private void DragInitHandler(object sender, MouseButtonEventArgs e)
{
DragInitCommand.Execute(Figure);
}
protected override void OnMouseMove(MouseEventArgs e)
{
base.OnMouseMove(e);
if (e.LeftButton == MouseButtonState.Pressed)
{
if (Figure.Name != "Empty")
{
DragInitCommand.Execute(Figure);
DataObject data = new DataObject();
data.SetData("ChessFigure", FigureProperty);
data.SetData("Object", this);
UIElement control = FigImage;
// convert FrameworkElement to PNG stream
var pngStream = new MemoryStream();
control.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
Rect rect = new Rect(0, 0, control.DesiredSize.Width, control.DesiredSize.Height);
RenderTargetBitmap rtb = new RenderTargetBitmap((int)control.DesiredSize.Width, (int)control.DesiredSize.Height, 96, 96, PixelFormats.Pbgra32);
control.Arrange(rect);
rtb.Render(control);
PngBitmapEncoder png = new PngBitmapEncoder();
png.Frames.Add(BitmapFrame.Create(rtb));
png.Save(pngStream);
#region Some png shit at the begining
var cursorStream = new MemoryStream();
cursorStream.Write(new byte[2] {
0x00, 0x00
}, 0, 2);
cursorStream.Write(new byte[2] {
0x02, 0x00
}, 0, 2);
cursorStream.Write(new byte[2] {
0x01, 0x00
}, 0, 2);
cursorStream.Write(new byte[1] {
(byte)control.DesiredSize.Width
}, 0, 1);
cursorStream.Write(new byte[1] {
(byte)control.DesiredSize.Height
}, 0, 1);
cursorStream.Write(new byte[1] {
0x00
}, 0, 1);
cursorStream.Write(new byte[1] {
0x00
}, 0, 1);
cursorStream.Write(new byte[2] {
(byte)32.0, 0x00
}, 0, 2);
cursorStream.Write(new byte[2] {
(byte)32.0, 0x00
}, 0, 2);
cursorStream.Write(new byte[4] {
(byte)((pngStream.Length & 0x000000FF)),
(byte)((pngStream.Length & 0x0000FF00) >> 0x08),
(byte)((pngStream.Length & 0x00FF0000) >> 0x10),
(byte)((pngStream.Length & 0xFF000000) >> 0x18)
}, 0, 4);
cursorStream.Write(new byte[4] {
(byte)0x16,
(byte)0x00,
(byte)0x00,
(byte)0x00,
}, 0, 4);
#endregion
// copy PNG stream to cursor stream
pngStream.Seek(0, SeekOrigin.Begin);
pngStream.CopyTo(cursorStream);
// return cursor stream
cursorStream.Seek(0, SeekOrigin.Begin);
var customCursor = new Cursor(cursorStream);
Mouse.SetCursor(customCursor);
//Hide the element to make the illusion that the control is moving,
// while it's just the cursor which is changed
FigImage.Opacity = 0.5;
var effects = DragDrop.DoDragDrop(this, data, DragDropEffects.Move);
FigImage.Opacity = 1;
Mouse.SetCursor(Cursor);
}
}
}
