formwindow.cpp

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                if ((idx >= 0) && (QLatin1Char('_') == s.at(idx)))
                    s = s.left(idx+1) + QString::number(num+1);
                else
                    s = s + QLatin1String("_2");

                it.toFront();
            }
        }
    }

    return !found;
}

/* already_in_form is true when we are moving a widget from one parent to another inside the same
 * form. All this means is that InsertWidgetCommand::undo() must not unmanage it. */

void FormWindow::insertWidget(QWidget *w, const QRect &rect, QWidget *container, bool already_in_form)
{
    clearSelection(false);

    beginCommand(tr("Insert widget '%1").arg(QString::fromUtf8(w->metaObject()->className()))); // ### use the WidgetDatabaseItem

    /* Reparenting into a QSplitter automatically adjusts child's geometry. We create the geometry
     * command before we push the reparent command, so that the geometry command has the original
     * geometry of the widget. */
    QRect r = rect;
    Q_ASSERT(r.isValid());
    SetPropertyCommand *geom_cmd = new SetPropertyCommand(this);
    geom_cmd->init(w, QLatin1String("geometry"), r); // ### use rc.size()

    if (w->parentWidget() != container) {
        ReparentWidgetCommand *cmd = new ReparentWidgetCommand(this);
        cmd->init(w, container);
        m_commandHistory->push(cmd);
    }

    m_commandHistory->push(geom_cmd);

    InsertWidgetCommand *cmd = new InsertWidgetCommand(this);
    cmd->init(w, already_in_form);
    m_commandHistory->push(cmd);

    endCommand();

    w->show();
}

QWidget *FormWindow::createWidget(DomUI *ui, const QRect &rc, QWidget *target)
{
    QWidget *container = findContainer(target, false);
    if (!container)
        return 0;
    if (isMainContainer(container)) {
        if (QMainWindow *mw = qobject_cast<QMainWindow*>(container)) {
            Q_ASSERT(mw->centralWidget() != 0);
            container = mw->centralWidget();
        }
    }
    QDesignerResource resource(this);
    const QWidgetList widgets = resource.paste(ui, container);
    Q_ASSERT(widgets.size() == 1); // multiple-paste from DomUI not supported yet

    insertWidget(widgets.first(), rc, container);
    return widgets.first();
}

#ifndef QT_NO_DEBUG
static bool isDescendant(const QWidget *parent, const QWidget *child)
{
    for (; child != 0; child = child->parentWidget()) {
        if (child == parent)
            return true;
    }
    return false;
}
#endif

void FormWindow::resizeWidget(QWidget *widget, const QRect &geometry)
{
    Q_ASSERT(isDescendant(this, widget));

    QRect r = geometry;
    SetPropertyCommand *cmd = new SetPropertyCommand(this);
    cmd->init(widget, QLatin1String("geometry"), r);
    cmd->setText(tr("Resize"));
    m_commandHistory->push(cmd);
}

void FormWindow::raiseChildSelections(QWidget *w)
{
    const QWidgetList l = qFindChildren<QWidget*>(w);
    if (l.isEmpty())
        return;
    m_selection->raiseList(l);
}

QWidget *FormWindow::containerAt(const QPoint &pos, QWidget *notParentOf)
{
    QWidget *container = 0;
    int depth = -1;
    const QWidgetList selected = selectedWidgets();
    if (rect().contains(mapFromGlobal(pos))) {
        container = mainContainer();
        depth = widgetDepth(container);
    }

    QListIterator<QWidget*> it(m_widgets);
    while (it.hasNext()) {
        QWidget *wit = it.next();
        if (qobject_cast<QLayoutWidget*>(wit) || qobject_cast<QSplitter*>(wit))
            continue;
        if (!wit->isVisibleTo(this))
            continue;
        if (selected.indexOf(wit) != -1)
            continue;
        if (!core()->widgetDataBase()->isContainer(wit) &&
             wit != mainContainer())
            continue;

        // the rectangles of all ancestors of the container must contain the insert position
        QWidget *w = wit;
        while (w && !w->isWindow()) {
            if (!w->rect().contains((w->mapFromGlobal(pos))))
                break;
            w = w->parentWidget();
        }
        if (!(w == 0 || w->isWindow()))
            continue; // we did not get through the full while loop

        int wd = widgetDepth(wit);
        if (wd == depth && container) {
            if (wit->parentWidget()->children().indexOf(wit) >
                 container->parentWidget()->children().indexOf(container))
                wd++;
        }
        if (wd > depth && !isChildOf(wit, notParentOf)) {
            depth = wd;
            container = wit;
        }
    }
    return container;
}

QWidgetList FormWindow::selectedWidgets() const
{
    return m_selection->selectedWidgets();
}

void FormWindow::selectWidgets()
{
    bool selectionChanged = false;
    const QWidgetList l = qFindChildren<QWidget*>(mainContainer());
    QListIterator <QWidget*> it(l);
    const QRect selRect(mapToGlobal(m_currRect.topLeft()), m_currRect.size());
    while (it.hasNext()) {
        QWidget *w = it.next();
        if (w->isVisibleTo(this) && isManaged(w)) {
            const QPoint p = w->mapToGlobal(QPoint(0,0));
            const QRect r(p, w->size());
            if (r.intersects(selRect) && !r.contains(selRect) && trySelectWidget(w, true))
                selectionChanged = true;
        }
    }

    if (selectionChanged)
        emitSelectionChanged();
}

bool FormWindow::handleKeyPressEvent(QWidget *widget, QWidget *, QKeyEvent *e)
{
    if (qobject_cast<const FormWindow*>(widget) || qobject_cast<const QMenu*>(widget))
        return false;

    e->accept(); // we always accept!

    switch (e->key()) {
        default: break; // we don't care about the other keys

        case Qt::Key_Delete:
        case Qt::Key_Backspace:
            deleteWidgets();
            break;

        case Qt::Key_Tab:
            cursor()->movePosition(QDesignerFormWindowCursorInterface::Next);
            break;

        case Qt::Key_Backtab:
            cursor()->movePosition(QDesignerFormWindowCursorInterface::Prev);
            break;

        case Qt::Key_Left:
        case Qt::Key_Right:
        case Qt::Key_Up:
        case Qt::Key_Down:
            handleArrowKeyEvent(e->key(), e->modifiers());
            break;
    }

    return true;
}

int FormWindow::getValue(const QRect &rect, int key, bool size) const
{
    if (size) {
        if (key == Qt::Key_Left || key == Qt::Key_Right)
            return rect.width();
        return rect.height();
    }
    if (key == Qt::Key_Left || key == Qt::Key_Right)
        return rect.x();
    return rect.y();
}

int FormWindow::calcValue(int val, bool forward, bool snap, int snapOffset) const
{
    if (snap) {
        const int rest = val % snapOffset;
        if (rest) {
            const int offset = forward ? snapOffset : 0;
            const int newOffset = rest < 0 ? offset - snapOffset : offset;
            return val + newOffset - rest;
        }
        return (forward ? val + snapOffset : val - snapOffset);
    }
    return (forward ? val + 1 : val - 1);
}

QRect FormWindow::applyValue(const QRect &rect, int val, int key, bool size) const
{
    QRect r = rect;
    if (size) {
        if (key == Qt::Key_Left || key == Qt::Key_Right)
            r.setWidth(val);
        else
            r.setHeight(val);
    } else {
        if (key == Qt::Key_Left || key == Qt::Key_Right)
            r.moveLeft(val);
        else
            r.moveTop(val);
    }
    return r;
}

void FormWindow::handleArrowKeyEvent(int key, Qt::KeyboardModifiers modifiers)
{
    bool startMacro = false;
    QDesignerFormWindowCursorInterface *c = cursor();
    if (!c->hasSelection())
        return;

    QList<QWidget *> selection;

    // check if a laid out widget is selected
    for (int index = 0; index < c->selectedWidgetCount(); ++index) {
        QWidget *w = c->selectedWidget(index);
        if (!LayoutInfo::isWidgetLaidout(m_core, w))
            selection.append(w);
    }

    if (selection.isEmpty())
        return;

    QWidget *current = c->current();
    if (!current || LayoutInfo::isWidgetLaidout(m_core, current)) {
        current = selection.first();
    }

    const bool size = modifiers & Qt::ShiftModifier;

    const bool snap = !(modifiers & Qt::ControlModifier);
    const bool forward = (key == Qt::Key_Right || key == Qt::Key_Down);
    const int snapPoint = (key == Qt::Key_Left || key == Qt::Key_Right) ? grid().x() : grid().y();

    const int oldValue = getValue(current->geometry(), key, size);

    const int newValue = calcValue(oldValue, forward, snap, snapPoint);

    const int offset = newValue - oldValue;

    const int selCount = selection.count();
    // check if selection is the same as last time
    if (selCount != m_moveSelection.count() ||
        m_lastUndoIndex != m_commandHistory->index()) {
        m_moveSelection.clear();
        startMacro = true;
    } else {
        for (int index = 0; index < selCount; ++index) {
            if (m_moveSelection[index]->object() != selection.at(index)) {
                m_moveSelection.clear();
                startMacro = true;
                break;
            }
        }
    }

    if (startMacro)
        beginCommand(tr("Key Move"));

    for (int index = 0; index < selCount; ++index) {
        QWidget *w = selection.at(index);
        const QRect oldGeom = w->geometry();
        const QRect geom = applyValue(oldGeom, getValue(oldGeom, key, size) + offset, key, size);

        SetPropertyCommand *cmd = 0;

        if (m_moveSelection.count() > index)
            cmd = m_moveSelection[index];

        if (!cmd) {
            cmd = new SetPropertyCommand(this);
            cmd->init(w, QLatin1String("geometry"), geom);
            cmd->setText(tr("Key Move"));
            m_commandHistory->push(cmd);

            if (m_moveSelection.count() > index)
                m_moveSelection.replace(index, cmd);
            else
                m_moveSelection.append(cmd);
        } else {
            cmd->setNewValue(geom);
            cmd->redo();
        }
    }

    if (startMacro) {
        endCommand();
        m_lastUndoIndex = m_commandHistory->index();
    }
}

bool FormWindow::handleKeyReleaseEvent(QWidget *, QWidget *, QKeyEvent *e)
{
    e->accept();
    return true;
}

void FormWindow::selectAll()
{
    bool selectionChanged = false;
    foreach (QWidget *widget, m_widgets) {
        if (widget->isVisibleTo(this) && trySelectWidget(widget, true))
            selectionChanged = true;
    }
    if (selectionChanged)
        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()
{
    QWidgetList selection = selectedWidgets();
    simplifySelection(&selection);

    deleteWidgetList(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 (!mainContainer() || !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);
    QWidgetList 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();
    const QWidgetList l(selectedWidgets());
    if (l.count() == 1) {
        w = l.first();
        w = m_core->widgetFactory()->containerOfWidget(w);
        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);
       const  QWidgetList 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();