Improved Extender support in popupApplet. Dialog resizes correctly, and even the last

item is removable. Implementation is still not perfect, but it's now a lot better then it 
was.


svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=853962

corona.cpp

@@ -350,7 +350,6 @@ Containment* Corona::addContainmentDelayed(const QString& name, const QVariantLi
 
 void Corona::addOffscreenWidget(QGraphicsWidget *widget)
 {
-    kDebug() << "adding offscreen widget.";
     widget->setParentItem(0);
     if (!d->offscreenLayout) {
         kDebug() << "adding offscreen widget.";
@@ -362,6 +361,16 @@ void Corona::addOffscreenWidget(QGraphicsWidget *widget)
         offscreenWidget->setLayout(d->offscreenLayout);
     }
 
+    //check if the layout allready contains this widget.
+    //XXX: duplicated from removeOffscreenWidget()
+    for (int i = 0; i < d->offscreenLayout->count(); i++) {
+        QGraphicsWidget *foundWidget =
+            dynamic_cast<QGraphicsWidget*>(d->offscreenLayout->itemAt(i));
+        if (foundWidget == widget) {
+            return;
+        }
+    }
+
     d->offscreenLayout->addItem(widget, d->offscreenLayout->rowCount() + 1,
                                         d->offscreenLayout->columnCount() + 1);
 
@@ -381,6 +390,7 @@ void Corona::removeOffscreenWidget(QGraphicsWidget *widget)
             dynamic_cast<QGraphicsWidget*>(d->offscreenLayout->itemAt(i));
         if (foundWidget == widget) {
             d->offscreenLayout->removeAt(i);
+            d->offscreenLayout->invalidate();
         }
     }
 }

dialog.cpp

@@ -66,7 +66,6 @@ public:
     void themeUpdated();
     void adjustView();
 
-
     Plasma::Dialog *q;
     /**
      * Holds the background SVG, to be re-rendered when the cache is invalidated,
@@ -89,9 +88,26 @@ void DialogPrivate::themeUpdated()
 void DialogPrivate::adjustView()
 {
     if (view && widget) {
+        QSize prevSize = q->size();
+
+        //reposition and resize the view.
         view->setSceneRect(widget->mapToScene(widget->boundingRect()).boundingRect());
-        view->resize(widget->minimumSize().toSize());
+        view->resize(widget->preferredSize().toSize());
         view->centerOn(widget);
+
+        //set the sizehints correctly:
+        int left, top, right, bottom;
+        q->getContentsMargins(&left, &top, &right, &bottom);
+        q->setMinimumSize(view->size().width() + left + right,
+                          view->size().height() + top + bottom);
+        q->setMaximumSize(view->size().width() + left + right,
+                          view->size().height() + top + bottom);
+        q->updateGeometry();
+
+        if (q->size() != prevSize) {
+            //the size of the dialog has changed, emit the signal:
+            emit q->dialogResized();
+        }
     }
 }
 
@@ -171,12 +187,6 @@ QGraphicsWidget *Dialog::graphicsWidget()
     return d->widget;
 }
 
-void Dialog::adjustView()
-{
-    d->adjustView();
-    adjustSize();
-}
-
 bool Dialog::eventFilter(QObject *watched, QEvent *event)
 {
     if (watched == d->widget && (event->type() == QEvent::GraphicsSceneResize ||

dialog.h

@@ -61,12 +61,11 @@ class PLASMA_EXPORT Dialog : public QWidget
         void setGraphicsWidget(QGraphicsWidget *widget);
         QGraphicsWidget *graphicsWidget();
 
-    public Q_SLOTS:
+    Q_SIGNALS:
         /**
-         * Call when the size of the graphicsWidget changes, to adjust the view and resize the
+         * Fires when the dialog automatically resizes.
-         * dialog.
          */
-        void adjustView();
+        void dialogResized();
 
     protected:
         /**
@@ -78,6 +77,8 @@ class PLASMA_EXPORT Dialog : public QWidget
 
     private:
         DialogPrivate * const d;
+
+        friend class DialogPrivate;
         /**
          * React to theme changes 
          */

extender.cpp

@@ -162,8 +162,7 @@ void Extender::itemAddedEvent(ExtenderItem *item, const QPointF &pos)
     //remove the empty extender message if needed.
     if (d->emptyExtenderLabel) {
         d->layout->removeItem(d->emptyExtenderLabel);
-        delete d->emptyExtenderLabel;
+        d->emptyExtenderLabel->hide();
-        d->emptyExtenderLabel = 0;
     }
 
     d->adjustSizeHints();
@@ -176,9 +175,10 @@ void Extender::itemRemovedEvent(ExtenderItem *item)
     d->layout->removeItem(item);
 
     //add the empty extender message if needed.
-    if (!attachedItems().count() && !d->emptyExtenderLabel) {
+    if (!attachedItems().count()) {
-        d->emptyExtenderLabel = new Label(this);
+        d->emptyExtenderLabel->show();
-        d->emptyExtenderLabel->setText(d->emptyExtenderMessage);
+        //just in case:
+        d->layout->removeItem(d->emptyExtenderLabel);
         d->layout->addItem(d->emptyExtenderLabel);
     }
 
@@ -187,7 +187,7 @@ void Extender::itemRemovedEvent(ExtenderItem *item)
 
 void Extender::itemHoverEnterEvent(ExtenderItem *item)
 {
-    Q_UNUSED(item);
+    itemHoverMoveEvent(item, QPointF(0, 0));
 }
 
 void Extender::itemHoverMoveEvent(ExtenderItem *item, const QPointF &pos)
@@ -215,8 +215,7 @@ void Extender::itemHoverMoveEvent(ExtenderItem *item, const QPointF &pos)
     //XXX: duplicated from itemAttachedEvent.
     if (d->emptyExtenderLabel) {
         d->layout->removeItem(d->emptyExtenderLabel);
-        delete d->emptyExtenderLabel;
+        d->emptyExtenderLabel->hide();
-        d->emptyExtenderLabel = 0;
     }
 
     d->adjustSizeHints();
@@ -235,9 +234,9 @@ void Extender::itemHoverLeaveEvent(ExtenderItem *item)
         d->currentSpacerIndex = -1;
 
         //Make sure we add a 'no detachables' label when the layout is empty.
-        if (!attachedItems().count() && !d->emptyExtenderLabel) {
+        if (!attachedItems().count()) {
-            d->emptyExtenderLabel = new Label(this);
+            d->emptyExtenderLabel->show();
-            d->emptyExtenderLabel->setText(d->emptyExtenderMessage);
+            d->layout->removeItem(d->emptyExtenderLabel);
             d->layout->addItem(d->emptyExtenderLabel);
         }
 

extenderitem.cpp

@@ -128,7 +128,6 @@ class ExtenderItemPrivate
 
         void updateToolBox() {
             if (toolbox && dragger && toolboxLayout) {
-                kDebug() << "updating toolbox";
                 //clean the layout.
                 uint iconHeight = dragger->elementSize("hint-preferred-icon-size").height();
 
@@ -651,11 +650,9 @@ void ExtenderItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
     parentApplet->raise();
     setZValue(parentApplet->zValue());
 
-    d->extender->d->removeExtenderItem(this);
-
     if (d->extender) {
         d->extender->itemHoverEnterEvent(this);
-        d->extender->itemHoverMoveEvent(this, d->extender->mapFromScene(event->scenePos()));
+        //d->extender->itemHoverMoveEvent(this, d->extender->mapFromScene(event->scenePos()));
     }
 
     //call the move event, since that spawns a toplevel view when this extender item is in a
@@ -663,13 +660,13 @@ void ExtenderItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
     //able to receive any move events.
     mouseMoveEvent(event);
 
+    d->extender->d->removeExtenderItem(this);
+
     QApplication::setOverrideCursor(Qt::ClosedHandCursor);
 }
 
 void ExtenderItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 {
-    Q_UNUSED(event);
-
     if (!d->mousePressed) {
         return;
     }
@@ -684,6 +681,8 @@ void ExtenderItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
     screenRect.setTopLeft(event->screenPos() - d->mousePos);
     screenRect.setSize(d->screenRect().size());
 
+    Corona *corona = d->hostApplet()->containment()->corona();
+
     if (d->leaveCurrentView(screenRect)) {
         //we're moving the applet to a toplevel view, so place it somewhere out of sight
         //first: in the topleft quadrant.
@@ -691,14 +690,9 @@ void ExtenderItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
         if (!d->toplevel) {
             //XXX duplication from applethandle
             //create a toplevel view and aim it at the applet.
-            Corona *corona = d->hostApplet()->containment()->corona();
             d->toplevel = new QGraphicsView(corona, 0);
-            //TODO: use addOffscreenWidget
+
-            if (sceneBoundingRect().left() > 0) {
+            corona->addOffscreenWidget(this);
-                setParentItem(0);
-                //only move to topleft quadrant if it isn't there allready.
-                setPos(-12000, -12000);
-            }
 
             d->toplevel->setWindowFlags(Qt::ToolTip | Qt::FramelessWindowHint
                                                     | Qt::WindowStaysOnTopHint);
@@ -721,6 +715,7 @@ void ExtenderItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
         d->toplevel->setSceneRect(sceneBoundingRect());
         d->toplevel->setGeometry(screenRect);
     } else {
+        corona->removeOffscreenWidget(this);
         setParentItem(d->hostApplet());
         setPos(d->deltaScene);
 
@@ -739,7 +734,6 @@ void ExtenderItem::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 
     //find the extender we're hovering over.
     Extender *targetExtender = 0;
-    Corona *corona = qobject_cast<Corona*>(scene());
     foreach (Containment *containment, corona->containments()) {
         foreach (Applet *applet, containment->applets()) {
             if (applet->extender() && (applet->sceneBoundingRect().contains(mousePos)
@@ -813,6 +807,9 @@ void ExtenderItem::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
         //find the extender we're hovering over.
         Extender *targetExtender = 0;
         Corona *corona = qobject_cast<Corona*>(scene());
+
+        corona->removeOffscreenWidget(this);
+
         foreach (Containment *containment, corona->containments()) {
             foreach (Applet *applet, containment->applets()) {
                 if (applet->extender() && (applet->sceneBoundingRect().contains(mousePos)

popupapplet.cpp

@@ -62,6 +62,7 @@ public:
 
     void togglePopup();
     void hideTimedPopup();
+    void dialogSizeChanged();
 
     PopupApplet *q;
     Plasma::Icon *icon;
@@ -207,6 +208,7 @@ void PopupApplet::constraintsEvent(Plasma::Constraints constraints)
             if (!d->dialog) {
                 d->dialog = new Plasma::Dialog();
                 d->dialog->setWindowFlags(Qt::Popup);
+                connect(d->dialog, SIGNAL(dialogResized()), this, SLOT(dialogSizeChanged()));
 
                 if (graphicsWidget()) {
                     Corona *corona = qobject_cast<Corona *>(graphicsWidget()->scene());
@@ -241,7 +243,6 @@ void PopupApplet::constraintsEvent(Plasma::Constraints constraints)
 void PopupApplet::showPopup(uint popupDuration)
 {
     if (d->dialog && (formFactor() == Horizontal || formFactor() == Vertical)) {
-        d->dialog->adjustView();
         d->dialog->move(popupPosition(d->dialog->size()));
         d->dialog->show();
 
@@ -269,24 +270,13 @@ void PopupApplet::hidePopup()
 
 void PopupApplet::widgetGeometryChanged()
 {
-    if (graphicsWidget()) {
+    if (graphicsWidget() && layout()) {
         //sizes are recalculated in the constraintsevent so let's just call that.
-        if (layout()) {
         constraintsEvent(Plasma::FormFactorConstraint);
 
         //resize vertically if necesarry.
         if (formFactor() == Plasma::MediaCenter || formFactor() == Plasma::Planar) {
             resize(QSizeF(size().width(), minimumHeight()));
-            } else {
-                if (graphicsWidget()) {
-                    graphicsWidget()->resize(graphicsWidget()->minimumSize());
-                    graphicsWidget()->update();
-                }
-                if (d->dialog) {
-                    d->dialog->adjustView();
-                    d->dialog->move(popupPosition(d->dialog->size()));
-                }
-            }
         }
     }
 }
@@ -297,7 +287,7 @@ void PopupAppletPrivate::togglePopup()
         if (dialog->isVisible()) {
             dialog->hide();
         } else {
-            dialog->move(q->popupPosition(dialog->sizeHint()));
+            dialog->move(q->popupPosition(dialog->size()));
             dialog->show();
         }
 
@@ -311,6 +301,15 @@ void PopupAppletPrivate::hideTimedPopup()
     q->hidePopup();
 }
 
+void PopupAppletPrivate::dialogSizeChanged()
+{
+    //Reposition the dialog.
+    if (dialog) {
+        dialog->updateGeometry();
+        dialog->move(q->popupPosition(dialog->size()));
+    }
+}
+
 } // Plasma namespace
 
 #include "popupapplet.moc"

popupapplet.h

@@ -106,6 +106,7 @@ protected:
 private:
     Q_PRIVATE_SLOT(d, void togglePopup())
     Q_PRIVATE_SLOT(d, void hideTimedPopup())
+    Q_PRIVATE_SLOT(d, void dialogSizeChanged())
     PopupAppletPrivate * const d;
 };