private static void SelectVertex(DependencyObject vc)
{
if (DragBehaviour.GetIsTagged(vc))
{
HighlightBehaviour.SetHighlighted(vc, false);
DragBehaviour.SetIsTagged(vc, false);
}
else
{
HighlightBehaviour.SetHighlighted(vc, true);
DragBehaviour.SetIsTagged(vc, true);
}
}
/// <summary>
/// Select vertex by setting its tag and highlight value
/// </summary>
/// <param name="vc">VertexControl object</param>
private void SelectVertex(DependencyObject vc)
{
if (DragBehaviour.GetIsTagged(vc))
{
HighlightBehaviour.SetHighlighted(vc, false);
DragBehaviour.SetIsTagged(vc, false);
vc.ClearValue(DragBehaviour.XSnapModifierProperty);
vc.ClearValue(DragBehaviour.YSnapModifierProperty);
}
else
{
HighlightBehaviour.SetHighlighted(vc, true);
DragBehaviour.SetIsTagged(vc, true);
DragBehaviour.SetXSnapModifier(vc, ExaggeratedSnappingXModifier);
DragBehaviour.SetYSnapModifier(vc, ExaggeratedSnappingYModifier);
}
}
void mi_Click(object sender, RoutedEventArgs e)
{
var menuItem = sender as MenuItem;
if (menuItem == null)
{
return;
}
var vc = menuItem.Tag as VertexControl;
//if clicked vertex is tagged then remove all tagged vertices
if (DragBehaviour.GetIsTagged(vc))
{
dg_remvertex_Click(null, null);
}
else //else remove only selected vertex
if (vc != null)
{
SafeRemoveVertex(vc);
}
}
void dg_Area_VertexSelected(object sender, VertexSelectedEventArgs args)
{
if (args.MouseArgs.LeftButton == MouseButtonState.Pressed)
{
if (Keyboard.IsKeyDown(Key.LeftCtrl))
{
SelectVertex(args.VertexControl);
}
}
else if (args.MouseArgs.RightButton == MouseButtonState.Pressed)
{
var countTagged = dg_Area.VertexList.Values.Count(DragBehaviour.GetIsTagged);
var isTagged = DragBehaviour.GetIsTagged(args.VertexControl);
args.VertexControl.ContextMenu = new ContextMenu();
var mi = new MenuItem {
Header = "Delete item" + (isTagged && countTagged > 1 ? "s" : ""), Tag = args.VertexControl, Margin = new Thickness(5)
};
mi.Click += mi_Click;
args.VertexControl.ContextMenu.Items.Add(mi);
args.VertexControl.ContextMenu.IsOpen = true;
}
}
