Make it possible to enable/disable playback in loop

src/app/3d/qgs3danimationwidget.cpp

@@ -33,6 +33,7 @@ Qgs3DAnimationWidget::Qgs3DAnimationWidget( QWidget *parent )
   btnEditKeyframe->setIcon( QIcon( QgsApplication::iconPath( "symbologyEdit.svg" ) ) );
   btnPlayPause->setIcon( QIcon( QgsApplication::iconPath( "mTaskRunning.svg" ) ) );
   btnDuplicateKeyframe->setIcon( QIcon( QgsApplication::iconPath( "mActionEditCopy.svg" ) ) );
+  btnRepeat->setIcon( QIcon( QgsApplication::iconPath( "mActionRefresh.svg" ) ) );
 
   cboKeyframe->addItem( tr( "<none>" ) );
 
@@ -48,6 +49,8 @@ Qgs3DAnimationWidget::Qgs3DAnimationWidget( QWidget *parent )
   btnPlayPause->setCheckable( true );
   connect( btnPlayPause, &QToolButton::clicked, this, &Qgs3DAnimationWidget::onPlayPause );
 
+  btnRepeat->setCheckable( true );
+
   connect( sliderTime, &QSlider::valueChanged, this, &Qgs3DAnimationWidget::onSliderValueChanged );
 
   connect( cboKeyframe, qgis::overload<int>::of( &QComboBox::currentIndexChanged ), this, &Qgs3DAnimationWidget::onKeyframeChanged );
@@ -139,8 +142,21 @@ void Qgs3DAnimationWidget::onPlayPause()
 
 void Qgs3DAnimationWidget::onAnimationTimer()
 {
-  float duration = sliderTime->maximum();
-  sliderTime->setValue( sliderTime->value() >= duration ? 0 : sliderTime->value() + 1 );
+  if ( sliderTime->value() >= sliderTime->maximum() )
+  {
+    if ( btnRepeat->isChecked() )
+      sliderTime->setValue( 0 );
+    else
+    {
+      // stop playback
+      onPlayPause();
+      btnPlayPause->setChecked( false );
+    }
+  }
+  else
+  {
+    sliderTime->setValue( sliderTime->value() + 1 );
+  }
 }
 
 
@@ -173,7 +189,12 @@ void Qgs3DAnimationWidget::onCameraChanged()
 
 void Qgs3DAnimationWidget::onKeyframeChanged()
 {
-  if ( cboKeyframe->currentIndex() <= 0 )
+  bool hasKeyframe = cboKeyframe->currentIndex() > 0;
+  btnRemoveKeyframe->setEnabled( hasKeyframe );
+  btnEditKeyframe->setEnabled( hasKeyframe );
+  btnDuplicateKeyframe->setEnabled( hasKeyframe );
+
+  if ( !hasKeyframe )
     return;
 
   // jump to the camera view of the keyframe

src/ui/3d/animation3dwidget.ui

@@ -106,6 +106,16 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QToolButton" name="btnRepeat">
+       <property name="toolTip">
+        <string>Repeat</string>
+       </property>
+       <property name="text">
+        <string>...</string>
+       </property>
+      </widget>
+     </item>
     </layout>
    </item>
   </layout>