QColumnView: didn't react to addition of rows/cols in the current view

Task-number: 246999

8 files changed, 61 insertions, 21 deletions

diff --git a/src/gui/itemviews/qabstractitemview_p.h b/src/gui/itemviews/qabstractitemview_p.h
index c2c1f32..026912a 100644
--- a/src/gui/itemviews/qabstractitemview_p.h
+++ b/src/gui/itemviews/qabstractitemview_p.h
@@ -109,12 +109,13 @@ public:
 
     void init();
 
-    void _q_rowsRemoved(const QModelIndex &parent, int start, int end);
-    void _q_columnsAboutToBeRemoved(const QModelIndex &parent, int start, int end);
-    void _q_columnsRemoved(const QModelIndex &parent, int start, int end);
-    void _q_columnsInserted(const QModelIndex &parent, int start, int end);
-    void _q_modelDestroyed();
-    void _q_layoutChanged();
+    virtual void _q_rowsRemoved(const QModelIndex &parent, int start, int end);
+    virtual void _q_columnsAboutToBeRemoved(const QModelIndex &parent, int start, int end);
+    virtual void _q_columnsRemoved(const QModelIndex &parent, int start, int end);
+    virtual void _q_columnsInserted(const QModelIndex &parent, int start, int end);
+    virtual void _q_modelDestroyed();
+    virtual void _q_layoutChanged();
+    
     void _q_fetchMore();
 
     bool shouldEdit(QAbstractItemView::EditTrigger trigger, const QModelIndex &index) const;
diff --git a/src/gui/itemviews/qcolumnview.cpp b/src/gui/itemviews/qcolumnview.cpp
index 1662fa8..ff20163 100644
--- a/src/gui/itemviews/qcolumnview.cpp
+++ b/src/gui/itemviews/qcolumnview.cpp
@@ -52,7 +52,6 @@
 #include <qscrollbar.h>
 #include <qpainter.h>
 #include <qdebug.h>
-#include <qpainterpath.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -896,6 +895,15 @@ QList<int> QColumnView::columnWidths() const
 /*!
     \reimp
 */
+void QColumnView::rowsInserted(const QModelIndex &parent, int start, int end)
+{
+    QAbstractItemView::rowsInserted(parent, start, end);
+    d_func()->checkColumnCreation(parent);
+}
+
+/*!
+    \reimp
+*/
 void QColumnView::currentChanged(const QModelIndex &current, const QModelIndex &previous)
 {
     Q_D(QColumnView);
@@ -1048,6 +1056,41 @@ QColumnViewPrivate::~QColumnViewPrivate()
 
 /*!
     \internal
+
+  */
+void QColumnViewPrivate::_q_columnsInserted(const QModelIndex &parent, int start, int end)
+{
+    QAbstractItemViewPrivate::_q_columnsInserted(parent, start, end);
+    checkColumnCreation(parent);
+}
+
+/*!
+    \internal
+
+    Makes sure we create a corresponding column as a result of changing the model.
+
+  */
+void QColumnViewPrivate::checkColumnCreation(const QModelIndex &parent)
+{
+    if (parent == q_func()->currentIndex() && model->hasChildren(parent)) {
+        //the parent has children and is the current
+        //let's try to find out if there is already a mapping that is good
+        for (int i = 0; i < columns.count(); ++i) {
+            QAbstractItemView *view = columns.at(i);
+            if (view->rootIndex() == parent) {
+                if (view == previewColumn) {
+                    //let's recreate the parent
+                    closeColumns(parent, false);
+                    createColumn(parent, true /*show*/);
+                }
+                break;
+            }
+        }
+    }
+}
+
+/*!
+    \internal
     Place all of the columns where they belong inside of the viewport, resize as necessary.
 */
 void QColumnViewPrivate::doLayout()
diff --git a/src/gui/itemviews/qcolumnview.h b/src/gui/itemviews/qcolumnview.h
index 880870a..f8697e9 100644
--- a/src/gui/itemviews/qcolumnview.h
+++ b/src/gui/itemviews/qcolumnview.h
@@ -97,16 +97,14 @@ protected:
     QRegion visualRegionForSelection(const QItemSelection &selection) const;
     int horizontalOffset() const;
     int verticalOffset() const;
-    void scrollContentsBy(int dx, int dy);
+    void rowsInserted(const QModelIndex &parent, int start, int end);
+    void currentChanged(const QModelIndex &current, const QModelIndex &previous);
 
     // QColumnView functions
+    void scrollContentsBy(int dx, int dy);
     virtual QAbstractItemView* createColumn(const QModelIndex &rootIndex);
     void initializeColumn(QAbstractItemView *column) const;
 
-protected Q_SLOTS:
-    // QAbstractItemView overloads
-    void currentChanged(const QModelIndex &current, const QModelIndex &previous);
-
 private:
     Q_DECLARE_PRIVATE(QColumnView)
     Q_DISABLE_COPY(QColumnView)
diff --git a/src/gui/itemviews/qcolumnview_p.h b/src/gui/itemviews/qcolumnview_p.h
index 92a4d2a..233dc3c 100644
--- a/src/gui/itemviews/qcolumnview_p.h
+++ b/src/gui/itemviews/qcolumnview_p.h
@@ -148,10 +148,13 @@ public:
     void closeColumns(const QModelIndex &parent = QModelIndex(), bool build = false);
     void doLayout();
     void setPreviewWidget(QWidget *widget);
+    void checkColumnCreation(const QModelIndex &parent);
+
 
     void _q_gripMoved(int offset);
     void _q_changeCurrentColumn();
     void _q_clicked(const QModelIndex &index);
+    void _q_columnsInserted(const QModelIndex &parent, int start, int end);
 
     QList<QAbstractItemView*> columns;
     QVector<int> columnSizes; // used during init and corner moving
diff --git a/src/gui/itemviews/qheaderview.h b/src/gui/itemviews/qheaderview.h
index bf92667..3a66c9a 100644
--- a/src/gui/itemviews/qheaderview.h
+++ b/src/gui/itemviews/qheaderview.h
@@ -228,7 +228,6 @@ protected:
 private:
     Q_PRIVATE_SLOT(d_func(), void _q_sectionsRemoved(const QModelIndex &parent, int logicalFirst, int logicalLast))
     Q_PRIVATE_SLOT(d_func(), void _q_layoutAboutToBeChanged())
-    Q_PRIVATE_SLOT(d_func(), void _q_layoutChanged())
     Q_DECLARE_PRIVATE(QHeaderView)
     Q_DISABLE_COPY(QHeaderView)
 };
diff --git a/src/gui/itemviews/qtreeview.h b/src/gui/itemviews/qtreeview.h
index 35a205c..0347645 100644
--- a/src/gui/itemviews/qtreeview.h
+++ b/src/gui/itemviews/qtreeview.h
@@ -144,19 +144,20 @@ public:
 
     void sortByColumn(int column, Qt::SortOrder order);
 
+    void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
+    void selectAll();
+
 Q_SIGNALS:
     void expanded(const QModelIndex &index);
     void collapsed(const QModelIndex &index);
 
 public Q_SLOTS:
-    void dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight);
     void hideColumn(int column);
     void showColumn(int column);
     void expand(const QModelIndex &index);
     void collapse(const QModelIndex &index);
     void resizeColumnToContents(int column);
     void sortByColumn(int column);
-    void selectAll();
     void expandAll();
     void collapseAll();
     void expandToDepth(int depth);
@@ -225,8 +226,6 @@ private:
     Q_PRIVATE_SLOT(d_func(), void _q_endAnimatedOperation())
     Q_PRIVATE_SLOT(d_func(), void _q_animate())
     Q_PRIVATE_SLOT(d_func(), void _q_currentChanged(const QModelIndex&, const QModelIndex &))
-    Q_PRIVATE_SLOT(d_func(), void _q_columnsAboutToBeRemoved(const QModelIndex &, int, int))
-    Q_PRIVATE_SLOT(d_func(), void _q_columnsRemoved(const QModelIndex &, int, int))
     Q_PRIVATE_SLOT(d_func(), void _q_modelAboutToBeReset())
     Q_PRIVATE_SLOT(d_func(), void _q_sortIndicatorChanged(int column, Qt::SortOrder order))
     Q_PRIVATE_SLOT(d_func(), void _q_modelDestroyed())
diff --git a/src/gui/widgets/qabstractscrollarea.cpp b/src/gui/widgets/qabstractscrollarea.cpp
index 66572b8..d952ab0 100644
--- a/src/gui/widgets/qabstractscrollarea.cpp
+++ b/src/gui/widgets/qabstractscrollarea.cpp
@@ -490,9 +490,6 @@ void QAbstractScrollAreaPrivate::layoutChildren()
     viewport->setGeometry(QStyle::visualRect(opt.direction, opt.rect, viewportRect)); // resize the viewport last
 }
 
-// ### Fix for 4.4, talk to Bjoern E or Girish.
-void QAbstractScrollAreaPrivate::scrollBarPolicyChanged(Qt::Orientation, Qt::ScrollBarPolicy) {}
-
 /*!
     \internal
 
diff --git a/src/gui/widgets/qabstractscrollarea_p.h b/src/gui/widgets/qabstractscrollarea_p.h
index 5d3494b..7e0f444 100644
--- a/src/gui/widgets/qabstractscrollarea_p.h
+++ b/src/gui/widgets/qabstractscrollarea_p.h
@@ -88,7 +88,7 @@ public:
     void init();
     void layoutChildren();
     // ### Fix for 4.4, talk to Bjoern E or Girish.
-    virtual void scrollBarPolicyChanged(Qt::Orientation, Qt::ScrollBarPolicy);
+    virtual void scrollBarPolicyChanged(Qt::Orientation, Qt::ScrollBarPolicy) {}
 
     void _q_hslide(int);
     void _q_vslide(int);