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Diffstat (limited to 'src/libs/utils/overlaywidget.cpp')
-rw-r--r-- | src/libs/utils/overlaywidget.cpp | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/src/libs/utils/overlaywidget.cpp b/src/libs/utils/overlaywidget.cpp new file mode 100644 index 0000000000..d1a5f6e3d3 --- /dev/null +++ b/src/libs/utils/overlaywidget.cpp @@ -0,0 +1,76 @@ +/**************************************************************************** +** +** Copyright (C) 2020 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of Qt Creator. +** +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 as published by the Free Software +** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-3.0.html. +** +****************************************************************************/ + +#include "overlaywidget.h" + +#include "qtcassert.h" + +#include <QEvent> +#include <QPainter> + +Utils::OverlayWidget::OverlayWidget(QWidget *parent) +{ + setAttribute(Qt::WA_TransparentForMouseEvents); + if (parent) + attachToWidget(parent); +} + +void Utils::OverlayWidget::setPaintFunction(const Utils::OverlayWidget::PaintFunction &paint) +{ + m_paint = paint; +} + +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 (m_paint) { + QPainter p(this); + 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 ); + setGeometry(QRect(QPoint(0, 0), parentWidget()->size())); +} |