private static void SetIconicBitmap(Form f, Icon ico, Size sz,
bool bThumbnail)
{
Image img = null;
Bitmap bmp = null;
IntPtr hBmp = IntPtr.Zero;
try
{
IntPtr hWnd = f.Handle;
if (hWnd == IntPtr.Zero)
{
Debug.Assert(false); return;
}
img = UIUtil.ExtractVistaIcon(ico);
if (img == null)
{
img = ico.ToBitmap();
}
if (img == null)
{
Debug.Assert(false); return;
}
int sw = sz.Width, sh = sz.Height;
if (sw <= 0)
{
Debug.Assert(false); sw = 200;
} // Default Windows 7
if (sh <= 0)
{
Debug.Assert(false); sh = 109;
} // Default Windows 7
int iImgW = Math.Min(img.Width, 128);
int iImgH = Math.Min(img.Height, 128);
int iImgWMax = (sw * 4) / 6;
int iImgHMax = (sh * 4) / 6;
if (iImgW > iImgWMax)
{
float fRatio = (float)iImgWMax / (float)iImgW;
iImgW = iImgWMax;
iImgH = (int)((float)iImgH * fRatio);
}
if (iImgH > iImgHMax)
{
float fRatio = (float)iImgHMax / (float)iImgH;
iImgW = (int)((float)iImgW * fRatio);
iImgH = iImgHMax;
}
if ((iImgW <= 0) || (iImgH <= 0))
{
Debug.Assert(false); return;
}
if (iImgW > sw)
{
Debug.Assert(false); iImgW = sw;
}
if (iImgH > sh)
{
Debug.Assert(false); iImgH = sh;
}
int iImgX = (sw - iImgW) / 2;
int iImgY = (sh - iImgH) / 2;
// 32-bit color depth required by API
bmp = new Bitmap(sw, sh, PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(bmp))
{
Color clr = AppDefs.ColorControlDisabled;
g.Clear(clr);
using (LinearGradientBrush br = new LinearGradientBrush(
new Point(0, 0), new Point(sw, sh), UIUtil.LightenColor(
clr, 0.25), UIUtil.DarkenColor(clr, 0.25)))
{
g.FillRectangle(br, 0, 0, sw, sh);
}
// *After* drawing the gradient (otherwise border bug)
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.SmoothingMode = SmoothingMode.HighQuality;
RectangleF rSource = new RectangleF(0.0f, 0.0f,
img.Width, img.Height);
RectangleF rDest = new RectangleF(iImgX, iImgY, iImgW, iImgH);
GfxUtil.AdjustScaleRects(ref rSource, ref rDest);
// g.DrawImage(img, iImgX, iImgY, iImgW, iImgH);
g.DrawImage(img, rDest, rSource, GraphicsUnit.Pixel);
}
hBmp = bmp.GetHbitmap();
if (bThumbnail)
{
DwmSetIconicThumbnail(hWnd, hBmp, DWM_SIT_DISPLAYFRAME);
}
else
{
DwmSetIconicLivePreviewBitmap(hWnd, hBmp, IntPtr.Zero,
DWM_SIT_DISPLAYFRAME);
}
}
catch (Exception) { Debug.Assert(!WinUtil.IsAtLeastWindows7); }
finally
{
if (hBmp != IntPtr.Zero)
{
try { NativeMethods.DeleteObject(hBmp); }
catch (Exception) { Debug.Assert(false); }
}
if (bmp != null)
{
bmp.Dispose();
}
if (img != null)
{
img.Dispose();
}
}
}
