77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
// 14 may 2015
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#include "uipriv_windows.hpp"
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// The utility window is a special window that performs certain tasks internal to libui.
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// It is not a message-only window, and it is always hidden and disabled.
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// Its roles:
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// - It is the initial parent of all controls. When a control loses its parent, it also becomes that control's parent.
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// - It handles WM_QUERYENDSESSION and console end session requests.
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// - It handles WM_WININICHANGE and forwards the message to any child windows that request it.
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// - It handles executing functions queued to run by uiQueueMain().
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#define utilWindowClass L"libui_utilWindowClass"
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HWND utilWindow;
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static LRESULT CALLBACK utilWindowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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void (*qf)(void *);
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LRESULT lResult;
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if (handleParentMessages(hwnd, uMsg, wParam, lParam, &lResult) != FALSE)
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return lResult;
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switch (uMsg) {
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case WM_QUERYENDSESSION:
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// TODO block handler
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if (shouldQuit()) {
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uiQuit();
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return TRUE;
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}
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return FALSE;
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case WM_WININICHANGE:
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issueWM_WININICHANGE(wParam, lParam);
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return 0;
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case msgQueued:
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qf = (void (*)(void *)) wParam;
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(*qf)((void *) lParam);
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return 0;
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}
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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const char *initUtilWindow(HICON hDefaultIcon, HCURSOR hDefaultCursor)
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{
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WNDCLASSW wc;
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ZeroMemory(&wc, sizeof (WNDCLASSW));
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wc.lpszClassName = utilWindowClass;
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wc.lpfnWndProc = utilWindowWndProc;
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wc.hInstance = hInstance;
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wc.hIcon = hDefaultIcon;
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wc.hCursor = hDefaultCursor;
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wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
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if (RegisterClass(&wc) == 0)
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// see init.cpp for an explanation of the =s
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return "=registering utility window class";
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utilWindow = CreateWindowExW(0,
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utilWindowClass, L"libui utility window",
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WS_OVERLAPPEDWINDOW,
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0, 0, 100, 100,
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NULL, NULL, hInstance, NULL);
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if (utilWindow == NULL)
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return "=creating utility window";
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// and just to be safe
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EnableWindow(utilWindow, FALSE);
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return NULL;
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}
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void uninitUtilWindow(void)
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{
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if (DestroyWindow(utilWindow) == 0)
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logLastError(L"error destroying utility window");
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if (UnregisterClass(utilWindowClass, hInstance) == 0)
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logLastError(L"error unregistering utility window class");
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}
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