public static void Paint <TState, TParam>(Graphics g, IWin32Window w, Rectangle rc, PaintAction <TState, TParam> f, TState currentState, TState newState, uint duration, TParam optParam)
{
try
{
if (System.Environment.OSVersion.Version.Major >= 6 && NativeMethods.BufferedPaintInit() == IntPtr.Zero)
{
using (var hdc = new SafeGDIHandle(g))
{
if (!hdc.IsInvalid)
{
// see if this paint was generated by a soft-fade animation
if (!NativeMethods.BufferedPaintRenderAnimation(w.Handle, hdc))
{
NativeMethods.BufferedPaintAnimationParams animParams = new NativeMethods.BufferedPaintAnimationParams {
Duration = duration
};
IntPtr hdcFrom, hdcTo;
using (var h = new BufferedPaintHandle(w.Handle, hdc, ref rc, ref animParams, out hdcFrom, out hdcTo))
{
if (!h.IsInvalid)
{
if (hdcFrom != IntPtr.Zero)
{
using (Graphics gfxFrom = Graphics.FromHdc(hdcFrom))
f(gfxFrom, rc, currentState, optParam);
}
if (hdcTo != IntPtr.Zero)
{
using (Graphics gfxTo = Graphics.FromHdc(hdcTo))
f(gfxTo, rc, newState, optParam);
}
}
else
{
hdc.Dispose();
f(g, rc, newState, optParam);
}
}
}
}
}
NativeMethods.BufferedPaintUnInit();
}
else
{
f(g, rc, newState, optParam);
}
}
catch { }
}
