前置文字/问题
我正在尝试制作一个相当简单的工具来帮助调试变量值。我希望它完全包含在类中。最终产品是我可以在类中使用像ShowThisValue（任何内容）的函数。
我遇到的问题是，如果可能的话，我无法想出将该过程放在类内的方法。以下是短版本及其问题。
-代码已于11/29/13再次更新- -我现在将其放在自己的项目中。
viewvars TEST; // global
TEST.CreateTestWindow(hThisInstance); // in WinMain() right before ShowWindow(hwnd, nFunsterStil);
[viewvars.h] 整个更新的
class viewvars {
private:
HWND hWindow; // the window, a pointer to
LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);
static LRESULT CALLBACK ThisWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
public:
viewvars(); // blank constructor
int CreateTestWindow(HINSTANCE hInst);
};
// blank constructor
viewvars::viewvars() {}
// create the window
int viewvars::CreateTestWindow(HINSTANCE hInst) {
// variables
char thisClassName[] = "viewVars";
MSG msg;
WNDCLASS wincl;
// check for class info and modify the info
if (!GetClassInfo(hInst, thisClassName, &wincl)) {
wincl.style = 0;
wincl.hInstance = hInst;
wincl.lpszClassName = thisClassName;
wincl.lpfnWndProc = &ThisWindowProc;
wincl.cbClsExtra = 0;
wincl.cbWndExtra = 0;
wincl.hIcon = NULL;
wincl.hCursor = NULL;
wincl.hbrBackground = (HBRUSH)COLOR_BTNSHADOW;
wincl.lpszMenuName = NULL;
if (RegisterClass(&wincl) == 0) {
MessageBox(NULL,"The window class failed to register.","Error",0);
return -1;
}
}
// create window
hWindow = CreateWindow(thisClassName, "Test", WS_POPUP | WS_CLIPCHILDREN, 10, 10, 200, 200, NULL, NULL, hInst, this);
if (hWindow == NULL) {
MessageBox(NULL,"Problem creating the window.","Error",0);
return -1;
}
// show window
ShowWindow(hWindow, TRUE);
// message loop
while (GetMessage(&msg, hWindow, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
// then quit window?
DestroyWindow(hWindow);
hWindow = NULL;
return msg.wParam;
}
// window proc
LRESULT CALLBACK viewvars::ThisWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
MessageBox(NULL,"Has it gone this far?","Bench",0);
// variable
viewvars *view;
// ????
if (message == WM_NCCREATE) {
CREATESTRUCT *cs = (CREATESTRUCT*)lParam;
view = (viewvars*) cs->lpCreateParams;
SetLastError(0);
if (SetWindowLongPtr(hwnd, GWL_USERDATA, (LONG_PTR) view) == 0) {
if (GetLastError() != 0) {
MessageBox(NULL,"There has been an error near here.","Error",0);
return FALSE;
}
}
}
else {
view = (viewvars*) GetWindowLongPtr(hwnd, GWL_USERDATA);
}
if (view) return view->WindowProc(message, wParam, lParam);
MessageBox(NULL,"If shown, the above statement did not return, and the statement below did.","Error",0);
return DefWindowProc(hwnd, message, wParam, lParam);
}
LRESULT viewvars::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) {
// you can access non-static members in here...
MessageBox(NULL,"Made it to window proc.","Error",0);
switch (message)
{
case WM_PAINT:
return 0;
break;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
break;
default:
MessageBox(NULL,"DefWindowProc Returned.","Error",0);
return DefWindowProc(hWindow, message, wParam, lParam);
break;
}
}
这些消息框以以下顺序出现：
- 已经到了这一步吗？
- 到达窗口处理程序
- DefWindowProc返回
- 已经到了这一步吗？ // 重复的？
- 到达窗口处理程序
- DefWindowProc返回
- 创建窗口时出现问题
感谢迄今为止的帮助。您知道问题可能在哪里吗？