Method _wndproc

Demo/ShowFrameWhenDrag.py:65–78

(self, hwnd, msg, wparam, lparam)

            int(self.winId()), GWL_WNDPROC, self._newwndproc)

    def _wndproc(self, hwnd, msg, wparam, lparam):
        if msg == WM_NCLBUTTONDOWN:
            # 获取系统本身是否已经开启
            isDragFullWindow = GetDragFullwindows()
            if isDragFullWindow != 0:
                # 开启虚线框
                SetDragFullwindows(0)
                # 系统本身处理
                ret = CallWindowProc(
                    self._oldwndproc, hwnd, msg, wparam, lparam)
                # 关闭虚线框
                SetDragFullwindows(1)
                return ret
        return CallWindowProc(self._oldwndproc, hwnd, msg, wparam, lparam)


if __name__ == '__main__':