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83 lines
2.1 KiB
83 lines
2.1 KiB
/*
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* Copyright (C) 2015-2022 Département de l'Instruction Publique (DIP-SEM)
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*
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* Copyright (C) 2013 Open Education Foundation
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*
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* Copyright (C) 2010-2013 Groupement d'Intérêt Public pour
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* l'Education Numérique en Afrique (GIP ENA)
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*
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* This file is part of OpenBoard.
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*
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* OpenBoard is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License,
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* with a specific linking exception for the OpenSSL project's
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* "OpenSSL" library (or with modified versions of it that use the
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* same license as the "OpenSSL" library).
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*
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* OpenBoard is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with OpenBoard. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "UBWidgetMirror.h"
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#include "core/memcheck.h"
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UBWidgetMirror::UBWidgetMirror(QWidget* sourceWidget, QWidget* parent)
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: QWidget(parent, 0)
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, mSourceWidget(sourceWidget)
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{
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mSourceWidget->installEventFilter(this);
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}
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UBWidgetMirror::~UBWidgetMirror()
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{
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// NOOP
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}
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bool UBWidgetMirror::eventFilter(QObject *obj, QEvent *event)
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{
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bool result = QObject::eventFilter(obj, event);
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if (event->type() == QEvent::Paint && obj == mSourceWidget)
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{
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QPaintEvent *paintEvent = static_cast<QPaintEvent *>(event);
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update(paintEvent->rect());
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}
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return result;
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}
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void UBWidgetMirror::paintEvent(QPaintEvent *event)
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{
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QPainter painter(this);
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painter.setBackgroundMode(Qt::OpaqueMode);
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painter.setBackground(Qt::black);
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mSourceWidget->render(&painter, event->rect().topLeft(), QRegion(event->rect()));
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}
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void UBWidgetMirror::setSourceWidget(QWidget *sourceWidget)
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{
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if (mSourceWidget)
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{
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mSourceWidget->removeEventFilter(this);
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}
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mSourceWidget = sourceWidget;
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mSourceWidget->installEventFilter(this);
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update();
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}
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