InkCollector.AutoRedraw Property
Gets or sets a value that specifies whether the InkCollector object repaints the ink when the window is invalidated.
Namespace: Microsoft.Ink
Assembly: Microsoft.Ink (in Microsoft.Ink.dll)
Syntax
'Declaration
Public Property AutoRedraw As Boolean
'Usage
Dim instance As InkCollector
Dim value As Boolean
value = instance.AutoRedraw
instance.AutoRedraw = value
public bool AutoRedraw { get; set; }
public:
property bool AutoRedraw {
bool get ();
void set (bool value);
}
public function get AutoRedraw () : boolean
public function set AutoRedraw (value : boolean)
Property Value
Type: System.Boolean
true if the InkCollector object repaints the ink when the window is invalidated; otherwise, false.
Remarks
The value for AutoRedraw specifies whether or not the Ink object currently associated with InkCollector object is automatically redrawn when the window associated with the InkCollector object receives a Paint notification. For example, if AutoRedraw is set to true, the ink is automatically redrawn when you minimize the window and then restore it. If set to false, when you minimize the window and restore it, the ink disappears from view.
When AutoRedraw is false, the ink appears while inking unless the DynamicRendering property is false.
When your application is performing custom rendering or when your application is sensitive to painting issues, you can handle the repainting yourself and set the AutoRedraw property to false for the InkPicture control. In that case add a delegate to the underlying control's OnPaint event handler to draw the ink yourself or handle the underlying control's Invalidate event to modify the InvalidateEventArgs object.
Examples
This example displays strokes in an InkCollector object by setting the AutoRedraw property to false, then manually drawing the ink. The Paint event handler for the control to which the InkCollector is attached checks the size of each stroke. If the stroke is smaller than 400 ink space units, the stroke appears blue.
Private Sub mInkObjectControl_Paint(ByVal sender As Object, ByVal e As PaintEventArgs)
' Check if AutoRedraw is off
' mInkObject can be InkCollector, InkOverlay, or InkPicture
If Not mInkObject.AutoRedraw Then
' Draw each stroke manually
For Each stroke As Stroke In mInkObject.Ink.Strokes
' See if this stroke is small
Dim strokeBounds As Rectangle = stroke.GetBoundingBox()
If strokeBounds.Width < 400 And strokeBounds.Height < 400 Then
' Change the drawing color to blue
Dim newAttributes As DrawingAttributes = stroke.DrawingAttributes.Clone()
newAttributes.Color = Color.Blue
' Draw with these special drawing attributes
mInkObject.Renderer.Draw(e.Graphics, stroke, newAttributes)
Else
' Draw stroke with its own drawing attributes
mInkObject.Renderer.Draw(e.Graphics, stroke)
End If
Next
End If
End Sub
private void mInkObjectControl_Paint(object sender, PaintEventArgs e)
{
// Check if AutoRedraw is off
// mInkObject can be InkCollector, InkOverlay, or InkPicture
if (!mInkObject.AutoRedraw)
{
// Draw each stroke manually
foreach (Stroke stroke in mInkObject.Ink.Strokes)
{
// See if this stroke is small
Rectangle strokeBounds = stroke.GetBoundingBox();
if (strokeBounds.Width < 400 && strokeBounds.Height < 400)
{
// Change the drawing color to blue
DrawingAttributes newAttributes = stroke.DrawingAttributes.Clone();
newAttributes.Color = Color.Blue;
// Draw with these special drawing attributes
mInkObject.Renderer.Draw(e.Graphics, stroke, newAttributes);
}
else
{
// Draw stroke with its own drawing attributes
mInkObject.Renderer.Draw(e.Graphics, stroke);
}
}
}
}
Platforms
Windows 7, Windows Vista, Windows Server 2008 R2, Windows Server 2008
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information
.NET Framework
Supported in: 3.0