void OnMouseDown(object sender, MouseButtonEventArgs e)
{
if (e.ChangedButton == MouseButton.Left && MouseGestureBase.IsOnlyButtonPressed(e, MouseButton.Left))
{
e.Handled = true;
IDesignPanel designPanel = (IDesignPanel)sender;
DesignPanelHitTestResult result =
designPanel.HitTest(e.GetPosition(designPanel), false, true, HitTestType.Default);
if (result.ModelHit != null)
{
var darwItemBehaviors = result.ModelHit.Extensions.OfType <IDrawItemExtension>();
var drawItembehavior = darwItemBehaviors.FirstOrDefault(x => x.CanItemBeDrawn(componentType));
if (drawItembehavior != null && drawItembehavior.CanItemBeDrawn(componentType))
{
drawItembehavior.StartDrawItem(result.ModelHit, componentType, designPanel, e);
}
else
{
var placementBehavior = result.ModelHit.GetBehavior <IPlacementBehavior>();
if (placementBehavior != null)
{
var createdItem = CreateItem(designPanel.Context);
new CreateComponentMouseGesture(result.ModelHit, createdItem, changeGroup)
.Start(designPanel, e);
// CreateComponentMouseGesture now is responsible for the changeGroup created by CreateItem()
changeGroup = null;
}
}
}
}
}
void OnMouseDown(object sender, MouseButtonEventArgs e)
{
IDesignPanel designPanel = (IDesignPanel)sender;
DesignPanelHitTestResult result = designPanel.HitTest(e.GetPosition(designPanel), false, true,
HitTestType.ElementSelection);
if (result.ModelHit != null)
{
IHandlePointerToolMouseDown b = result.ModelHit.GetBehavior <IHandlePointerToolMouseDown>();
if (b != null)
{
b.HandleSelectionMouseDown(designPanel, e, result);
}
if (!e.Handled)
{
if (e.ChangedButton == MouseButton.Left &&
MouseGestureBase.IsOnlyButtonPressed(e, MouseButton.Left))
{
e.Handled = true;
ISelectionService selectionService = designPanel.Context.Services.Selection;
bool setSelectionIfNotMoving = false;
if (selectionService.IsComponentSelected(result.ModelHit))
{
setSelectionIfNotMoving = true;
// There might be multiple components selected. We might have
// to set the selection to only the item clicked on
// (or deselect the item clicked on if Ctrl is pressed),
// but we should do so only if the user isn't performing a drag operation.
}
else
{
selectionService.SetSelectedComponents(new DesignItem[] { result.ModelHit },
SelectionTypes.Auto);
}
if (selectionService.IsComponentSelected(result.ModelHit))
{
new DragMoveMouseGesture(result.ModelHit, e.ClickCount == 2,
setSelectionIfNotMoving).Start(designPanel, e);
}
}
}
}
}