add initial code for line selection

Author: sbvis

src/ScatterplotWidget.cpp

@@ -60,6 +60,7 @@ ScatterplotWidget::ScatterplotWidget(mv::plugin::ViewPlugin* parentPlugin) :
     _pixelSelectionTool.setEnabled(true);
     _pixelSelectionTool.setMainColor(QColor(Qt::black));
     _pixelSelectionTool.setFixedBrushRadiusModifier(Qt::AltModifier);
+    _pixelSelectionTool.setFixedLineWidthModifier(Qt::AltModifier);
 
     connect(&_pixelSelectionTool, &PixelSelectionTool::shapeChanged, [this]() {
         if (isInitialized())
@@ -126,6 +127,7 @@ ScatterplotWidget::ScatterplotWidget(mv::plugin::ViewPlugin* parentPlugin) :
     _samplerPixelSelectionTool.setEnabled(true);
     _samplerPixelSelectionTool.setMainColor(QColor(Qt::black));
     _samplerPixelSelectionTool.setFixedBrushRadiusModifier(Qt::AltModifier);
+    _samplerPixelSelectionTool.setFixedLineWidthModifier(Qt::AltModifier);
 
     getPointRendererNavigator().setEnabled(true);
 

src/SelectionAction.cpp

@@ -24,6 +24,7 @@ SelectionAction::SelectionAction(QObject* parent, const QString& title) :
 
     addAction(&_pixelSelectionAction.getTypeAction());
     addAction(&_pixelSelectionAction.getBrushRadiusAction());
+    addAction(&_pixelSelectionAction.getLineWidthAction());
     addAction(&_pixelSelectionAction.getModifierAction(), OptionAction::HorizontalButtons);
     addAction(&_pixelSelectionAction.getSelectAction());
     addAction(&_pixelSelectionAction.getNotifyDuringSelectionAction());
@@ -67,6 +68,7 @@ void SelectionAction::initialize(ScatterplotPlugin* scatterplotPlugin)
 
     getPixelSelectionAction().initialize(&scatterplotWidget, &scatterplotWidget.getPixelSelectionTool(), {
         PixelSelectionType::Rectangle,
+        PixelSelectionType::Line,
         PixelSelectionType::Brush,
         PixelSelectionType::Lasso,
         PixelSelectionType::Polygon