visual formula editor: implement selection by mouse

starmath/inc/view.hxx

@@ -103,6 +103,7 @@ public:
 
     // Window
     virtual void    MouseButtonDown(const MouseEvent &rMEvt);
+    virtual void    MouseMove(const MouseEvent &rMEvt);
     virtual void    GetFocus();
     virtual void    LoseFocus();
 

starmath/source/view.cxx

@@ -182,9 +182,7 @@ void SmGraphicWindow::MouseButtonDown(const MouseEvent& rMEvt)
             return;
 
         if (IsInlineEditEnabled()) {
-            // if it was clicked inside the formula then get the appropriate node
-            if (pTree->OrientedDist(aPos) <= 0)
-                pViewShell->GetDoc()->GetCursor().MoveTo(this, aPos, !rMEvt.IsShift());
+            pViewShell->GetDoc()->GetCursor().MoveTo(this, aPos, !rMEvt.IsShift());
             return;
         }
         const SmNode *pNode = 0;
@@ -214,6 +212,22 @@ void SmGraphicWindow::MouseButtonDown(const MouseEvent& rMEvt)
     }
 }
 
+void SmGraphicWindow::MouseMove(const MouseEvent &rMEvt)
+{
+    ScrollableWindow::MouseMove(rMEvt);
+
+    if (rMEvt.IsLeft() && IsInlineEditEnabled())
+    {
+        Point aPos(PixelToLogic(rMEvt.GetPosPixel()) - GetFormulaDrawPos());
+        pViewShell->GetDoc()->GetCursor().MoveTo(this, aPos, false);
+
+        CaretBlinkStop();
+        SetIsCursorVisible(true);
+        CaretBlinkStart();
+        RepaintViewShellDoc();
+    }
+}
+
 bool SmGraphicWindow::IsInlineEditEnabled() const
 {
     return pViewShell->IsInlineEditEnabled();