private static void self_MouseDown(object sender, MouseButtonEventArgs e)
{
FrameworkElement self = (FrameworkElement)sender;
ResizeWay resizable = (ResizeWay)self.GetValue(ResizableWayProperty);
if (resizable == ResizeWay.None)
{
return;
}
bool captured = self.CaptureMouse();
if (captured)
{
Point lastPosition = self.PointToScreen(e.GetPosition(self));
self.SetValue(CapturedProperty, true);
self.SetValue(LastPositionProperty, lastPosition);
e.Handled = true;
}
}
public static void SetResizeWay(DependencyObject d, ResizeWay value)
{
d.SetValue(ResizeWayProperty, value);
}
private static void self_MouseMove(object sender, MouseEventArgs e)
{
try
{
FrameworkElement self = (FrameworkElement)sender;
double minHeight = (double)self.GetValue(MinHeightProperty);
double minWidth = (double)self.GetValue(MinWidthProperty);
//Debug.WriteLine(string.Format("self_MouseMove minHeight:{0}; minWidth:{1}", minHeight, minWidth));
bool captured = (bool)self.GetValue(CapturedProperty);
if (captured)
{
var position = self.PointToScreen(e.GetPosition(self));
ResizeWay resizableWay = (ResizeWay)self.GetValue(ResizableWayProperty);
Point lastPosition = (Point)self.GetValue(LastPositionProperty);
var offsetX = position.X - lastPosition.X;
if ((resizableWay & ResizeWay.Left) == ResizeWay.Left)
{
offsetX = Math.Min(offsetX, self.ActualWidth - minWidth);
self.Width -= offsetX;
Window window = self as Window;
if (window != null)
{
window.Left += offsetX;
}
}
else if ((resizableWay & ResizeWay.Right) == ResizeWay.Right)
{
offsetX = Math.Max(offsetX, minWidth - self.ActualWidth);
self.Width += offsetX;
}
var offsetY = position.Y - lastPosition.Y;
if ((resizableWay & ResizeWay.Top) == ResizeWay.Top)
{
offsetY = Math.Min(offsetY, self.ActualHeight - minHeight);
self.Height -= offsetY;
Window window = self as Window;
if (window != null)
{
window.Top += offsetY;
}
}
else if ((resizableWay & ResizeWay.Bottom) == ResizeWay.Bottom)
{
offsetY = Math.Max(offsetY, minHeight - self.ActualHeight);
self.Height += offsetY;
}
lastPosition = position;
self.SetValue(LastPositionProperty, lastPosition);
e.Handled = true;
}
else
{
ResizeWay resizeWay = GetResizeWay(self);
ResizeWay resizableWay = ResizeWay.None;
var position = e.GetPosition(self);
if (position.Y < THRESHOLD)
{
resizableWay |= ResizeWay.Top;
}
else if (position.Y > self.ActualHeight - THRESHOLD && position.Y < self.ActualHeight - 1)
{
resizableWay |= ResizeWay.Bottom;
}
if (position.X < THRESHOLD)
{
resizableWay |= ResizeWay.Left;
}
else if (position.X > self.ActualWidth - THRESHOLD && position.X < self.ActualWidth - 1)
{
resizableWay |= ResizeWay.Right;
}
resizableWay &= resizeWay;
self.SetValue(ResizableWayProperty, resizableWay);
if (resizableWay != ResizeWay.None)
{
if ((resizableWay & ResizeWay.Left) == ResizeWay.Left)
{
if ((resizableWay & ResizeWay.Top) == ResizeWay.Top)
{
self.Cursor = Cursors.SizeNWSE;
}
else if ((resizableWay & ResizeWay.Bottom) == ResizeWay.Bottom)
{
self.Cursor = Cursors.SizeNESW;
}
else
{
self.Cursor = Cursors.SizeWE;
}
}
else if ((resizableWay & ResizeWay.Right) == ResizeWay.Right)
{
if ((resizableWay & ResizeWay.Top) == ResizeWay.Top)
{
self.Cursor = Cursors.SizeNESW;
}
else if ((resizableWay & ResizeWay.Bottom) == ResizeWay.Bottom)
{
self.Cursor = Cursors.SizeNWSE;
}
else
{
self.Cursor = Cursors.SizeWE;
}
}
else if ((resizableWay & ResizeWay.Top) == ResizeWay.Top)
{
self.Cursor = Cursors.SizeNS;
}
else if ((resizableWay & ResizeWay.Bottom) == ResizeWay.Bottom)
{
self.Cursor = Cursors.SizeNS;
}
e.Handled = true;
}
else
{
self.Cursor = Cursors.Arrow;
}
}
}
catch (Exception ex)
{
Debug.WriteLine("self_MouseMove exception:" + ex.Message);
}
}
