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

diff --git a/src/kitemviews/kitemlistselectionmanager.cpp b/src/kitemviews/kitemlistselectionmanager.cpp
index ee8ba929eec30e3bd62b76924ece7e0b317f64ef..cdc6dbc7dc26f75f02146485bf71c6028775674f 100644 (file)
--- 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;

diff --git a/src/tests/kitemlistselectionmanagertest.cpp b/src/tests/kitemlistselectionmanagertest.cpp
index 3d0c318ffc9467ec59d20fecfe53746b8c63000a..6b0059a5c7a29d33caaa644f24834feb4f6410d6 100644 (file)
--- a/src/tests/kitemlistselectionmanagertest.cpp
+++ b/src/tests/kitemlistselectionmanagertest.cpp
@@ -121,6 +121,42 @@ void KItemListSelectionManagerTest::testCurrentItemAnchorItem()
     QCOMPARE(qvariant_cast<int>(spyAnchor.at(0).at(0)), 5);
     QCOMPARE(qvariant_cast<int>(spyAnchor.at(0).at(1)), 3);
     spyAnchor.takeFirst();
+
+    // Inserting items should update current item and anchor item.
+    m_selectionManager->itemsInserted(KItemRangeList() <<
+                                      KItemRange(0, 1) <<
+                                      KItemRange(2, 2) <<
+                                      KItemRange(6, 3));
+
+    QCOMPARE(m_selectionManager->currentItem(), 5);
+    QCOMPARE(spyCurrent.count(), 1);
+    QCOMPARE(qvariant_cast<int>(spyCurrent.at(0).at(0)), 5);
+    QCOMPARE(qvariant_cast<int>(spyCurrent.at(0).at(1)), 2);
+    spyCurrent.takeFirst();
+
+    QCOMPARE(m_selectionManager->anchorItem(), 8);
+    QCOMPARE(spyAnchor.count(), 1);
+    QCOMPARE(qvariant_cast<int>(spyAnchor.at(0).at(0)), 8);
+    QCOMPARE(qvariant_cast<int>(spyAnchor.at(0).at(1)), 5);
+    spyAnchor.takeFirst();
+
+    // Removing items should update current item and anchor item.
+    m_selectionManager->itemsRemoved(KItemRangeList() <<
+                                     KItemRange(0, 2) <<
+                                     KItemRange(2, 1) <<
+                                     KItemRange(9, 2));
+
+    QCOMPARE(m_selectionManager->currentItem(), 2);
+    QCOMPARE(spyCurrent.count(), 1);
+    QCOMPARE(qvariant_cast<int>(spyCurrent.at(0).at(0)), 2);
+    QCOMPARE(qvariant_cast<int>(spyCurrent.at(0).at(1)), 5);
+    spyCurrent.takeFirst();
+
+    QCOMPARE(m_selectionManager->anchorItem(), 5);
+    QCOMPARE(spyAnchor.count(), 1);
+    QCOMPARE(qvariant_cast<int>(spyAnchor.at(0).at(0)), 5);
+    QCOMPARE(qvariant_cast<int>(spyAnchor.at(0).at(1)), 8);
+    spyAnchor.takeFirst();
 }
 
 void KItemListSelectionManagerTest::testSetSelected_data()