/// <summary> Doubleclick callback function. </summary>
/// <param name="nativeHost"> The Chromely native host interface. </param>
public void DblClickCallbackFunc(IChromelyNativeHost nativeHost)
{
// Toggle between normal (restore) and maximized
var state = nativeHost.GetWindowState();
if (state == WindowState.Maximize)
{
nativeHost.SetWindowState(WindowState.Normal);
}
else
{
nativeHost.SetWindowState(WindowState.Maximize);
}
}
private IntPtr WndProc(IntPtr hWnd, uint message, IntPtr wParam, IntPtr lParam)
{
var msg = (WM)message;
var isDraggableArea = IsDraggableArea(msg, lParam);
switch (msg)
{
case WM.LBUTTONDOWN:
{
if (!isDraggableArea)
{
break;
}
var state = _nativeHost.GetWindowState();
if (state == WindowState.Maximize)
{
break;
}
GetCursorPos(out var point);
ScreenToClient(_nativeHost.Handle, ref point);
_dragPoint = new POINT(point.X, point.Y);
// TODO: For some reason it only works when called twice in a row. Try to resolve it later.
SetCapture(hWnd);
SetCapture(hWnd);
return(IntPtr.Zero);
}
case WM.CAPTURECHANGED:
{
_hasCapture = lParam == hWnd;
return(IntPtr.Zero);
}
case WM.MOUSEMOVE:
{
if (_hasCapture)
{
var currentPoint = new Point((int)lParam);
var current = new Point(currentPoint.X, currentPoint.Y);
ClientToScreen(_nativeHost.Handle, ref current);
var position = new Point(current.X - _dragPoint.x, current.Y - _dragPoint.y);
SetWindowPos(_nativeHost.Handle, IntPtr.Zero, position.X, position.Y, 0, 0,
SWP.NOACTIVATE
| SWP.NOZORDER
| SWP.NOOWNERZORDER
| SWP.NOSIZE);
return(IntPtr.Zero);
}
break;
}
case WM.LBUTTONUP:
{
if (_hasCapture)
{
ReleaseCapture();
}
break;
}
case WM.LBUTTONDBLCLK:
{
if (!isDraggableArea)
{
break;
}
_framelessOption.DblClick(_nativeHost);
break;
}
}
return(CallWindowProc(_originalWndProc, hWnd, message, wParam, lParam));
}