SetWindowSubclass 设置窗口子类回调
SetWindowSubclass 设置窗口子类回调
今天想给一个 Static 控件添加一个鼠标相关的事件：移入，移出，按下，松开事件
一开始以为在
while (GetMessage (&messages, NULL, 0, 0))
{ /* Translate virtual-key messages into character messages */
TranslateMessage(&messages);
...
}
这里捕获，发现不行。搞了半天，也没达到效果。
后来无意发现一个API：SetWindowSubclass
LRESULT CALLBACK MySubclassProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
{ switch (uMsg)
{ case WM_NCDESTROY:
{
RemoveWindowSubclass(hWnd, &MySubclassProc, uIdSubclass); break;
} case WM_MOUSELEAVE:
{ //printf("WM_MOUSELEAVE\n");
SendMessage(hwnd_lbl_back, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM) hBitmap_back); //设置图标
break;
} case WM_MOUSEMOVE:
{ //printf("WM_MOUSEMOVE\n"); //为了捕获 WM_MOUSELEAVE
TRACKMOUSEEVENT tme = {0};
tme.cbSize = sizeof(tme);
tme.hwndTrack = hWnd;
tme.dwFlags = TME_LEAVE; // tme.dwFlags = TME_LEAVE | TME_HOVER; // tme.dwHoverTime = 1;
TrackMouseEvent(&tme); //--------------------------
if(wParam & MK_LBUTTON) //按下 {
SendMessage(hwnd_lbl_back, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM) hBitmap_back_pressed); //设置图标 } else
{
SendMessage(hwnd_lbl_back, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM) hBitmap_back_over); //设置图标 } break;
} case WM_LBUTTONDOWN: //按下 { //printf("WM_LBUTTONDOWN\n");
SendMessage(hwnd_lbl_back, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM) hBitmap_back_pressed); //设置图标
break;
} case WM_LBUTTONUP: //松开 { //printf("WM_LBUTTONUP\n");
SendMessage(hwnd_lbl_back, STM_SETIMAGE, IMAGE_BITMAP, (LPARAM) hBitmap_back_over); //设置图标
break;
}
} return DefSubclassProc(hWnd, uMsg, wParam, lParam);
}
hwnd_lbl_back = CreateWindowEx(0, "static", "", // WS_CHILD | WS_VISIBLE | SS_NOTIFY | SS_BITMAP, //SS_GRAYFRAME 使用背景色 | WS_DISABLED 4, // xpos 4, // ypos 28, //width 28, //height hwnd_frame, (HMENU)id_lbl_back, g_hInstance, NULL) ; SetWindowSubclass(hwnd_lbl_back, &MySubclassProc, 0, (DWORD_PTR) REF_BACK); //设置窗口子类回调
问题解决，SetWindowSubclass () 这么好用的API，我还是刚刚知道，第一次使用。
惭愧惭愧