119 lines
2.8 KiB
C
119 lines
2.8 KiB
C
// 22 may 2015
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#include "uipriv_windows.h"
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// see http://stackoverflow.com/questions/25494914/is-there-something-like-cdn-filecancel-analogous-to-cdn-fileok-for-getting-when#comment40420049_25494914
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struct dialogDisableWindow {
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HWND hwnd;
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uintmax_t n;
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BOOL prevstate;
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UT_hash_handle hh;
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};
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static struct dialogDisableWindow *windows = NULL;
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void dialogHelperRegisterWindow(HWND hwnd)
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{
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struct dialogDisableWindow *d;
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HASH_FIND_PTR(windows, &hwnd, d);
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if (d != NULL)
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complain("window handle %p already register in dialogHelperRegisterWindow()", hwnd);
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d = uiNew(struct dialogDisableWindow);
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d->hwnd = hwnd;
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HASH_ADD_PTR(windows, hwnd, d);
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}
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void dialogHelperUnregisterWindow(HWND hwnd)
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{
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struct dialogDisableWindow *d;
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HASH_FIND_PTR(windows, &hwnd, d);
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if (d == NULL)
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complain("window handle %p not registered in dialogHelperUnregisterWindow()", hwnd);
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HASH_DEL(windows, d);
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uiFree(d);
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}
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static void dialogBegin(void)
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{
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struct dialogDisableWindow *d;
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BOOL prevstate;
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for (d = windows; d != NULL; d = d->hh.next) {
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prevstate = EnableWindow(d->hwnd, FALSE);
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// store the previous state in case the window was already disabled by the user
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// note the !; EnableWindow() returns TRUE if window was previously /disabled/
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if (d->n == 0)
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d->prevstate = !prevstate;
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d->n++;
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}
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}
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static void dialogEnd(void)
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{
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struct dialogDisableWindow *d;
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for (d = windows; d != NULL; d = d->hh.next) {
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d->n--;
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if (d->n == 0)
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EnableWindow(d->hwnd, d->prevstate);
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}
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}
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#define dialogHelperClass L"libui_dialogHelperClass"
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static LRESULT CALLBACK dialogHelperWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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switch (uMsg) {
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case WM_CREATE:
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dialogBegin();
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break;
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case WM_ENABLE:
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if (wParam != (WPARAM) FALSE) // enabling
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dialogEnd();
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break;
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}
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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ATOM initDialogHelper(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 = dialogHelperClass;
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wc.lpfnWndProc = dialogHelperWndProc;
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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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return RegisterClassW(&wc);
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}
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void uninitDialogHelper(void)
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{
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if (UnregisterClassW(dialogHelperClass, hInstance) == 0)
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logLastError("error unregistering dialog helper window class in uninitDialogHelper()");
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}
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HWND beginDialogHelper(void)
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{
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HWND hwnd;
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hwnd = CreateWindowExW(0,
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dialogHelperClass, L"libui dialog helper",
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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 (hwnd == NULL)
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logLastError("error creating dialog helper in beginDialogHelper()");
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return hwnd;
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}
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void endDialogHelper(HWND hwnd)
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{
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if (DestroyWindow(hwnd) == 0)
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logLastError("error cleaning up after dialog helper in endDialogHelper()");
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}
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