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);
}
}
}
}
private void RefreshCtrl()
{
if (m_bIsRefreshing)
{
return;
}
int width = host.ClientRectangle.Width;
int height = host.ClientRectangle.Height;
m_bIsRefreshing = true;
IntPtr hDC = WinAPI.GetDC(host.Handle);
if (hDC == IntPtr.Zero)
{
m_bIsRefreshing = false;
Debug.Assert(false, "GetDC failed.");
return;
}
IntPtr hdcMemory = WinAPI.CreateCompatibleDC(hDC);
int nBytesPerLine = ((width * 32 + 31) & (~31)) >> 3;
BITMAPINFO stBmpInfoHeader = new BITMAPINFO();
stBmpInfoHeader.bmiHeader.biSize = Marshal.SizeOf(stBmpInfoHeader);
stBmpInfoHeader.bmiHeader.biWidth = width;
stBmpInfoHeader.bmiHeader.biHeight = height;
stBmpInfoHeader.bmiHeader.biPlanes = 1;
stBmpInfoHeader.bmiHeader.biBitCount = 32;
stBmpInfoHeader.bmiHeader.biCompression = 0;
stBmpInfoHeader.bmiHeader.biClrUsed = 0;
stBmpInfoHeader.bmiHeader.biSizeImage = nBytesPerLine * height;
IntPtr pvBits = IntPtr.Zero;
IntPtr hbmpMem = WinAPI.CreateDIBSection(hDC
, ref stBmpInfoHeader
, Constants.DIB_RGB_COLORS
, out pvBits
, IntPtr.Zero
, 0
);
Debug.Assert(hbmpMem != IntPtr.Zero, "CreateDIBSection failed.");
if (hbmpMem != null)
{
IntPtr hbmpOld = WinAPI.SelectObject(hdcMemory, hbmpMem);
Graphics graphic = Graphics.FromHdcInternal(hdcMemory);
graphic.FillRectangle(new SolidBrush(BackColor), graphic.ClipBounds);
foreach (Control ctrl in host.Controls)
{
Bitmap bmp = new Bitmap(ctrl.Width, ctrl.Height);
Rectangle rect = new Rectangle(0, 0, ctrl.Width, ctrl.Height);
ctrl.DrawToBitmap(bmp, rect);
graphic.DrawImage(bmp, ctrl.Location);
}
POINT ptSrc = new POINT(0, 0);
POINT ptWinPos = new POINT(host.Left, host.Top);
SIZE szWin = new SIZE(width, height);
BLENDFUNCTION stBlend = new BLENDFUNCTION(Constants.AC_SRC_OVER, 0, 0xFF, Constants.AC_SRC_ALPHA);
WinAPI.UpdateLayeredWindow(host.Handle
, hDC
, ref ptWinPos
, ref szWin
, hdcMemory
, ref ptSrc
, 0
, ref stBlend
, Constants.ULW_ALPHA
);
graphic.Dispose();
WinAPI.SelectObject(hbmpMem, hbmpOld);
WinAPI.DeleteObject(hbmpMem);
}
WinAPI.DeleteDC(hdcMemory);
WinAPI.DeleteDC(hDC);
m_bIsRefreshing = false;
}