public static void DrawTextOnGlass(IntPtr hwnd, String text, Font font, Rectangle ctlrct, int iglowSize)
{
if (IsCompositionEnabled())
{
RECT rc = new RECT();
RECT rc2 = new RECT();
rc.left = ctlrct.Left;
rc.right = ctlrct.Right; // + 2 * iglowSize; //make it larger to contain the glow effect
rc.top = ctlrct.Top;
rc.bottom = ctlrct.Bottom; // + 2 * iglowSize;
//Just the same rect with rc,but (0,0) at the lefttop
rc2.left = 0;
rc2.top = 0;
rc2.right = rc.right - rc.left;
rc2.bottom = rc.bottom - rc.top;
IntPtr destdc = WinAPI.GetDC(hwnd); //hwnd must be the handle of form,not control
IntPtr Memdc = WinAPI.CreateCompatibleDC(destdc); // Set up a memory DC where we'll draw the text.
IntPtr bitmap;
IntPtr bitmapOld = IntPtr.Zero;
IntPtr logfnotOld;
int uFormat = Constants.DT_SINGLELINE | Constants.DT_CENTER | Constants.DT_VCENTER | Constants.DT_NOPREFIX; //text format
IntPtr ptPixels = IntPtr.Zero;
BITMAPINFO dib = new BITMAPINFO();
dib.bmiHeader.biHeight = -(rc.bottom - rc.top); // negative because DrawThemeTextEx() uses a top-down DIB
dib.bmiHeader.biWidth = rc.right - rc.left;
dib.bmiHeader.biPlanes = 1;
dib.bmiHeader.biSize = Marshal.SizeOf(typeof(BITMAPINFOHEADER));
dib.bmiHeader.biBitCount = 32;
dib.bmiHeader.biCompression = Constants.BI_RGB;
dib.bmiColors.rgbBlue = 255;
if (!(WinAPI.SaveDC(Memdc) == 0))
{
bitmap = WinAPI.CreateDIBSection(Memdc, ref dib, Constants.DIB_RGB_COLORS, out ptPixels, IntPtr.Zero, 0); // Create a 32-bit bmp for use in offscreen drawing when glass is on
if (!(bitmap == IntPtr.Zero))
{
bitmapOld = WinAPI.SelectObject(Memdc, bitmap);
IntPtr hFont = font.ToHfont();
logfnotOld = WinAPI.SelectObject(Memdc, hFont);
try
{
System.Windows.Forms.VisualStyles.VisualStyleRenderer renderer = new System.Windows.Forms.VisualStyles.VisualStyleRenderer(System.Windows.Forms.VisualStyles.VisualStyleElement.Window.Caption.Active);
DTTOPTS dttOpts = new DTTOPTS();
dttOpts.dwSize = (uint)Marshal.SizeOf(typeof(DTTOPTS));
dttOpts.dwFlags = Constants.DTT_COMPOSITED | Constants.DTT_GLOWSIZE;
dttOpts.iGlowSize = iglowSize;
for (int i = (-(dib.bmiHeader.biWidth * dib.bmiHeader.biHeight) - 1); i >= 0; i--)
{
Marshal.WriteInt32(
(IntPtr)((long)ptPixels + Marshal.SizeOf(typeof(int)) * i),
GetAeroBackgroundColor().ToArgb()
);
}
WinAPI.DrawThemeTextEx(renderer.Handle, Memdc, 1, 1, text, -1, uFormat, ref rc2, ref dttOpts);
WinAPI.BitBlt(destdc, rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, Memdc, 0, 0, Constants.SRCCOPY);
}
catch (Exception e)
{
System.Diagnostics.Trace.WriteLine(e.Message);
}
//Remember to clean up
WinAPI.SelectObject(Memdc, bitmapOld);
WinAPI.SelectObject(Memdc, logfnotOld);
WinAPI.DeleteObject(bitmap);
WinAPI.DeleteObject(hFont);
WinAPI.ReleaseDC(Memdc, -1);
WinAPI.DeleteDC(Memdc);
}
}
}
}