private static void DrawCursor(IntPtr hCursor, Graphics graphics, Point location)
{
location.X += (int)graphics.Transform.OffsetX;
location.Y += (int)graphics.Transform.OffsetY;
User32Interop.ICONINFO iconInfo;
if (!User32Interop.GetIconInfo(hCursor, out iconInfo))
{
return;
}
if (iconInfo.hbmColor != IntPtr.Zero)
{
Gdi32Interop.DeleteObject(iconInfo.hbmColor);
}
if (iconInfo.hbmMask != IntPtr.Zero)
{
Gdi32Interop.DeleteObject(iconInfo.hbmMask);
}
IntPtr hdc = graphics.GetHdc();
try {
int x = location.X - iconInfo.xHotspot;
int y = location.Y - iconInfo.xHotspot;
Size size = GetCursorSize();
int width = size.Width;
int height = size.Height;
Gdi32Interop.IntersectClipRect(hdc, x, y, x + width, y + height);
User32Interop.DrawIconEx(hdc, x, y, hCursor, width, height, 0, IntPtr.Zero, Gdi32Interop.DI_NORMAL);
}
finally {
graphics.ReleaseHdcInternal(hdc);
}
}
public void Prepare(Graphics graphics)
{
if (!User32Interop.GetCursorPos(out this.cursorPos))
{
this.cursorPos = Point.Empty;
}
}
private static Size GetCursorSize()
{
int width = User32Interop.GetSystemMetrics(User32Interop.SystemMetric.SM_CXCURSOR);
int height = User32Interop.GetSystemMetrics(User32Interop.SystemMetric.SM_CYCURSOR);
return(new Size(width, height));
}
private static Rectangle GetPrimaryScreenBounds()
{
int width = User32Interop.GetSystemMetrics(User32Interop.SystemMetric.SM_CXSCREEN);
int height = User32Interop.GetSystemMetrics(User32Interop.SystemMetric.SM_CYSCREEN);
return(new Rectangle(0, 0, width, height));
}
private static Point GetCursorPos()
{
Point cursorPos;
if (User32Interop.GetCursorPos(out cursorPos))
{
return(cursorPos);
}
return(Point.Empty);
}
private static int GetPrimaryScreenBitDepth()
{
int bitDepth;
IntPtr hdc = User32Interop.GetDC(IntPtr.Zero);
try {
bitDepth = Gdi32Interop.GetDeviceCaps(hdc, Gdi32Interop.DeviceCap.BITSPIXEL);
bitDepth *= Gdi32Interop.GetDeviceCaps(hdc, Gdi32Interop.DeviceCap.PLANES);
}
finally {
User32Interop.ReleaseDC(IntPtr.Zero, hdc);
}
return(bitDepth);
}
private static void DrawDefaultCursor(Graphics graphics, Point location)
{
IntPtr hCursor = User32Interop.LoadCursor(IntPtr.Zero, User32Interop.IDC_ARROW);
try {
DrawCursor(hCursor, graphics, location);
}
finally {
if (hCursor != IntPtr.Zero)
{
User32Interop.DestroyCursor(hCursor);
}
}
}
