qwidgetaction.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qwidgetaction.h"
#include "qwidget.h"
#include "qdebug.h"
 
#include <QtWidgets/private/qwidget_p.h>
 
#include "qwidgetaction_p.h"
 
QT_BEGIN_NAMESPACE
 
QWidgetAction::QWidgetAction(QObject *parent)
    : QAction(*(new QWidgetActionPrivate), parent)
{
}
 
QWidgetAction::~QWidgetAction()
{
    Q_D(QWidgetAction);
    for (QWidget *w : std::as_const(d->createdWidgets))
        QObjectPrivate::disconnect(w, &QWidget::destroyed,
                                   d, &QWidgetActionPrivate::widgetDestroyed);
    QList<QWidget *> widgetsToDelete = d->createdWidgets;
    d->createdWidgets.clear();
    qDeleteAll(widgetsToDelete);
    delete d->defaultWidget;
}
 
void QWidgetAction::setDefaultWidget(QWidget *widget)
{
    Q_D(QWidgetAction);
    if (widget == d->defaultWidget || d->defaultWidgetInUse)
        return;
    delete d->defaultWidget;
    d->defaultWidget = widget;
    if (!widget)
        return;
 
    setVisible(!QWidgetPrivate::get(widget)->isExplicitlyHidden());
    d->defaultWidget->hide();
    d->defaultWidget->setParent(nullptr);
    d->defaultWidgetInUse = false;
    if (!isEnabled())
        d->defaultWidget->setEnabled(false);
}
 
QWidget *QWidgetAction::defaultWidget() const
{
    Q_D(const QWidgetAction);
    return d->defaultWidget;
}
 
QWidget *QWidgetAction::requestWidget(QWidget *parent)
{
    Q_D(QWidgetAction);
 
    QWidget *w = createWidget(parent);
    if (!w) {
        if (d->defaultWidgetInUse || !d->defaultWidget)
            return nullptr;
        d->defaultWidget->setParent(parent);
        d->defaultWidgetInUse = true;
        return d->defaultWidget;
    }
 
    QObjectPrivate::connect(w, &QWidget::destroyed,
                            d, &QWidgetActionPrivate::widgetDestroyed);
    d->createdWidgets.append(w);
    return w;
}
 
void QWidgetAction::releaseWidget(QWidget *widget)
{
    Q_D(QWidgetAction);
 
    if (widget == d->defaultWidget) {
        d->defaultWidget->hide();
        d->defaultWidget->setParent(nullptr);
        d->defaultWidgetInUse = false;
        return;
    }
 
    if (!d->createdWidgets.contains(widget))
        return;
 
    QObjectPrivate::disconnect(widget, &QWidget::destroyed,
                               d, &QWidgetActionPrivate::widgetDestroyed);
    d->createdWidgets.removeAll(widget);
    deleteWidget(widget);
}
 
bool QWidgetAction::event(QEvent *event)
{
    Q_D(QWidgetAction);
    if (event->type() == QEvent::ActionChanged) {
        if (d->defaultWidget)
            d->defaultWidget->setEnabled(isEnabled());
        for (int i = 0; i < d->createdWidgets.size(); ++i)
            d->createdWidgets.at(i)->setEnabled(isEnabled());
    }
    return QAction::event(event);
}
 
bool QWidgetAction::eventFilter(QObject *obj, QEvent *event)
{
    return QAction::eventFilter(obj,event);
}
 
QWidget *QWidgetAction::createWidget(QWidget *parent)
{
    Q_UNUSED(parent);
    return nullptr;
}
 
void QWidgetAction::deleteWidget(QWidget *widget)
{
    widget->hide();
    widget->deleteLater();
}
 
QList<QWidget *> QWidgetAction::createdWidgets() const
{
    Q_D(const QWidgetAction);
    return d->createdWidgets;
}
 
QT_END_NAMESPACE
 
#include "moc_qwidgetaction.cpp"