private void UpdateCursor(WindowResizeGripDirection direction)
{
switch (direction)
{
case WindowResizeGripDirection.None:
this.Cursor = Cursors.Arrow;
break;
case WindowResizeGripDirection.Left:
case WindowResizeGripDirection.Right:
this.Cursor = Cursors.SizeWE;
break;
case WindowResizeGripDirection.Top:
case WindowResizeGripDirection.Bottom:
this.Cursor = Cursors.SizeNS;
break;
case WindowResizeGripDirection.TopLeft:
case WindowResizeGripDirection.BottomRight:
this.Cursor = Cursors.SizeNWSE;
break;
case WindowResizeGripDirection.TopRight:
case WindowResizeGripDirection.BottomLeft:
this.Cursor = Cursors.SizeNESW;
break;
}
}
private void BeginResize(WindowResizeGripDirection direction)
{
HwndSource hwndSource = (HwndSource)PresentationSource.FromVisual((Visual)this);
if (hwndSource == null)
{
return;
}
NativeMethods.SendMessage(hwndSource.Handle, 274, (IntPtr)((int)(61440 + direction)), IntPtr.Zero);
}
protected override void OnMouseDown(MouseButtonEventArgs e)
{
base.OnMouseDown(e);
WindowResizeGripDirection direction = this.HitTest(e.GetPosition((IInputElement)this));
if (direction == WindowResizeGripDirection.None)
{
return;
}
this.BeginResize(direction);
}
