qdesigner_menubar.cpp

来自「奇趣公司比较新的qt/emd版本」· C++ 代码 · 共 953 行 · 第 1/2 页

        action = menu->menuAction();
        AddMenuActionCommand *cmd = new AddMenuActionCommand(fw);
        cmd->init(action, m_addMenu, this, this);
        fw->commandHistory()->push(cmd);
    }

    SetPropertyCommand *cmd = new SetPropertyCommand(fw);
    cmd->init(action, QLatin1String("text"), m_editor->text());
    fw->commandHistory()->push(cmd);
    fw->endCommand();
}

void QDesignerMenuBar::showLineEdit()
{
    QAction *action = 0;

    if (m_currentIndex >= 0 && m_currentIndex < realActionCount())
        action = safeActionAt(m_currentIndex);
    else
        action = m_addMenu;

    if (action->isSeparator())
        return;

    // hideMenu();

    m_lastFocusWidget = qApp->focusWidget();

    // open edit field for item name
    const QString text = action != m_addMenu ? action->text() : QString();

    m_editor->setText(text);
    m_editor->selectAll();
    m_editor->setGeometry(actionGeometry(action));
    m_editor->show();
    qApp->setActiveWindow(m_editor);
    m_editor->setFocus();
    m_editor->grabKeyboard();
}

bool QDesignerMenuBar::eventFilter(QObject *object, QEvent *event)
{
    if (object != this && object != m_editor)
        return false;

    if (!m_editor->isHidden() && object == m_editor && event->type() == QEvent::FocusOut) {
        leaveEditMode(Default);
        m_editor->hide();
        update();
        return true;
    }

    bool dispatch = true;

    switch (event->type()) {
        default: break;

        case QEvent::KeyPress:
        case QEvent::KeyRelease:
        case QEvent::ContextMenu:
        case QEvent::MouseMove:
        case QEvent::MouseButtonPress:
        case QEvent::MouseButtonRelease:
        case QEvent::MouseButtonDblClick:
            dispatch = (object != m_editor);
            // no break

        case QEvent::Enter:
        case QEvent::Leave:
        case QEvent::FocusIn:
        case QEvent::FocusOut:
        {
            QWidget *widget = qobject_cast<QWidget*>(object);

            if (dispatch && widget && (widget == this || isAncestorOf(widget)))
                return handleEvent(widget, event);
        } break;

        case QEvent::Shortcut:
            event->accept();
            return true;
    }

    return false;
};


int QDesignerMenuBar::actionAtPosition(const QPoint &pos) const
{
    QList<QAction*> lst = actions();
    int index = 0;
    for (; index<lst.count(); ++index) {
        QRect g = actionGeometry(lst.at(index));
        if (QApplication::layoutDirection() == Qt::LeftToRight)
            g.setTopLeft(QPoint(0, 0));
        else
            g.setTopRight(QPoint(rect().width(), 0));

        if (g.contains(pos))
            return index;
    }

    return -1;
}


int QDesignerMenuBar::findAction(const QPoint &pos) const
{
    const int index = actionAtPosition(pos);
    if (index == -1)
        return realActionCount();

    return index;
}

void QDesignerMenuBar::adjustIndicator(const QPoint &pos)
{
    const int index = findAction(pos);
    QAction *action = safeActionAt(index);
    Q_ASSERT(action != 0);

    if (pos != QPoint(-1, -1)) {
        QDesignerMenu *m = qobject_cast<QDesignerMenu*>(action->menu());
        if (!m || m->parentMenu()) {
            m_currentIndex = index;
            showMenu(index);
        }
    }

    if (QDesignerActionProviderExtension *a = actionProvider()) {
        a->adjustIndicator(pos);
    }
}

QDesignerMenuBar::ActionDragCheck QDesignerMenuBar::checkAction(QAction *action) const
{
    // action belongs to another form
    if (!action || !Utils::isObjectAncestorOf(formWindow()->mainContainer(), action))
        return NoActionDrag;

    if (!action->menu())
        return ActionDragOnSubMenu; // simple action only on sub menus

    QDesignerMenu *m = qobject_cast<QDesignerMenu*>(action->menu());
    if (m && m->parentMenu())
        return ActionDragOnSubMenu; // it looks like a submenu

    if (actions().contains(action))
        return ActionDragOnSubMenu; // we already have the action in the menubar

    return AcceptActionDrag;
}

void QDesignerMenuBar::dragEnterEvent(QDragEnterEvent *event)
{
    const ActionRepositoryMimeData *d = qobject_cast<const ActionRepositoryMimeData*>(event->mimeData());
    if (!d || d->actionList().empty()) {
        event->ignore();
        return;
    }

    QAction *action = d->actionList().first();
    switch (checkAction(action)) {
    case NoActionDrag:
        event->ignore();
        break;
    case ActionDragOnSubMenu:
        m_dragging = true;
        d->accept(event);
        break;
    case AcceptActionDrag:
        m_dragging = true;
        d->accept(event);
        adjustIndicator(event->pos());
        break;
    }
}

void QDesignerMenuBar::dragMoveEvent(QDragMoveEvent *event)
{
    const ActionRepositoryMimeData *d = qobject_cast<const ActionRepositoryMimeData*>(event->mimeData());
    if (!d || d->actionList().empty()) {
        event->ignore();
        return;
    }
    QAction *action = d->actionList().first();

    switch (checkAction(action)) {
    case NoActionDrag:
        event->ignore();
        break;
    case ActionDragOnSubMenu:
        event->ignore();
        showMenu(findAction(event->pos()));
        break;
    case AcceptActionDrag:
        d->accept(event);
        adjustIndicator(event->pos());
        break;
    }
}

void QDesignerMenuBar::dragLeaveEvent(QDragLeaveEvent *)
{
    m_dragging = false;

    adjustIndicator(QPoint(-1, -1));
}

void QDesignerMenuBar::dropEvent(QDropEvent *event)
{
    m_dragging = false;

    if (const ActionRepositoryMimeData *d = qobject_cast<const ActionRepositoryMimeData*>(event->mimeData())) {

        QAction *action = d->actionList().first();
        if (checkAction(action) == AcceptActionDrag) {
            event->acceptProposedAction();
            int index = findAction(event->pos());
            index = qMin(index, actions().count() - 1);

            QDesignerFormWindowInterface *fw = formWindow();
            InsertActionIntoCommand *cmd = new InsertActionIntoCommand(fw);
            cmd->init(this, action, safeActionAt(index));
            fw->commandHistory()->push(cmd);

            m_currentIndex = index;
            update();
            adjustIndicator(QPoint(-1, -1));
            return;
        }
    }
    event->ignore();
}

void QDesignerMenuBar::actionEvent(QActionEvent *event)
{
    QMenuBar::actionEvent(event);
}

QDesignerFormWindowInterface *QDesignerMenuBar::formWindow() const
{
    return QDesignerFormWindowInterface::findFormWindow(const_cast<QDesignerMenuBar*>(this));
}

QDesignerActionProviderExtension *QDesignerMenuBar::actionProvider()
{
    if (QDesignerFormWindowInterface *fw = formWindow()) {
        QDesignerFormEditorInterface *core = fw->core();
        return qt_extension<QDesignerActionProviderExtension*>(core->extensionManager(), this);
    }

    return 0;
}

QAction *QDesignerMenuBar::currentAction() const
{
    if (m_currentIndex < 0 || m_currentIndex >= actions().count())
        return 0;

    return safeActionAt(m_currentIndex);
}

int QDesignerMenuBar::realActionCount() const
{
    return actions().count() - 1; // 1 fake actions
}

void QDesignerMenuBar::moveLeft(bool ctrl)
{
    if (ctrl)
        (void) swap(m_currentIndex, m_currentIndex - 1);

    m_currentIndex = qMax(0, --m_currentIndex);
    // Always re-select, swapping destroys order
    updateCurrentAction(true);
}

bool QDesignerMenuBar::dragging() const
{
    return m_dragging;
}

void QDesignerMenuBar::moveRight(bool ctrl)
{
    if (ctrl)
        (void) swap(m_currentIndex + 1, m_currentIndex);

    m_currentIndex = qMin(actions().count() - 1, ++m_currentIndex);
    updateCurrentAction(!ctrl);
}

void QDesignerMenuBar::moveUp()
{
    update();
}

void QDesignerMenuBar::moveDown()
{
    showMenu();
}

void QDesignerMenuBar::adjustSpecialActions()
{
    removeAction(m_addMenu);
    addAction(m_addMenu);
}

bool QDesignerMenuBar::interactive(bool i)
{
    const bool old = m_interactive;
    m_interactive = i;
    return old;
}

void QDesignerMenuBar::hideMenu(int index)
{
    if (index < 0 && m_currentIndex >= 0)
        index = m_currentIndex;

    if (index < 0 || index >= realActionCount())
        return;

    QAction *action = safeActionAt(index);

    if (action && action->menu()) {
        action->menu()->hide();

        if (QDesignerMenu *menu = qobject_cast<QDesignerMenu*>(action->menu())) {
            menu->closeMenuChain();
        }
    }
}

void QDesignerMenuBar::deleteMenu()
{
    QAction *action = currentAction();

    if (action && !qobject_cast<SpecialMenuAction*>(action)) {
        const int pos = actions().indexOf(action);
        QAction *action_before = 0;
        if (pos != -1)
            action_before = safeActionAt(pos + 1);

        QDesignerFormWindowInterface *fw = formWindow();
        RemoveMenuActionCommand *cmd = new RemoveMenuActionCommand(fw);
        cmd->init(action, action_before, this, this);
        fw->commandHistory()->push(cmd);
    }
}

void QDesignerMenuBar::showMenu(int index)
{
    if (index < 0 && m_currentIndex >= 0)
        index = m_currentIndex;

    if (index < 0 || index >= realActionCount())
        return;

    m_currentIndex = index;
    QAction *action = currentAction();

    if (action && action->menu()) {
        if (m_lastMenuActionIndex != -1 && m_lastMenuActionIndex != index) {
            hideMenu(m_lastMenuActionIndex);
        }

        m_lastMenuActionIndex = index;
        QMenu *menu = action->menu();
        const QRect g = actionGeometry(action);

        if (!menu->isVisible()) {
            if ((menu->windowFlags() & Qt::Popup) != Qt::Popup)
                menu->setWindowFlags(Qt::Popup);
            menu->adjustSize();
            menu->move(mapToGlobal(g.bottomLeft()));
            menu->setFocus(Qt::MouseFocusReason);
            menu->raise();
            menu->show();
        } else {
            menu->raise();
        }
    }
}

QAction *QDesignerMenuBar::safeActionAt(int index) const
{
    if (index < 0 || index >= actions().count())
        return 0;

    return actions().at(index);
}

bool QDesignerMenuBar::swap(int a, int b)
{
    const int left = qMin(a, b);
    int right = qMax(a, b);

    QAction *action_a = safeActionAt(left);
    QAction *action_b = safeActionAt(right);

    if (action_a == action_b
            || !action_a
            || !action_b
            || qobject_cast<SpecialMenuAction*>(action_a)
            || qobject_cast<SpecialMenuAction*>(action_b))
        return false; // nothing to do

    right = qMin(right, realActionCount());
    if (right < 0)
        return false; // nothing to do

    formWindow()->beginCommand(QApplication::translate("Command", "Move action"));

    QAction *action_b_before = safeActionAt(right + 1);

    QDesignerFormWindowInterface *fw = formWindow();
    RemoveActionFromCommand *cmd1 = new RemoveActionFromCommand(fw);
    cmd1->init(this, action_b, action_b_before, false);
    fw->commandHistory()->push(cmd1);

    QAction *action_a_before = safeActionAt(left + 1);

    InsertActionIntoCommand *cmd2 = new InsertActionIntoCommand(fw);
    cmd2->init(this, action_b, action_a_before, false);
    fw->commandHistory()->push(cmd2);

    RemoveActionFromCommand *cmd3 = new RemoveActionFromCommand(fw);
    cmd3->init(this, action_a, action_b, false);
    fw->commandHistory()->push(cmd3);

    InsertActionIntoCommand *cmd4 = new InsertActionIntoCommand(fw);
    cmd4->init(this, action_a, action_b_before, true);
    fw->commandHistory()->push(cmd4);

    fw->endCommand();

    return true;
}

void QDesignerMenuBar::keyPressEvent(QKeyEvent *event)
{
    event->ignore();
}

void QDesignerMenuBar::keyReleaseEvent(QKeyEvent *event)
{
    event->ignore();
}

void QDesignerMenuBar::updateCurrentAction(bool selectAction)
{
    update();

    if (!selectAction)
        return;

    QAction *action = currentAction();
    if (!action || action == m_addMenu)
        return;

    QMenu *menu = action->menu();
    if (!menu)
        return;

    QDesignerObjectInspector *oi = 0;
    if (QDesignerFormWindowInterface *fw = formWindow())
        oi = qobject_cast<QDesignerObjectInspector *>(fw->core()->objectInspector());

    if (!oi)
        return;

    oi->clearSelection();
    oi->selectObject(menu);
}