/// <summary>
/// Get the cached bounding boxes to be updated.
/// </summary>
private Rect GetStrokesBounds()
{
// Update the strokes bounds if they are changed.
if (_areStrokesChanged)
{
_cachedStrokesBounds = SelectedStrokes.Count != 0 ?
SelectedStrokes.GetBounds( ) : Rect.Empty;
_areStrokesChanged = false;
}
return(_cachedStrokesBounds);
}
/// <summary>
/// Our own internal listener for strokes changed.
/// This is used so that if someone deletes or modifies a stroke
/// we are currently displaying for selection, we can update our size
/// </summary>
private void OnStrokeCollectionChanged(object target, StrokeCollectionChangedEventArgs e)
{
// If the strokes only get added to the InkCanvas, we don't have to update our internal selected strokes.
if (e.Added.Count != 0 && e.Removed.Count == 0)
{
return;
}
foreach (Stroke s in e.Removed)
{
if (SelectedStrokes.Contains(s))
{
s.Invalidated -= new EventHandler(this.OnStrokeInvalidated);
s.IsSelected = false;
// Now remove the stroke from our private collection.
SelectedStrokes.Remove(s);
}
}
// Mark the strokes change
_areStrokesChanged = true;
UpdateSelectionAdorner();
}
public void HandlePreviewMouseDown(Point mousePos)
{
this.isDragging = true;
Rect selectionZone = this.Canvas.GetSelectionBounds();
if (selectionZone.Size != Size.Empty)
{
selectionZone.Inflate(new Size(15, 15)); //To cover the resizing bounds
}
//if (this.OutilSelectionne == "lasso" && this.StrokeBeingDragged == null)
if (this.OutilSelectionne == "lasso" && this.StrokeBeingRotated == null && this.StrokeBeingDragged == null)
{
foreach (Stroke s in SelectedStrokes.Where(x => (x as Form).Type != "Arrow"))
{
Point pts = (s as Form).RotatePoint;
if (Math.Abs(Point.Subtract(pts, mousePos).Length) < 10 && this.StrokeBeingRotated == null)
{
this.Canvas.MoveEnabled = false;
this.StrokeBeingRotated = s;
this.isDragging = false;
//this.Canvas.EditingMode = InkCanvasEditingMode.None;
}
}
}
if (this.OutilSelectionne == "lasso" && this.StrokeBeingDragged == null && this.StrokeBeingRotated == null)
{
foreach (Stroke s in SelectedStrokes.Where(x => (x as Form).Type == "Arrow"))
{
for (int i = 0; i < s.StylusPoints.Count; i++)
{
Point pts = s.StylusPoints[i].ToPoint();
if (Math.Abs(Point.Subtract(pts, mousePos).Length) < 10 && this.IndexBeingDragged == -1)
{
this.StrokeBeingDragged = s;
this.IndexBeingDragged = i;
this.isDragging = false;
editeur.ShowEncrage = true;
//this.Canvas.EditingMode = InkCanvasEditingMode.None;
}
}
}
}
if (this.OutilSelectionne == "lasso" && !selectionZone.Contains(mousePos) && this.StrokeBeingDragged == null && this.StrokeBeingRotated == null)
{
StrokeCollection selection = new StrokeCollection();
for (int i = Traits.Count - 1; i >= 0; i--)
{
if (Traits[i].GetBounds().Contains(mousePos) && selection.Count == 0) //&& (Traits[i] as Form).Type != "Arrow")
{
if ((Traits[i] as Form).Type == "Arrow")
{
if (Traits[i].HitTest(mousePos))
{
selection.Add(Traits[i]);
}
}
else
{
selection.Add(Traits[i]);
}
}
}
editeur.HandleChangeSelection(selection);
}
else
{
this.isDragging = false;
editeur.HandleMouseDown(mousePos);
}
}
