Unify the width of all visible legends.

* Calculate the minimum width to fit the content before the render pass.
  * Set the actual width of all the legends to the largest of the minimum widths.
  * This resizes the legends to always be the same size and reduces the size of you remove
     the widest legend.

ApplicationCode/ModelVisualization/RivTernarySaturationOverlayItem.cpp

@@ -43,6 +43,7 @@
 RivTernarySaturationOverlayItem::RivTernarySaturationOverlayItem(cvf::Font* font)
     : TitledOverlayFrame(font, 120, 150)    
 {
+    this->computeLayoutAndExtents();
 }
 
 //--------------------------------------------------------------------------------------------------
@@ -53,6 +54,14 @@ RivTernarySaturationOverlayItem::~RivTernarySaturationOverlayItem()
     // Empty destructor to avoid errors with undefined types when cvf::ref's destructor gets called
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+void RivTernarySaturationOverlayItem::computeLayoutAndExtents()
+{
+    this->setMinimumWidth(this->sizeHint().x());
+}
+
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------

ApplicationCode/ModelVisualization/RivTernarySaturationOverlayItem.h

@@ -41,6 +41,7 @@ class RivTernarySaturationOverlayItem : public caf::TitledOverlayFrame
 public:
     explicit RivTernarySaturationOverlayItem(cvf::Font* font);
     ~RivTernarySaturationOverlayItem();
+    virtual void    computeLayoutAndExtents() override;
 
     void setRangeText(const cvf::String& soilRange, const cvf::String& sgasRange, const cvf::String& swatRange);
 

ApplicationCode/ProjectDataModel/RimLegendConfig.cpp

@@ -370,6 +370,7 @@ void RimLegendConfig::updateLegend()
        numDecimalDigits -= static_cast<int>(decadesInRange);
    }
    m_scalarMapperLegend->setTickPrecision(cvf::Math::clamp(numDecimalDigits, 0, 20));
+   m_scalarMapperLegend->computeLayoutAndExtents();
 
    RiaApplication* app = RiaApplication::instance();
    RiaPreferences* preferences = app->preferences();

ApplicationCode/UserInterface/RiuViewer.cpp

@@ -614,6 +614,17 @@ void RiuViewer::addColorLegendToBottomLeftCorner(caf::TitledOverlayFrame* legend
             yPos += item->sizeHint().y() + border + edgeAxisBorderHeight;
         }
     }
+
+    unsigned int requiredLegendWidth = 0u;
+    for (auto legend : m_visibleLegends)
+    {
+        requiredLegendWidth = std::max(requiredLegendWidth, legend->minimumWidth());
+    }
+
+    for (auto legend : m_visibleLegends)
+    {
+        legend->setWidth(requiredLegendWidth);
+    }
 }
 
 //--------------------------------------------------------------------------------------------------