Make SettingsAction and toolbar QPointers (#238)

Convert SettingsAction and HorizontalToolbarAction members to QPointer types and create them with new, updating construction and all call sites accordingly. Update ScatterplotPlugin::getSettingsAction() to return a reference to the dereferenced QPointer. Replace direct member accesses with pointer-style (->) calls and adjust several call sites to obtain SettingsAction via dynamic_cast from parent()/parent()->parent() where appropriate (DatasetsAction, DensityPlotAction). Miscellaneous fixes: update toolbar widget creation, parent assignment, and serialization calls to use the new pointer members; small formatting and reference adjustments throughout impacted files.

Author: ThomasKroes

src/DatasetsAction.cpp

@@ -28,7 +28,7 @@ DatasetsAction::DatasetsAction(QObject* parent, const QString& title) :
     if (scatterplotPlugin == nullptr)
         return;
 
-    auto& settingsAction    = scatterplotPlugin->getSettingsAction();
+    auto& settingsAction    = *dynamic_cast<SettingsAction*>(parent);
     auto& plotAction        = settingsAction.getPlotAction();
     auto& pointPlotAction   = plotAction.getPointPlotAction();
 
@@ -132,7 +132,7 @@ void DatasetsAction::setupPositionDatasetPickerAction(ScatterplotPlugin* scatter
 
 void DatasetsAction::setupColorDatasetPickerAction(ScatterplotPlugin* scatterplotPlugin)
 {
-    auto& settingsAction = scatterplotPlugin->getSettingsAction();
+    auto& settingsAction = *dynamic_cast<SettingsAction*>(parent());
 
     _colorDatasetPickerAction.setFilterFunction([this, scatterplotPlugin](mv::Dataset<DatasetImpl> dataset) -> bool {
         if (!(dataset->getDataType() == PointType || dataset->getDataType() == ColorType || dataset->getDataType() == ClusterType))

src/DensityPlotAction.cpp

@@ -30,15 +30,15 @@ void DensityPlotAction::initialize(ScatterplotPlugin* scatterplotPlugin)
     _scatterplotPlugin = scatterplotPlugin;
 
     const auto computeDensity = [this]() -> void {
-        if (static_cast<std::int32_t>(_scatterplotPlugin->getSettingsAction().getRenderModeAction().getCurrentIndex()) == ScatterplotWidget::RenderMode::SCATTERPLOT)
+        if (static_cast<std::int32_t>(dynamic_cast<SettingsAction*>(parent()->parent())->getRenderModeAction().getCurrentIndex()) == ScatterplotWidget::RenderMode::SCATTERPLOT)
             return;
 
         _scatterplotPlugin->getScatterplotWidget().setSigma(_sigmaAction.getValue());
 
         const auto maxDensity = _scatterplotPlugin->getScatterplotWidget().getDensityRenderer().getMaxDensity();
 
         if (maxDensity > 0)
-            _scatterplotPlugin->getSettingsAction().getColoringAction().getColorMap1DAction().getRangeAction(ColorMapAction::Axis::X).setRange({ 0.0f, maxDensity });
+            dynamic_cast<SettingsAction*>(parent()->parent())->getColoringAction().getColorMap1DAction().getRangeAction(ColorMapAction::Axis::X).setRange({ 0.0f, maxDensity });
     };
 
     connect(&_sigmaAction, &DecimalAction::valueChanged, this, computeDensity);
@@ -59,7 +59,7 @@ void DensityPlotAction::initialize(ScatterplotPlugin* scatterplotPlugin)
         computeDensity();
     });
 
-    connect(&_scatterplotPlugin->getSettingsAction().getRenderModeAction(), &OptionAction::currentIndexChanged, this, computeDensity);
+    connect(&dynamic_cast<SettingsAction*>(parent()->parent())->getRenderModeAction(), &OptionAction::currentIndexChanged, this, computeDensity);
 
     updateSigmaAction();
     computeDensity();