我创建了一个自定义消息类型,用于调整我的大小Window
,称为WM_NEED_RESIZE
。我已在 .h 文件中定义它,并在 .cpp 文件中初始化。我也注册了我的WindowProc
接受消息的功能。以下是这些项目的代码:
const uint32 WindowsGLWindow::WM_NEED_RESIZE = WM_USER + 100;
LONG WINAPI WindowsGLWindow::WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
static PAINTSTRUCT ps;// do I need this?
static sint32 newWidth = 0;
static sint32 newHeight = 0;
bool res = false;
switch (uMsg) {
case WM_PAINT:
//display();
BeginPaint(hWnd, &ps);
EndPaint(hWnd, &ps);
return 0;
case WM_SIZE:
//glViewport(0, 0, LOWORD(lParam), HIWORD(lParam));
res = PostMessage(hWnd, WindowsGLWindow::WM_NEED_RESIZE, wParam, lParam);
std::cout << "WM_SIZE: " << res << std::endl;
return 0;
case WindowsGLWindow::WM_NEED_RESIZE:
std::cout << "WindowsGLWindow::WM_NEED_RESIZE" << std::endl;
break;
case WM_CHAR:
switch (wParam) {
case 27: /* ESC key */
PostQuitMessage(0);
break;
}
return 0;
case WM_CLOSE:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
在我正在运行的另一个函数中PeekMessage(..)
收集所有消息。这是消息泵的片段:
MSG msg;
while (PeekMessage(&msg, 0, 0, 0, PM_REMOVE) == TRUE) // maybe use GetInputState(?) as well?
{
if (msg.message == WM_QUIT)
retVal = -1;
if (msg.message == WindowsGLWindow::WM_NEED_RESIZE) {
uint32 newWidth = LOWORD(msg.lParam);
uint32 newHeight = HIWORD(msg.lParam);
std::cout << "PeekMessage: WindowsGLWindow::WM_NEED_RESIZE" << std::endl;
// call resize only if our window-size changed
if ((newWidth != width_) || (newHeight != height_)) {
resize(newWidth, newHeight);
}
PostMessage(msg.hwnd, WM_PAINT, 0, 0);
}
switch (msg.message) {
case WM_MOUSEMOVE:
// Retrieve mouse screen position
//int x = (short) LOWORD(lParam);
//int y = (short) HIWORD(lParam);
// Check to see if the left button is held down:
//bool leftButtonDown = wParam & MK_LBUTTON;
// Check if right button down:
//bool rightButtonDown = wParam & MK_RBUTTON;
break;
case WM_LBUTTONDOWN:
case WM_RBUTTONDOWN:
case WM_LBUTTONUP:
case WM_RBUTTONUP:
case WM_KEYUP:
case WM_KEYDOWN:
/*
switch (msg.wParam) {
case 'W':
// w key pressed
break;
case VK_RIGHT:
// Right arrow pressed
break;
default:
break;
}
*/
break;
}
TranslateMessage(&msg);
DispatchMessage(&msg);
}
我的问题是WM_NEED_RESIZE
只找到消息once当窗口第一次打开时在消息队列中,之后我再也没有在消息队列中找到它PeekMessage(..)
。我真的不知道为什么会发生这种情况。它is,然而,被接收WindowProc(..)
方法(这对我没有太大帮助)。我将不胜感激你们能提供的任何帮助。
Thanks
Jarrett