenuItem.TextSeparator))
' Add a sub menu
Var submenu As New MenuItem("SubMenu")
submenu.AddMenu(New MenuItem("SubMenu Test 1"))
submenu.AddMenu(New MenuItem("SubMenu Test 2"))
submenu.AddMenu(New MenuItem("SubMenu Test 3"))
base.AddMenu(submenu)
' Add a Separator
base.AddMenu(New MenuItem(MenuItem.TextSeparator))
Return True
```
forsearch
Slider.ContextualMenuAction
**ContextualMenuAction**(HitItem As `MenuItem`) As `Boolean`
Fires when a contextual menuitem *hitItem* was selected but the Action event and the MenuHandler for the menuitem did not handle the menu selection.
This event gives you a chance to handle the menu selection by inspecting the menuitem's Text or Tag properties to see which item was selected. Use this in conjunction with ConstructContextualMenu if you have not specified the Action event or the Menu Handler for the items on the contextual menu. See the example of a contextual menu in the examples for the **RectControl** class.
`Return` `True` if this event has handled the item the user chose from the contextual menu. Returning `False` will cause the control's parent to execute its ContextualMenuAction event. This can be handy if you have the same contextual menu for several controls who share the same `Parent` (several on the same window for example). By returning `False` you can handle them all in a single event.
This simple event handler displays the value of the selected menu item.
``` xojo
If hitItem <> Nil Then MessageBox(hitItem.Value)
Return True
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.DragEnter
**DragEnter**(obj As `DragItem`, Action As `Integer`) As `Boolean`
Fires when the passed `DragItem` enters the RectControl.
Returns a `Boolean`. Return `True` from this event to prevent the drop from occurring.
The Action parameter specifies the drag action. It can take the following class constants of the `DragItem` class:
| Value | Class Constant |
|-------|--------------------------------------------------------------------|
| 0 | `DragItem`.DragActionDefault |
| 1 | `DragItem`.DragActionCopy |
| 2 | `DragItem`.DragActionMove |
| 3 | `DragItem`.DragActionLink |
To restrict file drops to just folders (and not files), you can put this code in the DragEnter event:
``` xojo
If Not obj.FolderItem.IsFolder Then Return True
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.DragExit
**DragExit**(obj As `DragItem`, Action As `Integer`)
Fires when the passed `DragItem` exits the RectControl.
The *Obj* parameter is the item being dragged. The *Action* parameter specifies the drag action. It can take the following class constants of the `DragItem` class:
| Value | Constant |
|-------|--------------------------------------------------------------------|
| 0 | `DragItem`.DragActionDefault |
| 1 | `DragItem`.DragActionCopy |
| 2 | `DragItem`.DragActionMove |
| 3 | `DragItem`.DragActionLink |
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.DragOver
**DragOver**(x As `Integer`, y As `Integer`, obj As `DragItem`, Action As `Integer`) As `Boolean`
Fires when the `DragItem` is over the RectControl.
The *Obj* parameter is the object being dragged. The coordinates x and y are relative to the **RectControl**. Returns a `Boolean`. Return `True` from this event to prevent the drop from occurring.
The *Action* parameter specifies the drag action, which is typically done by holding down a modifier key (Shift, Alt, Option, Command, etc.) while doing the drag. It can take the following class constants of the `DragItem` class:
| Value | Constant |
|-------|--------------------------------------------------------------------|
| 0 | `DragItem`.DragActionDefault |
| 1 | `DragItem`.DragActionCopy |
| 2 | `DragItem`.DragActionMove |
| 3 | `DragItem`.DragActionLink |
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.DropObject
**DropObject**(Obj As `DragItem` Action As `Integer`)
The item represented by *Obj* has been dropped on the control.
The *Obj* parameter is the object being dragged. The *Action* parameter specifies the drag action. It can take the following class constants of the `DragItem` class:
{\| class="genericTable" ! width=10% Class Constant 0 \| `DragItem`.DragActionDefault 1 \| `DragItem`.DragActionCopy 2 \| `DragItem`.DragActionMove 3 \| `DragItem`.DragActionLink }
The following DropObject event handler can handle either a dropped picture or a dropped file. The type of file that it can handle needs to have been specified in a call to AcceptFileDrop prior to the drop, for example, in the Open event.
``` xojo
If Obj.PictureAvailable Then
Me.Image = obj.Picture
ElseIf Obj.FolderItemAvailable Then
Me.Image = Picture.Open(obj.FolderItem)
End If
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.GotFocus
**GotFocus**
The Slider has received the focus and has a selection rectangle around it.
Note
On Macintosh, controls other than text fields and lists will accept focus only if the full keyboard access option is enabled in System Preferences/Keyboard.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.KeyDown
**KeyDown**(Key As `String`) As `Boolean`
The user has pressed the *Key* passed while the `control` has the focus.
How KeyDown works depends on the type of control.
**TextField and TextArea** Returning `True` means the key is intercepted, preventing the key from actually reaching the control at all. This would be useful if you want to override the behavior of the tab key for example. Returning `False` means the key reaches the control.
**All Other Controls** Returning `True` prevents the KeyDown event on the parent control (usually the window) from executing. Returning `False` results in the execution of the KeyDown event of the parent control.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.KeyUp
**KeyUp**(Key As `String`)
Fires when the passed *Key* is released in the RectControl that has the focus.
It is not guaranteed to be the same key that received the KeyDown event.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.LostFocus
**LostFocus**
The Slider has lost the focus.
Note
On Macintosh, controls other than text fields and lists will accept and lose focus only if the full keyboard access option is enabled in System Preferences/Keyboard.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseDown
**MouseDown**(x As `Integer`, y As `Integer`) As `Boolean`
The mouse button was pressed inside the control's region at the location passed in to *x*, *y*.
The coordinates *x* and *y* are local to the control, i.e. they represent the position of the mouse click relative to the upper-left corner or the Slider.
`Return` `True` if you are going to handle the MouseDown. In such a case:
- The Action event, if any, will not execute and the state of the object will not change.
- You will receive the `MouseDrag` and `MouseUp` events.
If you return False, the system handles the MouseDown so the `MouseDrag` and `MouseUp` event handlers do not get called.
The MouseDown event uses the `DragItem` constructor when the user drags the contents of the control. It is:
``` xojo
Var d As DragItem
d = New DragItem(Self, Me.Left, Me.Top, Me.Width, Me.Height)
d.Picture = Me.Image
d.Drag ' Allow the drag
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseDrag
**MouseDrag**(x As `Integer`, y As `Integer`)
This event fires continuously after the mouse button was pressed inside the Slider. Mouse location is local to the control passed in to *x*, *y*.
Note
This event will not occur unless you return `True` in the `MouseDown
` event first.
The parameters *x* and *y* are local coordinates, i.e. they represent the position of the mouse relative to the upper-left corner of the Slider.
As this event is fired continuously (hundreds of time per second), it is your responsibility to determine if the mouse has really moved.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseEnter
**MouseEnter**
The mouse has entered the area of the control.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseExit
**MouseExit**
The mouse has left the area of the control.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseMove
**MouseMove**(X As `Integer`, Y As `Integer`)
The mouse has moved within the control to the coordinates passed. The coordinates are local to the control, not to the window.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseUp
**MouseUp**(x As `Integer`, y As `Integer`)
The mouse button was released. Use the *x* and *y* parameters to determine if the mouse button was released within the control's boundaries.
Note
This event will not occur unless you return `True` in the MouseDown event. The return value is ignored.
The parameters *x* and *y* are local coordinates, i.e. they represent the position of the mouse click relative to the upper-left corner or the Slider. Mouse clicks that are released to the left or above a control are negative.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.MouseWheel
**MouseWheel**(X As `Integer`, Y As `Integer`, DeltaX As `Integer`, DeltaY As `Integer`) As `Boolean`
The mouse wheel has been moved.
The parameters *X* and *Y* are the mouse coordinates relative to the control that has received the event. The parameters *DeltaX* and *DeltaY* hold the number of scroll lines the wheel has been moved horizontally and vertically, as defined by the operating system. *DeltaX* is positive when the user scrolls right and negative when scrolling to the left. *DeltaY* is positive when the user scrolls down and negative when scrolling up.
Returns a `Boolean`. Return `True` to prevent the event from propagating further.
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.Open
**Open**
The control is about to be displayed. Use this event to initialize a control.
The Open event is called after the Constructor.
Be warned that initializing control property values using the Constructor instead of the Open event may result in those property values being overwritten by what is set in the Inspector. For best results, use the Open event for control initialization rather than the control Constructor.
If the control is supposed to handle drag and drop, you need to tell it which type of item it needs to be able to handle. The following example informs the control that pictures and files can be dropped on it. The type of the file it needs to support is specified via the File Types Editor.
``` xojo
Sub Open()
Me.AcceptPictureDrop
Me.AcceptFileDrop("JPEG")
End Sub
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
forsearch
Slider.ValueChanged
**ValueChanged**
The Slider's value has changed.
## Notes
Sliders default to a height of 23 pixels so they use the normal size on all platforms.
On macOS Sierra (10.12) and later, vertical sliders no longer appear automatically when the height is greater than the width. To enable a vertical Slider, put this code in the `Open` event handler for the \`Slider\`:
``` xojo
Declare Sub setVertical Lib "Cocoa" Selector "setVertical:" (windowRef As Integer, id As Boolean)
setVertical(Me.Handle, True)
```
## Sample code
Changing the maximum value of a Slider at runtime:
``` xojo
Slider1.MaximumValue = 200
```
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Setting the text of TextField1 to the value of the Slider when the user scrolls.
``` xojo
Sub ValueChanged()
TextField1.Text = Str(Slider1.Value)
End Sub
```
## Compatibility
All project types on all supported operating systems.
## See also
`RectControl` parent class; `RectControl` class; `Scrollbar` control; `TickMarkStyles` enum.