qdesigner_menu.cpp

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#include "qdesigner_menu_p.h"
#include "qdesigner_menubar_p.h"
#include "qdesigner_toolbar_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 "qdesigner_objectinspector_p.h"

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

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

#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QLineEdit>
#include <QtGui/QPainter>
#include <QtGui/QRubberBand>
#include <QtGui/QToolTip>
#include <QtGui/QToolBar>
#include <QtGui/qevent.h>

Q_DECLARE_METATYPE(QAction*)
Q_DECLARE_METATYPE(QListWidgetItem*)

using namespace qdesigner_internal;

QDesignerMenu::QDesignerMenu(QWidget *parent) :
    QMenu(parent),
    m_currentIndex(0),
    m_addItem(new SpecialMenuAction(this)),
    m_addSeparator(new SpecialMenuAction(this)),
    m_showSubMenuTimer(new QTimer(this)),
    m_deactivateWindowTimer(new QTimer(this)),
    m_adjustSizeTimer(new QTimer(this)),
    m_editor(new QLineEdit(this)),
    m_dragging(false),
    m_lastSubMenuIndex(-1)
{
    setContextMenuPolicy(Qt::DefaultContextMenu);
    setAcceptDrops(true); // ### fake
    setSeparatorsCollapsible(false);

    connect(m_adjustSizeTimer, SIGNAL(timeout()), this, SLOT(slotAdjustSizeNow()));
    m_addItem->setText(tr("Type Here"));
    addAction(m_addItem);

    m_addSeparator->setText(tr("Add Separator"));
    addAction(m_addSeparator);

    connect(m_showSubMenuTimer, SIGNAL(timeout()), this, SLOT(slotShowSubMenuNow()));

    connect(m_deactivateWindowTimer, SIGNAL(timeout()), this, SLOT(slotDeactivateNow()));

    m_editor->setObjectName(QLatin1String("__qt__passive_editor"));
    m_editor->hide();

    m_editor->installEventFilter(this);
    installEventFilter(this);
}

QDesignerMenu::~QDesignerMenu()
{
}

void QDesignerMenu::slotAdjustSizeNow()
{
    // Not using a single-shot, since we want to compress the timers if many items are being
    // adjusted
    m_adjustSizeTimer->stop();
    adjustSize();
}

bool QDesignerMenu::handleEvent(QWidget *widget, QEvent *event)
{
    if (event->type() == QEvent::FocusIn || event->type() == QEvent::FocusOut) {
        update();

        if (widget == m_editor)
            return false;
    }

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

        case QEvent::MouseButtonPress:
            return handleMousePressEvent(widget, static_cast<QMouseEvent*>(event));
        case QEvent::MouseButtonRelease:
            return handleMouseReleaseEvent(widget, static_cast<QMouseEvent*>(event));
        case QEvent::MouseButtonDblClick:
            return handleMouseDoubleClickEvent(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));
    }

    return true;
}

void QDesignerMenu::startDrag(const QPoint &pos, Qt::KeyboardModifiers modifiers)
{
    const int index = findAction(pos);
    if (index >= realActionCount())
        return;

    QAction *action = safeActionAt(index);

    QDesignerFormWindowInterface *fw = formWindow();
    const Qt::DropAction dropAction = (modifiers & Qt::ControlModifier) ? Qt::CopyAction : Qt::MoveAction;
    if (dropAction == Qt::MoveAction) {
        RemoveActionFromCommand *cmd = new RemoveActionFromCommand(fw);
        cmd->init(this, action, actions().at(index + 1));
        fw->commandHistory()->push(cmd);
    }

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

    const int old_index = m_currentIndex;
    m_currentIndex = -1;

    if (drag->start(dropAction) == Qt::IgnoreAction) {
        if (dropAction == Qt::MoveAction) {
            QAction *previous = safeActionAt(index);
            InsertActionIntoCommand *cmd = new InsertActionIntoCommand(fw);
            cmd->init(this, action, previous);
            fw->commandHistory()->push(cmd);
        }

        m_currentIndex = old_index;
    }
}

bool QDesignerMenu::handleKeyPressEvent(QWidget * /*widget*/, QKeyEvent *e)
{
    m_showSubMenuTimer->stop();

    if (m_editor->isHidden() && hasFocus()) { // In navigation mode
        switch (e->key()) {

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

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

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

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

        case Qt::Key_Down:
            e->accept();
            moveDown(e->modifiers() & Qt::ControlModifier);
            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:
        case Qt::Key_F2:
            e->accept();
            enterEditMode();
            return true; // no update

        case Qt::Key_Escape:
            e->ignore();
            setFocus();
            hide();
            closeMenuChain();
            return true;

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

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

        case Qt::Key_Enter:
        case Qt::Key_Return:
            if (!m_editor->text().isEmpty()) {
                leaveEditMode(ForceAccept);
                m_editor->hide();
                setFocus();
                moveDown(false);
                break;
            }
            // fall through

        case Qt::Key_Escape:
            m_editor->hide();
            setFocus();
            break;
        }
    }

    e->accept();
    update();

    return true;
}

static void sendMouseEventTo(QWidget *target, const QPoint &targetPoint, const QMouseEvent *event)
{
    QMouseEvent e(event->type(), targetPoint, event->globalPos(), event->button(), event->buttons(), event->modifiers());
    QApplication::sendEvent(target, &e);
}

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

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

    if (!rect().contains(event->pos())) {
        // special case for menubar
        QWidget *target = QApplication::widgetAt(event->globalPos());
        QMenuBar *mb = qobject_cast<QMenuBar*>(target);
        QDesignerMenu *menu = qobject_cast<QDesignerMenu*>(target);
        if (mb != 0 || menu != 0) {
            const QPoint pt = target->mapFromGlobal(event->globalPos());
            QAction *action = mb == 0 ? menu->actionAt(pt) : mb->actionAt(pt);
            if (action)
                 sendMouseEventTo(target, pt, event);
        }
        return true;
    }

    m_currentIndex = findAction(event->pos());
    QAction *action = safeActionAt(m_currentIndex);

    QRect pm_rect;
    if (action->menu() || hasSubMenuPixmap(action)) {
        pm_rect = subMenuPixmapRect(action);
        pm_rect.setLeft(pm_rect.left() - 20); // give the user a little more
                                              // space to click
    }

    if (!pm_rect.contains(event->pos()) && m_currentIndex != -1)
        enterEditMode();

    return true;
}

bool QDesignerMenu::handleMousePressEvent(QWidget * /*widget*/, QMouseEvent *event)
{
    if (!rect().contains(event->pos())) {
        QWidget *clickedWidget = QApplication::widgetAt(event->globalPos());
        if (QMenuBar *mb = qobject_cast<QMenuBar*>(clickedWidget)) {
            const QPoint pt = mb->mapFromGlobal(event->globalPos());
            if (QAction *action = mb->actionAt(pt)) {
                QMenu * menu = action->menu();
                if (menu == findRootMenu()) {
                    // propagate the mouse press event (but don't close the popup)
                    sendMouseEventTo(mb, pt, event);
                    return true;
                }
            }
        }

        // hide the popup Qt will replay the event. Try to focus the clicked window.
        slotDeactivateNow();
        if (clickedWidget) {
            if (QWidget *focusProxy = clickedWidget->focusProxy())
                clickedWidget = focusProxy;
            if (clickedWidget->focusPolicy() != Qt::NoFocus)
                clickedWidget->setFocus(Qt::OtherFocusReason);
        }
        return true;
    }

    m_showSubMenuTimer->stop();
    m_startPosition = QPoint();
    event->accept();

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

    m_startPosition = mapFromGlobal(event->globalPos());

    const int index = findAction(m_startPosition);

    QAction *action = safeActionAt(index);
    QRect pm_rect = subMenuPixmapRect(action);
    pm_rect.setLeft(pm_rect.left() - 20); // give the user a little more space to click

    const int old_index = m_currentIndex;
    m_currentIndex = index;
    if ((hasSubMenuPixmap(action) || action->menu() != 0)
        && pm_rect.contains(m_startPosition)) {
        if (m_currentIndex == m_lastSubMenuIndex) {
            hideSubMenu();
        } else
            slotShowSubMenuNow();
    } else {
        if (index == old_index) {
            if (m_currentIndex == m_lastSubMenuIndex)
                hideSubMenu();
        } else {
            hideSubMenu();
        }
    }

    update();
    if (index != old_index)
        selectCurrentAction();

    return true;
}

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

    return true;
}

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

    if (!rect().contains(event->pos())) {

        if (QMenuBar *mb = qobject_cast<QMenuBar*>(QApplication::widgetAt(event->globalPos()))) {
            const QPoint pt = mb->mapFromGlobal(event->globalPos());
            QAction *action = mb->actionAt(pt);
            if (action && action->menu() == findRootMenu()) {
                // propagate the mouse press event (but don't close the popup)
                sendMouseEventTo(mb, pt, event);
                return true;
            }
            // hide the popup Qt will replay the event
            slotDeactivateNow();
        }
        return true;
    }

    if (m_startPosition.isNull())
        return true;

    event->accept();

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

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

    startDrag(m_startPosition, event->modifiers());
    m_startPosition = QPoint();

    return true;
}

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

    const int index = findAction(mapFromGlobal(event->globalPos()));
    QAction *action = safeActionAt(index);
    if (qobject_cast<SpecialMenuAction*>(action))
        return true;

    QMenu menu(this);
    QVariant itemData;