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// Copyright (C) 2020 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include "overlaywidget.h"
#include "qtcassert.h"
#include <QEvent>
#include <QPainter>
namespace Utils::Internal {
class OverlayWidgetPrivate
{
public:
OverlayWidget::PaintFunction m_paint;
OverlayWidget::ResizeFunction m_resize;
};
} // namespace Utils::Internal
Utils::OverlayWidget::OverlayWidget(QWidget *parent)
: d(new Internal::OverlayWidgetPrivate)
{
setAttribute(Qt::WA_TransparentForMouseEvents);
if (parent)
attachToWidget(parent);
d->m_resize = [](QWidget *w, const QSize &size) { w->setGeometry(QRect(QPoint(0, 0), size)); };
}
Utils::OverlayWidget::~OverlayWidget() = default;
void Utils::OverlayWidget::setPaintFunction(const Utils::OverlayWidget::PaintFunction &paint)
{
d->m_paint = paint;
}
void Utils::OverlayWidget::setResizeFunction(const ResizeFunction &resize)
{
d->m_resize = resize;
}
bool Utils::OverlayWidget::eventFilter(QObject *obj, QEvent *ev)
{
if (obj == parent() && ev->type() == QEvent::Resize)
resizeToParent();
return QWidget::eventFilter(obj, ev);
}
void Utils::OverlayWidget::paintEvent(QPaintEvent *ev)
{
if (d->m_paint) {
QPainter p(this);
d->m_paint(this, p, ev);
}
}
void Utils::OverlayWidget::attachToWidget(QWidget *parent)
{
if (parentWidget())
parentWidget()->removeEventFilter(this);
setParent(parent);
if (parent) {
parent->installEventFilter(this);
resizeToParent();
raise();
}
}
void Utils::OverlayWidget::resizeToParent()
{
QTC_ASSERT(parentWidget(), return );
if (d->m_resize)
d->m_resize(this, parentWidget()->size());
}
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