ITransformProvider.Resize Method (Double, Double)


Resizes the control.

Namespace:   System.Windows.Automation.Provider
Assembly:  UIAutomationProvider (in UIAutomationProvider.dll)

Sub Resize (
	width As Double,
	height As Double


Type: System.Double

The new width of the window, in pixels.

Type: System.Double

The new height of the window, in pixels.

Exception Condition

If the CanResize property is false.

When called on a control that supports split panes, this method can have the side effect of resizing other contiguous panes.

An object cannot be moved, resized, or rotated such that its resulting screen location would be completely outside the coordinates of its container and inaccessible to keyboard or mouse. For example, when a top-level window is moved completely off-screen or a child object is moved outside the boundaries of the container's viewport. In these cases the object is placed as close to the requested screen coordinates as possible with the top or left coordinates overridden to be within the container boundaries.

The following example shows one possible implementation of this method for a custom control that can be resized.

''' <summary>
''' Resizes the provider to the specified height and width.
''' </summary>
''' <param name="height">The specified height.</param>
''' <param name="width">The specified width.</param>
Private Sub Resize(ByVal width As Double, ByVal height As Double) Implements ITransformProvider.Resize
	If Not(CType(Me, ITransformProvider)).CanResize Then
		Throw New InvalidOperationException("Operation cannot be performed.")
	End If

	If width <= 0 Or height <= 0 Then
		Throw New InvalidOperationException("Operation cannot be performed.")
	End If

          Dim widthInt As Integer = CInt(width)
          Dim heightInt As Integer = CInt(height)

	' Resize should never be allowed to place a control outside the 
	' bounds of its container; the control should always be accessible 
	' using the keyboard or mouse.
	' Use the bounds of the parent window to limit the placement 
	' of the custom control.
	Dim MaxSize As New Size(Me.customControl.formWidth - 20, Me.customControl.formHeight - 20)
	Dim MinSize As New Size(10, 10)

	If widthInt > MaxSize.Width Then
		widthInt = MaxSize.Width
	End If
	If heightInt > MaxSize.Height Then
		heightInt = MaxSize.Height
	End If
	If widthInt < MinSize.Width Then
		widthInt = MinSize.Width
	End If
	If heightInt < MinSize.Height Then
		heightInt = MinSize.Height
	End If

	' Invoke control method on separate thread to avoid clashing with UI.
          ' Use anonymous method for simplicity.
	Me.customControl.Invoke(New MethodInvoker(Sub() Me.customControl.Size = New Size(widthInt, heightInt)))
End Sub

.NET Framework
Available since 3.0
Available since 2.0
Windows Phone Silverlight
Available since 7.0
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