Fixed scrolling bug

3 files changed, 53 insertions, 6 deletions

diff --git a/basctl/source/basicide/baside2b.cxx b/basctl/source/basicide/baside2b.cxx
index 2a4d8ce6d698..a80e9e454c2a 100644
--- a/basctl/source/basicide/baside2b.cxx
+++ b/basctl/source/basicide/baside2b.cxx
@@ -333,6 +333,7 @@ void EditorWindow::Resize()
             pEditView->SetStartDocPos( aStartDocPos );
             pEditView->ShowCursor();
             pModulWindow->GetBreakPointWindow().GetCurYOffset() = aStartDocPos.Y();
+            pModulWindow->GetLineNumberWindow().GetCurYOffset() = aStartDocPos.Y();
         }
         InitScrollBars();
         if ( nVisY != pEditView->GetStartDocPos().Y() )
@@ -574,6 +575,7 @@ void EditorWindow::CreateEditEngine()
     pEditView->SetStartDocPos( Point( 0, 0 ) );
     pEditView->SetSelection( TextSelection() );
     pModulWindow->GetBreakPointWindow().GetCurYOffset() = 0;
+    pModulWindow->GetLineNumberWindow().GetCurYOffset() = 0;
     pEditEngine->SetUpdateMode( sal_True );
     Update();   // has only been invalidated at UpdateMode = sal_True
 
@@ -661,7 +663,9 @@ void EditorWindow::Notify( SfxBroadcaster& /*rBC*/, const SfxHint& rHint )
             pModulWindow->GetEditVScrollBar().SetThumbPos( pEditView->GetStartDocPos().Y() );
             pModulWindow->GetBreakPointWindow().DoScroll
                 ( 0, pModulWindow->GetBreakPointWindow().GetCurYOffset() - pEditView->GetStartDocPos().Y() );
-            pModulWindow->GetLineNumberWindow().Invalidate();
+            pModulWindow->GetLineNumberWindow().DoScroll
+                ( 0, pModulWindow->GetLineNumberWindow().GetCurYOffset() - pEditView->GetStartDocPos().Y() );
+            pModulWindow->Invalidate();
         }
         else if( rTextHint.GetId() == TEXT_HINT_TEXTHEIGHTCHANGED )
         {
@@ -1681,6 +1685,7 @@ IMPL_LINK( ComplexEditorWindow, ScrollHdl, ScrollBar *, pCurScrollBar )
         long nDiff = aEdtWindow.GetEditView()->GetStartDocPos().Y() - pCurScrollBar->GetThumbPos();
         aEdtWindow.GetEditView()->Scroll( 0, nDiff );
         aBrkWindow.DoScroll( 0, nDiff );
+        aLineNumberWindow.DoScroll(0, nDiff);
         aEdtWindow.GetEditView()->ShowCursor( sal_False, sal_True );
         pCurScrollBar->SetThumbPos( aEdtWindow.GetEditView()->GetStartDocPos().Y() );
     }
diff --git a/basctl/source/basicide/linenumberwindow.cxx b/basctl/source/basicide/linenumberwindow.cxx
index 5168da1b092a..deba85df526c 100644
--- a/basctl/source/basicide/linenumberwindow.cxx
+++ b/basctl/source/basicide/linenumberwindow.cxx
@@ -7,7 +7,8 @@
 LineNumberWindow::LineNumberWindow( Window* pParent, ModulWindow* pModulWin ) :
   Window( pParent, WB_BORDER ),
   pModulWindow(pModulWin),
-  nWidth(1)
+  nWidth(1),
+  nCurYOffset(0)
 {
   SetBackground(Wallpaper(GetSettings().GetStyleSettings().GetFieldColor()));
 }
@@ -16,6 +17,9 @@ LineNumberWindow::~LineNumberWindow() { }
 
 void LineNumberWindow::Paint( const Rectangle& )
 {
+  if(SyncYOffset())
+    return;
+
   ExtTextEngine* txtEngine = pModulWindow->GetEditEngine();
   if(!txtEngine)
     return;
@@ -27,9 +31,9 @@ void LineNumberWindow::Paint( const Rectangle& )
   GetParent()->Resize();
 
   ulong windowHeight = GetOutputSize().Height();
-  ulong startY = txtView->GetStartDocPos().Y();
   ulong nLineHeight = GetTextHeight();
 
+  ulong startY = txtView->GetStartDocPos().Y();
   ulong nStartLine = startY / nLineHeight + 1;
   ulong nEndLine = (startY + windowHeight) / nLineHeight + 1;
 
@@ -38,8 +42,9 @@ void LineNumberWindow::Paint( const Rectangle& )
 
   nWidth = String::CreateFromInt64(nEndLine).Len() * 10;
 
-  for(ulong i = nStartLine, y = 0; i < nEndLine; ++i, y += nLineHeight)
-    DrawText(Point(0, y), String::CreateFromInt64(i));
+  sal_Int64 y = (nStartLine - 1) * nLineHeight;
+  for(ulong i = nStartLine; i <= nEndLine; ++i, y += nLineHeight)
+    DrawText(Point(0, y - nCurYOffset), String::CreateFromInt64(i));
 }
 
 void LineNumberWindow::DataChanged(DataChangedEvent const & rDCEvt)
@@ -56,3 +61,34 @@ void LineNumberWindow::DataChanged(DataChangedEvent const & rDCEvt)
     }
   }
 }
+
+void LineNumberWindow::DoScroll(long nHorzScroll, long nVertScroll)
+{
+  nCurYOffset -= nVertScroll;
+  Window::Scroll(nHorzScroll, nVertScroll);
+}
+
+long& LineNumberWindow::GetCurYOffset()
+{
+  return nCurYOffset;
+}
+
+bool LineNumberWindow::SyncYOffset()
+{
+  TextView* pView = pModulWindow->GetEditView();
+  if (!pView)
+    return false;
+
+  long nViewYOffset = pView->GetStartDocPos().Y();
+  if (nCurYOffset == nViewYOffset)
+    return false;
+
+  nCurYOffset = nViewYOffset;
+  Invalidate();
+  return true;
+}
+
+ulong LineNumberWindow::GetWidth()
+{
+  return (nWidth < 20 ? 20 : nWidth);
+}
diff --git a/basctl/source/basicide/linenumberwindow.hxx b/basctl/source/basicide/linenumberwindow.hxx
index 885ea1485542..fd30171a0d20 100644
--- a/basctl/source/basicide/linenumberwindow.hxx
+++ b/basctl/source/basicide/linenumberwindow.hxx
@@ -10,6 +10,7 @@ class LineNumberWindow : public Window
 private:
   ModulWindow* pModulWindow;
   ulong nWidth;
+  long nCurYOffset;
 
   virtual void DataChanged(DataChangedEvent const & rDCEvt);
 
@@ -20,7 +21,12 @@ public:
   LineNumberWindow( Window* pParent, ModulWindow* pModulWin );
   ~LineNumberWindow();
 
-  ulong GetWidth() { return (nWidth < 20 ? 20 : nWidth); }
+  void DoScroll( long nHorzScroll, long nVertScroll );
+
+  bool SyncYOffset();
+  long& GetCurYOffset();
+
+  ulong GetWidth();
 };
 
 #endif // BASICIDE_LINENUMBERWINDOW_HXX