gui/src/session/TimeSlider.cpp

   1 #include <cmath>
   2 #include <QTextStream>
   3 #include <QDebug>
   4 #include "TimeSlider.h"
   5 #include "TimeSlider.moc"
   6
   7 TimeSlider::TimeSlider(QWidget* parent) : QWidget(parent) {
   8     setLayout(new QHBoxLayout());
   9     display = new QLineEdit("00:00.000");
  10     display->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
  11     connect(display, SIGNAL(returnPressed()), SLOT(update_slider()));
  12     layout()->addWidget(display);
  13
  14     slider = new QSlider();
  15     slider->setOrientation(Qt::Horizontal);
  16     slider->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
  17     slider->setInvertedControls(true);
  18     slider->setSingleStep(100);
  19     slider->setPageStep(5000);
  20     slider->setMaximum(1000);
  21     connect(slider, SIGNAL(valueChanged(int)), SLOT(update_display(int)));
  22     layout()->addWidget(slider);
  23 }
  24
  25 TimeSlider::~TimeSlider() {
  26
  27 }
  28
  29 void TimeSlider::set_range(const Timestamp& from, const Timestamp& to) {
  30     slider->setMaximum(from.ms_until(to));
  31 }
  32
  33 void TimeSlider::update_display(int new_value) {
  34     if(new_value < 0) return;
  35     QString string;
  36     string.sprintf("%02i:%02i.%03i", (new_value / 1000) / 60, (new_value / 1000) % 60, new_value % 1000);
  37     display->setText(string);
  38 }
  39
  40 void TimeSlider::update_slider() {
  41     QString string = display->text();
  42     QByteArray input = string.toAscii();
  43     int i = 0;
  44     QString minutes, seconds, milliseconds;
  45     for(; i < string.size(); i ++) {
  46         if(isdigit(input[i])) {
  47             minutes += input[i];
  48             continue;
  49         }
  50         else if(input[i] == ':') break;
  51         return;
  52     }
  53     if(input[i] != ':') return;
  54     i ++;
  55     for(; i < string.size(); i ++) {
  56         if(isdigit(input[i])) {
  57             seconds += input[i];
  58             continue;
  59         }
  60         else if(input[i] == '.') break;
  61         return;
  62     }
  63     if(i != string.size()) {
  64         if(input[i] != '.') return;
  65         i ++;
  66         for(; i < string.size(); i ++) {
  67             if(isdigit(input[i])) {
  68                 milliseconds += input[i];
  69                 continue;
  70             }
  71             return;
  72         }
  73     }
  74     int value;
  75     QTextStream stream(&milliseconds);
  76     stream >> i;
  77     value = i;
  78     stream.setString(&seconds);
  79     stream >> i;
  80     value += i * 1000;
  81     stream.setString(&minutes);
  82     stream >> i;
  83     value += i * 60000;
  84     slider->setValue(value);
  85 }