Increase update rate of track slider

Increases the refresh rate of the track progress bar to 25fps.
This looks much better with moodbars than the previous 1fps.
All the common code that use to run at 1fps still retains that
rate so the overhead due to this is negligible.

src/ui/mainwindow.cpp

@@ -186,6 +186,7 @@ MainWindow::MainWindow(Application* app, SystemTrayIcon* tray_icon, OSD* osd,
       playlistitem_actions_separator_(nullptr),
       library_sort_model_(new QSortFilterProxyModel(this)),
       track_position_timer_(new QTimer(this)),
+      track_slider_timer_(new QTimer(this)),
       was_maximized_(false),
       saved_playback_position_(0),
       saved_playback_state_(Engine::Empty),
@@ -252,6 +253,9 @@ MainWindow::MainWindow(Application* app, SystemTrayIcon* tray_icon, OSD* osd,
   track_position_timer_->setInterval(1000);
   connect(track_position_timer_, SIGNAL(timeout()),
           SLOT(UpdateTrackPosition()));
+  track_slider_timer_->setInterval(40);
+  connect(track_slider_timer_, SIGNAL(timeout()),
+          SLOT(UpdateTrackSliderPosition()));
 
   // Start initialising the player
   qLog(Debug) << "Initialising player";
@@ -508,7 +512,7 @@ MainWindow::MainWindow(Application* app, SystemTrayIcon* tray_icon, OSD* osd,
   connect(ui_->playlist->view(), SIGNAL(BackgroundPropertyChanged()),
           SLOT(RefreshStyleSheet()));
 
-  connect(ui_->track_slider, SIGNAL(ValueChanged(int)), app_->player(),
+  connect(ui_->track_slider, SIGNAL(ValueChangedSeconds(int)), app_->player(),
           SLOT(SeekTo(int)));
 
   // Library connections
@@ -982,6 +986,7 @@ void MainWindow::MediaStopped() {
   tray_icon_->LastFMButtonLoveStateChanged(false);
 
   track_position_timer_->stop();
+  track_slider_timer_->stop();
   ui_->track_slider->SetStopped();
   tray_icon_->SetProgress(0);
   tray_icon_->SetStopped();
@@ -996,6 +1001,7 @@ void MainWindow::MediaPaused() {
   ui_->action_play_pause->setEnabled(true);
 
   track_position_timer_->stop();
+  track_slider_timer_->stop();
 
   tray_icon_->SetPaused();
 }
@@ -1024,6 +1030,7 @@ void MainWindow::MediaPlaying() {
 #endif
 
   track_position_timer_->start();
+  track_slider_timer_->start();
   UpdateTrackPosition();
 }
 
@@ -1297,9 +1304,6 @@ void MainWindow::UpdateTrackPosition() {
     }
   }
 
-  // Update the slider
-  ui_->track_slider->SetValue(position, length);
-
   // Update the tray icon every 10 seconds
   if (position % 10 == 0) {
     qLog(Debug) << "position" << position << "scrobble point" << scrobble_point
@@ -1318,6 +1322,17 @@ void MainWindow::UpdateTrackPosition() {
   }
 }
 
+void MainWindow::UpdateTrackSliderPosition() {
+  PlaylistItemPtr item(app_->player()->GetCurrentItem());
+
+  const int slider_position = std::floor(
+      float(app_->player()->engine()->position_nanosec()) / kNsecPerMsec);
+  const int slider_length = item->Metadata().length_nanosec() / kNsecPerMsec;
+
+  // Update the slider
+  ui_->track_slider->SetValue(slider_position, slider_length);
+}
+
 #ifdef HAVE_LIBLASTFM
 void MainWindow::ScrobbledRadioStream() {
   ui_->action_love->setEnabled(true);
@@ -1830,7 +1845,7 @@ void MainWindow::AddFolder() {
   // Add media
   MimeData* data = new MimeData;
   data->setUrls(QList<QUrl>() << QUrl::fromLocalFile(
-                                     QFileInfo(directory).canonicalFilePath()));
+                    QFileInfo(directory).canonicalFilePath()));
   AddToPlaylist(data);
 }
 
@@ -2216,7 +2231,7 @@ void MainWindow::PlaylistQueue() {
   for (const QModelIndex& proxy_index :
        ui_->playlist->view()->selectionModel()->selectedRows()) {
     indexes << app_->playlist_manager()->current()->proxy()->mapToSource(
-                   proxy_index);
+        proxy_index);
   }
 
   app_->playlist_manager()->current()->queue()->ToggleTracks(indexes);
@@ -2227,7 +2242,7 @@ void MainWindow::PlaylistSkip() {
   for (const QModelIndex& proxy_index :
        ui_->playlist->view()->selectionModel()->selectedRows()) {
     indexes << app_->playlist_manager()->current()->proxy()->mapToSource(
-                   proxy_index);
+        proxy_index);
   }
 
   app_->playlist_manager()->current()->SkipTracks(indexes);

src/ui/mainwindow.h

@@ -194,6 +194,7 @@ signals:
 
   void Seeked(qlonglong microseconds);
   void UpdateTrackPosition();
+  void UpdateTrackSliderPosition();
 
   // Handle visibility of LastFM icons
   void LastFMButtonVisibilityChanged(bool value);
@@ -351,6 +352,7 @@ signals:
   QSortFilterProxyModel* library_sort_model_;
 
   QTimer* track_position_timer_;
+  QTimer* track_slider_timer_;
   QSettings settings_;
 
   bool was_maximized_;

src/widgets/trackslider.cpp

@@ -18,6 +18,7 @@
 #include "config.h"
 #include "trackslider.h"
 #include "ui_trackslider.h"
+#include "core/timeconstants.h"
 #include "core/utilities.h"
 
 #include <QSettings>
@@ -92,7 +93,7 @@ void TrackSlider::SetValue(int elapsed, int total) {
   ui_->slider->setValue(elapsed);
   setting_value_ = false;
 
-  UpdateTimes(elapsed);
+  UpdateTimes(elapsed / kMsecPerSec);
 }
 
 void TrackSlider::UpdateTimes(int elapsed) {
@@ -100,12 +101,14 @@ void TrackSlider::UpdateTimes(int elapsed) {
   // update normally if showing remaining time
   if (show_remaining_time_) {
     ui_->remaining->setText(
-        "-" + Utilities::PrettyTime(ui_->slider->maximum() - elapsed));
+        "-" + Utilities::PrettyTime((ui_->slider->maximum() / kMsecPerSec) -
+                                    elapsed));
   } else {
     // check if slider maximum value is changed before updating
     if (slider_maximum_value_ != ui_->slider->maximum()) {
       slider_maximum_value_ = ui_->slider->maximum();
-      ui_->remaining->setText(Utilities::PrettyTime(ui_->slider->maximum()));
+      ui_->remaining->setText(
+          Utilities::PrettyTime((ui_->slider->maximum() / kMsecPerSec)));
     }
   }
   setEnabled(true);
@@ -128,14 +131,14 @@ void TrackSlider::SetCanSeek(bool can_seek) {
 
 void TrackSlider::Seek(int gap) {
   if (ui_->slider->isEnabled())
-    ui_->slider->setValue(ui_->slider->value() + gap);
+    ui_->slider->setValue(ui_->slider->value() + gap * kMsecPerSec);
 }
 
 void TrackSlider::ValueMaybeChanged(int value) {
   if (setting_value_) return;
 
-  UpdateTimes(value);
-  emit ValueChanged(value);
+  UpdateTimes(value / kMsecPerSec);
+  emit ValueChangedSeconds(value / kMsecPerSec);
 }
 
 bool TrackSlider::event(QEvent* e) {
@@ -156,7 +159,7 @@ void TrackSlider::ToggleTimeDisplay() {
     // we set the value to -1 because the label must be updated
     slider_maximum_value_ = -1;
   }
-  UpdateTimes(ui_->slider->value());
+  UpdateTimes(ui_->slider->value() / kMsecPerSec);
 
   // save this setting
   QSettings s;

src/widgets/trackslider.h

@@ -53,6 +53,7 @@ class TrackSlider : public QWidget {
 
 signals:
   void ValueChanged(int value);
+  void ValueChangedSeconds(int value);
 
  private slots:
   void ValueMaybeChanged(int value);

src/widgets/tracksliderslider.cpp

@@ -17,6 +17,7 @@
 
 #include "tracksliderpopup.h"
 #include "tracksliderslider.h"
+#include "core/timeconstants.h"
 #include "core/utilities.h"
 
 #include <QMouseEvent>
@@ -76,8 +77,8 @@ void TrackSliderSlider::mouseMoveEvent(QMouseEvent* e) {
   int slider_max = gr.right() - slider_length + 1;
 
   mouse_hover_seconds_ = QStyle::sliderValueFromPosition(
-      minimum(), maximum(), e->x() - slider_length / 2 - slider_min + 1,
-      slider_max - slider_min);
+      minimum() / kMsecPerSec, maximum() / kMsecPerSec,
+      e->x() - slider_length / 2 - slider_min + 1, slider_max - slider_min);
 
   popup_->SetText(Utilities::PrettyTime(mouse_hover_seconds_));
   UpdateDeltaTime();
@@ -99,7 +100,7 @@ void TrackSliderSlider::leaveEvent(QEvent* e) {
 
 void TrackSliderSlider::UpdateDeltaTime() {
   if (popup_->isVisible()) {
-    int delta_seconds = mouse_hover_seconds_ - value();
+    int delta_seconds = mouse_hover_seconds_ - (value() / kMsecPerSec);
     popup_->SetSmallText(Utilities::PrettyTimeDelta(delta_seconds));
   }
 }