public static extern bool AdjustWindowRectEx(ref RECT lpRect, WS style, bool bMenu, WS_EX exStyle);
public static extern bool GetWindowRect(HWND hwnd, ref RECT lpRect);
public static extern bool GetClientRect(HWND hwnd, ref RECT lpRect);
/// <summary>
/// Returns a bitmap of the contents of the window.
/// </summary>
/// <remarks>
/// RedirectedWindow maintains a bitmap internally and only
/// allocates a new bitmap if the dimensions of the window
/// have changed. Even if UpdateRedirectedBitmap returns the same
/// bitmap, the contents are guaranteed to have been updated with
/// the current contents of the window.
/// </remarks>
public BitmapSource UpdateRedirectedBitmap()
{
RECT rcClient = new RECT();
NativeMethods.GetClientRect(Handle, ref rcClient);
if (_interopBitmap == null || rcClient.width != _bitmapWidth || rcClient.height != _bitmapHeight) {
if (_interopBitmap != null) {
DestroyBitmap();
}
CreateBitmap(rcClient.width, rcClient.height);
}
// PrintWindow doesn't seem to work any better than BitBlt.
// TODO: make it an option
// User32.NativeMethods.PrintWindow(Handle, _hDC, PW.DEFAULT);
IntPtr hdcSrc = NativeMethods.GetDC(Handle);
NativeMethods.BitBlt(_hDC, 0, 0, _bitmapWidth, _bitmapHeight, hdcSrc, 0, 0, ROP.SRCCOPY);
NativeMethods.ReleaseDC(Handle, hdcSrc);
if (_interopBitmap != null) {
_interopBitmap.Invalidate();
}
return _interopBitmap;
}
/// <summary>
/// Sizes the window such that the client area has the specified
/// size.
/// </summary>
public bool SetClientAreaSize(int width, int height)
{
POINT ptClient = new POINT();
NativeMethods.ClientToScreen(Handle, ref ptClient);
RECT rect = new RECT();
rect.left = ptClient.x;
rect.top = ptClient.y;
rect.right = rect.left + width;
rect.bottom = rect.top + height;
WS style = (WS)NativeMethods.GetWindowLong(Handle, GWL.STYLE);
WS_EX exStyle = (WS_EX)NativeMethods.GetWindowLong(Handle, GWL.EXSTYLE);
NativeMethods.AdjustWindowRectEx(ref rect, style, false, exStyle);
NativeMethods.SetWindowPos(
Handle,
HWND.NULL,
rect.left,
rect.top,
rect.width,
rect.height,
SWP.NOZORDER | SWP.NOCOPYBITS);
NativeMethods.GetClientRect(Handle, ref rect);
return rect.width == width && rect.height == height;
}
/// <summary>
/// Aligns the RedirectedWindow such that the specified client
/// coordinate is aligned with the specified screen coordinate.
/// </summary>
public void AlignClientAndScreen(int xClient, int yClient, int xScreen, int yScreen)
{
POINT pt = new POINT(xClient, yClient);
NativeMethods.ClientToScreen(Handle, ref pt);
int dx = xScreen - pt.x;
int dy = yScreen - pt.y;
RECT rcWindow = new RECT();
NativeMethods.GetWindowRect(Handle, ref rcWindow);
NativeMethods.SetWindowPos(
Handle,
HWND.NULL,
rcWindow.left + dx,
rcWindow.top + dy,
0,
0,
SWP.NOSIZE | SWP.NOZORDER | SWP.NOACTIVATE);
}
