Calculate all item size hints at once.

The speed up is really small, but theses changes are mostly straightforward and make the code a bit nicer - break
the KStandardItemListWidgetInformant::itemSizeHint beast into three smaller functions.

FIXED-IN: 4.13
REVIEW: 112979

1 files changed, 5 insertions, 1 deletions

diff --git a/src/kitemviews/kstandarditemlistwidget.h b/src/kitemviews/kstandarditemlistwidget.h
index 7dd93b2b8..ca198c36b 100644
--- a/src/kitemviews/kstandarditemlistwidget.h
+++ b/src/kitemviews/kstandarditemlistwidget.h
@@ -38,7 +38,7 @@ public:
     KStandardItemListWidgetInformant();
     virtual ~KStandardItemListWidgetInformant();
 
-    virtual QSizeF itemSizeHint(int index, const KItemListView* view) const;
+    virtual void calculateItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const;
 
     virtual qreal preferredRoleColumnWidth(const QByteArray& role,
                                            int index,
@@ -61,6 +61,10 @@ protected:
     virtual QString roleText(const QByteArray& role,
                              const QHash<QByteArray, QVariant>& values) const;
 
+    void calculateIconsLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const;
+    void calculateCompactLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const;
+    void calculateDetailsLayoutItemSizeHints(QVector<QSizeF>& sizeHints, const KItemListView* view) const;
+
     friend class KStandardItemListWidget; // Accesses roleText()
 };