formwindow.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

    }

    blockSignals(blocked);
    emitSelectionChanged();
}

void FormWindow::layoutHorizontal()
{
    LayoutCommand *cmd = new LayoutCommand(this);
    cmd->init(mainContainer(), selectedWidgets(), LayoutInfo::HBox);
    clearSelection(false);
    commandHistory()->push(cmd);
}

void FormWindow::layoutVertical()
{
    LayoutCommand *cmd = new LayoutCommand(this);
    cmd->init(mainContainer(), selectedWidgets(), LayoutInfo::VBox);
    clearSelection(false);
    commandHistory()->push(cmd);
}

void FormWindow::layoutGrid()
{
    LayoutCommand *cmd = new LayoutCommand(this);
    cmd->init(mainContainer(), selectedWidgets(), LayoutInfo::Grid);
    clearSelection(false);
    commandHistory()->push(cmd);
}

void FormWindow::deleteWidgets(const QList<QWidget*> &widget_list)
{
    if (widget_list.isEmpty())
        return;

    beginCommand(tr("Delete"));

    foreach (QWidget *w, widget_list) {
        emit widgetRemoved(w);
        DeleteWidgetCommand *cmd = new DeleteWidgetCommand(this);
        cmd->init(w);
        m_commandHistory->push(cmd);
    }

    endCommand();
}


void FormWindow::deleteWidgets()
{
    QList<QWidget*> selection = selectedWidgets();
    simplifySelection(&selection);

    deleteWidgets(selection);
}

QString FormWindow::fileName() const
{
    return m_fileName;
}

void FormWindow::setFileName(const QString &fileName)
{
    if (m_fileName == fileName)
        return;

    m_fileName = fileName;
    emit fileNameChanged(fileName);
}

QString FormWindow::contents() const
{
    QBuffer b;
    if (!b.open(QIODevice::WriteOnly))
        return QString();

    QDesignerResource resource(const_cast<FormWindow*>(this));
    resource.save(&b, mainContainer());

    return QString::fromUtf8(b.buffer());
}

void FormWindow::copy()
{
    QBuffer b;
    if (!b.open(QIODevice::WriteOnly))
        return;

    QDesignerResource resource(this);
    QList<QWidget*> sel = selectedWidgets();
    simplifySelection(&sel);
    resource.copy(&b, sel);

    qApp->clipboard()->setText(QString::fromUtf8(b.buffer()), QClipboard::Clipboard);
}

void FormWindow::cut()
{
    copy();
    deleteWidgets();
}

void FormWindow::paste()
{
    QWidget *w = mainContainer();
    QList<QWidget*> l(selectedWidgets());
    if (l.count() == 1) {
        w = l.first();
        if (LayoutInfo::layoutType(m_core, w) != LayoutInfo::NoLayout ||
             (!core()->widgetDataBase()->isContainer(w) &&
               w != mainContainer()))
            w = mainContainer();
    }

    if (w && LayoutInfo::layoutType(m_core, w) == LayoutInfo::NoLayout) {
        clearSelection(true);

        QByteArray code = qApp->clipboard()->text().toUtf8();
        QBuffer b(&code);
        b.open(QIODevice::ReadOnly);

        QDesignerResource resource(this);
        QWidget *widget = core()->widgetFactory()->containerOfWidget(w);
        QList<QWidget*> widgets = resource.paste(&b, widget);

        beginCommand(tr("Paste"));
        foreach (QWidget *w, widgets) {
            InsertWidgetCommand *cmd = new InsertWidgetCommand(this);
            cmd->init(w);
            m_commandHistory->push(cmd);
            selectWidget(w);
        }
        endCommand();

        /* This will put the freshly pasted widgets into the clipboard, replacing the original.
           The point here is that the copied widgets are shifted a little with respect to the original.
           If the user presses paste again, the pasted widgets will be shifted again, rather than
           appearing on top of the previously pasted widgets. */
        copy();

    } else {
        QMessageBox::information(this, tr("Paste error"),
                                  tr("Can't paste widgets. Designer couldn't find a container\n"
                                      "to paste into which does not contain a layout. Break the layout\n"
                                      "of the container you want to paste into and select this container\n"
                                      "and then paste again."));
    }

}

void FormWindow::manageWidget(QWidget *w)
{
    if (isManaged(w))
        return;

    Q_ASSERT(qobject_cast<QMenu*>(w) == 0);

    if (w->hasFocus())
        setFocus();

    core()->metaDataBase()->add(w);

    m_insertedWidgets.insert(w);
    m_widgets.append(w);

    setCursorToAll(Qt::ArrowCursor, w);

    if (QDesignerPromotedWidget *promoted = qobject_cast<QDesignerPromotedWidget*>(w))
        manageWidget(promoted->child());

    emit changed();
    emit widgetManaged(w);
}

void FormWindow::unmanageWidget(QWidget *w)
{
    if (!isManaged(w))
        return;

    if (usedSelections.contains(w))
        usedSelections.value(w)->setWidget(0);

    emit aboutToUnmanageWidget(w);

    core()->metaDataBase()->remove(w);

    m_insertedWidgets.remove(w);
    m_widgets.removeAt(m_widgets.indexOf(w));

    emit changed();
    emit widgetUnmanaged(w);
}

bool FormWindow::isManaged(QWidget *w) const
{
    return m_insertedWidgets.contains(w);
}

void FormWindow::breakLayout(QWidget *w)
{
    if (w == this)
        w = mainContainer();

    w = core()->widgetFactory()->containerOfWidget(w);

    beginCommand(tr("Break layout"));

    for (;;) {
        if (!w || w == this)
            break;

        if (LayoutInfo::layoutType(m_core, core()->widgetFactory()->containerOfWidget(w)) != LayoutInfo::NoLayout
                && core()->widgetDataBase()->isContainer(w, false)) {

            if (BreakLayoutCommand *cmd = breakLayoutCommand(w)) {
                commandHistory()->push(cmd);
            }

            if (!qobject_cast<QLayoutWidget*>(w) && !qobject_cast<QSplitter*>(w))
                break;
        }

        w = w->parentWidget();
    }

    clearSelection(false);
    endCommand();
}

BreakLayoutCommand *FormWindow::breakLayoutCommand(QWidget *w)
{
    QList<QWidget*> widgets;

    QListIterator<QObject*> it(w->children());
    while (it.hasNext()) {
        QObject *obj = it.next();

        if (!obj->isWidgetType()
                || !core()->metaDataBase()->item(obj))
            continue;

        widgets.append(static_cast<QWidget*>(obj));
    }

    Q_ASSERT(widgets.isEmpty() == false);

    BreakLayoutCommand *cmd = new BreakLayoutCommand(this);
    cmd->init(widgets, core()->widgetFactory()->widgetOfContainer(w));
    return cmd;
}

void FormWindow::breakLayout()
{
    QWidget *w = currentWidget() ? currentWidget() : mainContainer();

    if (LayoutInfo::layoutType(m_core, w) != LayoutInfo::NoLayout ||
         w->parentWidget() && LayoutInfo::layoutType(m_core, w->parentWidget()) != LayoutInfo::NoLayout) {
        breakLayout(w);
        return;
    } else {
        QList<QWidget*> widgets = selectedWidgets();
        QListIterator<QWidget*> it(widgets);
        while (it.hasNext()) {
            QWidget *w = it.next();
            if (LayoutInfo::layoutType(m_core, w) != LayoutInfo::NoLayout ||
                 w->parentWidget() && LayoutInfo::layoutType(m_core, w->parentWidget()) != LayoutInfo::NoLayout)
                break;
        }
        if (w) {
            breakLayout(w);
            return;
        }
    }

    w = mainContainer();

    if (LayoutInfo::layoutType(m_core, w) != LayoutInfo::NoLayout ||
         w->parentWidget() && LayoutInfo::layoutType(m_core, w->parentWidget()) != LayoutInfo::NoLayout)
        breakLayout(w);
}

void FormWindow::beginCommand(const QString &description)
{
    m_commandHistory->push(new QtCommand(QtCommand::MacroBegin, description));
}

void FormWindow::endCommand()
{
    m_commandHistory->push(new QtCommand(QtCommand::MacroEnd, QString()));
}

void FormWindow::raiseWidgets()
{
    QList<QWidget*> widgets = selectedWidgets();
    simplifySelection(&widgets);

    foreach (QWidget *widget, widgets) {
        widget->raise();
    }
}

void FormWindow::lowerWidgets()
{
    QList<QWidget*> widgets = selectedWidgets();
    simplifySelection(&widgets);

    foreach (QWidget *widget, widgets) {
        widget->lower();
    }
}

bool FormWindow::handleMouseButtonDblClickEvent(QWidget *, QWidget *managedWidget, QMouseEvent *e)
{
    e->accept();

    clearSelection(false);
    selectWidget(managedWidget);

    emit activated(managedWidget);
    return true;
}

void FormWindow::finishContextMenu(QWidget *w, QWidget *, QContextMenuEvent *e)
{
    e->accept();

    QDesignerTaskMenuExtension *taskMenu = qt_extension<QDesignerTaskMenuExtension*>(core()->extensionManager(), w);
    QMenu *menu = createPopupMenu(w);
    if (menu && taskMenu) {
        QList<QAction *> acts = taskMenu->taskActions();
        QAction *sep = new QAction(menu);
        sep->setSeparator(true);
        acts.append(sep);
        menu->insertActions(menu->actions().at(0), acts);
    }

    if (menu) {
        emit contextMenuRequested(menu, w);
        menu->exec(e->globalPos());
        delete menu;
    }
}


bool FormWindow::handleContextMenu(QWidget *, QWidget *managedWidget, QContextMenuEvent *e)
{
    e->accept();

    bool selected = isWidgetSelected(managedWidget);
    if (selected == false) {
        clearSelection(false);

        selectWidget(managedWidget);
        raiseChildSelections(managedWidget); // raise selections and select widget

        QMetaObject::invokeMethod(core()->formWindowManager(), "slotUpdateActions");
    }

    if (!isMainContainer(managedWidget)) { // press on a child widget
        // if widget is laid out, find the first non-laid out super-widget
        QWidget *realWidget = managedWidget; // but store the original one
        QMainWindow *mw = qobject_cast<QMainWindow*>(mainContainer());

        if (mw && mw->centralWidget() == realWidget) {
            finishContextMenu(managedWidget, this, e);
        } else {
            finishContextMenu(realWidget, realWidget, e);
        }
    } else {
        finishContextMenu(mainContainer(), mainContainer(), e);
    }

    return true;
}

void FormWindow::setContents(QIODevice *dev)
{
    bool saved = updatesEnabled();

    setUpdatesEnabled(false);
    clearSelection();

    if (mainContainer()) {
        core()->metaDataBase()->remove(mainContainer());
        delete mainContainer();
        m_mainContainer = 0;
    }

    m_insertedWidgets.clear();
    m_widgets.clear();
    emit changed();

    QDesignerResource r(this);
    QWidget *w = r.load(dev, this);
    if (w == 0) {
        setFileName(QString());
        w = core()->widgetFactory()->createWidget(QLatin1String("QWidget"), this);
        w->resize(400, 300);
    }

    setMainContainer(w);

    setUpdatesEnabled(saved);
}

void FormWindow::setContents(const QString &contents)
{
    QByteArray data = contents.toUtf8();
    QBuffer b(&data);
    if (b.open(QIODevice::ReadOnly))
        setContents(&b);
}

void FormWindow::layoutHorizontalContainer(QWidget *w)
{
    if (w == this)
        w = mainContainer();

    w = core()->widgetFactory()->containerOfWidget(w);

    QList<QObject*> l = w->children();
    if (l.isEmpty())
        return;

    QList<QWidget*> widgets;
    QListIterator<QObject*> it(l);
    while (it.hasNext()) {
        QObject* o = it.next();
        if (!o->isWidgetType())
            continue;

        QWidget *widget = static_cast<QWidget*>(o);
        if (widget->isVisibleTo(this) && isManaged(widget))
            widgets.append(widget);
    }

    LayoutCommand *cmd = new LayoutCommand(this);
    cmd->init(mainContainer(), widgets, LayoutInfo::HBox, w);
    clearSelection(false);
    commandHistory()->push(cmd);
}

void FormWindow::layoutVerticalContainer(QWidget *w)
{
    if (w == this)
        w = mainContainer();

    w = core()->widgetFactory()->containerOfWidget(w);

    QList<QObject*> l = w->children();
    if (l.isEmpty())
        return;

    QListIterator<QObject*> it(l);
    QList<QWidget*> widgets;
    while (it.hasNext()) {
        QObject* o = it.next();
        if (!o->isWidgetType())
            continue;

        QWidget *widget = static_cast<QWidget*>(o);
        if (widget->isVisibleTo(this) && isManaged(widget))
            widgets.append(widget);
    }

    LayoutCommand *cmd = new LayoutCommand(this);
    cmd->init(mainContainer(), widgets, LayoutInfo::VBox, w);
    clearSelection(false);
    commandHistory()->push(cmd);
}

void FormWindow::layoutGridContainer(QWidget *w)
{
    if (w == this)
        w = mainContainer();

    w = core()->widgetFactory()->containerOfWidget(w);

    QList<QObject*> l = w->children();
    if (l.isEmpty())
        return;

    QList<QWidget*> widgets;
    QListIterator<QObject*> it(l);
    while (it.hasNext()) {
        QObject* o = it.next();

        if (!o->isWidgetType())
            continue;

        QWidget *widget = static_cast<QWidget*>(o);
        if (widget->isVisibleTo(this) && isManaged(widget))
            widgets.append(widget);
    }

    LayoutCommand *cmd = new LayoutCommand(this);
    cmd->init(mainContainer(), widgets, LayoutInfo::Grid, w);
    clearSelection(false);
    commandHistory()->push(cmd);
}

bool FormWindow::hasInsertedChildren(QWidget *widget) const // ### move
{
    if (QDesignerContainerExtension *container = qt_extension<QDesignerContainerExtension*>(core()->extensionManager(), widget)) {
        widget = container->widget(container->currentIndex());
    }

    QList<QWidget*> l = widgets(widget);

    foreach (QWidget *child, l) {
        if (isManaged(child) && !LayoutInfo::isWidgetLaidout(core(), child) && child->isVisibleTo(const_cast<FormWindow*>(this)))
            return true;
    }

    return false;
}

void FormWindow::layoutHorizontalSplit()
{
    LayoutCommand *cmd = new LayoutCommand(this);
    cmd->init(mainContainer(), selectedWidgets(), LayoutInfo::HBox, /*layoutBase=*/ 0, /*splitter=*/ true);
    clearSelection(false);
    commandHistory()->push(cmd);
}

void FormWindow::layoutVerticalSplit()
{
    LayoutCommand *cmd = new LayoutCommand(this);
    cmd->init(mainContainer(), selectedWidgets(), LayoutInfo::VBox, /*layoutBase=*/ 0, /*splitter=*/ true);
    clearSelection(false);
    commandHistory()->push(cmd);
}

QMenu *FormWindow::createPopupMenu(QWidget *w)
{
    QDesignerFormWindowManagerInterface *manager = core()->formWindowManager();
    bool isFormWindow = qobject_cast<FormWindow*>(w);

    QMenu *popup = new QMenu(this);

    if (QDesignerPromotedWidget *promoted = qobject_cast<QDesignerPromotedWidget*>(w))
        w = promoted->child();

    if (qobject_cast<QDesignerTabWidget*>(w)) {
        QDesignerTabWidget *tabWidget = static_cast<QDesignerTabWidget*>(w);
        if (tabWidget->count()) {
            popup->addAction(tabWidget->actionDeletePage());
        }
        QMenu *insertPageMenu = popup->addMenu(tr("Insert Page"));
        insertPageMenu->addAction(tabWidget->actionInsertPageAfter());
        insertPageMenu->addAction(tabWidget->actionInsertPage());
        popup->addSeparator();
    } else if (qobject_cast<QDesignerStackedWidget*>(w)) {
        QDesignerStackedWidget *stackedWidget = static_cast<QDesignerStackedWidget*>(w);
        if (stackedWidget->count()) {
            popup->addAction(stackedWidget->actionDeletePage());
        }
        QMenu *insertPageMenu = popup->addMenu(tr("Insert Page"));
        insertPageMenu->addAction(stackedWidget->actionInsertPageAfter());
        insertPageMenu->addAction(stackedWidget->actionInsertPage());