328 lines
8.9 KiB
C++
328 lines
8.9 KiB
C++
// 27 april 2015
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#include "uipriv_windows.hpp"
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#define windowClass L"libui_uiWindowClass"
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struct uiWindow {
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uiWindowsControl c;
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HWND hwnd;
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HMENU menubar;
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struct child *child;
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BOOL shownOnce;
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int (*onClosing)(uiWindow *, void *);
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void *onClosingData;
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int margined;
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BOOL hasMenubar;
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};
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static void onDestroy(uiWindow *);
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uiWindowsDefineControlWithOnDestroy(
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uiWindow, // type name
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uiWindowType, // type function
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onDestroy(me); // on destroy
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)
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static LRESULT CALLBACK windowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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LONG_PTR ww;
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uiWindow *w;
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CREATESTRUCTW *cs = (CREATESTRUCTW *) lParam;
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WINDOWPOS *wp = (WINDOWPOS *) lParam;
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MINMAXINFO *mmi = (MINMAXINFO *) lParam;
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uiWindowsControl *c;
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intmax_t width, height;
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LRESULT lResult;
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ww = GetWindowLongPtrW(hwnd, GWLP_USERDATA);
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if (ww == 0) {
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if (uMsg == WM_CREATE)
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SetWindowLongPtrW(hwnd, GWLP_USERDATA, (LONG_PTR) (cs->lpCreateParams));
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// fall through to DefWindowProc() anyway
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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w = uiWindow((void *) ww);
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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_COMMAND:
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// not a menu
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if (lParam != 0)
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break;
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if (HIWORD(wParam) != 0)
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break;
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runMenuEvent(LOWORD(wParam), uiWindow(w));
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return 0;
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case WM_WINDOWPOSCHANGED:
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if ((wp->flags & SWP_NOSIZE) != 0)
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break;
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if (w->child != NULL)
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childQueueRelayout(w->child);
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return 0;
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case WM_GETMINMAXINFO:
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// ensure the user cannot resize the window smaller than its minimum size
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lResult = DefWindowProcW(hwnd, uMsg, wParam, lParam);
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c = uiWindowsControl(w);
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// TODO why is this message being sent too early?
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if (c->MinimumSize == NULL)
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return lResult;
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(*(c->MinimumSize))(c, NULL, &width, &height);
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// width and height are in client coordinates; ptMinTrackSize is in window coordinates
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clientSizeToWindowSize(w->hwnd, &width, &height, w->hasMenubar);
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mmi->ptMinTrackSize.x = width;
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mmi->ptMinTrackSize.y = height;
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return lResult;
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case WM_PRINTCLIENT:
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// we do no special painting; just erase the background
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// don't worry about the return value; we let DefWindowProcW() handle this message
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SendMessageW(hwnd, WM_ERASEBKGND, wParam, lParam);
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return 0;
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case WM_CLOSE:
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if ((*(w->onClosing))(w, w->onClosingData))
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uiControlDestroy(uiControl(w));
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return 0; // we destroyed it already
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}
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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ATOM registerWindowClass(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 = windowClass;
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wc.lpfnWndProc = windowWndProc;
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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 unregisterWindowClass(void)
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{
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if (UnregisterClassW(windowClass, hInstance) == 0)
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logLastError(L"error unregistering uiWindow window class");
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}
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static int defaultOnClosing(uiWindow *w, void *data)
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{
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return 0;
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}
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static void onDestroy(uiWindow *w)
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{
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// first hide ourselves
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ShowWindow(w->hwnd, SW_HIDE);
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// now destroy the child
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if (w->child != NULL)
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childDestroy(w->child);
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// now free the menubar, if any
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if (w->menubar != NULL)
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freeMenubar(w->menubar);
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}
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static void windowCommitShow(uiControl *c)
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{
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uiWindow *w = uiWindow(c);
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// just in case this wasn't called already
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ensureMinimumWindowSize(w);
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if (w->shownOnce) {
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ShowWindow(w->hwnd, SW_SHOW);
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return;
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}
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w->shownOnce = TRUE;
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// make sure the child is the correct size
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uiWindowsControlQueueRelayout(uiWindowsControl(w));
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ShowWindow(w->hwnd, nCmdShow);
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if (UpdateWindow(w->hwnd) == 0)
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logLastError(L"error calling UpdateWindow() after showing uiWindow for the first time");
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}
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static void windowContainerUpdateState(uiControl *c)
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{
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uiWindow *w = uiWindow(c);
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if (w->child != NULL)
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childUpdateState(w->child);
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}
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// from https://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing
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#define windowMargin 7
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static void minimumSize(uiWindowsControl *c, uiWindowsSizing *d, intmax_t *width, intmax_t *height)
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{
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uiWindow *w = uiWindow(c);
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*width = 0;
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*height = 0;
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d = uiWindowsNewSizing(w->hwnd);
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if (w->child != NULL)
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childMinimumSize(w->child, d, width, height);
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if (w->margined) {
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*width += 2 * uiWindowsDlgUnitsToX(windowMargin, d->BaseX);
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*height += 2 * uiWindowsDlgUnitsToY(windowMargin, d->BaseY);
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}
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uiWindowsFreeSizing(d);
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}
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static void windowRelayout(uiWindowsControl *c, intmax_t x, intmax_t y, intmax_t width, intmax_t height)
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{
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uiWindow *w = uiWindow(c);
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uiWindowsSizing *d;
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if (w->child == NULL)
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return;
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d = uiWindowsNewSizing(w->hwnd);
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if (w->margined) {
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x += uiWindowsDlgUnitsToX(windowMargin, d->BaseX);
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y += uiWindowsDlgUnitsToY(windowMargin, d->BaseY);
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width -= 2 * uiWindowsDlgUnitsToX(windowMargin, d->BaseX);
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height -= 2 * uiWindowsDlgUnitsToY(windowMargin, d->BaseY);
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}
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childRelayout(w->child, x, y, width, height);
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uiWindowsFreeSizing(d);
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}
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static void windowArrangeChildrenControlIDsZOrder(uiWindowsControl *c)
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{
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uiWindow *w = uiWindow(c);
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if (w->child != NULL)
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childSetSoleControlID(w->child);
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}
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char *uiWindowTitle(uiWindow *w)
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{
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return uiWindowsWindowText(w->hwnd);
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}
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void uiWindowSetTitle(uiWindow *w, const char *title)
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{
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uiWindowsSetWindowText(w->hwnd, title);
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// don't queue resize; the caption isn't part of what affects layout and sizing of the client area (it'll be ellipsized if too long)
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}
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void uiWindowOnClosing(uiWindow *w, int (*f)(uiWindow *, void *), void *data)
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{
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w->onClosing = f;
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w->onClosingData = data;
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}
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void uiWindowSetChild(uiWindow *w, uiControl *child)
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{
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if (w->child != NULL)
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childRemove(w->child);
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w->child = newChild(child, uiControl(w), w->hwnd);
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if (w->child != NULL) {
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childSetSoleControlID(w->child);
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childQueueRelayout(w->child);
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}
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}
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int uiWindowMargined(uiWindow *w)
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{
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return w->margined;
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}
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void uiWindowSetMargined(uiWindow *w, int margined)
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{
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w->margined = margined;
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uiWindowsControlQueueRelayout(uiWindowsControl(w));
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}
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// see http://blogs.msdn.com/b/oldnewthing/archive/2003/09/11/54885.aspx and http://blogs.msdn.com/b/oldnewthing/archive/2003/09/13/54917.aspx
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// TODO use clientSizeToWindowSize()
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static void setClientSize(uiWindow *w, int width, int height, BOOL hasMenubar, DWORD style, DWORD exstyle)
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{
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RECT window;
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window.left = 0;
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window.top = 0;
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window.right = width;
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window.bottom = height;
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if (AdjustWindowRectEx(&window, style, hasMenubar, exstyle) == 0)
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logLastError(L"error getting real window coordinates");
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if (hasMenubar) {
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RECT temp;
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temp = window;
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temp.bottom = 0x7FFF; // infinite height
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SendMessageW(w->hwnd, WM_NCCALCSIZE, (WPARAM) FALSE, (LPARAM) (&temp));
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window.bottom += temp.top;
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}
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if (SetWindowPos(w->hwnd, NULL, 0, 0, window.right - window.left, window.bottom - window.top, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOOWNERZORDER | SWP_NOZORDER) == 0)
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logLastError(L"error resizing window");
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}
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uiWindow *uiNewWindow(const char *title, int width, int height, int hasMenubar)
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{
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uiWindow *w;
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WCHAR *wtitle;
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BOOL hasMenubarBOOL;
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w = (uiWindow *) uiNewControl(uiWindowType());
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hasMenubarBOOL = FALSE;
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if (hasMenubar)
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hasMenubarBOOL = TRUE;
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w->hasMenubar = hasMenubarBOOL;
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#define style WS_OVERLAPPEDWINDOW
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#define exstyle 0
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wtitle = toUTF16(title);
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w->hwnd = CreateWindowExW(exstyle,
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windowClass, wtitle,
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style,
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CW_USEDEFAULT, CW_USEDEFAULT,
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// use the raw width and height for now
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// this will get CW_USEDEFAULT (hopefully) predicting well
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// even if it doesn't, we're adjusting it later
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width, height,
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NULL, NULL, hInstance, w);
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if (w->hwnd == NULL)
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logLastError(L"error creating window");
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uiFree(wtitle);
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if (hasMenubar) {
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w->menubar = makeMenubar();
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if (SetMenu(w->hwnd, w->menubar) == 0)
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logLastError(L"error giving menu to window");
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}
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// and use the proper size
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setClientSize(w, width, height, hasMenubarBOOL, style, exstyle);
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uiWindowOnClosing(w, defaultOnClosing, NULL);
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uiWindowsFinishNewControl(w, uiWindow);
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uiControl(w)->CommitShow = windowCommitShow;
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uiControl(w)->ContainerUpdateState = windowContainerUpdateState;
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uiWindowsControl(w)->Relayout = windowRelayout;
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uiWindowsControl(w)->ArrangeChildrenControlIDsZOrder = windowArrangeChildrenControlIDsZOrder;
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return w;
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}
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// this cannot queue a resize because it's called by the resize handler
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void ensureMinimumWindowSize(uiWindow *w)
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{
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uiWindowsControl *c;
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intmax_t width, height;
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RECT r;
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c = uiWindowsControl(w);
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(*(c->MinimumSize))(c, NULL, &width, &height);
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if (GetClientRect(w->hwnd, &r) == 0)
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logLastError(L"error getting client rect");
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if (width < (r.right - r.left)) // preserve width if larger
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width = r.right - r.left;
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if (height < (r.bottom - r.top)) // preserve height if larger
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height = r.bottom - r.top;
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clientSizeToWindowSize(w->hwnd, &width, &height, w->hasMenubar);
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if (SetWindowPos(w->hwnd, NULL, 0, 0, width, height, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOOWNERZORDER | SWP_NOZORDER) == 0)
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logLastError(L"error resizing window");
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}
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