From bb80d1877a8474ed60d4d0d41c587347fb521c95 Mon Sep 17 00:00:00 2001
From: Frank Reininghaus <frank78ac@googlemail.com>
Date: Wed, 10 Aug 2011 10:38:24 +0200
Subject: Update the anchor item when items are added or removed

If items are added or removed in the model, not only the
current item, but also the anchor item, which is the
starting point for any selections via Shift+Click or
Shift+Key, needs to be updated.
BUG: 262638
FIXED-IN: 4.8.0
---
 src/kitemviews/kitemlistselectionmanager.cpp | 30 ++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/kitemviews/kitemlistselectionmanager.cpp')

diff --git a/src/kitemviews/kitemlistselectionmanager.cpp b/src/kitemviews/kitemlistselectionmanager.cpp
index ee8ba929e..cdc6dbc7d 100644
--- a/src/kitemviews/kitemlistselectionmanager.cpp
+++ b/src/kitemviews/kitemlistselectionmanager.cpp
@@ -187,6 +187,20 @@ void KItemListSelectionManager::itemsInserted(const KItemRangeList& itemRanges)
         setCurrentItem(m_currentItem + inc);
     }
 
+    // Update the anchor item
+    if (m_anchorItem < 0) {
+        setAnchorItem(0);
+    } else {
+        int inc = 0;
+        foreach (const KItemRange& itemRange, itemRanges) {
+            if (m_anchorItem < itemRange.index) {
+                break;
+            }
+            inc += itemRange.count;
+        }
+        setAnchorItem(m_anchorItem + inc);
+    }
+
     // Update the selections
     if (!m_selectedItems.isEmpty()) {
         const QSet<int> previous = m_selectedItems;
@@ -231,6 +245,22 @@ void KItemListSelectionManager::itemsRemoved(const KItemRangeList& itemRanges)
         setCurrentItem(currentItem);
     }
 
+    // Update the anchor item
+    if (m_anchorItem >= 0) {
+        int anchorItem = m_anchorItem;
+        foreach (const KItemRange& itemRange, itemRanges) {
+            if (anchorItem < itemRange.index) {
+                break;
+            }
+            if (anchorItem >= itemRange.index + itemRange.count) {
+                anchorItem -= itemRange.count;
+            } else if (anchorItem >= m_model->count()) {
+                anchorItem = m_model->count() - 1;
+            }
+        }
+        setAnchorItem(anchorItem);
+    }
+
     // Update the selections
     if (!m_selectedItems.isEmpty()) {
         const QSet<int> previous = m_selectedItems;
-- 
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