protected override void OnPreviewMouseMove(System.Windows.Input.MouseEventArgs e)
{
base.OnPreviewMouseMove(e);
if (!IsEnabled)
{
return;
}
Rect newBounds = this.initialBounds;
Point pos = e.GetPosition(this);
double dx = pos.X - mouseDownPosition.X;
double dy = pos.Y - mouseDownPosition.Y;
if (dragging == Corner.Middle)
{
newBounds.X += dx;
newBounds.Y += dy;
this.bounds = newBounds;
PinToLimits();
InvalidateVisual();
}
else if (dragging != Corner.None)
{
// actually move the shape!
switch (dragging)
{
case Corner.TopLeft:
newBounds.X += dx;
newBounds.Y += dy;
newBounds.Width = Math.Max(0, newBounds.Width - dx);
newBounds.Height = Math.Max(0, newBounds.Height - dy);
break;
case Corner.TopMiddle:
newBounds.Y += dy;
newBounds.Height = Math.Max(0, newBounds.Height - dy);
break;
case Corner.TopRight:
newBounds.Width = Math.Max(0, newBounds.Width + dx);
newBounds.Height = Math.Max(0, newBounds.Height - dy);
newBounds.Y += dy;
break;
case Corner.MiddleLeft:
newBounds.Width = Math.Max(0, newBounds.Width - dx);
newBounds.X += dx;
break;
case Corner.MiddleRight:
newBounds.Width = Math.Max(0, newBounds.Width + dx);
break;
case Corner.BottomLeft:
newBounds.X += dx;
newBounds.Height = Math.Max(0, newBounds.Height + dy);
newBounds.Width = Math.Max(0, newBounds.Width - dx);
break;
case Corner.BottomMiddle:
newBounds.Height = Math.Max(0, newBounds.Height + dy);
break;
case Corner.BottomRight:
newBounds.Width = Math.Max(0, newBounds.Width + dx);
newBounds.Height = Math.Max(0, newBounds.Height + dy);
break;
}
this.bounds = newBounds;
PinToLimits();
InvalidateVisual();
if (Resizing != null)
{
Resizing(this, EventArgs.Empty);
}
}
else
{
if (TopLeftThumb.Contains(pos))
{
Cursor = System.Windows.Input.Cursors.SizeNWSE;
}
else if (TopMiddleThumb.Contains(pos))
{
Cursor = System.Windows.Input.Cursors.SizeNS;
}
else if (TopRightThumb.Contains(pos))
{
Cursor = System.Windows.Input.Cursors.SizeNESW;
}
else if (MiddleLeftThumb.Contains(pos))
{
Cursor = System.Windows.Input.Cursors.SizeWE;
}
else if (MiddleRightThumb.Contains(pos))
{
Cursor = System.Windows.Input.Cursors.SizeWE;
}
else if (BottomLeftThumb.Contains(pos))
{
Cursor = System.Windows.Input.Cursors.SizeNESW;
}
else if (BottomMiddleThumb.Contains(pos))
{
Cursor = System.Windows.Input.Cursors.SizeNS;
}
else if (BottomRightThumb.Contains(pos))
{
Cursor = System.Windows.Input.Cursors.SizeNWSE;
}
else
{
Cursor = System.Windows.Input.Cursors.Arrow;
}
}
}
protected override void OnPreviewMouseLeftButtonDown(System.Windows.Input.MouseButtonEventArgs e)
{
base.OnPreviewMouseLeftButtonDown(e);
if (!IsEnabled)
{
// resizing is not enabled.
dragging = Corner.None;
return;
}
Cursor = System.Windows.Input.Cursors.Arrow;
Point pos = e.GetPosition(this);
if (TopLeftThumb.Contains(pos))
{
dragging = Corner.TopLeft;
}
else if (TopMiddleThumb.Contains(pos))
{
dragging = Corner.TopMiddle;
}
else if (TopRightThumb.Contains(pos))
{
dragging = Corner.TopRight;
}
else if (MiddleLeftThumb.Contains(pos))
{
dragging = Corner.MiddleLeft;
}
else if (MiddleRightThumb.Contains(pos))
{
dragging = Corner.MiddleRight;
}
else if (BottomLeftThumb.Contains(pos))
{
dragging = Corner.BottomLeft;
}
else if (BottomMiddleThumb.Contains(pos))
{
dragging = Corner.BottomMiddle;
}
else if (BottomRightThumb.Contains(pos))
{
dragging = Corner.BottomRight;
}
else
{
dragging = Corner.Middle;
}
initialBounds = bounds;
e.Handled = true;
mouseDownPosition = pos;
System.Windows.Input.Mouse.Capture(this);
if (timer == null)
{
timer = new DispatcherTimer(TimeSpan.FromMilliseconds(30), DispatcherPriority.Normal, OnTimerTick, this.Dispatcher);
timer.Start();
}
}