Fix the flicker in a better way which makes closed subfolder count updating

work again. We now keep a map of Folders to FolderTreeItems, the linear
search is just too painfull for something that is called this often.

svn path=/trunk/kdepim/; revision=344093

kmfoldertree.cpp

@@ -71,7 +71,8 @@ KMFolderTreeItem::KMFolderTreeItem( KFolderTreeItem *parent, const QString & nam
   setPixmap( 0, normalIcon() );
 }
 
-KMFolderTreeItem::~KMFolderTreeItem() {
+KMFolderTreeItem::~KMFolderTreeItem() 
+{
 }
 
 static KFolderTreeItem::Protocol protocolFor( KMFolderType t ) {
@@ -195,6 +196,9 @@ void KMFolderTreeItem::init()
   }
   if ( !mFolder->isSystemFolder() )
     setRenameEnabled( 0, false );
+
+  KMFolderTree* tree = static_cast<KMFolderTree*>( listView() );
+  tree->insertIntoFolderToItemMap( mFolder, this );
 }
 
 void KMFolderTreeItem::adjustUnreadCount( int newUnreadCount ) {
@@ -459,6 +463,7 @@ void KMFolderTree::reload(bool openFolders)
     if ( fti->isSelected() )
       selected = fti->folder();
   }
+  mFolderToItem.clear();
   clear();
 
   // construct the root of the local folders
@@ -682,6 +687,7 @@ void KMFolderTree::slotFolderRemoved(KMFolder *aFolder)
     if (!qlvi) qlvi = fti->itemBelow();
     doFolderSelected( qlvi );
   }
+  removeFromFolderToItemMap( aFolder );
   delete fti;
 }
 
@@ -869,18 +875,6 @@ void KMFolderTree::resizeEvent(QResizeEvent* e)
   KListView::resizeEvent(e);
 }
 
-//-----------------------------------------------------------------------------
-QListViewItem* KMFolderTree::indexOfFolder(const KMFolder* folder)
-{
-   QListViewItem *i  = firstChild();
-   while ( i ) {
-      if ( static_cast<KMFolderTreeItem*>(i)->folder() == folder )
-         return i;
-      i = i->itemBelow();
-   }
-   return 0;
-}
-
 //-----------------------------------------------------------------------------
 // show context menu
 void KMFolderTree::slotContextMenuRequested( QListViewItem *lvi,

kmfoldertree.h

@@ -113,8 +113,14 @@ public:
   virtual void addDirectory( KMFolderDir *fdir, KMFolderTreeItem* parent );
 
   /** Find index of given folder. Returns 0 if not found */
-  virtual QListViewItem* indexOfFolder(const KMFolder*);
-
+  virtual QListViewItem* indexOfFolder( const KMFolder* folder ) const
+  {
+     if ( mFolderToItem.contains( folder ) )
+       return mFolderToItem[ folder ];
+     else
+       return 0;
+  }
+  
   /** create a folderlist */
   void createFolderList( QStringList *str,
                          QValueList<QGuardedPtr<KMFolder> > *folders,
@@ -157,6 +163,16 @@ public:
   /** Select the folder and make sure it's visible */
   void showFolder( KMFolder* );
 
+  void insertIntoFolderToItemMap( const KMFolder *folder, KMFolderTreeItem* item )
+  {
+    mFolderToItem.insert( folder, item );
+  }
+
+  void removeFromFolderToItemMap( const KMFolder *folder )
+  {
+    mFolderToItem.remove( folder );
+  }
+  
 signals:
   /** The selected folder has changed */
   void folderSelected(KMFolder*);
@@ -314,6 +330,7 @@ private:
   bool mShowPopupAfterDnD;
   KMMainWidget *mMainWidget;
   bool mReloading;
+  QMap<const KMFolder*, KMFolderTreeItem*> mFolderToItem;
 };
 
 #endif