void HandleSave(object sender, ExecutedRoutedEventArgs e)
{
var fileDialog = new SaveFileDialog();
fileDialog.AddExtension = true;
fileDialog.CheckPathExists = true;
fileDialog.DefaultExt = "png";
fileDialog.FileName = FilePath;
if (fileDialog.ShowDialog(this).Value)
{
FilePath = fileDialog.FileName;
VisualCaptureUtil.SaveVisual
(
DataContext as Visual,
int.Parse
(
((TextBlock)((ComboBoxItem)dpiBox.SelectedItem).Content).Text
),
FilePath
);
Close();
}
}
// https://stackoverflow.com/a/27077188/122048
private static Cursor ConvertToCursor(UIElement control, Point hotSpot = default)
{
// convert FrameworkElement to PNG stream
using (var pngStream = new MemoryStream())
{
control.InvalidateMeasure();
control.InvalidateArrange();
control.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
var rect = new Rect(0, 0, control.DesiredSize.Width, control.DesiredSize.Height);
control.Arrange(rect);
control.UpdateLayout();
var rtb = VisualCaptureUtil.RenderVisual(control, new Size(control.DesiredSize.Width, control.DesiredSize.Height), 96, PixelFormats.Pbgra32);
var encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(rtb));
encoder.Save(pngStream);
// write cursor header info
using (var cursorStream = new MemoryStream())
{
cursorStream.Write(new byte[2]
{
0x00,
0x00
}, 0, 2); // ICONDIR: Reserved. Must always be 0.
cursorStream.Write(new byte[2]
{
0x02,
0x00
}, 0, 2); // ICONDIR: Specifies image type: 1 for icon (.ICO) image, 2 for cursor (.CUR) image. Other values are invalid
cursorStream.Write(new byte[2]
{
0x01,
0x00
}, 0, 2); // ICONDIR: Specifies number of images in the file.
cursorStream.Write(new byte[1]
{
(byte)control.DesiredSize.Width
}, 0, 1); // ICONDIRENTRY: Specifies image width in pixels. Can be any number between 0 and 255. Value 0 means image width is 256 pixels.
cursorStream.Write(new byte[1]
{
(byte)control.DesiredSize.Height
}, 0, 1); // ICONDIRENTRY: Specifies image height in pixels. Can be any number between 0 and 255. Value 0 means image height is 256 pixels.
cursorStream.Write(new byte[1]
{
0x00
}, 0, 1); // ICONDIRENTRY: Specifies number of colors in the color palette. Should be 0 if the image does not use a color palette.
cursorStream.Write(new byte[1]
{
0x00
}, 0, 1); // ICONDIRENTRY: Reserved. Should be 0.
cursorStream.Write(new byte[2]
{
(byte)hotSpot.X,
0x00
}, 0, 2); // ICONDIRENTRY: Specifies the horizontal coordinates of the hotspot in number of pixels from the left.
cursorStream.Write(new byte[2]
{
(byte)hotSpot.Y,
0x00
}, 0, 2); // ICONDIRENTRY: Specifies the vertical coordinates of the hotspot in number of pixels from the top.
cursorStream.Write(new byte[4]
{
// ICONDIRENTRY: Specifies the size of the image's data in bytes
(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]
{
// ICONDIRENTRY: Specifies the offset of BMP or PNG data from the beginning of the ICO/CUR file
0x16,
0x00,
0x00,
0x00
}, 0, 4);
// copy PNG stream to cursor stream
pngStream.Seek(0, SeekOrigin.Begin);
pngStream.CopyTo(cursorStream);
// return cursor stream
cursorStream.Seek(0, SeekOrigin.Begin);
return(new Cursor(cursorStream));
}
}
}
