src/minislider.cpp

   1 #include <QMouseEvent>
   2 #include <QPainter>
   3 #include <QSizePolicy>
   4
   5 #include "minislider.h"
   6
   7 MiniSlider::MiniSlider (QWidget* parent)
   8   : QWidget(parent), m_value(0), m_maxValue(1)
   9 {
  10   setSizePolicy(QSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Preferred));
  11 }
  12
  13 void MiniSlider::paintEvent(QPaintEvent* event)
  14 {
  15   QWidget::paintEvent(event);
  16
  17   QPainter painter(this);
  18
  19   int sliderPos = width()*((float)m_value/m_maxValue);
  20
  21   /* background */
  22   painter.setPen(Qt::NoPen);
  23   painter.setBrush(Qt::black);
  24   painter.drawRect(0,0,width(),height());
  25
  26   /* bar */
  27   painter.setPen(Qt::NoPen);
  28   painter.setBrush(Qt::darkGray);
  29   painter.drawRect(0,0,sliderPos,height());
  30
  31   /* border */
  32   /*
  33   QPen borderPen;
  34   borderPen.setWidth(2);
  35   painter.setPen(borderPen);
  36   painter.setBrush(Qt::NoBrush);
  37   painter.drawRect(1,1,width()-1,height()-1);
  38   */
  39 }
  40
  41 QSize MiniSlider::minimumSizeHint() const
  42 {
  43   return QSize(20, 5);
  44 }
  45
  46 void MiniSlider::mousePressEvent(QMouseEvent *event)
  47 {
  48     if (event->button() == Qt::LeftButton)
  49       emit valueChanged(((float)event->x()/width())*m_maxValue);
  50 }
  51
  52 void MiniSlider::mouseMoveEvent(QMouseEvent *event)
  53 {
  54       emit valueChanged(((float)event->x()/width())*m_maxValue);
  55 }
  56
  57 void MiniSlider::setValue (double value)
  58 {
  59   setValue((int)value);
  60 }
  61
  62 void MiniSlider::setValue (int value)
  63 {
  64   Q_ASSERT(value>=0);
  65   Q_ASSERT(value<=m_maxValue);
  66
  67   m_value = value;
  68   update();
  69 }
  70
  71
  72 void VolumeSlider::mousePressEvent(QMouseEvent *event)
  73 {
  74     if (event->button() == Qt::LeftButton)
  75       setValue(((float)event->x()/width())*m_maxValue);
  76
  77     MiniSlider::mousePressEvent(event);
  78 }
  79
  80 void VolumeSlider::mouseMoveEvent(QMouseEvent *event)
  81 {
  82     setValue(((float)event->x()/width())*m_maxValue);
  83     MiniSlider::mouseMoveEvent(event);
  84 }