//Prevent DrawAttributes object be replaced in InkCanvas
private void inkCanvas_DefaultDrawingAttributesReplaced(object sender, DrawingAttributesReplacedEventArgs e)
{
var inkCanvas = ((InkCanvas)sender);
inkCanvas.DefaultDrawingAttributesReplaced -= inkCanvas_DefaultDrawingAttributesReplaced;
inkCanvas.DefaultDrawingAttributes = _sharedDrawingAttributes;
inkCanvas.DefaultDrawingAttributesReplaced += inkCanvas_DefaultDrawingAttributesReplaced;
}
private void OnDrawingAttributesReplaced(Object sender, DrawingAttributesReplacedEventArgs args)
{
// If the drawing attributes change involves Width, Height, StylusTipTransform, IgnorePressure, or FitToCurve,
// we need to invalidate
if (false == DrawingAttributes.GeometricallyEqual(args.NewDrawingAttributes, args.PreviousDrawingAttributes))
{
Invalidate();
}
}
protected virtual void OnDefaultDrawingAttributesReplaced(object sender, DrawingAttributesReplacedEventArgs e)
{
DrawingAttributesReplacedEventHandler handler = DefaultDrawingAttributesReplaced;
if (handler != null)
{
handler(this, e);
}
}
// <Snippet16>
protected override void OnDrawingAttributesReplaced(DrawingAttributesReplacedEventArgs e)
{
//// Notify base class of event
//base.OnDrawingAttributesReplaced(e);
//if (e.NewDrawingAttributes.Color == Colors.Red)
//{
// MessageBox.Show("The stroke is now red!");
//}
}
//<Snippet17>
void inkCanvas1_DefaultDrawingAttributesReplaced(object sender, DrawingAttributesReplacedEventArgs e)
{
if (e.NewDrawingAttributes.IsHighlighter)
{
this.Title = "Now using a highlighter.";
}
else
{
this.Title = "Now using a pen.";
}
}
void myNewStroke_DrawingAttributesReplaced(object sender, DrawingAttributesReplacedEventArgs e)
{
}
private void DefaultDrawingAttributesReplaced(object sender, DrawingAttributesReplacedEventArgs e)
{
Trace.WriteLine("InkCanvas default drawing attributes replaced.");
}
protected override void OnDrawingAttributesReplaced(DrawingAttributesReplacedEventArgs e)
{
base.OnDrawingAttributesReplaced(e);
InitPen();
}
protected override void OnDefaultDrawingAttributesReplaced(DrawingAttributesReplacedEventArgs e)
{
base.OnDefaultDrawingAttributesReplaced(e);
}
protected override void OnDefaultDrawingAttributesReplaced(DrawingAttributesReplacedEventArgs e)
{
CreateBrush();
e.NewDrawingAttributes.AttributeChanged += DefaultDrawingAttributes_AttributeChanged;
e.PreviousDrawingAttributes.AttributeChanged -= DefaultDrawingAttributes_AttributeChanged;
}
