/// <summary>
/// Deletes a Stroke from our internal data structures - the Sketch and FeatureSketch
/// </summary>
/// Precondition: The InkStroke is in the InkCanvas's collection of strokes.
/// Postcondition: The InkStroke has been removed to the Sketch's list of
/// Strokes, Substrokes, and FeatureSketch.
/// <param name="inkStroke"></param>
public void DeleteStroke(System.Windows.Ink.Stroke inkStroke)
{
// Update mappings
Substroke substroke = substrokeIdMap[ink2sketchStr[(String)inkStroke.GetPropertyData(idGuid)]];
ink2sketchStr.Remove((String)inkStroke.GetPropertyData(idGuid));
sketchStr2ink.Remove(substroke.Id);
substrokeIdMap.Remove(substroke.Id);
// Remove it from the relevant data structures (InkCanvas last)
mFeatureSketch.RemoveSubstroke(substroke);
mInkCanvas.Strokes.Remove(inkStroke);
}
/// <summary>
/// Deletes an error label when its corresponding strokes are erased.
/// </summary>
private void InkPicture_StrokesDeleting(object sender, InkCanvasStrokeErasingEventArgs e)
{
System.Windows.Ink.Stroke iStroke = e.Stroke;
if (iStroke2Label == null)
{
return;
}
if (iStroke2Label.ContainsKey((String)iStroke.GetPropertyData(idGuid)))
{
System.Windows.Controls.Label label = iStroke2Label[(String)iStroke.GetPropertyData(idGuid)];
label.Visibility = System.Windows.Visibility.Visible;
sketchPanel.InkCanvas.Children.Remove(label);
errorLabels.Remove(label);
sketchPanel.InkCanvas.InvalidateArrange();
}
}
/// <summary>
/// Returns a the sketch substroke corresponding to the given
/// Ink stroke. Returns null if no corresponding
/// Sketch stroke exists.
/// </summary>
/// <param name="id">The Ink stroke</param>
/// <returns>The corresponding Sketch substroke</returns>
public Substroke GetSketchSubstrokeByInk(System.Windows.Ink.Stroke stroke)
{
String id = (String)stroke.GetPropertyData(idGuid);
return(GetSketchSubstrokeByInkId(id));
}