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/* BEGIN_COMMON_COPYRIGHT_HEADER
* (c)LGPL2+
*
* LXQt - a lightweight, Qt based, desktop toolset
* https://lxqt.org
*
* Copyright: 2020 LXQt team
* Authors:
*
* This program or library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* END_COMMON_COPYRIGHT_HEADER */
#include "backlight.h"
#include <QEvent>
#include <cmath>
BacklightButton::BacklightButton(QWidget *parent):
QToolButton(parent),
m_mouseWheelThresholdCounter(0) {}
void BacklightButton::wheelEvent(QWheelEvent *e)
{
e->accept();
QPoint angleDelta = e->angleDelta();
Qt::Orientation orient = (std::abs(angleDelta.x()) > std::abs(angleDelta.y()) ? Qt::Horizontal : Qt::Vertical);
int rotationSteps = (orient == Qt::Horizontal ? angleDelta.x() : angleDelta.y());
m_mouseWheelThresholdCounter += rotationSteps;
if(std::abs(m_mouseWheelThresholdCounter) < 100)
return;
emit wheel(rotationSteps > 0 ? true : false);
m_mouseWheelThresholdCounter = 0;
}
LXQtBacklight::LXQtBacklight(const ILXQtPanelPluginStartupInfo &startupInfo):
QObject(),
ILXQtPanelPlugin(startupInfo)
{
m_backlightButton = new BacklightButton();
// use our own icon
m_backlightButton->setIcon(QIcon::fromTheme(QStringLiteral("brightnesssettings")));
m_backlightButton->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
m_updateTimer.setSingleShot(true);
m_updateTimer.setInterval(2000);
m_backlightSlider = new SliderDialog(m_backlightButton);
connect(m_backlightButton, &BacklightButton::wheel, m_backlightSlider, [this](bool up) {
// Using a timer is only a safeguard against returning the slider to its previous value
// on updating it, although that should not happen with the code of SliderDialog.
if (!m_updateTimer.isActive())
m_backlightSlider->updateBacklight();
m_updateTimer.start();
if (up)
m_backlightSlider->upButtonClicked(true);
else
m_backlightSlider->downButtonClicked(true);
});
connect(m_backlightButton, &QToolButton::clicked, this, &LXQtBacklight::toggleSlider);
}
LXQtBacklight::~LXQtBacklight()
{
delete m_backlightButton;
}
QWidget *LXQtBacklight::widget()
{
return m_backlightButton;
}
void LXQtBacklight::toggleSlider()
{
if (m_backlightSlider->isVisible())
m_backlightSlider->hide();
else
{
QSize size = m_backlightSlider->sizeHint();
QRect rect = calculatePopupWindowPos(size);
m_backlightSlider->setGeometry(rect);
m_backlightSlider->updateBacklight();
m_backlightSlider->show();
m_backlightSlider->setFocus();
}
}
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