add support for adding two qgw on the sides of the tabbar

svn path=/trunk/KDE/kdelibs/; revision=1148951

widgets/tabbar.cpp

@@ -109,6 +109,8 @@ public:
     Animation *newPageAnim;
     QParallelAnimationGroup *animGroup;
     bool customFont;
+    QWeakPointer<QGraphicsWidget> firstPositionWidget;
+    QWeakPointer<QGraphicsWidget> lastPositionWidget;
 };
 
 void TabBarPrivate::updateTabWidgetMode()
@@ -610,6 +612,65 @@ void TabBar::changeEvent(QEvent *event)
     QGraphicsWidget::changeEvent(event);
 }
 
+void TabBar::setFirstPositionWidget(QGraphicsWidget *widget)
+{
+    if (d->lastPositionWidget.data() == widget) {
+        return;
+    }
+
+    if (d->firstPositionWidget) {
+        QGraphicsWidget *widget = d->firstPositionWidget.data();
+        d->tabBarLayout->removeItem(widget);
+        scene()->removeItem(widget);
+        widget->deleteLater();
+    }
+
+    d->firstPositionWidget = widget;
+    if (widget) {
+        widget->setParentItem(this);
+        if (layoutDirection() == Qt::LeftToRight) {
+            d->tabBarLayout->insertItem(0, widget);
+        } else {
+            d->tabBarLayout->addItem(widget);
+        }
+    }
+}
+
+
+QGraphicsWidget *TabBar::firstPositionWidget() const
+{
+    return d->firstPositionWidget.data();
+}
+
+void TabBar::setLastPositionWidget(QGraphicsWidget *widget)
+{
+    if (d->lastPositionWidget.data() == widget) {
+        return;
+    }
+
+    if (d->lastPositionWidget) {
+        QGraphicsWidget *widget = d->lastPositionWidget.data();
+        d->tabBarLayout->removeItem(widget);
+        scene()->removeItem(widget);
+        widget->deleteLater();
+    }
+
+    d->lastPositionWidget = widget;
+    if (widget) {
+        widget->setParentItem(this);
+        if (layoutDirection() == Qt::LeftToRight) {
+            d->tabBarLayout->addItem(widget);
+        } else {
+            d->tabBarLayout->insertItem(0, widget);
+        }
+    }
+}
+
+QGraphicsWidget *TabBar::lastPositionWidget() const
+{
+    return d->lastPositionWidget.data();
+}
+
 } // namespace Plasma
 
 #include <tabbar.moc>

widgets/tabbar.h

@@ -52,6 +52,8 @@ class PLASMA_EXPORT TabBar : public QGraphicsWidget
     Q_PROPERTY(int count READ count)
     Q_PROPERTY(QString styleSheet READ styleSheet WRITE setStyleSheet)
     Q_PROPERTY(bool tabBarShown READ isTabBarShown WRITE setTabBarShown)
+    Q_PROPERTY(QGraphicsWidget *firstPositionWidget READ firstPositionWidget WRITE setFirstPositionWidget)
+    Q_PROPERTY(QGraphicsWidget *lastPositionWidget READ lastPositionWidget WRITE setLastPositionWidget)
 
 public:
     /**
@@ -207,6 +209,36 @@ public:
      */
     KTabBar *nativeWidget() const;
 
+    /**
+     * Set a widget to be displayed on one side of the TabBar, depending on the
+     * LayoutDirection and the Shape.
+     * @param widget the widget to be displayed. Passing 0 will show nothing.
+     * Any previous widget will be deleted.
+     * @since 4.6
+     */
+    void setFirstPositionWidget(QGraphicsWidget *widget);
+
+    /**
+     * @return the widget in the first position
+     * @since 4.6
+     */
+    QGraphicsWidget *firstPositionWidget() const;
+
+    /**
+     * Set a widget to be displayed on one side of the TabBar, depending on the
+     * LayoutDirection and the Shape.
+     * @param widget the widget to be displayed. Passing 0 will show nothing.
+     * Any previous widget will be deleted.
+     * @since 4.6
+     */
+    void setLastPositionWidget(QGraphicsWidget *widget);
+
+    /**
+     * @return the widget in the last position
+     * @since 4.6
+     */
+    QGraphicsWidget *lastPositionWidget() const;
+
 public Q_SLOTS:
     /**
      * Activate a given tab