qdesigner_menubar.cpp

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#include "qdesigner_menubar_p.h"
#include "qdesigner_menu_p.h"
#include "qdesigner_command_p.h"
#include "qdesigner_propertycommand_p.h"
#include "actionrepository_p.h"
#include "actionprovider_p.h"
#include "actioneditor_p.h"
#include "qdesigner_utils_p.h"
#include "promotiontaskmenu_p.h"
#include "qdesigner_objectinspector_p.h"

#include <QtDesigner/QDesignerFormWindowInterface>
#include <QtDesigner/QDesignerFormEditorInterface>
#include <QtDesigner/QDesignerWidgetFactoryInterface>
#include <QtDesigner/QExtensionManager>

#include <QtCore/QMimeData>

#include <QtCore/qdebug.h>

#include <QtGui/QApplication>
#include <QtGui/QDrag>
#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_addMenu(new SpecialMenuAction(this)),
    m_currentIndex(0),
    m_interactive(true),
    m_editor(new QLineEdit(this)),
    m_dragging(false),
    m_lastMenuActionIndex( -1),
    m_promotionTaskMenu(new PromotionTaskMenu(this, PromotionTaskMenu::ModeSingleWidget, this))
{
    setContextMenuPolicy(Qt::DefaultContextMenu);

    setAcceptDrops(true); // ### fake

    m_addMenu->setText(tr("Type Here"));
    addAction(m_addMenu);

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

    m_editor->setObjectName(QLatin1String("__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)) {
            const 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()) {
        const QRect g = actionGeometry(action);
        QDesignerMenu::drawSelection(&p, g.adjusted(1, 1, -1, -1));
    } else if (action->menu() && action->menu()->isVisible()) {
        const 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();
            if (QApplication::layoutDirection() == Qt::LeftToRight)
                moveLeft(e->modifiers() & Qt::ControlModifier);
            else
                moveRight(e->modifiers() & Qt::ControlModifier);
            return true;

        case Qt::Key_Right:
            e->accept();
            if (QApplication::layoutDirection() == Qt::LeftToRight)
                moveRight(e->modifiers() & Qt::ControlModifier);
            else
                moveLeft(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)
{
    const int index = findAction(pos);
    if (m_currentIndex == -1 || index >= realActionCount())
        return;

    QAction *action = safeActionAt(index);

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

    adjustSize();

    hideMenu(index);

    QDrag *drag = new QDrag(this);
    drag->setPixmap(ActionRepositoryMimeData::actionDragPixmap(action));
    drag->setMimeData(new ActionRepositoryMimeData(action, Qt::MoveAction));

    const int old_index = m_currentIndex;
    m_currentIndex = -1;

    if (drag->start(Qt::MoveAction) == Qt::IgnoreAction) {
        InsertActionIntoCommand *cmd = new InsertActionIntoCommand(fw);
        cmd->init(this, action, safeActionAt(index));
        fw->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();
    const int newIndex = actionAtPosition(m_startPosition);
    const bool changed = newIndex != m_currentIndex;
    m_currentIndex =  newIndex;
    updateCurrentAction(changed);

    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;

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

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

    const 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()));

    update();

    QMenu menu(this);
    if (QAction *action = safeActionAt(m_currentIndex)) {
        if (!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(deleteMenu()));

            menu.addSeparator();
        }
    }

    m_promotionTaskMenu->addActions(formWindow(), PromotionTaskMenu::TrailingSeparator, &menu);

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

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

void QDesignerMenuBar::leaveEditMode(LeaveEditMode mode)
{
    m_editor->releaseKeyboard();

    if (mode == Default)
        return;

    if (m_editor->text().isEmpty())
        return;

    QAction *action = 0;

    QDesignerFormWindowInterface *fw = formWindow();
    Q_ASSERT(fw);

    if (m_currentIndex >= 0 && m_currentIndex < realActionCount()) {
        action = safeActionAt(m_currentIndex);
        fw->beginCommand(QApplication::translate("Command", "Change Title"));
    } else {
        fw->beginCommand(QApplication::translate("Command", "Insert Menu"));
        const QString niceObjectName = ActionEditor::actionTextToName(m_editor->text(), QLatin1String("menu"));
        QMenu *menu = qobject_cast<QMenu*>(fw->core()->widgetFactory()->createWidget(QLatin1String("QMenu"), this));
        fw->core()->widgetFactory()->initialize(menu);
        menu->setObjectName(niceObjectName);
        menu->setTitle(tr("Menu"));
        fw->ensureUniqueObjectName(menu);