forked from qt-creator/qt-creator
77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
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/****************************************************************************
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**
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** Copyright (C) 2020 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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****************************************************************************/
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#include "overlaywidget.h"
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#include "qtcassert.h"
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#include <QEvent>
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#include <QPainter>
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Utils::OverlayWidget::OverlayWidget(QWidget *parent)
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{
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setAttribute(Qt::WA_TransparentForMouseEvents);
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if (parent)
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attachToWidget(parent);
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}
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void Utils::OverlayWidget::setPaintFunction(const Utils::OverlayWidget::PaintFunction &paint)
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{
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m_paint = paint;
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}
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bool Utils::OverlayWidget::eventFilter(QObject *obj, QEvent *ev)
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{
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if (obj == parent() && ev->type() == QEvent::Resize)
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resizeToParent();
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return QWidget::eventFilter(obj, ev);
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}
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void Utils::OverlayWidget::paintEvent(QPaintEvent *ev)
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{
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if (m_paint) {
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QPainter p(this);
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m_paint(this, p, ev);
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}
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}
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void Utils::OverlayWidget::attachToWidget(QWidget *parent)
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{
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if (parentWidget())
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parentWidget()->removeEventFilter(this);
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setParent(parent);
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if (parent) {
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parent->installEventFilter(this);
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resizeToParent();
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raise();
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}
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}
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void Utils::OverlayWidget::resizeToParent()
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{
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QTC_ASSERT(parentWidget(), return );
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setGeometry(QRect(QPoint(0, 0), parentWidget()->size()));
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}
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