private void SetupWindow()
{
// generate a random title if it's null (invalid)
if (_title == null)
{
_title = WindowHelper.GenerateRandomTitle();
}
if (string.IsNullOrEmpty(MenuName))
{
MenuName = WindowHelper.GenerateRandomTitle();
}
// if no class name is given then generate a "unique" one
if (string.IsNullOrEmpty(_className))
{
_className = WindowHelper.GenerateRandomClass();
}
// prepare window procedure
_windowProc = WindowProcedure;
_windowProcAddress = Marshal.GetFunctionPointerForDelegate(_windowProc);
// try to register our class
while (true)
{
var wndClassEx = new WindowClassEx
{
Size = WindowClassEx.NativeSize(),
Style = 0,
WindowProc = _windowProcAddress,
ClsExtra = 0,
WindowExtra = 0,
Instance = IntPtr.Zero,
Icon = IntPtr.Zero,
Curser = IntPtr.Zero,
Background = IntPtr.Zero,
MenuName = MenuName,
ClassName = _className,
IconSm = IntPtr.Zero
};
if (User32.RegisterClassEx(ref wndClassEx) != 0)
{
break;
}
else
{
// already taken name?
_className = WindowHelper.GenerateRandomClass();
}
}
var extendedWindowStyle = ExtendedWindowStyle.Transparent | ExtendedWindowStyle.Layered | ExtendedWindowStyle.NoActivate;
if (_isTopmost)
{
extendedWindowStyle |= ExtendedWindowStyle.Topmost;
}
var windowStyle = WindowStyle.Popup;
if (_isVisible)
{
windowStyle |= WindowStyle.Visible;
}
_handle = User32.CreateWindowEx(
extendedWindowStyle,
_className,
_title,
windowStyle,
_x, _y,
_width, _height,
IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
User32.SetLayeredWindowAttributes(_handle, 0, 255, LayeredWindowAttributes.Alpha);
User32.UpdateWindow(_handle);
// if the window is incompatible on some platforms then use
// SetWindowLong and UpdateWindow to set the style again and
// call SetWindowPos with SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED
if (_isVisible)
{
WindowHelper.ExtendFrameIntoClientArea(_handle);
}
}
/// <summary>
/// Adapts to another window in the postion and size.
/// </summary>
/// <param name="windowHandle">The target window handle.</param>
/// <param name="attachToClientArea">A Boolean determining whether to fit to the client area of the target window.</param>
public void FitToWindow(IntPtr windowHandle, bool attachToClientArea = false)
{
WindowBounds rect;
bool result = attachToClientArea ? WindowHelper.GetWindowClientBounds(windowHandle, out rect) : WindowHelper.GetWindowBounds(windowHandle, out rect);
if (result)
{
int x = rect.Left;
int y = rect.Top;
int width = rect.Right - rect.Left;
int height = rect.Bottom - rect.Top;
if (X != x ||
Y != y ||
Width != width ||
Height != height)
{
Resize(x, y, width, height);
}
}
}