qwidget_x11.cpp

奇趣公司比较新的qt/emd版本

void QWidgetPrivate::dirtyWidget_sys(const QRegion &rgn)
{
    Q_Q(QWidget);
    if (!rgn.isEmpty()) {
        dirtyOnScreen += rgn;
        QApplication::postEvent(q, new QEvent(QEvent::UpdateRequest), Qt::LowEventPriority);
    }
}

void QWidgetPrivate::cleanWidget_sys(const QRegion& rgn)
{
    dirtyOnScreen -= rgn;
}

void QWidget::setWindowState(Qt::WindowStates newstate)
{
    Q_D(QWidget);
    bool needShow = false;
    Qt::WindowStates oldstate = windowState();
    if (oldstate == newstate)
        return;
    if (isWindow()) {
        // Ensure the initial size is valid, since we store it as normalGeometry below.
        if (!testAttribute(Qt::WA_Resized) && !isVisible())
            adjustSize();

        QTLWExtra *top = d->topData();

        if ((oldstate & Qt::WindowMaximized) != (newstate & Qt::WindowMaximized)) {
            if (X11->isSupportedByWM(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ))
                && X11->isSupportedByWM(ATOM(_NET_WM_STATE_MAXIMIZED_VERT))) {
                if ((newstate & Qt::WindowMaximized) && !(oldstate & Qt::WindowFullScreen))
                    top->normalGeometry = geometry();
                qt_change_net_wm_state(this, (newstate & Qt::WindowMaximized),
                                       ATOM(_NET_WM_STATE_MAXIMIZED_HORZ),
                                       ATOM(_NET_WM_STATE_MAXIMIZED_VERT));
            } else if (! (newstate & Qt::WindowFullScreen)) {
                if (newstate & Qt::WindowMaximized) {
                    // save original geometry
                    const QRect normalGeometry = geometry();

                    if (isVisible()) {
                        data->fstrut_dirty = true;
                        const QRect maxRect = QApplication::desktop()->availableGeometry(this);
                        const QRect r = top->normalGeometry;
                        const QRect fs = d->frameStrut();
                        setGeometry(maxRect.x() + fs.left(),
                                    maxRect.y() + fs.top(),
                                    maxRect.width() - fs.left() - fs.right(),
                                    maxRect.height() - fs.top() - fs.bottom());
                        top->normalGeometry = r;
                    }

                    if (top->normalGeometry.width() < 0)
                        top->normalGeometry = normalGeometry;
                } else {
                    // restore original geometry
                    setGeometry(top->normalGeometry);
                }
            }
        }

        if ((oldstate & Qt::WindowFullScreen) != (newstate & Qt::WindowFullScreen)) {
            if (X11->isSupportedByWM(ATOM(_NET_WM_STATE_FULLSCREEN))) {
                if (newstate & Qt::WindowFullScreen) {
                    top->normalGeometry = geometry();
                    top->fullScreenOffset = d->frameStrut().topLeft();
                }
                qt_change_net_wm_state(this, (newstate & Qt::WindowFullScreen),
                                       ATOM(_NET_WM_STATE_FULLSCREEN));
            } else {
                needShow = isVisible();

                if (newstate & Qt::WindowFullScreen) {
                    data->fstrut_dirty = true;
                    const QRect normalGeometry = geometry();
                    const QPoint fullScreenOffset = d->frameStrut().topLeft();

                    top->savedFlags = windowFlags();
                    setParent(0, Qt::Window | Qt::FramelessWindowHint);
                    const QRect r = top->normalGeometry;
                    setGeometry(qApp->desktop()->screenGeometry(this));
                    top->normalGeometry = r;

                    if (top->normalGeometry.width() < 0) {
                        top->normalGeometry = normalGeometry;
                        top->fullScreenOffset = fullScreenOffset;
                    }
                } else {
                    setParent(0, top->savedFlags);

                    if (newstate & Qt::WindowMaximized) {
                        // from fullscreen to maximized
                        data->fstrut_dirty = true;
                        const QRect maxRect = QApplication::desktop()->availableGeometry(this);
                        const QRect r = top->normalGeometry;
                        const QRect fs = d->frameStrut();
                        setGeometry(maxRect.x() + fs.left(),
                                    maxRect.y() + fs.top(),
                                    maxRect.width() - fs.left() - fs.right(),
                                    maxRect.height() - fs.top() - fs.bottom());
                        top->normalGeometry = r;
                    } else {
                        // restore original geometry
                        setGeometry(top->normalGeometry.adjusted(-top->fullScreenOffset.x(),
                                                                 -top->fullScreenOffset.y(),
                                                                 -top->fullScreenOffset.x(),
                                                                 -top->fullScreenOffset.y()));
                    }
                }
            }
        }

        createWinId();
        Q_ASSERT(testAttribute(Qt::WA_WState_Created));
        if ((oldstate & Qt::WindowMinimized) != (newstate & Qt::WindowMinimized)) {
            if (isVisible()) {
                if (newstate & Qt::WindowMinimized) {
                    XEvent e;
                    e.xclient.type = ClientMessage;
                    e.xclient.message_type = ATOM(WM_CHANGE_STATE);
                    e.xclient.display = X11->display;
                    e.xclient.window = data->winid;
                    e.xclient.format = 32;
                    e.xclient.data.l[0] = IconicState;
                    e.xclient.data.l[1] = 0;
                    e.xclient.data.l[2] = 0;
                    e.xclient.data.l[3] = 0;
                    e.xclient.data.l[4] = 0;
                    XSendEvent(X11->display,
                               RootWindow(X11->display,d->xinfo.screen()),
                               False, (SubstructureNotifyMask|SubstructureRedirectMask), &e);
                } else {
                    setAttribute(Qt::WA_Mapped);
                    XMapWindow(X11->display, internalWinId());
                }
            }

            needShow = false;
        }
    }

    data->window_state = newstate;

    if (needShow)
        show();

    if (newstate & Qt::WindowActive)
        activateWindow();

    QWindowStateChangeEvent e(oldstate);
    QApplication::sendEvent(this, &e);
}

/*!
  \internal
  Platform-specific part of QWidget::show().
*/

void QWidgetPrivate::show_sys()
{
    Q_Q(QWidget);
    Q_ASSERT(q->testAttribute(Qt::WA_WState_Created));
    if (q->isWindow()) {
        XWMHints *h = XGetWMHints(X11->display, q->internalWinId());
        XWMHints  wm_hints;
        bool got_hints = h != 0;
        if (!got_hints) {
            h = &wm_hints;
            h->flags = 0;
        }
        h->initial_state = q->isMinimized() ? IconicState : NormalState;
        h->flags |= StateHint;
        XSetWMHints(X11->display, q->internalWinId(), h);
        if (got_hints)
            XFree((char *)h);

        // update WM_NORMAL_HINTS
        do_size_hints(q, extra);

        // udpate WM_TRANSIENT_FOR
        if (isTransient(q)) {
            QWidget *p = q->parentWidget();
            if (p)
                p = p->window();
            if (p) {
                // transient for window
                XSetTransientForHint(X11->display, q->internalWinId(), p->internalWinId());
            } else {
                // transient for group
                XSetTransientForHint(X11->display, q->internalWinId(), X11->wm_client_leader);
            }
        }

        // update _MOTIF_WM_HINTS
        QtMWMHints mwmhints = GetMWMHints(X11->display, q->internalWinId());

        if (data.window_modality != Qt::NonModal) {
            switch (data.window_modality) {
            case Qt::WindowModal:
                mwmhints.input_mode = MWM_INPUT_PRIMARY_APPLICATION_MODAL;
                break;
            case Qt::ApplicationModal:
            default:
                mwmhints.input_mode = MWM_INPUT_FULL_APPLICATION_MODAL;
                break;
            }
            mwmhints.flags |= MWM_HINTS_INPUT_MODE;
        } else {
            mwmhints.input_mode = MWM_INPUT_MODELESS;
            mwmhints.flags &= ~MWM_HINTS_INPUT_MODE;
        }

        if (q->minimumSize() == q->maximumSize()) {
            // fixed size, remove the resize handle (since mwm/dtwm
            // isn't smart enough to do it itself)
            mwmhints.flags |= MWM_HINTS_FUNCTIONS;
            if (mwmhints.functions == MWM_FUNC_ALL) {
                mwmhints.functions = (MWM_FUNC_MOVE
                                      | MWM_FUNC_MINIMIZE
                                      | MWM_FUNC_MAXIMIZE
                                      | MWM_FUNC_CLOSE);
            } else {
                mwmhints.functions &= ~MWM_FUNC_RESIZE;
            }

            mwmhints.flags |= MWM_HINTS_DECORATIONS;
            if (mwmhints.decorations == MWM_DECOR_ALL) {
                mwmhints.decorations = (MWM_DECOR_BORDER
                                        | MWM_DECOR_TITLE
                                        | MWM_DECOR_MENU
                                        | MWM_DECOR_MINIMIZE
                                        | MWM_DECOR_MAXIMIZE);
            } else {
                mwmhints.decorations &= ~MWM_DECOR_RESIZEH;
            }
        }

        SetMWMHints(X11->display, q->internalWinId(), mwmhints);

        // update _NET_WM_STATE
        QVector<Atom> netWmState = getNetWmState(q);

        Qt::WindowFlags flags = q->windowFlags();
        if (flags & Qt::WindowStaysOnTopHint) {
            netWmState.append(ATOM(_NET_WM_STATE_ABOVE));
            netWmState.append(ATOM(_NET_WM_STATE_STAYS_ON_TOP));
        }
        if (q->isFullScreen()) {
            netWmState.append(ATOM(_NET_WM_STATE_FULLSCREEN));
        }
        if (q->isMaximized()) {
            netWmState.append(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ));
            netWmState.append(ATOM(_NET_WM_STATE_MAXIMIZED_VERT));
        }
        if (data.window_modality != Qt::NonModal) {
            netWmState.append(ATOM(_NET_WM_STATE_MODAL));
        }

        if (!netWmState.isEmpty()) {
            XChangeProperty(X11->display, q->internalWinId(),
                            ATOM(_NET_WM_STATE), XA_ATOM, 32, PropModeReplace,
                            (unsigned char *) netWmState.data(), netWmState.size());
        } else {
            XDeleteProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_STATE));
        }

        // set _NET_WM_USER_TIME
        if (X11->userTime != CurrentTime) {
            XChangeProperty(X11->display, q->internalWinId(), ATOM(_NET_WM_USER_TIME), XA_CARDINAL,
                            32, PropModeReplace, (unsigned char *) &X11->userTime, 1);
        }

        if (!topData()->embedded
            && (topData()->validWMState || topData()->waitingForMapNotify)
            && !q->isMinimized()) {
            X11->deferred_map.append(q);
            return;
        }

        if (q->isMaximized() && !q->isFullScreen()
            && !(X11->isSupportedByWM(ATOM(_NET_WM_STATE_MAXIMIZED_HORZ))
                 && X11->isSupportedByWM(ATOM(_NET_WM_STATE_MAXIMIZED_VERT)))) {
            XMapWindow(X11->display, q->internalWinId());
            data.fstrut_dirty = true;
            qt_x11_wait_for_window_manager(q);

            // if the wm was not smart enough to adjust our size, do that manually
            QRect maxRect = QApplication::desktop()->availableGeometry(q);

            QTLWExtra *top = topData();
            QRect normalRect = top->normalGeometry;
            const QRect fs = frameStrut();

            q->setGeometry(maxRect.x() + fs.left(),
                           maxRect.y() + fs.top(),
                           maxRect.width() - fs.left() - fs.right(),
                           maxRect.height() - fs.top() - fs.bottom());

            // restore the original normalGeometry
            top->normalGeometry = normalRect;
            // internalSetGeometry() clears the maximized flag... make sure we set it back
            data.window_state = data.window_state | Qt::WindowMaximized;
            q->setAttribute(Qt::WA_Mapped);
            return;
        }

        if (q->isFullScreen() && !X11->isSupportedByWM(ATOM(_NET_WM_STATE_FULLSCREEN))) {
            XMapWindow(X11->display, q->internalWinId());
            qt_x11_wait_for_window_manager(q);
            q->setAttribute(Qt::WA_Mapped);
            return;
        }
    }

    invalidateBuffer(q->rect());

    if (q->testAttribute(Qt::WA_OutsideWSRange))
        return;
    q->setAttribute(Qt::WA_Mapped);
    if (q->isWindow())
        topData()->waitingForMapNotify = 1;

    if (!q->isWindow()
        && (!q->autoFillBackground()
            || q->palette().brush(q->backgroundRole()).style() == Qt::LinearGradientPattern)) {
        XSetWindowBackgroundPixmap(X11->display, q->internalWinId(), XNone);
        XMapWindow(X11->display, q->internalWinId());
        updateSystemBackground();
        return;
    }
    XMapWindow(X11->display, q->internalWinId());

    // Freedesktop.org Startup Notification
    if (X11->startupId && q->isWindow()) {
        QByteArray message("remove: ID=");
        message.append(X11->startupId);
        sendStartupMessage(message.constData());
        X11->startupId = 0;
    }
}

/*!
  \internal
  Platform-specific part of QWidget::show().
*/

void QWidgetPrivate::sendStartupMessage(const char *message) const
{
    Q_Q(const QWidget);

    if (!message)
        return;

    XEvent xevent;
    xevent.xclient.type = ClientMessage;
    xevent.xclient.message_type = ATOM(_NET_STARTUP_INFO_BEGIN);
    xevent.xclient.display = X11->display;
    xevent.xclient.window = q->internalWin