Add ListView.nextSection attached property

and also renamed ListView.prevSection to ListView.previousSection

Task-number: QTBUG-11372

3 files changed, 43 insertions, 5 deletions

diff --git a/src/declarative/QmlChanges.txt b/src/declarative/QmlChanges.txt
index 432b5d6..336fbbf 100644
--- a/src/declarative/QmlChanges.txt
+++ b/src/declarative/QmlChanges.txt
@@ -14,6 +14,8 @@ Component:
     - isReady, isLoading, isError and isNull properties removed, use
       status property instead
     - errorsString() renamed to errorString()
+ListView:
+    - ListView.prevSection property changed to ListView.previousSection
 
 TextInput xToPosition -> positionAt (to match TextEdit.positionAt)
 
diff --git a/src/declarative/graphicsitems/qdeclarativelistview.cpp b/src/declarative/graphicsitems/qdeclarativelistview.cpp
index a69fc3f..4be8705 100644
--- a/src/declarative/graphicsitems/qdeclarativelistview.cpp
+++ b/src/declarative/graphicsitems/qdeclarativelistview.cpp
@@ -575,6 +575,10 @@ FxListItem *QDeclarativeListViewPrivate::createItem(int modelIndex)
                     listItem->attached->m_prevSection = item->attached->section();
                 else
                     listItem->attached->m_prevSection = sectionAt(modelIndex-1);
+                if (FxListItem *item = visibleItem(modelIndex+1))
+                    listItem->attached->m_nextSection = item->attached->section();
+                else
+                    listItem->attached->m_nextSection = sectionAt(modelIndex+1);
             }
         }
         if (model->completePending()) {
@@ -951,14 +955,26 @@ void QDeclarativeListViewPrivate::updateSections()
         QString prevSection;
         if (visibleIndex > 0)
             prevSection = sectionAt(visibleIndex-1);
+        QDeclarativeListViewAttached *prevAtt = 0;
+        int idx = -1;
         for (int i = 0; i < visibleItems.count(); ++i) {
             if (visibleItems.at(i)->index != -1) {
                 QDeclarativeListViewAttached *attached = visibleItems.at(i)->attached;
                 attached->setPrevSection(prevSection);
+                if (prevAtt)
+                    prevAtt->setNextSection(attached->section());
                 createSection(visibleItems.at(i));
                 prevSection = attached->section();
+                prevAtt = attached;
+                idx = visibleItems.at(i)->index;
             }
         }
+        if (prevAtt) {
+            if (idx > 0 && idx < model->count()-1)
+                prevAtt->setNextSection(sectionAt(idx+1));
+            else
+                prevAtt->setNextSection(QString());
+        }
     }
 }
 
@@ -1418,7 +1434,7 @@ QDeclarativeListView::~QDeclarativeListView()
 */
 
 /*!
-    \qmlattachedproperty string ListView::prevSection
+    \qmlattachedproperty string ListView::previousSection
     This attached property holds the section of the previous element.
 
     It is attached to each instance of the delegate.
@@ -1427,6 +1443,15 @@ QDeclarativeListView::~QDeclarativeListView()
 */
 
 /*!
+    \qmlattachedproperty string ListView::nextSection
+    This attached property holds the section of the next element.
+
+    It is attached to each instance of the delegate.
+
+    The section is evaluated using the \l {ListView::section.property}{section} properties.
+*/
+
+/*!
     \qmlattachedproperty string ListView::section
     This attached property holds the section of this element.
 
@@ -1963,9 +1988,9 @@ void QDeclarativeListView::setCacheBuffer(int b)
 
     \c section.delegate holds the delegate component for each section.
 
-    Each item in the list has attached properties named \c ListView.section and
-    \c ListView.prevSection.  These may be used to place a section header for
-    related items.  
+    Each item in the list has attached properties named \c ListView.section,
+    \c ListView.previousSection and \c ListView.nextSection.  These may be
+    used to place a section header for related items.
 
     For example, here is a ListView that displays a list of animals, separated 
     into sections. Each item in the ListView is placed in a different section 
diff --git a/src/declarative/graphicsitems/qdeclarativelistview_p.h b/src/declarative/graphicsitems/qdeclarativelistview_p.h
index 505f659..f55db9b 100644
--- a/src/declarative/graphicsitems/qdeclarativelistview_p.h
+++ b/src/declarative/graphicsitems/qdeclarativelistview_p.h
@@ -279,7 +279,7 @@ public:
         }
     }
 
-    Q_PROPERTY(QString prevSection READ prevSection NOTIFY prevSectionChanged)
+    Q_PROPERTY(QString previousSection READ prevSection NOTIFY prevSectionChanged)
     QString prevSection() const { return m_prevSection; }
     void setPrevSection(const QString &sect) {
         if (m_prevSection != sect) {
@@ -288,6 +288,15 @@ public:
         }
     }
 
+    Q_PROPERTY(QString nextSection READ nextSection NOTIFY nextSectionChanged)
+    QString nextSection() const { return m_nextSection; }
+    void setNextSection(const QString &sect) {
+        if (m_nextSection != sect) {
+            m_nextSection = sect;
+            emit nextSectionChanged();
+        }
+    }
+
     Q_PROPERTY(QString section READ section NOTIFY sectionChanged)
     QString section() const { return m_section; }
     void setSection(const QString &sect) {
@@ -313,6 +322,7 @@ Q_SIGNALS:
     void currentItemChanged();
     void sectionChanged();
     void prevSectionChanged();
+    void nextSectionChanged();
     void delayRemoveChanged();
     void add();
     void remove();
@@ -321,6 +331,7 @@ public:
     QDeclarativeListView *m_view;
     mutable QString m_section;
     QString m_prevSection;
+    QString m_nextSection;
     bool m_isCurrent : 1;
     bool m_delayRemove : 1;
 };