void OnDragStarted(DragStartedMessage obj)
{
DraggingGatos = obj.Gatos;
// Hide the button, show the drop target
DropTarget.TranslateTo(0, 30);
}
public void ExecuteDraggingCommand(MouseEventArgs _e)
{
if (IsDragging)
{
//
// Raise the event to notify that dragging is in progress.
//
var curMousePoint = _e.GetPosition(ParentNetworkView.Visual);
var offset = curMousePoint - LastMousePoint;
if (offset.X != 0.0 || offset.Y != 0.0)
{
LastMousePoint = curMousePoint;
Messenger.Default.Send(new DragMessage(this, offset.X, offset.Y));
}
}
else if (isLeftMouseDown && ParentNetworkView.EnableNodeDragging)
{
//
// The user is left-dragging the node,
// but don't initiate the drag operation until
// the mouse cursor has moved more than the threshold distance.
//
var curMousePoint = _e.GetPosition(ParentNetworkView.Visual);
var dragDelta = curMousePoint - lastMousePoint;
var dragDistance = Math.Abs(dragDelta.Length);
if (dragDistance > dragThreshold)
{
//
// When the mouse has been dragged more than the threshold value commence dragging the node.
//
//
// Raise an event to notify that that dragging has commenced.
//
var msg = new DragStartedMessage(this);
Messenger.Default.Send(msg);
if (msg.Cancel)
{
//
// Handler of the event disallowed dragging of the node.
//
IsLeftMouseDown = false;
IsLeftMouseAndControlDown = false;
return;
}
IsDragging = true;
Visual.CaptureMouse();
_e.Handled = true;
}
}
}
private void DragStarted(DragStartedMessage _action)
{
IsDragging = true;
Mouse.OverrideCursor = Cursors.Hand;
}
