qmdisubwindow.cpp

奇趣公司比较新的qt/emd版本

    isInInteractiveMode = true;
    q->setFocus();
#ifndef QT_NO_RUBBERBAND
    if ((q->testOption(QMdiSubWindow::RubberBandResize)
            && (currentOperation == BottomRightResize || currentOperation == BottomLeftResize))
            || (q->testOption(QMdiSubWindow::RubberBandMove) && currentOperation == Move)) {
        enterRubberBandMode();
    } else
#endif // QT_NO_RUBBERBAND
    {
        q->grabMouse();
    }
#endif // QT_NO_ACTION
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::_q_processFocusChanged(QWidget *old, QWidget *now)
{
    Q_UNUSED(old);
    Q_Q(QMdiSubWindow);
    if (now && (now == q || q->isAncestorOf(now))) {
        if (now == q && !isInInteractiveMode)
            setFocusWidget();
        setActive(true);
    }
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::leaveInteractiveMode()
{
    Q_Q(QMdiSubWindow);
#ifndef QT_NO_RUBBERBAND
    if (isInRubberBandMode)
        leaveRubberBandMode();
    else
#endif
        q->releaseMouse();
    isInInteractiveMode = false;
    currentOperation = None;
    updateDirtyRegions();
    updateCursor();
    if (baseWidget && baseWidget->focusWidget())
        baseWidget->focusWidget()->setFocus();
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::removeBaseWidget()
{
    if (!baseWidget)
        return;

    Q_Q(QMdiSubWindow);
    q->removeEventFilter(baseWidget);
    if (QLayout *layout = q->layout())
        layout->removeWidget(baseWidget);
    if (baseWidget->windowTitle() == q->windowTitle()) {
        ignoreWindowTitleChange = true;
        q->setWindowTitle(QString());
        ignoreWindowTitleChange = false;
        q->setWindowModified(false);
    }
    lastChildWindowTitle.clear();
    baseWidget->setParent(0);
    baseWidget = 0;
    isWidgetHiddenByUs = false;
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::initOperationMap()
{
    operationMap.insert(Move, OperationInfo(HMove | VMove, Qt::ArrowCursor, false));
    operationMap.insert(TopResize, OperationInfo(VMove | VResize | VResizeReverse, Qt::SizeVerCursor));
    operationMap.insert(BottomResize, OperationInfo(VResize, Qt::SizeVerCursor));
    operationMap.insert(LeftResize, OperationInfo(HMove | HResize | HResizeReverse, Qt::SizeHorCursor));
    operationMap.insert(RightResize, OperationInfo(HResize, Qt::SizeHorCursor));
    operationMap.insert(TopLeftResize, OperationInfo(HMove | VMove | HResize | VResize | VResizeReverse
                                                     | HResizeReverse, Qt::SizeFDiagCursor));
    operationMap.insert(TopRightResize, OperationInfo(VMove | HResize | VResize
                                                      | VResizeReverse, Qt::SizeBDiagCursor));
    operationMap.insert(BottomLeftResize, OperationInfo(HMove | HResize | VResize | HResizeReverse,
                                                        Qt::SizeBDiagCursor));
    operationMap.insert(BottomRightResize, OperationInfo(HResize | VResize, Qt::SizeFDiagCursor));
}

#ifndef QT_NO_MENU

/*!
    \internal
*/
void QMdiSubWindowPrivate::createSystemMenu()
{
    Q_Q(QMdiSubWindow);
    Q_ASSERT_X(q, "QMdiSubWindowPrivate::createSystemMenu",
               "You can NOT call this function before QMdiSubWindow's ctor");
    systemMenu = new QMenu(q);
    const QStyle *style = q->style();
    addToSystemMenu(RestoreAction, QMdiSubWindow::tr("&Restore"), SLOT(showNormal()));
    actions[RestoreAction]->setIcon(style->standardIcon(QStyle::SP_TitleBarNormalButton));
    actions[RestoreAction]->setEnabled(false);
    addToSystemMenu(MoveAction, QMdiSubWindow::tr("&Move"), SLOT(_q_enterInteractiveMode()));
    addToSystemMenu(ResizeAction, QMdiSubWindow::tr("&Size"), SLOT(_q_enterInteractiveMode()));
    addToSystemMenu(MinimizeAction, QMdiSubWindow::tr("Mi&nimize"), SLOT(showMinimized()));
    actions[MinimizeAction]->setIcon(style->standardIcon(QStyle::SP_TitleBarMinButton));
    addToSystemMenu(MaximizeAction, QMdiSubWindow::tr("Ma&ximize"), SLOT(showMaximized()));
    actions[MaximizeAction]->setIcon(style->standardIcon(QStyle::SP_TitleBarMaxButton));
    addToSystemMenu(StayOnTopAction, QMdiSubWindow::tr("Stay on &Top"), SLOT(_q_updateStaysOnTopHint()));
    actions[StayOnTopAction]->setCheckable(true);
    systemMenu->addSeparator();
    addToSystemMenu(CloseAction, QMdiSubWindow::tr("&Close"), SLOT(close()));
    actions[CloseAction]->setIcon(style->standardIcon(QStyle::SP_TitleBarCloseButton));
#if !defined(QT_NO_SHORTCUT)
    actions[CloseAction]->setShortcut(QKeySequence::Close);
#endif
    updateActions();
}
#endif

/*!
    \internal
*/
void QMdiSubWindowPrivate::updateCursor()
{
#ifndef QT_NO_CURSOR
    Q_Q(QMdiSubWindow);
#if defined(Q_WS_MAC) && !defined(QT_NO_STYLE_MAC)
    if (qobject_cast<QMacStyle *>(q->style()))
        return;
#endif

    if (currentOperation == None) {
        q->unsetCursor();
        return;
    }

    if (currentOperation == Move || operationMap.find(currentOperation).value().hover) {
        q->setCursor(operationMap.find(currentOperation).value().cursorShape);
        return;
    }
#endif
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::updateDirtyRegions()
{
    // No update necessary
    if (!q_func()->parent())
        return;

    foreach (Operation operation, operationMap.keys())
        operationMap.find(operation).value().region = getRegion(operation);
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::updateGeometryConstraints()
{
    Q_Q(QMdiSubWindow);
    if (!q->parent())
        return;

    internalMinimumSize = q->minimumSizeHint();
    int margin, minWidth;
    sizeParameters(&margin, &minWidth);
    q->setContentsMargins(margin, titleBarHeight(), margin, margin);
    if (q->isMaximized() || (q->isMinimized() && !q->isShaded())) {
        moveEnabled = false;
        resizeEnabled = false;
    } else {
        moveEnabled = true;
        if ((q->windowFlags() & Qt::MSWindowsFixedSizeDialogHint) || q->isShaded())
            resizeEnabled = false;
        else
            resizeEnabled = true;
    }
    updateDirtyRegions();
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::updateMask()
{
    Q_Q(QMdiSubWindow);
    if (!q->mask().isEmpty())
        q->clearMask();

    if (!q->parent())
        return;

    if (q->isMaximized() && !drawTitleBarWhenMaximized()
        || q->windowFlags() & Qt::FramelessWindowHint)
        return;

    if (resizeTimerId == -1)
        cachedStyleOptions = titleBarOptions();
    cachedStyleOptions.rect = q->rect();
    QStyleHintReturnMask frameMask;
    q->style()->styleHint(QStyle::SH_WindowFrame_Mask, &cachedStyleOptions, q, &frameMask);
    if (!frameMask.region.isEmpty())
        q->setMask(frameMask.region);
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::setNewGeometry(const QPoint &pos)
{
    Q_Q(QMdiSubWindow);
    Q_ASSERT(currentOperation != None);
    Q_ASSERT(q->parent());

    uint cflags = operationMap.find(currentOperation).value().changeFlags;
    int posX = pos.x();
    int posY = pos.y();

    const bool restrictHorizontal = !q->testOption(QMdiSubWindow::AllowOutsideAreaHorizontally);
    const bool restrictVertical = !q->testOption(QMdiSubWindow::AllowOutsideAreaVertically);

    if (restrictHorizontal || restrictVertical) {
        QRect parentRect = q->parentWidget()->rect();
        if (restrictVertical && (cflags & VResizeReverse || currentOperation == Move)) {
            posY = qMin(qMax(mousePressPosition.y() - oldGeometry.y(), posY),
                        parentRect.height() - BoundaryMargin);
        }
        if (currentOperation == Move) {
            if (restrictHorizontal)
                posX = qMin(qMax(BoundaryMargin, posX), parentRect.width() - BoundaryMargin);
            if (restrictVertical)
                posY = qMin(posY, parentRect.height() - BoundaryMargin);
        } else {
            if (restrictHorizontal) {
                if (cflags & HResizeReverse)
                    posX = qMax(mousePressPosition.x() - oldGeometry.x(), posX);
                else
                    posX = qMin(parentRect.width() - (oldGeometry.x() + oldGeometry.width()
                                                      - mousePressPosition.x()), posX);
            }
            if (restrictVertical && !(cflags & VResizeReverse)) {
                posY = qMin(parentRect.height() - (oldGeometry.y() + oldGeometry.height()
                                                   - mousePressPosition.y()), posY);
            }
        }
    }

    QRect geometry;
    if (cflags & (HMove | VMove)) {
        int dx = getMoveDeltaComponent(cflags, HMove, HResize, posX - mousePressPosition.x(),
                                       oldGeometry.width() - internalMinimumSize.width(),
                                       oldGeometry.width() - q->maximumWidth());
        int dy = getMoveDeltaComponent(cflags, VMove, VResize, posY - mousePressPosition.y(),
                                       oldGeometry.height() - internalMinimumSize.height(),
                                       oldGeometry.height() - q->maximumHeight());
        geometry.setTopLeft(oldGeometry.topLeft() + QPoint(dx, dy));
    } else {
        geometry.setTopLeft(q->geometry().topLeft());
    }

    if (cflags & (HResize | VResize)) {
        int dx = getResizeDeltaComponent(cflags, HResize, HResizeReverse,
                                         posX - mousePressPosition.x());
        int dy = getResizeDeltaComponent(cflags, VResize, VResizeReverse,
                                         posY - mousePressPosition.y());
        geometry.setSize(oldGeometry.size() + QSize(dx, dy));
    } else {
        geometry.setSize(q->geometry().size());
    }

    setNewGeometry(&geometry);
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::setMinimizeMode()
{
    Q_Q(QMdiSubWindow);
    Q_ASSERT(q->parent());

    ensureWindowState(Qt::WindowMinimized);
    isShadeRequestFromMinimizeMode = true;
    q->showShaded();
    isShadeRequestFromMinimizeMode = false;

    moveEnabled = false;
#ifndef QT_NO_ACTION
    setEnabled(MoveAction, moveEnabled);
#endif

    Q_ASSERT(q->windowState() & Qt::WindowMinimized);
    Q_ASSERT(!(q->windowState() & Qt::WindowMaximized));
    // This should be a valid assert, but people can actually re-implement
    // setVisible and do crazy stuff, so we're not guaranteed that
    // the widget is hidden after calling hide().
    // Q_ASSERT(baseWidget ? baseWidget->isHidden() : true);

    setActive(true);
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::setNormalMode()
{
    Q_Q(QMdiSubWindow);
    Q_ASSERT(q->parent());

    isShadeMode = false;
    isMaximizeMode = false;

    ensureWindowState(Qt::WindowNoState);
#ifndef QT_NO_MENUBAR
    removeButtonsFromMenuBar();
#endif

    // Hide the window before we change the geometry to avoid multiple resize
    // events and wrong window state.
    const bool wasVisible = q->isVisible();
    if (wasVisible)
        q->setVisible(false);

    // Restore minimum size if set by user.
    if (userMinimumSize.isValid()) {
        q->setMinimumSize(userMinimumSize);
        userMinimumSize = QSize(-1, -1);
    }

    // Show the internal widget if it was hidden by us,
    if (baseWidget && isWidgetHiddenByUs) {
        baseWidget->show();
        isWidgetHiddenByUs = false;
    }

    updateGeometryConstraints();
    QRect newGeometry = oldGeometry;
    newGeometry.setSize(restoreSize.expandedTo(internalMinimumSize));
    q->setGeometry(newGeometry);

    if (wasVisible)
        q->setVisible(true);

    // Invalidate the restore size.
    restoreSize.setWidth(-1);
    restoreSize.setHeight(-1);

#ifndef QT_NO_SIZEGRIP
    setSizeGripVisible(true);
#endif

#ifndef QT_NO_ACTION
    setEnabled(MoveAction, true);
    setEnabled(MaximizeAction, true);
    setEnabled(MinimizeAction, true);
    setEnabled(RestoreAction, false);
    setEnabled(ResizeAction, resizeEnabled);
#endif // QT_NO_ACTION

    Q_ASSERT(!(q_func()->windowState() & (Qt::WindowMinimized | Qt::WindowMaximized)));
    Q_ASSERT(!isShadeMode);

    setActive(true);
    restoreFocus();
    updateMask();
}

/*!
    \internal
*/
void QMdiSubWindowPrivate::setMaximizeMode()
{
    Q_Q(QMdiSubWindow);
    Q_ASSERT(q->parent());

    ensureWindowState(Qt::WindowMaximized);
    isShadeMode = false;
    isMaximizeMode = true;

    if (!restoreFocusWidget && q->isAncestorOf(QApplication::focusWidget()))
        restoreFocusWidget = QApplication::focusWidget();

#ifndef QT_NO_SIZEGRIP
    setSizeGripVisible(false);
#endif

    // Store old geometry and set restore size if not already set.
    if (!restoreSize.isValid()) {
        oldGeometry = q->geometry();
        restoreSize.setWidth(oldGeometry.width());
        restoreSize.setHeight(oldGeometry.height());
    }

    // Hide the window before we change the geometry to avoid multiple resize
    // events and wrong window state.
    const bool wasVisible = q->isVisible();
    if (wasVisible)
        q->setVisible(false);

    // Show the internal widget if it was hidden by us.
    if (baseWidget && isWidgetHiddenByUs) {
        baseWidget->show();
        isWidgetHiddenByUs = false;
    }

    updateGeometryConstraints();

    if (!drawTitleBarWhenMaximized() && wasVisible) {
#ifndef QT_NO_MAINWINDOW