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InkCanvas.SelectionChanging Event

 

Occurs when a new set of ink strokes and/or elements is being selected.

Namespace:   System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

public event InkCanvasSelectionChangingEventHandler SelectionChanging

The SelectionChanging event is raised when strokes and/or elements are selected by the user - but before the change is applied.

The SelectionChanging event is processed when the InkCanvasSelectionChangingEventHandler receives an InkCanvasSelectionChangingEventArgs object. InkCanvasSelectionChangingEventArgs provides methods for accessing FrameworkElement and StrokeCollection objects after they are selected by the user.

After the change is applied, the SelectionChanged event is raised.

System_CAPS_noteNote

The SelectionChanging event does not occur when the selected strokes are deleted or when the ActiveEditingMode property changes.

The following example makes selected strokes royal blue.

void inkCanvas1_SelectionChanging(object sender, InkCanvasSelectionChangingEventArgs e)
{
    StrokeCollection selectedStrokes = e.GetSelectedStrokes();

    foreach (Stroke aStroke in inkCanvas1.Strokes)
    {
        if (selectedStrokes.Contains(aStroke))
        {
            aStroke.DrawingAttributes.Color = Colors.RoyalBlue;
        }
        else
        {
            aStroke.DrawingAttributes.Color = inkCanvas1.DefaultDrawingAttributes.Color;
        }

    }
}

.NET Framework
Available since 3.0
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