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OpenBoard/src/gui/UBScreenMirror.cpp

129 lines
2.8 KiB

/*
13 years ago
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
12 years ago
* the Free Software Foundation, either version 2 of the License, or
13 years ago
* (at your option) any later version.
*
13 years ago
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "UBScreenMirror.h"
#include "core/UBSettings.h"
#include "core/UBSetting.h"
#include "core/UBApplication.h"
#include "core/memcheck.h"
UBScreenMirror::UBScreenMirror(QWidget* parent)
: QWidget(parent)
, mScreenIndex(0)
, mSourceWidget(0)
, mTimerID(0)
{
// NOOP
}
UBScreenMirror::~UBScreenMirror()
{
// NOOP
}
void UBScreenMirror::paintEvent(QPaintEvent *event)
{
Q_UNUSED(event);
QPainter painter(this);
painter.fillRect(0, 0, width(), height(), QBrush(Qt::black));
if (!mLastPixmap.isNull())
{
int x = (width() - mLastPixmap.width()) / 2;
int y = (height() - mLastPixmap.height()) / 2;
painter.drawPixmap(x, y, mLastPixmap);
}
}
void UBScreenMirror::timerEvent(QTimerEvent *event)
{
Q_UNUSED(event);
grabPixmap();
update();
}
void UBScreenMirror::grabPixmap()
{
if (mSourceWidget)
{
QPoint topLeft = mSourceWidget->mapToGlobal(mSourceWidget->geometry().topLeft());
QPoint bottomRight = mSourceWidget->mapToGlobal(mSourceWidget->geometry().bottomRight());
mRect.setTopLeft(topLeft);
mRect.setBottomRight(bottomRight);
}
mLastPixmap = QPixmap::grabWindow(qApp->desktop()->screen(mScreenIndex)->winId(),
mRect.x(), mRect.y(), mRect.width(), mRect.height());
mLastPixmap = mLastPixmap.scaled(width(), height(), Qt::KeepAspectRatio, Qt::SmoothTransformation);
}
void UBScreenMirror::setSourceWidget(QWidget *sourceWidget)
{
mSourceWidget = sourceWidget;
mScreenIndex = qApp->desktop()->screenNumber(sourceWidget);
grabPixmap();
update();
}
void UBScreenMirror::start()
{
if (mTimerID == 0)
{
int ms = 125;
bool success;
int fps = UBSettings::settings()->mirroringRefreshRateInFps->get().toInt(&success);
if (success && fps > 0)
{
ms = 1000 / fps;
}
mTimerID = startTimer(ms);
}
else
{
qDebug() << "UBScreenMirror::start() : Timer alrady running ...";
}
}
void UBScreenMirror::stop()
{
if (mTimerID != 0)
{
killTimer(mTimerID);
mTimerID = 0;
}
}