qwidget_x11.cpp

奇趣公司比较新的qt/emd版本

        // put it into netWmState
        if (!returnValue.isEmpty()) {
            memcpy(returnValue.data(), propertyData, returnValue.size() * sizeof(Atom));
        }
        XFree((char*) propertyData);
    }

    return returnValue;
}

void QWidgetPrivate::create_sys(WId window, bool initializeWindow, bool destroyOldWindow)
{
    Q_Q(QWidget);
    Qt::WindowType type = q->windowType();
    Qt::WindowFlags &flags = data.window_flags;
    QWidget *parentWidget = q->parentWidget();

    if (type == Qt::ToolTip)
        flags |= Qt::WindowStaysOnTopHint | Qt::FramelessWindowHint | Qt::X11BypassWindowManagerHint;
    if (type == Qt::Popup)
        flags |= Qt::X11BypassWindowManagerHint;

    bool topLevel = (flags & Qt::Window);
    bool popup = (type == Qt::Popup);
    bool dialog = (type == Qt::Dialog
                   || type == Qt::Sheet
                   || (flags & Qt::MSWindowsFixedSizeDialogHint));
    bool desktop = (type == Qt::Desktop);
    bool tool = (type == Qt::Tool || type == Qt::SplashScreen
                 || type == Qt::ToolTip || type == Qt::Drawer);

    if (topLevel) {
        if (parentWidget) { // if our parent stays on top, so must we
            QWidget *ptl = parentWidget->window();
            if(ptl && (ptl->windowFlags() & Qt::WindowStaysOnTopHint))
                flags |= Qt::WindowStaysOnTopHint;
        }

        if (type == Qt::SplashScreen) {
            if (X11->isSupportedByWM(ATOM(_NET_WM_WINDOW_TYPE_SPLASH))) {
                flags &= ~Qt::X11BypassWindowManagerHint;
            } else {
                flags |= Qt::X11BypassWindowManagerHint | Qt::FramelessWindowHint;
            }
        }
        // All these buttons depend on the system menu, so we enable it
        if (flags & (Qt::WindowMinimizeButtonHint
                     | Qt::WindowMaximizeButtonHint
                     | Qt::WindowContextHelpButtonHint))
            flags |= Qt::WindowSystemMenuHint;
    }


    Window parentw, destroyw = 0;
    WId id;

    // always initialize
    if (!window)
        initializeWindow = true;

    if (desktop &&
        qt_x11_create_desktop_on_screen >= 0 &&
        qt_x11_create_desktop_on_screen != xinfo.screen()) {
        // desktop on a certain screen other than the default requested
        QX11InfoData *xd = &X11->screens[qt_x11_create_desktop_on_screen];
        xinfo.setX11Data(xd);
    } else if (parentWidget && parentWidget->d_func()->xinfo.screen() != xinfo.screen()) {
        xinfo = parentWidget->d_func()->xinfo;
    }

    //get display, screen number, root window and desktop geometry for
    //the current screen
    Display *dpy = X11->display;
    int scr = xinfo.screen();
    Window root_win = RootWindow(dpy, scr);
    int sw = DisplayWidth(dpy,scr);
    int sh = DisplayHeight(dpy,scr);

    if (desktop) {                                // desktop widget
        dialog = popup = false;                        // force these flags off
        data.crect.setRect(0, 0, sw, sh);
    } else if (topLevel && !q->testAttribute(Qt::WA_Resized)) {
        int width = sw / 2;
        int height = 4 * sh / 10;
        if (extra) {
            width = qMax(qMin(width, extra->maxw), extra->minw);
            height = qMax(qMin(height, extra->maxh), extra->minh);
        }
        data.crect.setSize(QSize(width, height));
    }

    parentw = topLevel ? root_win : parentWidget->internalWinId();

    XSetWindowAttributes wsa;

    if (window) {                                // override the old window
        if (destroyOldWindow) {
            if (topLevel)
                X11->dndEnable(q, false);
            destroyw = data.winid;
        }
        id = window;
        setWinId(window);
        XWindowAttributes a;
        XGetWindowAttributes(dpy, window, &a);
        data.crect.setRect(a.x, a.y, a.width, a.height);

        if (a.map_state == IsUnmapped)
            q->setAttribute(Qt::WA_WState_Visible, false);
        else
            q->setAttribute(Qt::WA_WState_Visible);

        QX11InfoData* xd = xinfo.getX11Data(true);

        // find which screen the window is on...
        xd->screen = QX11Info::appScreen(); // by default, use the default :)
        int i;
        for (i = 0; i < ScreenCount(dpy); i++) {
            if (RootWindow(dpy, i) == a.root) {
                xd->screen = i;
                break;
            }
        }

        xd->depth = a.depth;
        xd->cells = DisplayCells(dpy, xd->screen);
        xd->visual = a.visual;
        xd->defaultVisual = (XVisualIDFromVisual((Visual *) a.visual) ==
                             XVisualIDFromVisual((Visual *) QX11Info::appVisual(xinfo.screen())));
        xd->colormap = a.colormap;
        xd->defaultColormap = (a.colormap == QX11Info::appColormap(xinfo.screen()));
        xinfo.setX11Data(xd);
    } else if (desktop) {                        // desktop widget
#ifdef QWIDGET_EXTRA_DEBUG
        qDebug() << "create desktop";
#endif
        id = (WId)parentw;                        // id = root window
//         QWidget *otherDesktop = find(id);        // is there another desktop?
//         if (otherDesktop && otherDesktop->testWFlags(Qt::WPaintDesktop)) {
//             otherDesktop->d->setWinId(0);        // remove id from widget mapper
//             d->setWinId(id);                     // make sure otherDesktop is
//             otherDesktop->d->setWinId(id);       // found first
//         } else {
        setWinId(id);
//         }
    } else {
#ifdef QWIDGET_EXTRA_DEBUG
        static int topLevels = 0;
        static int children = 0;
        if (parentw == root_win)
            qDebug() << "create toplevel" << ++topLevels;
        else
            qDebug() << "create child" << ++children;
#endif
        QRect safeRect = data.crect; //##### must handle huge sizes as well.... i.e. wrect
        if (safeRect.width() < 1|| safeRect.height() < 1) {
            if (topLevel) {
                // top-levels must be at least 1x1
                safeRect.setSize(safeRect.size().expandedTo(QSize(1, 1)));
            } else {
                // create it way off screen, and rely on
                // setWSGeometry() to do the right thing with it later
                safeRect = QRect(-1000,-1000,1,1);
            }
        }
        if (xinfo.defaultVisual() && xinfo.defaultColormap()) {
            id = (WId)qt_XCreateSimpleWindow(q, dpy, parentw,
                                             safeRect.left(), safeRect.top(),
                                             safeRect.width(), safeRect.height(),
                                             0,
                                             BlackPixel(dpy, xinfo.screen()),
                                             WhitePixel(dpy, xinfo.screen()));
        } else {
            wsa.background_pixel = WhitePixel(dpy, xinfo.screen());
            wsa.border_pixel = BlackPixel(dpy, xinfo.screen());
            wsa.colormap = xinfo.colormap();
            id = (WId)qt_XCreateWindow(q, dpy, parentw,
                                       safeRect.left(), safeRect.top(),
                                       safeRect.width(), safeRect.height(),
                                       0, xinfo.depth(), InputOutput,
                                       (Visual *) xinfo.visual(),
                                       CWBackPixel|CWBorderPixel|CWColormap,
                                       &wsa);
        }

        setWinId(id);                                // set widget id/handle + hd
    }

#ifndef QT_NO_XRENDER
    if (picture) {
        XRenderFreePicture(X11->display, picture);
        picture = 0;
    }

    if (X11->use_xrender) {
        XRenderPictFormat *format = XRenderFindVisualFormat(dpy, (Visual *) xinfo.visual());
        if (format)
            picture = XRenderCreatePicture(dpy, id, format, 0, 0);
    }
#endif // QT_NO_XRENDER

    // NET window types
    long net_wintypes[7] = { 0, 0, 0, 0, 0, 0, 0 };
    int curr_wintype = 0;

    QtMWMHints mwmhints;
    mwmhints.flags = 0L;
    mwmhints.functions = MWM_FUNC_ALL;
    mwmhints.decorations = MWM_DECOR_ALL;
    mwmhints.input_mode = 0L;
    mwmhints.status = 0L;

    if (topLevel) {
        ulong wsa_mask = 0;
        if (type == Qt::SplashScreen) {
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_SPLASH);
        } else { //       if (customize) {
            mwmhints.decorations = 0L;
            mwmhints.flags |= MWM_HINTS_DECORATIONS;

            if (flags & Qt::FramelessWindowHint) {
                // override netwm type - quick and easy for KDE noborder
                net_wintypes[curr_wintype++] = ATOM(_KDE_NET_WM_WINDOW_TYPE_OVERRIDE);
            } else {
                mwmhints.decorations |= MWM_DECOR_BORDER;
                mwmhints.decorations |= MWM_DECOR_RESIZEH;

                if (flags & Qt::WindowTitleHint)
                    mwmhints.decorations |= MWM_DECOR_TITLE;

                if (flags & Qt::WindowSystemMenuHint)
                    mwmhints.decorations |= MWM_DECOR_MENU;

                if (flags & Qt::WindowMinimizeButtonHint)
                    mwmhints.decorations |= MWM_DECOR_MINIMIZE;

                if (flags & Qt::WindowMaximizeButtonHint)
                    mwmhints.decorations |= MWM_DECOR_MAXIMIZE;
            }
        }

        if (tool) {
            wsa.save_under = True;
            wsa_mask |= CWSaveUnder;
        }
        // ### need a better way to do this
        if (q->inherits("QMenu")) {
            // menu netwm type
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_MENU);
        } else if (q->inherits("QToolBar")) {
            // toolbar netwm type
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_TOOLBAR);
        } else if (type == Qt::Tool || type == Qt::Drawer) {
            // utility netwm type
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_UTILITY);
        }

        if (dialog) // dialog netwm type
            net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_DIALOG);
        // normal netwm type - default
        net_wintypes[curr_wintype++] = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);

        if (flags & Qt::X11BypassWindowManagerHint) {
            wsa.override_redirect = True;
            wsa_mask |= CWOverrideRedirect;
        }

        if (wsa_mask && initializeWindow)
            XChangeWindowAttributes(dpy, id, wsa_mask, &wsa);
    }


    if (!initializeWindow) {
        // do no initialization
    } else if (popup) {                        // popup widget
        wsa.override_redirect = True;
        wsa.save_under = True;
        XChangeWindowAttributes(dpy, id, CWOverrideRedirect | CWSaveUnder,
                                &wsa);
    } else if (topLevel && !desktop) {        // top-level widget
        if (!X11->wm_client_leader)
            create_wm_client_leader();

        // note: WM_TRANSIENT_FOR is set in QWidgetPrivate::show_sys()

        XSizeHints size_hints;
        size_hints.flags = USSize | PSize | PWinGravity;
        size_hints.x = data.crect.left();
        size_hints.y = data.crect.top();
        size_hints.width = data.crect.width();
        size_hints.height = data.crect.height();
        size_hints.win_gravity =
            QApplication::isRightToLeft() ? NorthEastGravity : NorthWestGravity;

        XWMHints wm_hints;                        // window manager hints
        wm_hints.flags = InputHint | StateHint | WindowGroupHint;
        wm_hints.input = True;
        wm_hints.initial_state = NormalState;
        wm_hints.window_group = X11->wm_client_leader;

        XClassHint class_hint;
        QByteArray appName = qAppName().toLatin1();
        class_hint.res_name = appName.data(); // application name
        class_hint.res_class = const_cast<char *>(QX11Info::appClass());   // application class

        XSetWMProperties(dpy, id, 0, 0, 0, 0, &size_hints, &wm_hints, &class_hint);

        XResizeWindow(dpy, id,
                      qBound(1, data.crect.width(), XCOORD_MAX),
                      qBound(1, data.crect.height(), XCOORD_MAX));
        XStoreName(dpy, id, appName.data());
        Atom protocols[4];
        int n = 0;
        protocols[n++] = ATOM(WM_DELETE_WINDOW);        // support del window protocol
        protocols[n++] = ATOM(WM_TAKE_FOCUS);                // support take focus window protocol
        protocols[n++] = ATOM(_NET_WM_PING);                // support _NET_WM_PING protocol
        if (flags & Qt::WindowContextHelpButtonHint)
            protocols[n++] = ATOM(_NET_WM_CONTEXT_HELP);
        XSetWMProtocols(dpy, id, protocols, n);

        // set mwm hints
        SetMWMHints(dpy, id, mwmhints);

        // set _NET_WM_WINDOW_TYPE
        if (curr_wintype > 0)
            XChangeProperty(dpy, id, ATOM(_NET_WM_WINDOW_TYPE), XA_ATOM, 32, PropModeReplace,
                            (unsigned char *) net_wintypes, curr_wintype);
        else
            XDeleteProperty(dpy, id, ATOM(_NET_WM_WINDOW_TYPE));

        // set _NET_WM_PID
        long curr_pid = getpid();
        XChangeProperty(dpy, id, ATOM(_NET_WM_PID), XA_CARDINAL, 32, PropModeReplace,
                        (unsigned char *) &curr_pid, 1);

        // when we create a toplevel widget, the frame strut should be dirty
        data.fstrut_dirty = 1;

        // declare the widget's object name as window role
        QByteArray objName = q->objectName().toLocal8Bit();
        XChangeProperty(dpy, id,
                        ATOM(WM_WINDOW_ROLE), XA_STRING, 8, PropModeReplace,
                        (unsigned char *)objName.constData(), objName.length());

        // set client leader property
        XChangeProperty(dpy, id, ATOM(WM_CLIENT_LEADER),
                        XA_WINDOW, 32, PropModeReplace,
                        (unsigned char *)&X11->wm_client_leader, 1);
    } else {
        // non-toplevel widgets don't have a frame, so no need to
        // update the strut
        data.fstrut_dirty = 0;
    }

    if (initializeWindow) {
        // don't erase when resizing
        wsa.bit_gravity = QApplication::isRightToLeft() ? NorthEastGravity : NorthWestGravity;
        XChangeWindowAttributes(dpy, id, CWBitGravity, &wsa);
    }