qdesigner_menubar.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of
** this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#include "qdesigner_menubar_p.h"
#include "qdesigner_menu_p.h"
#include "qdesigner_toolbar_p.h"
#include "qdesigner_command_p.h"
#include "actionrepository_p.h"
#include "actionprovider_p.h"
#include "actioneditor_p.h"
#include "qdesigner_utils_p.h"

#include <QtDesigner/QtDesigner>

#include <QtCore/QTimer>
#include <QtCore/qdebug.h>

#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QMenu>
#include <QtGui/QToolButton>
#include <QtGui/QDrag>
#include <QtGui/QLayout>
#include <QtGui/QLineEdit>
#include <QtGui/QPainter>
#include <QtGui/qevent.h>

Q_DECLARE_METATYPE(QAction*)
Q_DECLARE_METATYPE(QListWidgetItem*)

using namespace qdesigner_internal;

namespace qdesigner_internal
{

/////////////////////////////////////////////////////////////////////////////////////////////////////////
SpecialMenuAction::SpecialMenuAction(QObject *parent)
    : QAction(parent)
{
}

SpecialMenuAction::~SpecialMenuAction()
{
}


} // namespace qdesigner_internal


/////////////////////////////////////////////////////////////////////////////////////////////////////////
QDesignerMenuBar::QDesignerMenuBar(QWidget *parent)
    : QMenuBar(parent),
      m_interactive(true)
{
    m_currentIndex = 0;
    m_lastMenuActionIndex = -1;
    m_dragging = false;

    setContextMenuPolicy(Qt::DefaultContextMenu);

    setAcceptDrops(true); // ### fake

    m_addMenu = new SpecialMenuAction(this);
    m_addMenu->setText(tr("Type Here"));
    addAction(m_addMenu);

    QFont italic;
    italic.setItalic(true);
    m_addMenu->setFont(italic);

    m_editor = new QLineEdit(this);
    m_editor->setObjectName("__qt__passive_editor");
    m_editor->hide();
    m_editor->installEventFilter(this);

    qApp->installEventFilter(this);
}

QDesignerMenuBar::~QDesignerMenuBar()
{
}

void QDesignerMenuBar::paintEvent(QPaintEvent *event)
{
    QMenuBar::paintEvent(event);

    QPainter p(this);

    foreach (QAction *a, actions()) {
        if (qobject_cast<SpecialMenuAction*>(a)) {
            QRect g = actionGeometry(a);
            QLinearGradient lg(g.left(), g.top(), g.left(), g.bottom());
            lg.setColorAt(0.0, Qt::transparent);
            lg.setColorAt(0.7, QColor(0, 0, 0, 32));
            lg.setColorAt(1.0, Qt::transparent);

            p.fillRect(g, lg);
        }
    }

    QAction *action = currentAction();

    if (m_dragging || !action)
        return;

    if (hasFocus()) {
        QRect g = actionGeometry(action);
        QDesignerMenu::drawSelection(&p, g.adjusted(1, 1, -1, -1));
    } else if (action->menu() && action->menu()->isVisible()) {
        QRect g = actionGeometry(action);
        p.drawRect(g.adjusted(1, 1, -1, -1));
    }
}

bool QDesignerMenuBar::handleEvent(QWidget *widget, QEvent *event)
{
    if (!formWindow())
        return false;

    if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut)
        update();

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

        case QEvent::MouseButtonDblClick:
            return handleMouseDoubleClickEvent(widget, static_cast<QMouseEvent*>(event));
        case QEvent::MouseButtonPress:
            return handleMousePressEvent(widget, static_cast<QMouseEvent*>(event));
        case QEvent::MouseButtonRelease:
            return handleMouseReleaseEvent(widget, static_cast<QMouseEvent*>(event));
        case QEvent::MouseMove:
            return handleMouseMoveEvent(widget, static_cast<QMouseEvent*>(event));
        case QEvent::ContextMenu:
            return handleContextMenuEvent(widget, static_cast<QContextMenuEvent*>(event));
        case QEvent::KeyPress:
            return handleKeyPressEvent(widget, static_cast<QKeyEvent*>(event));
        case QEvent::FocusIn:
        case QEvent::FocusOut:
            return widget != m_editor;
    }

    return true;
}

bool QDesignerMenuBar::handleMouseDoubleClickEvent(QWidget *, QMouseEvent *event)
{
    if (!rect().contains(event->pos()))
        return true;

    if ((event->buttons() & Qt::LeftButton) != Qt::LeftButton)
        return true;

    event->accept();

    m_startPosition = QPoint();

    m_currentIndex = actionAtPosition(event->pos());
    if (m_currentIndex != -1) {
        showLineEdit();
    }

    return true;
}

bool QDesignerMenuBar::handleKeyPressEvent(QWidget *, QKeyEvent *e)
{
    if (m_editor->isHidden()) { // In navigation mode
        switch (e->key()) {

        case Qt::Key_Delete:
            if (m_currentIndex == -1 || m_currentIndex >= realActionCount())
                break;
            hideMenu();
            deleteMenu();
            break;

        case Qt::Key_Left:
            e->accept();
            moveLeft(e->modifiers() & Qt::ControlModifier);
            return true;

        case Qt::Key_Right:
            e->accept();
            moveRight(e->modifiers() & Qt::ControlModifier);
            return true; // no update

        case Qt::Key_Up:
            e->accept();
            moveUp();
            return true;

        case Qt::Key_Down:
            e->accept();
            moveDown();
            return true;

        case Qt::Key_PageUp:
            m_currentIndex = 0;
            break;

        case Qt::Key_PageDown:
            m_currentIndex = actions().count() - 1;
            break;

        case Qt::Key_Enter:
        case Qt::Key_Return:
            e->accept();
            enterEditMode();
            return true; // no update

        case Qt::Key_Alt:
        case Qt::Key_Shift:
        case Qt::Key_Control:
        case Qt::Key_Escape:
            e->ignore();
            setFocus(); // FIXME: this is because some other widget get the focus when CTRL is pressed
            return true; // no update

        default:
            if (!e->text().isEmpty() && e->text().at(0).toLatin1() >= 32) {
                showLineEdit();
                QApplication::sendEvent(m_editor, e);
                e->accept();
            } else {
                e->ignore();
            }
            return true;
        }
    } else { // In edit mode
        switch (e->key()) {
        default:
            return false;

        case Qt::Key_Control:
            e->ignore();
            return true;

        case Qt::Key_Enter:
        case Qt::Key_Return:
            if (!m_editor->text().isEmpty()) {
                leaveEditMode(ForceAccept);
                if (m_lastFocusWidget)
                    m_lastFocusWidget->setFocus();

                m_editor->hide();
                showMenu();
                break;
            }
            // fall through

        case Qt::Key_Escape:
            update();
            setFocus();
            break;
        }
    }

    e->accept();
    update();

    return true;
}

void QDesignerMenuBar::startDrag(const QPoint &pos)
{
    int index = findAction(pos);
    if (m_currentIndex == -1 || index >= realActionCount())
        return;

    QAction *action = safeActionAt(index);

    RemoveActionFromCommand *cmd = new RemoveActionFromCommand(formWindow());
    cmd->init(this, action, actions().at(index + 1));
    formWindow()->commandHistory()->push(cmd);

    adjustSize();

    hideMenu(index);

    QDrag *drag = new QDrag(this);
    drag->setPixmap(action->icon().pixmap(QSize(22, 22)));

    ActionRepositoryMimeData *data = new ActionRepositoryMimeData();
    data->items.append(action);
    drag->setMimeData(data);

    int old_index = m_currentIndex;
    m_currentIndex = -1;

    if (drag->start() == Qt::IgnoreAction) {
        InsertActionIntoCommand *cmd = new InsertActionIntoCommand(formWindow());
        cmd->init(this, action, safeActionAt(index));
        formWindow()->commandHistory()->push(cmd);

        m_currentIndex = old_index;
        adjustSize();
    }
}

bool QDesignerMenuBar::handleMousePressEvent(QWidget *, QMouseEvent *event)
{
    m_startPosition = QPoint();
    event->accept();

    if (event->button() != Qt::LeftButton)
        return true;

    m_startPosition = event->pos();
    m_currentIndex = actionAtPosition(m_startPosition);
    update();

    return true;
}

bool QDesignerMenuBar::handleMouseReleaseEvent(QWidget *, QMouseEvent *event)
{
    m_startPosition = QPoint();

    if (event->button() != Qt::LeftButton)
        return true;

    event->accept();
    m_currentIndex = actionAtPosition(event->pos());
    if (!m_editor->isVisible() && m_currentIndex != -1 && m_currentIndex < realActionCount())
        showMenu();

    return true;
}

bool QDesignerMenuBar::handleMouseMoveEvent(QWidget *, QMouseEvent *event)
{
    if ((event->buttons() & Qt::LeftButton) != Qt::LeftButton)
        return true;

    if (m_startPosition.isNull())
        return true;

    QPoint pos = mapFromGlobal(event->globalPos());

    if ((pos - m_startPosition).manhattanLength() < qApp->startDragDistance())
        return true;

    int index = actionAtPosition(m_startPosition);
    if (index < actions().count()) {
        hideMenu(index);
        update();
    }

    startDrag(m_startPosition);
    m_startPosition = QPoint();

    return true;
}

bool QDesignerMenuBar::handleContextMenuEvent(QWidget *, QContextMenuEvent *event)
{
    event->accept();

    m_currentIndex = actionAtPosition(mapFromGlobal(event->globalPos()));
    QAction *action = safeActionAt(m_currentIndex);

    update();

    QMenu menu(this);

    if (action && !qobject_cast<SpecialMenuAction*>(action)) {
        QVariant itemData;
        qVariantSetValue(itemData, action);

        QAction *remove_action = menu.addAction(tr("Remove Menu '%1'").arg(action->menu()->objectName()));
        remove_action->setData(itemData);
        connect(remove_action, SIGNAL(triggered()), this, SLOT(slotRemoveSelectedAction()));

        menu.addSeparator();
    }

    QAction *remove_menubar = menu.addAction(tr("Remove Menu Bar"));
    connect(remove_menubar, SIGNAL(triggered()), this, SLOT(slotRemoveMenuBar()));

    menu.exec(event->globalPos());

    return true;
}

void QDesignerMenuBar::slotRemoveMenuBar()
{
    Q_ASSERT(formWindow() != 0);

    QDesignerFormWindowInterface *fw = formWindow();

    DeleteMenuBarCommand *cmd = new DeleteMenuBarCommand(fw);
    cmd->init(this);
    fw->commandHistory()->push(cmd);
}

void QDesignerMenuBar::slotRemoveSelectedAction()
{
    QAction *action = qobject_cast<QAction*>(sender());
    if (!action)
        return;

    QAction *a = qvariant_cast<QAction*>(action->data());
    if (qobject_cast<SpecialMenuAction*>(a))
        return; // nothing to do

    int pos = actions().indexOf(a);
    QAction *action_before = 0;
    if (pos != -1)
        action_before = safeActionAt(pos + 1);

    RemoveActionFromCommand *cmd = new RemoveActionFromCommand(formWindow());
    cmd->init(this, a, action_before);
    formWindow()->commandHistory()->push(cmd);
}

void QDesignerMenuBar::focusOutEvent(QFocusEvent *event)
{
    QMenuBar::focusOutEvent(event);
}

QAction *QDesignerMenuBar::createAction(const QString &name)
{
    Q_ASSERT(formWindow() != 0);

    QDesignerFormWindowInterface *fw = formWindow();
    QDesignerFormEditorInterface *core = fw->core();
    QMenu *menu = qobject_cast<QMenu*>(core->widgetFactory()->createWidget("QMenu", this));
    core->widgetFactory()->initialize(menu);
    menu->setObjectName(name);
    menu->setTitle(tr("Menu"));
    fw->ensureUniqueObjectName(menu);

    QAction *menuAction = menu->menuAction();

    AddMenuActionCommand *cmd = new AddMenuActionCommand(formWindow());
    cmd->init(menuAction, this);
    formWindow()->commandHistory()->push(cmd);

    return menuAction;
}


void QDesignerMenuBar::enterEditMode()
{
    if (m_currentIndex >= 0 && m_currentIndex <= realActionCount()) {
        showLineEdit();