Make GridView/ListView attached "view" property available to all delegate types

This is useful for accessing the view (e.g. "width", "cellWidth", ... properties)
from within section (ListView only), header, footer and highlight delegate components.

A typical usecase are components that are used in multiple views and therefore
cannot use the views's id for access.

The only attached property valid for those non-item delegates is "view". This
has been added to the documentation.

Change-Id: I33d976da778be23ed531a3b193ceee95ed9800d2
Task-number: QTBUG-32836
Reviewed-by: Alan Alpert <aalpert@blackberry.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/quick/items/qquickitemview_p.h b/src/quick/items/qquickitemview_p.h
index ad026a3152..57635d7780 100644
--- a/src/quick/items/qquickitemview_p.h
+++ b/src/quick/items/qquickitemview_p.h
@@ -43,6 +43,7 @@
 #define QQUICKITEMVIEW_P_H
 
 #include "qquickflickable_p.h"
+#include <qpointer.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -282,6 +283,7 @@ class Q_AUTOTEST_EXPORT QQuickItemViewAttached : public QObject
 {
     Q_OBJECT
 
+    Q_PROPERTY(QQuickItemView *view READ view NOTIFY viewChanged)
     Q_PROPERTY(bool isCurrentItem READ isCurrentItem NOTIFY currentItemChanged)
     Q_PROPERTY(bool delayRemove READ delayRemove WRITE setDelayRemove NOTIFY delayRemoveChanged)
 
@@ -294,6 +296,14 @@ public:
         : QObject(parent), m_isCurrent(false), m_delayRemove(false) {}
     ~QQuickItemViewAttached() {}
 
+    QQuickItemView *view() { return m_view; }
+    void setView(QQuickItemView *view) {
+        if (view != m_view) {
+            m_view = view;
+            Q_EMIT viewChanged();
+        }
+    }
+
     bool isCurrentItem() const { return m_isCurrent; }
     void setIsCurrentItem(bool c) {
         if (m_isCurrent != c) {
@@ -353,6 +363,7 @@ public:
     void emitRemove() { Q_EMIT remove(); }
 
 Q_SIGNALS:
+    void viewChanged();
     void currentItemChanged();
     void delayRemoveChanged();
 
@@ -364,6 +375,7 @@ Q_SIGNALS:
     void nextSectionChanged();
 
 public:
+    QPointer<QQuickItemView> m_view;
     bool m_isCurrent : 1;
     bool m_delayRemove : 1;