waveformview: made UI seekable

app/widget/timeruler/seekablewidget.cpp

@@ -0,0 +1,110 @@
+#include "seekablewidget.h"
+
+#include <QMouseEvent>
+#include <QtMath>
+
+SeekableWidget::SeekableWidget(QWidget* parent) :
+  TimelineScaledWidget(parent),
+  time_(0),
+  timeline_points_(nullptr),
+  scroll_(0)
+{
+
+}
+
+void SeekableWidget::ConnectTimelinePoints(TimelinePoints *points)
+{
+  if (timeline_points_) {
+    disconnect(timeline_points_->workarea(), &TimelineWorkArea::RangeChanged, this, static_cast<void (SeekableWidget::*)()>(&SeekableWidget::update));
+    disconnect(timeline_points_->workarea(), &TimelineWorkArea::EnabledChanged, this, static_cast<void (SeekableWidget::*)()>(&SeekableWidget::update));
+  }
+
+  timeline_points_ = points;
+
+  if (timeline_points_) {
+    connect(timeline_points_->workarea(), &TimelineWorkArea::RangeChanged, this, static_cast<void (SeekableWidget::*)()>(&SeekableWidget::update));
+    connect(timeline_points_->workarea(), &TimelineWorkArea::EnabledChanged, this, static_cast<void (SeekableWidget::*)()>(&SeekableWidget::update));
+  }
+
+  update();
+}
+
+const int64_t &SeekableWidget::GetTime() const
+{
+  return time_;
+}
+
+const int &SeekableWidget::GetScroll() const
+{
+  return scroll_;
+}
+
+void SeekableWidget::mousePressEvent(QMouseEvent *event)
+{
+  SeekToScreenPoint(event->pos().x());
+}
+
+void SeekableWidget::mouseMoveEvent(QMouseEvent *event)
+{
+  if (event->buttons() & Qt::LeftButton) {
+    SeekToScreenPoint(event->pos().x());
+  }
+}
+
+void SeekableWidget::ScaleChangedEvent(const double &)
+{
+  update();
+}
+
+TimelinePoints *SeekableWidget::timeline_points() const
+{
+  return timeline_points_;
+}
+
+void SeekableWidget::SetTime(const int64_t &r)
+{
+  time_ = r;
+
+  update();
+}
+
+void SeekableWidget::SetScroll(int s)
+{
+  scroll_ = s;
+
+  update();
+}
+
+double SeekableWidget::ScreenToUnitFloat(int screen)
+{
+  return (screen + scroll_) / GetScale() / timebase_dbl();
+}
+
+int64_t SeekableWidget::ScreenToUnit(int screen)
+{
+  return qFloor(ScreenToUnitFloat(screen));
+}
+
+int64_t SeekableWidget::ScreenToUnitRounded(int screen)
+{
+  return qRound64(ScreenToUnitFloat(screen));
+}
+
+int SeekableWidget::UnitToScreen(int64_t unit)
+{
+  return qFloor(static_cast<double>(unit) * GetScale() * timebase_dbl()) - scroll_;
+}
+
+int SeekableWidget::TimeToScreen(const rational &time)
+{
+  return qFloor(time.toDouble() * GetScale()) - scroll_;
+}
+
+void SeekableWidget::SeekToScreenPoint(int screen)
+{
+  int64_t timestamp = qMax(static_cast<int64_t>(0), ScreenToUnitRounded(screen));
+
+  SetTime(timestamp);
+
+  emit TimeChanged(timestamp);
+}