EXT-7565 FIXED Would be nice to preserve selection while switching between folder/list view modes

- Created callback called 'SaveSelecton' (which preserves selection while switching between folder/list view modes) for folder/list view modes buttons in LLPanelOutfitEdit.

- Added 'scrollToShowFirstSelectedItem' method in the LLFlatListView which scrools and shows the first selected item in case multiselection.

- It's possible to set selection for flat list view items before list is build. The result is that any items will be selected. To get rid of it:
   1. Overrided LLFlatListView::selectItemByValue method in LLInventoryItemsList so that if list is not created yet, items ids are saved to the vector.
   2. Added 'LLInventoryItemsList::updateSelection()' method which selects items with ids from that vector when list is created.

- A little refactoring: moved funcionality of updating WearablesPanel's verb buttons to the separate method called LLPanelOutfitEdit::updateWearablesPanelVerbButtons() to made code more readable and self-explanatory

Reviewed by Vadim Savchuk and Neal Orman at https://codereview.productengine.com/secondlife/r/579/

--HG--
branch : product-engine

2 files changed, 13 insertions, 0 deletions

diff --git a/indra/llui/llflatlistview.cpp b/indra/llui/llflatlistview.cpp
index b87851490d..a3debdb19a 100644
--- a/indra/llui/llflatlistview.cpp
+++ b/indra/llui/llflatlistview.cpp
@@ -776,6 +776,18 @@ bool LLFlatListView::selectItemPair(item_pair_t* item_pair, bool select)
 	return true;
 }
 
+void LLFlatListView::scrollToShowFirstSelectedItem()
+{
+	if (!mSelectedItemPairs.size())	return;
+
+	LLRect selected_rc = mSelectedItemPairs.front()->first->getRect();
+
+	if (selected_rc.isValid())
+	{
+		scrollToShowRect(selected_rc);
+	}
+}
+
 LLRect LLFlatListView::getLastSelectedItemRect()
 {
 	if (!mSelectedItemPairs.size())
diff --git a/indra/llui/llflatlistview.h b/indra/llui/llflatlistview.h
index ded46d8122..bf72289c47 100644
--- a/indra/llui/llflatlistview.h
+++ b/indra/llui/llflatlistview.h
@@ -293,6 +293,7 @@ public:
 
 	bool updateValue(const LLSD& old_value, const LLSD& new_value);
 
+	void scrollToShowFirstSelectedItem();
 
 	void selectFirstItem	();
 	void selectLastItem		();