some code simplification

apps/opencs/view/render/instancemode.cpp

@@ -27,7 +27,7 @@ int CSVRender::InstanceMode::getSubModeFromId (const std::string& id) const
 
 CSVRender::InstanceMode::InstanceMode (WorldspaceWidget *worldspaceWidget, QWidget *parent)
 : EditMode (worldspaceWidget, QIcon (":placeholder"), Mask_Reference, "Instance editing",
-  parent), mSubMode (0), mSelectionMode (0), mDragMode (DragMode_None), mDragAxis (0)
+  parent), mSubMode (0), mSelectionMode (0), mDragMode (DragMode_None), mDragAxis (-1)
 {
 }
 
@@ -165,9 +165,10 @@ bool CSVRender::InstanceMode::primaryEditStartDrag (osg::ref_ptr<TagBase> tag)
     if (CSVRender::ObjectMarkerTag *objectTag = dynamic_cast<CSVRender::ObjectMarkerTag *> (tag.get()))
     {
         mDragAxis = objectTag->mAxis;
-        mDragMode = DragMode_MoveAxis;
     }
     else
+        mDragAxis = -1;
+
     mDragMode = DragMode_Move;
 
     return true;
@@ -197,18 +198,13 @@ void CSVRender::InstanceMode::drag (int diffX, int diffY, double speedFactor)
 
     switch (mDragMode)
     {
-        case DragMode_MoveAxis:
+        case DragMode_Move:
         {
+            if (mDragAxis!=-1)
                 for (int i=0; i<3; ++i)
                     if (i!=mDragAxis)
                         offset[i] = 0;
 
-            // Fall through
-        }
-
-        case DragMode_Move:
-        {
-
             std::vector<osg::ref_ptr<TagBase> > selection =
                 getWorldspaceWidget().getEdited (Mask_Reference);
 
@@ -242,10 +238,7 @@ void CSVRender::InstanceMode::dragCompleted()
 
     switch (mDragMode)
     {
-        case DragMode_Move:
-        case DragMode_MoveAxis:
-
-            description = "Move Instances"; break;
+        case DragMode_Move: description = "Move Instances"; break;
 
         case DragMode_None: break;
     }

apps/opencs/view/render/instancemode.hpp

@@ -19,9 +19,7 @@ namespace CSVRender
             enum DragMode
             {
                 DragMode_None,
-                DragMode_Move,
-                DragMode_MoveAxis
-
+                DragMode_Move
             };
 
             CSVWidget::SceneToolMode *mSubMode;