activity switching animation

src/plasmaquick/plasmaquickview.cpp

@@ -72,7 +72,6 @@ void PlasmaQuickViewPrivate::setContainment(Plasma::Containment *cont)
             qDebug() << "Old graphics Object:" << oldGraphicObject << "Old containment" << containment.data();
             //make sure the graphic object won't die with us
             //FIXME:we need a way to reparent to *NO* graphics item, but this makes Qt crash
-            oldGraphicObject->setProperty("visible", false);
             oldGraphicObject->setParent(containment.data());
         }
     }
@@ -112,7 +111,6 @@ void PlasmaQuickViewPrivate::setContainment(Plasma::Containment *cont)
                                    (cont->containmentType() == Plasma::Types::DesktopContainment ||
                                     cont->containmentType() == Plasma::Types::CustomContainment));
         graphicObject->setProperty("parent", QVariant::fromValue(q->rootObject()));
-        graphicObject->setProperty("visible", true);
         q->rootObject()->setProperty("containment", QVariant::fromValue(graphicObject));
     } else {
         qWarning() << "Containment graphic object not valid";

src/shell/qmlpackages/desktop/contents/views/Desktop.qml

@@ -31,15 +31,82 @@ Rectangle {
     property Item containment
 
     onContainmentChanged: {
-        print("New Containment: " + containment)
+        print("New Containment: " + containment);
-        //containment.parent = root
+        print("Old Containment: " + internal.oldContainment);
-        containment.visible = true
+        //containment.parent = root;
-        containment.anchors.fill = root
+        containment.visible = true;
+        
+        internal.newContainment = containment;
+        if (internal.oldContainment && internal.oldContainment != containment) {
+            switchAnim.running = true;
+        } else {
+            internal.oldContainment = containment;
+        }
     }
 
+    //some properties that shouldn't be accessible from elsewhere
+    QtObject {
+        id: internal;
+
+        property Item oldContainment;
+        property Item newContainment;
+    }
+
+    SequentialAnimation {
+        id: switchAnim
+        ScriptAction {
+            script: {
+                containment.anchors.left = undefined;
+                containment.anchors.top = undefined;
+                containment.anchors.right = undefined;
+                containment.anchors.bottom = undefined;
+
+                internal.oldContainment.anchors.left = undefined;
+                internal.oldContainment.anchors.top = undefined;
+                internal.oldContainment.anchors.right = undefined;
+                internal.oldContainment.anchors.bottom = undefined;
+
+                internal.oldContainment.z = 0;
+                internal.oldContainment.x = 0;
+                containment.z = 1;
+                containment.x = root.width;
+            }
+        }
+        ParallelAnimation {
+            NumberAnimation {
+                target: internal.oldContainment
+                properties: "x"
+                to: -root.width
+                duration: 400
+                easing.type: Easing.InOutQuad
+            }
+            NumberAnimation {
+                target: internal.newContainment
+                properties: "x"
+                to: 0
+                duration: 250
+                easing.type: Easing.InOutQuad
+            }
+        }
+        ScriptAction {
+            script: {
+                containment.anchors.left = root.left;
+                containment.anchors.top = root.top;
+                containment.anchors.right = root.right;
+                containment.anchors.bottom = root.bottom;
+
+                internal.oldContainment.visible = false;
+                internal.oldContainment = containment;
+            }
+        }
+    }
+
+    
     Component.onCompleted: {
+        //configure the view behavior
         desktop.stayBehind = true;
         desktop.fillScreen = true;
         print("View QML loaded")
     }
+
 }