implemented playback controls

app/widget/panel/panel.cpp

@@ -47,6 +47,26 @@ void PanelWidget::ZoomOut()
 {
 }
 
+void PanelWidget::GoToStart()
+{
+}
+
+void PanelWidget::PrevFrame()
+{
+}
+
+void PanelWidget::PlayPause()
+{
+}
+
+void PanelWidget::NextFrame()
+{
+}
+
+void PanelWidget::GoToEnd()
+{
+}
+
 void PanelWidget::SetTitle(const QString &t)
 {
   title_ = t;

app/widget/panel/panel.h

@@ -62,6 +62,23 @@ public:
    * no-op.
    */
   virtual void ZoomOut();
+
+  virtual void GoToStart();
+
+  virtual void PrevFrame();
+
+  /**
+   * @brief Called whenever this panel is focused and user uses "Play/Pause" (either in menus or as a keyboard shortcut)
+   *
+   * This function is up to the Panel's interpretation of what the user intends to zoom out of. Default behavior is a
+   * no-op.
+   */
+  virtual void PlayPause();
+
+  virtual void NextFrame();
+
+  virtual void GoToEnd();
+
 protected:
   /**
    * @brief Set panel's title

app/widget/playbackcontrols/playbackcontrols.cpp

@@ -82,13 +82,11 @@ PlaybackControls::PlaybackControls(QWidget *parent) :
   play_btn_->setIcon(olive::icon::Play);
   playpause_stack_->addWidget(play_btn_);
   connect(play_btn_, SIGNAL(clicked(bool)), this, SIGNAL(PlayClicked()));
-  connect(play_btn_, SIGNAL(clicked(bool)), this, SLOT(PlayPauseClickedInternal()));
 
   pause_btn_ = new QPushButton();
   pause_btn_->setIcon(olive::icon::Pause);
   playpause_stack_->addWidget(pause_btn_);
   connect(pause_btn_, SIGNAL(clicked(bool)), this, SIGNAL(PauseClicked()));
-  connect(pause_btn_, SIGNAL(clicked(bool)), this, SLOT(PlayPauseClickedInternal()));
 
   // Default to showing play button
   playpause_stack_->setCurrentWidget(play_btn_);
@@ -141,12 +139,13 @@ void PlaybackControls::SetTime(const int64_t &r)
   cur_tc_lbl_->setText(olive::timestamp_to_timecode(r, time_base_, kTimecodeDisplay));
 }
 
-void PlaybackControls::PlayPauseClickedInternal()
+void PlaybackControls::ShowPauseButton()
 {
-  if (sender() == play_btn_) {
-    // Play was clicked, toggle to pause
-    playpause_stack_->setCurrentWidget(pause_btn_);
-  } else {
-    playpause_stack_->setCurrentWidget(play_btn_);
-  }
+  // Play was clicked, toggle to pause
+  playpause_stack_->setCurrentWidget(pause_btn_);
+}
+
+void PlaybackControls::ShowPlayButton()
+{
+  playpause_stack_->setCurrentWidget(play_btn_);
 }

app/widget/playbackcontrols/playbackcontrols.h

@@ -49,6 +49,10 @@ public:
 public slots:
   void SetTime(const int64_t &r);
 
+  void ShowPauseButton();
+
+  void ShowPlayButton();
+
 signals:
   /**
    * @brief Signal emitted when "Go to Start" is clicked
@@ -95,7 +99,7 @@ private:
   QStackedWidget* playpause_stack_;
 
 private slots:
-  void PlayPauseClickedInternal();
+
 
 };
 

app/widget/timeruler/timeruler.h

@@ -56,6 +56,9 @@ protected:
   virtual void mouseMoveEvent(QMouseEvent *event) override;
 
 signals:
+  /**
+   * @brief Signal emitted whenever the time changes on this ruler, either by user or programatically
+   */
   void TimeChanged(int64_t);
 
 private:

app/widget/viewer/viewer.cpp

@@ -99,7 +99,21 @@ void ViewerWidget::SetScale(const double &scale_)
 void ViewerWidget::SetTime(const int64_t &time)
 {
   ruler_->SetTime(time);
-  RulerTimeChange(time);
+  UpdateTimeInternal(time);
+}
+
+void ViewerWidget::TogglePlayPause()
+{
+  if (IsPlaying()) {
+    Pause();
+  } else {
+    Play();
+  }
+}
+
+bool ViewerWidget::IsPlaying()
+{
+  return playback_timer_.isActive();
 }
 
 void ViewerWidget::SetTexture(GLuint tex)
@@ -107,7 +121,7 @@ void ViewerWidget::SetTexture(GLuint tex)
   gl_widget_->SetTexture(tex);
 }
 
-void ViewerWidget::RulerTimeChange(int64_t i)
+void ViewerWidget::UpdateTimeInternal(int64_t i)
 {
   rational time_set = rational(i) * time_base_;
 
@@ -116,6 +130,13 @@ void ViewerWidget::RulerTimeChange(int64_t i)
   emit TimeChanged(time_set);
 }
 
+void ViewerWidget::RulerTimeChange(int64_t i)
+{
+  Pause();
+
+  UpdateTimeInternal(i);
+}
+
 void ViewerWidget::Play()
 {
   if (time_base_.isNull()) {
@@ -127,11 +148,15 @@ void ViewerWidget::Play()
   start_timestamp_ = ruler_->Time();
 
   playback_timer_.start();
+
+  controls_->ShowPauseButton();
 }
 
 void ViewerWidget::Pause()
 {
   playback_timer_.stop();
+
+  controls_->ShowPlayButton();
 }
 
 void ViewerWidget::GoToStart()

app/widget/viewer/viewer.h

@@ -53,6 +53,10 @@ public:
 
   void SetTime(const int64_t& time);
 
+  void TogglePlayPause();
+
+  bool IsPlaying();
+
 public slots:
   /**
    * @brief Set the texture to draw and draw it
@@ -63,6 +67,18 @@ public slots:
    */
   void SetTexture(GLuint tex);
 
+  void GoToStart();
+
+  void PrevFrame();
+
+  void Play();
+
+  void Pause();
+
+  void NextFrame();
+
+  void GoToEnd();
+
 signals:
   void TimeChanged(const rational&);
 
@@ -70,6 +86,8 @@ protected:
   virtual void resizeEvent(QResizeEvent *event) override;
 
 private:
+  void UpdateTimeInternal(int64_t i);
+
   ViewerGLWidget* gl_widget_;
 
   PlaybackControls* controls_;
@@ -88,19 +106,7 @@ private:
   int64_t start_timestamp_;
 
 private slots:
-  void RulerTimeChange(int64_t i);
-
-  void Play();
-
-  void Pause();
-
-  void GoToStart();
-
-  void PrevFrame();
-
-  void NextFrame();
-
-  void GoToEnd();
+  void RulerTimeChange(int64_t);
 
   void PlaybackTimerUpdate();