6 files changed, 69 insertions, 9 deletions

diff --git a/indra/llui/llscrollcontainer.cpp b/indra/llui/llscrollcontainer.cpp
index 20bed050ad..9b7e30bb04 100644
--- a/indra/llui/llscrollcontainer.cpp
+++ b/indra/llui/llscrollcontainer.cpp
@@ -389,10 +389,17 @@ void LLScrollContainer::calcVisibleSize( S32 *visible_width, S32 *visible_height
 		{
 			*show_h_scrollbar = TRUE;
 			*visible_height -= scrollbar_size;
-			// Note: Do *not* recompute *show_v_scrollbar here because with
-			// the (- scrollbar_size) we just did we will always add a vertical scrollbar
-			// even if the height of the items is actually less than the visible size.
-			// Fear not though: there's enough calcVisibleSize() calls to add a vertical slider later.
+
+			// The view inside the scroll container should not be extended
+			// to container's full height to ensure the correct computation
+			// of *show_v_scrollbar after subtracting horizontal scrollbar_size.
+
+			// Must retest now that visible_height has changed
+			if( !*show_v_scrollbar && ((doc_height - *visible_height) > 1) )
+			{
+				*show_v_scrollbar = TRUE;
+				*visible_width -= scrollbar_size;
+			}
 		}
 	}
 }
diff --git a/indra/llui/llscrollcontainer.h b/indra/llui/llscrollcontainer.h
index 3aa79cc255..d87c95b3d7 100644
--- a/indra/llui/llscrollcontainer.h
+++ b/indra/llui/llscrollcontainer.h
@@ -91,7 +91,7 @@ public:
 	void			setReserveScrollCorner( BOOL b ) { mReserveScrollCorner = b; }
 	LLRect			getVisibleContentRect();
 	LLRect			getContentWindowRect();
-	const LLRect&	getScrolledViewRect() const { return mScrolledView ? mScrolledView->getRect() : LLRect::null; }
+	virtual const LLRect	getScrolledViewRect() const { return mScrolledView ? mScrolledView->getRect() : LLRect::null; }
 	void			pageUp(S32 overlap = 0);
 	void			pageDown(S32 overlap = 0);
 	void			goToTop();
@@ -116,6 +116,9 @@ public:
 	
 	bool autoScroll(S32 x, S32 y);
 
+protected:
+	LLView*		mScrolledView;
+
 private:
 	// internal scrollbar handlers
 	virtual void scrollHorizontal( S32 new_pos );
@@ -124,7 +127,6 @@ private:
 	void calcVisibleSize( S32 *visible_width, S32 *visible_height, BOOL* show_h_scrollbar, BOOL* show_v_scrollbar ) const;
 
 	LLScrollbar* mScrollbar[SCROLLBAR_COUNT];
-	LLView*		mScrolledView;
 	S32			mSize;
 	BOOL		mIsOpaque;
 	LLUIColor	mBackgroundColor;
diff --git a/indra/newview/llfolderview.cpp b/indra/newview/llfolderview.cpp
index 4a42bb2c24..6c4b781122 100644
--- a/indra/newview/llfolderview.cpp
+++ b/indra/newview/llfolderview.cpp
@@ -165,6 +165,33 @@ void LLCloseAllFoldersFunctor::doItem(LLFolderViewItem* item)
 { }
 
 ///----------------------------------------------------------------------------
+/// Class LLFolderViewScrollContainer
+///----------------------------------------------------------------------------
+
+// virtual
+const LLRect LLFolderViewScrollContainer::getScrolledViewRect() const
+{
+	LLRect rect = LLRect::null;
+	if (mScrolledView)
+	{
+		LLFolderView* folder_view = dynamic_cast<LLFolderView*>(mScrolledView);
+		if (folder_view)
+		{
+			S32 height = folder_view->mRunningHeight;
+
+			rect = mScrolledView->getRect();
+			rect.setLeftTopAndSize(rect.mLeft, rect.mTop, rect.getWidth(), height);
+		}
+	}
+
+	return rect;
+}
+
+LLFolderViewScrollContainer::LLFolderViewScrollContainer(const LLScrollContainer::Params& p)
+:	LLScrollContainer(p)
+{}
+
+///----------------------------------------------------------------------------
 /// Class LLFolderView
 ///----------------------------------------------------------------------------
 LLFolderView::Params::Params()
@@ -535,6 +562,7 @@ void LLFolderView::reshape(S32 width, S32 height, BOOL called_from_parent)
 	{
 		width = scroll_rect.getWidth();
 	}
+
 	LLView::reshape(width, height, called_from_parent);
 	mReshapeSignal(mSelectedItems, FALSE);
 }
diff --git a/indra/newview/llfolderview.h b/indra/newview/llfolderview.h
index 1d018b5e6a..5c5a3a894f 100644
--- a/indra/newview/llfolderview.h
+++ b/indra/newview/llfolderview.h
@@ -44,6 +44,7 @@
 #include "lldepthstack.h"
 #include "lleditmenuhandler.h"
 #include "llfontgl.h"
+#include "llscrollcontainer.h"
 #include "lltooldraganddrop.h"
 #include "llviewertexture.h"
 
@@ -54,10 +55,28 @@ class LLInventoryModel;
 class LLPanel;
 class LLLineEditor;
 class LLMenuGL;
-class LLScrollContainer;
 class LLUICtrl;
 class LLTextBox;
 
+/**
+ * Class LLFolderViewScrollContainer
+ *
+ * A scroll container which provides the information about the height
+ * of currently displayed folder view contents.
+ * Used for updating vertical scroll bar visibility in inventory panel.
+ * See LLScrollContainer::calcVisibleSize().
+ */
+class LLFolderViewScrollContainer : public LLScrollContainer
+{
+public:
+	/*virtual*/ ~LLFolderViewScrollContainer() {};
+	/*virtual*/ const LLRect getScrolledViewRect() const;
+
+protected:
+	LLFolderViewScrollContainer(const LLScrollContainer::Params& p);
+	friend class LLUICtrlFactory;
+};
+
 //~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 // Class LLFolderView
 //
@@ -81,6 +100,9 @@ public:
 
 		Params();
 	};
+
+	friend class LLFolderViewScrollContainer;
+
 	LLFolderView(const Params&);
 	virtual ~LLFolderView( void );
 
diff --git a/indra/newview/llinventorypanel.cpp b/indra/newview/llinventorypanel.cpp
index 01a8ecfb5d..c47b74815f 100644
--- a/indra/newview/llinventorypanel.cpp
+++ b/indra/newview/llinventorypanel.cpp
@@ -206,10 +206,11 @@ void LLInventoryPanel::initFromParams(const LLInventoryPanel::Params& params)
 		scroller_view_rect.translate(-scroller_view_rect.mLeft, -scroller_view_rect.mBottom);
 		LLScrollContainer::Params scroller_params(params.scroll());
 		scroller_params.rect(scroller_view_rect);
-		mScroller = LLUICtrlFactory::create<LLScrollContainer>(scroller_params);
+		mScroller = LLUICtrlFactory::create<LLFolderViewScrollContainer>(scroller_params);
 		addChild(mScroller);
 		mScroller->addChild(mFolderRoot);
 		mFolderRoot->setScrollContainer(mScroller);
+		mFolderRoot->setFollowsAll();
 		mFolderRoot->addChild(mFolderRoot->mStatusTextBox);
 	}
 
diff --git a/indra/newview/llpanelobjectinventory.cpp b/indra/newview/llpanelobjectinventory.cpp
index 98ea680504..f3ecba7185 100644
--- a/indra/newview/llpanelobjectinventory.cpp
+++ b/indra/newview/llpanelobjectinventory.cpp
@@ -1568,7 +1568,7 @@ void LLPanelObjectInventory::reset()
 	scroll_p.rect(scroller_rect);
 	scroll_p.tab_stop(true);
 	scroll_p.follows.flags(FOLLOWS_ALL);
-	mScroller = LLUICtrlFactory::create<LLScrollContainer>(scroll_p);
+	mScroller = LLUICtrlFactory::create<LLFolderViewScrollContainer>(scroll_p);
 	addChild(mScroller);
 	mScroller->addChild(mFolders);