Fix out of bounds use of QVector API.

This is a regression introduced by commit
d63910575949106f84dacf04abaa14fc866aa66b.

Task-number: QTBUG-24965
Task-number: QTBUG-25140
Change-Id: Ice9d90ebb81dcc3c0bc166eeb8f77a0ad9d99476
Reviewed-by: David Faure <faure@kde.org>

2 files changed, 7 insertions, 6 deletions

diff --git a/src/gui/itemviews/qtreeview.cpp b/src/gui/itemviews/qtreeview.cpp
index 813787f..4006601 100644
--- a/src/gui/itemviews/qtreeview.cpp
+++ b/src/gui/itemviews/qtreeview.cpp
@@ -1390,7 +1390,10 @@ void QTreeViewPrivate::adjustViewOptionsForIndex(QStyleOptionViewItemV4 *option,
 
     QVector<int> logicalIndices; // index = visual index of visible columns only. data = logical index.
     QVector<QStyleOptionViewItemV4::ViewItemPosition> viewItemPosList; // vector of left/middle/end for each logicalIndex, visible columns only.
-    calcLogicalIndices(&logicalIndices, &viewItemPosList);
+    const bool spanning = viewItems.at(row).spanning;
+    const int left = (spanning ? header->visualIndex(0) : 0);
+    const int right = (spanning ? header->visualIndex(0) : header->count() - 1 );
+    calcLogicalIndices(&logicalIndices, &viewItemPosList, left, right);
 
     int columnIndex = 0;
     for (int visualIndex = 0; visualIndex < current.column(); ++visualIndex) {
@@ -1488,10 +1491,8 @@ static inline bool ancestorOf(QObject *widget, QObject *other)
     return false;
 }
 
-void QTreeViewPrivate::calcLogicalIndices(QVector<int> *logicalIndices, QVector<QStyleOptionViewItemV4::ViewItemPosition> *itemPositions) const
+void QTreeViewPrivate::calcLogicalIndices(QVector<int> *logicalIndices, QVector<QStyleOptionViewItemV4::ViewItemPosition> *itemPositions, int left, int right) const
 {
-    const int left = (spanning ? header->visualIndex(0) : leftAndRight.first);
-    const int right = (spanning ? header->visualIndex(0) : leftAndRight.second);
     const int columnCount = header->count();
     /* 'left' and 'right' are the left-most and right-most visible visual indices.
        Compute the first visible logical indices before and after the left and right.
@@ -1615,7 +1616,7 @@ void QTreeView::drawRow(QPainter *painter, const QStyleOptionViewItem &option,
 
     QVector<int> logicalIndices;
     QVector<QStyleOptionViewItemV4::ViewItemPosition> viewItemPosList; // vector of left/middle/end for each logicalIndex
-    d->calcLogicalIndices(&logicalIndices, &viewItemPosList);
+    d->calcLogicalIndices(&logicalIndices, &viewItemPosList, left, right);
 
     for (int currentLogicalSection = 0; currentLogicalSection < logicalIndices.count(); ++currentLogicalSection) {
         int headerSection = logicalIndices.at(currentLogicalSection);
diff --git a/src/gui/itemviews/qtreeview_p.h b/src/gui/itemviews/qtreeview_p.h
index 1124b6c..a9b3fc9 100644
--- a/src/gui/itemviews/qtreeview_p.h
+++ b/src/gui/itemviews/qtreeview_p.h
@@ -170,7 +170,7 @@ public:
 
     // logicalIndices: vector of currently visibly logical indices
     // itemPositions: vector of view item positions (beginning/middle/end/onlyone)
-    void calcLogicalIndices(QVector<int> *logicalIndices, QVector<QStyleOptionViewItemV4::ViewItemPosition> *itemPositions) const;
+    void calcLogicalIndices(QVector<int> *logicalIndices, QVector<QStyleOptionViewItemV4::ViewItemPosition> *itemPositions, int left, int right) const;
 
     QHeaderView *header;
     int indent;