File indexing completed on 2024-12-22 04:40:21

 /*
     smplayer, GUI front-end for mplayer.
     SPDX-FileCopyrightText: 2007 Ricardo Villalba <rvm@escomposlinux.org>
 
     modified for inclusion in Subtitle Composer
     SPDX-FileCopyrightText: 2007-2009 Sergio Pistone <sergio_pistone@yahoo.com.ar>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "pointingslider.h"
 
 #include <QApplication>
 #include <QStyle>
 #include <QMouseEvent>
 
 PointingSlider::PointingSlider(QWidget *parent) :
     QSlider(parent)
 {}
 
 PointingSlider::PointingSlider(Qt::Orientation orientation, QWidget *parent) :
     QSlider(orientation, parent)
 {}
 
 PointingSlider::~PointingSlider()
 {}
 
 #if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
 #define position pos
 #endif
 
 // The code from the following function is from Javier Díaz,
 // taken from a post in the Qt-interest mailing list.
 void
 PointingSlider::mousePressEvent(QMouseEvent *e)
 {
     int range = maximum() - minimum();
 
     int clickedValue;                       // this will contain the value corresponding to the clicked (x,y) screen position
     double pixelsPerUnit;           // the will contain the amount of pixels corresponding to each slider range unit
 
     if(orientation() == Qt::Horizontal) {
         int width = this->width();
         pixelsPerUnit = (double)width / range;
         clickedValue = (e->position().x() * range) / width;
 
         if((qApp->isRightToLeft() && !invertedAppearance()) || (!qApp->isRightToLeft() && invertedAppearance()))
             clickedValue = maximum() - clickedValue;
     } else {
         int height = this->height();
         pixelsPerUnit = (double)height / range;
         clickedValue = (e->position().y() * range) / height;
 
         if(!invertedAppearance())
             clickedValue = maximum() - clickedValue;
     }
 
     // calculate how many range units take the slider handle
     int sliderHandleUnits = (int)(qApp->style()->pixelMetric(QStyle::PM_SliderLength) / pixelsPerUnit);
 
     // if the condition is is not true, the user has clicked inside the slider
     // (or a screen position with a corresponding range value inside the slider tolerance)
     if(qAbs(clickedValue - value()) > sliderHandleUnits) {
         setValue(clickedValue);
         emit sliderMoved(clickedValue);
     } else {
         QSlider::mousePressEvent(e);
     }
 }