/***************************************************************************
* Copyright (C) 2011-2016 by Ilya Kotov *
* forkotov02@ya.ru *
* *
* 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 *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include <QMouseEvent>
#include <QWheelEvent>
#include <QStyleOptionSlider>
#include <QStyle>
#include <QToolTip>
#include <math.h>
#include "volumeslider.h"
VolumeSlider::VolumeSlider(QWidget *parent) : QSlider(Qt::Horizontal, parent)
{
connect(this, SIGNAL(sliderMoved(int)), SLOT(onSliderMoved(int)));
}
void VolumeSlider::mousePressEvent (QMouseEvent *event)
{
QStyleOptionSlider opt;
initStyleOption(&opt);
QRect sr = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
if (event->button() == Qt::LeftButton &&
sr.contains(event->pos()) == false)
{
int val;
if (orientation() == Qt::Vertical)
val = minimum() + ((maximum() - minimum()) * (height() - event->y())) / height();
else if(layoutDirection() == Qt::RightToLeft)
val = maximum() - ((maximum() - minimum()) * event->x()) / width();
else
val = minimum() + ((maximum() - minimum()) * event->x()) / width();
setSliderDown (true);
if (invertedAppearance() == true)
{
setValue(maximum() - val);
onSliderMoved(maximum() - val);
}
else
{
setValue(val);
onSliderMoved(val);
}
event->accept();
}
QSlider::mousePressEvent(event);
}
void VolumeSlider::mouseReleaseEvent (QMouseEvent *event)
{
setSliderDown (false);
QSlider::mouseReleaseEvent(event);
}
void VolumeSlider::wheelEvent(QWheelEvent *event)
{
setSliderDown(true);
setValue(value() + event->delta() / 20);
setSliderDown(false);
}
void VolumeSlider::onSliderMoved(int pos)
{
if(minimum() != maximum())
{
QStyleOptionSlider opt;
initStyleOption(&opt);
QRect rect = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
rect.moveTo(rect.x() - 10 , rect.y() - 45);
int level = (pos - minimum()) * 100 / (maximum() - minimum());
QToolTip::showText(mapToGlobal(rect.topLeft()), tr("%1%").arg(level), this, QRect());
}
}
