public override void MouseLeftButtonDown(QuadDocument document, QuadCanvas canvas, System.Windows.Input.MouseButtonEventArgs e)
{
startPoint = e.GetPosition(canvas);
QuadCanvasItem item = canvas.GetItemHit(startPoint);
bool shifyKeyPressed = Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift);
if (item != null)
{
if (shifyKeyPressed)
{
canvas.SelectedItems.Add(item.Quadrilateral);
}
else
{
canvas.SelectedItem = item.Quadrilateral;
}
}
else
{
if (!shifyKeyPressed)
{
canvas.SelectedItem = null;
}
inMove = false;
}
}
void QuadCanvas_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
foreach (Quadrilateral q in e.AddedItems)
{
QuadCanvasItem item = QuadToCanvasItem(q);
if (item != null)
{
item.IsSelected = true;
}
}
foreach (Quadrilateral q in e.RemovedItems)
{
QuadCanvasItem item = QuadToCanvasItem(q);
if (item != null)
{
item.IsSelected = false;
}
}
}
private static void OnQuadrilateralChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
QuadCanvasItem canvasItem = d as QuadCanvasItem;
canvasItem.Quadrilateral_Changed(e);
}
private static void OnIsSelectedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
QuadCanvasItem canvasItem = d as QuadCanvasItem;
canvasItem.UpdateView();
}