0021941: [CEA 699] Use for Auto Color method on mesh group the same algorithm that this one in GEOM which define colors.

src/SMESHGUI/SMESHGUI.cxx

@@ -174,6 +174,10 @@
 //Refer to KERNEL_SRC/src/SALOMEDSImpl/SALOMEDSImpl_AttributeIOR.cxx
 #define WITHGENERICOBJ
 
+// Below macro, when uncommented, switches on simplified (more performant) algorithm
+// of auto-color picking up
+#define SIMPLE_AUTOCOLOR
+
 //namespace{
   // Declarations
   //=============================================================
@@ -969,11 +973,21 @@
 
     aMainObject->SetAutoColor( true ); // mesh groups are re-colored here
 
+    QList<SALOMEDS::Color> aReservedColors;
+
     SMESH::ListOfGroups aListOfGroups = *aMainObject->GetGroups();
     for( int i = 0, n = aListOfGroups.length(); i < n; i++ )
     {
       SMESH::SMESH_GroupBase_var aGroupObject = aListOfGroups[i];
-      SALOMEDS::Color aColor = aGroupObject->GetColor();
+      //SALOMEDS::Color aColor = aGroupObject->GetColor();
+      
+#ifdef SIMPLE_AUTOCOLOR   // simplified algorithm for auto-colors
+      SALOMEDS::Color aColor = SMESHGUI::getPredefinedUniqueColor();
+#else                     // old algorithm  for auto-colors
+      SALOMEDS::Color aColor = SMESHGUI::getUniqueColor( aReservedColors );
+      aReservedColors.append( aColor );
+#endif                    // SIMPLE_AUTOCOLOR
+
       _PTR(SObject) aGroupSObject = SMESH::FindSObject(aGroupObject);
       if (aGroupSObject) {
         QColor c;
@@ -6539,3 +6553,33 @@ bool SMESHGUI::renameObject( const QString& entry, const QString& name) {
   }
   return false;
 }
+
+
+SALOMEDS::Color SMESHGUI::getPredefinedUniqueColor()
+{
+  static QList<QColor> colors;
+
+  if ( colors.isEmpty() ) {
+
+    for (int s = 0; s < 2 ; s++)
+    {
+      for (int v = 100; v >= 40; v = v - 20)
+      {
+        for (int h = 0; h < 359 ; h = h + 60)
+        {
+          colors.append(QColor::fromHsv(h, 255 - s * 127, v * 255 / 100));
+        }
+      }
+    }
+  }
+  static int currentColor = 0;
+
+  SALOMEDS::Color color;
+  color.R = (double)colors[currentColor].red()   / 255.0;
+  color.G = (double)colors[currentColor].green() / 255.0;
+  color.B = (double)colors[currentColor].blue()  / 255.0;
+
+  currentColor = (currentColor+1) % colors.count();
+
+  return color;
+}

src/SMESHGUI/SMESHGUI.h

@@ -142,6 +142,7 @@ public :
   virtual void                    update( const int );
 
   static SALOMEDS::Color          getUniqueColor( const QList<SALOMEDS::Color>& );
+  static SALOMEDS::Color          getPredefinedUniqueColor();
 
   virtual void                    storeVisualParameters  (int savePoint);
   virtual void                    restoreVisualParameters(int savePoint);

src/SMESHGUI/SMESHGUI_GroupDlg.cxx

@@ -1142,6 +1142,8 @@ bool SMESHGUI_GroupDlg::onApply()
       myGroupOnGeom   = SMESH::SMESH_GroupOnGeom::_nil();
       myGroupOnFilter = SMESH::SMESH_GroupOnFilter::_nil();
       myFilter        = SMESH::Filter::_nil();
+
+      setDefaultGroupColor(); // reset color for case if 'auto-color' feature is enabled.
     }
     else
     {
@@ -2454,15 +2456,20 @@ void SMESHGUI_GroupDlg::setDefaultGroupColor()
 
   bool isAutoColor = myMesh->GetAutoColor();
 
-  QColor aQColor;
+  QColor aQColor = myColorBtn->color();
   if( !isAutoColor )
   {
-    int r = 0, g = 0, b = 0;
+    if ( !aQColor.isValid() ) {
-    SMESH::GetColor( "SMESH", "default_grp_color", r, g, b, QColor( 255, 170, 0 ) );
+      int r = 0, g = 0, b = 0;
-    aQColor.setRgb( r, g, b );
+      SMESH::GetColor( "SMESH", "default_grp_color", r, g, b, QColor( 255, 170, 0 ) );
+      aQColor.setRgb( r, g, b );
+    }
   }
   else
   {
+#ifdef SIMPLE_AUTOCOLOR   // simplified algorithm for auto-colors
+    SALOMEDS::Color aColor = SMESHGUI::getPredefinedUniqueColor();
+#else                     // old algorithm  for auto-colors
     SMESH::ListOfGroups aListOfGroups = *myMesh->GetGroups();
 
     QList<SALOMEDS::Color> aReservedColors;
@@ -2474,6 +2481,8 @@ void SMESHGUI_GroupDlg::setDefaultGroupColor()
     }
 
     SALOMEDS::Color aColor = SMESHGUI::getUniqueColor( aReservedColors );
+#endif                    // SIMPLE_AUTOCOLOR
+
     aQColor.setRgb( (int)( aColor.R * 255.0 ),
                     (int)( aColor.G * 255.0 ),
                     (int)( aColor.B * 255.0 ) );