Move the viewOptions code back to public implementation

The code generating the QStyleOptionViewItem has been moved back to the
public implementation and the private QAbstractItemView::viewOptions
calling it (like the Qt 4 implementation does). This makes the item
views behave properly again e.g. QListView drag & drop in Icon mode
gets the correct options to draw the moving items

Task-number: QTBUG-1180

Change-Id: I068861e1485252f12d73f9acaf12933d0ec84e2c
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

src/widgets/itemviews/qabstractitemview.cpp

@@ -3600,45 +3600,45 @@ void QAbstractItemView::startDrag(Qt::DropActions supportedActions)
 QStyleOptionViewItem QAbstractItemView::viewOptions() const
 {
     Q_D(const QAbstractItemView);
-    return d->viewOptions();
-}
-
-QStyleOptionViewItem QAbstractItemViewPrivate::viewOptions() const
-{
-    Q_Q(const QAbstractItemView);
     QStyleOptionViewItem option;
-    option.init(q);
+    option.init(this);
     option.state &= ~QStyle::State_MouseOver;
-    option.font = q->font();
+    option.font = font();
 
 #ifndef Q_WS_MAC
     // On mac the focus appearance follows window activation
     // not widget activation
-    if (!q->hasFocus())
+    if (!hasFocus())
         option.state &= ~QStyle::State_Active;
 #endif
 
     option.state &= ~QStyle::State_HasFocus;
-    if (iconSize.isValid()) {
-        option.decorationSize = iconSize;
+    if (d->iconSize.isValid()) {
+        option.decorationSize = d->iconSize;
     } else {
-        int pm = q->style()->pixelMetric(QStyle::PM_SmallIconSize, 0, q);
+        int pm = style()->pixelMetric(QStyle::PM_SmallIconSize, 0, this);
         option.decorationSize = QSize(pm, pm);
     }
     option.decorationPosition = QStyleOptionViewItem::Left;
     option.decorationAlignment = Qt::AlignCenter;
     option.displayAlignment = Qt::AlignLeft|Qt::AlignVCenter;
-    option.textElideMode = textElideMode;
+    option.textElideMode = d->textElideMode;
     option.rect = QRect();
-    option.showDecorationSelected = q->style()->styleHint(QStyle::SH_ItemView_ShowDecorationSelected, 0, q);
-    if (wrapItemText)
+    option.showDecorationSelected = style()->styleHint(QStyle::SH_ItemView_ShowDecorationSelected, 0, this);
+    if (d->wrapItemText)
         option.features = QStyleOptionViewItem::WrapText;
-    option.locale = q->locale();
+    option.locale = locale();
     option.locale.setNumberOptions(QLocale::OmitGroupSeparator);
-    option.widget = q;
+    option.widget = this;
     return option;
 }
 
+QStyleOptionViewItem QAbstractItemViewPrivate::viewOptions() const
+{
+    Q_Q(const QAbstractItemView);
+    return q->viewOptions();
+}
+
 /*!
     Returns the item view's state.
 

src/widgets/itemviews/qlistview.cpp

@@ -901,20 +901,14 @@ void QListView::startDrag(Qt::DropActions supportedActions)
 QStyleOptionViewItem QListView::viewOptions() const
 {
     Q_D(const QListView);
-    return d->viewOptions();
-}
-
-QStyleOptionViewItem QListViewPrivate::viewOptions() const
-{
-    Q_Q(const QListView);
-    QStyleOptionViewItem option = QAbstractItemViewPrivate::viewOptions();
-    if (!iconSize.isValid()) { // otherwise it was already set in abstractitemview
-        int pm = (viewMode == QListView::ListMode
-                  ? q->style()->pixelMetric(QStyle::PM_ListViewIconSize, 0, q)
-                  : q->style()->pixelMetric(QStyle::PM_IconViewIconSize, 0, q));
+    QStyleOptionViewItem option = QAbstractItemView::viewOptions();
+    if (!d->iconSize.isValid()) { // otherwise it was already set in abstractitemview
+        int pm = (d->viewMode == QListView::ListMode
+                  ? style()->pixelMetric(QStyle::PM_ListViewIconSize, 0, this)
+                  : style()->pixelMetric(QStyle::PM_IconViewIconSize, 0, this));
         option.decorationSize = QSize(pm, pm);
     }
-    if (viewMode == QListView::IconMode) {
+    if (d->viewMode == QListView::IconMode) {
         option.showDecorationSelected = false;
         option.decorationPosition = QStyleOptionViewItem::Top;
         option.displayAlignment = Qt::AlignCenter;

src/widgets/itemviews/qlistview_p.h

@@ -391,8 +391,6 @@ public:
         }
     }
 
-    QStyleOptionViewItem viewOptions() const;
-
     void scrollElasticBandBy(int dx, int dy);
 
     QItemViewPaintPairs draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const;

src/widgets/itemviews/qtableview.cpp

@@ -1346,20 +1346,14 @@ void QTableView::scrollContentsBy(int dx, int dy)
     }
 }
 
-QStyleOptionViewItem QTableViewPrivate::viewOptions() const
-{
-    QStyleOptionViewItem option = QAbstractItemViewPrivate::viewOptions();
-    option.showDecorationSelected = true;
-    return option;
-}
-
 /*!
   \reimp
 */
 QStyleOptionViewItem QTableView::viewOptions() const
 {
-    Q_D(const QTableView);
-    return d->viewOptions();
+    QStyleOptionViewItem option = QAbstractItemView::viewOptions();
+    option.showDecorationSelected = true;
+    return option;
 }
 
 /*!

src/widgets/itemviews/qtableview_p.h

@@ -150,8 +150,6 @@ public:
     void init();
     void trimHiddenSelections(QItemSelectionRange *range) const;
 
-    QStyleOptionViewItem viewOptions() const;
-
     inline bool isHidden(int row, int col) const {
         return verticalHeader->isSectionHidden(row)
             || horizontalHeader->isSectionHidden(col);