systray: show a small animation on the icons when activated

Summary: Both for plasmoids and SNI

Test Plan: Now there's some kind of feedback when pressing the icons

Reviewers: #plasma, ngraham

Reviewed By: ngraham

Subscribers: filipf, broulik, anthonyfieroni, davidedmundson, ngraham, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D19947

applets/systemtray/package/contents/ui/items/AbstractItem.qml

@@ -17,7 +17,7 @@
  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  */
 
-import QtQuick 2.1
+import QtQuick 2.2
 import org.kde.plasma.core 2.0 as PlasmaCore
 import org.kde.plasma.components 2.0 as PlasmaComponents
 
@@ -102,8 +102,32 @@ PlasmaCore.ToolTipArea {
             units.longDuration > 0
     }
 
+    function activated() {
+        activatedAnimation.start()
+    }
+
+    SequentialAnimation {
+        id: activatedAnimation
+        loops: 1
+
+        ScaleAnimator {
+            target: iconItem
+            from: 1
+            to: 0.5
+            duration: units.shortDuration
+            easing.type: Easing.InQuad
+        }
+
+        ScaleAnimator {
+            target: iconItem
+            from: 0.5
+            to: 1
+            duration: units.shortDuration
+            easing.type: Easing.OutQuad
+        }
+    }
+
     MouseArea {
-        id: mouseArea
         anchors.fill: abstractItem
         hoverEnabled: true
         drag.filterChildren: true

applets/systemtray/package/contents/ui/items/PlasmoidItem.qml

@@ -66,6 +66,8 @@ AbstractItem {
     }
     Connections {
         target: applet
+        onActivated: plasmoidContainer.activated()
+
         onExpandedChanged: {
             if (expanded) {
                 var oldApplet = root.activeApplet;
@@ -74,6 +76,7 @@ AbstractItem {
                     oldApplet.expanded = false;
                 }
                 dialog.visible = true;
+                plasmoidContainer.activated()
 
             } else if (root.activeApplet === applet) {
                 if (!applet.parent.hidden) {

applets/systemtray/package/contents/ui/items/StatusNotifierItem.qml

@@ -90,6 +90,7 @@ AbstractItem {
                     openContextMenu(pos);
                 }
             });
+            taskIcon.activated()
             break;
         }
         case Qt.RightButton:
@@ -103,6 +104,7 @@ AbstractItem {
 
             operation.y = pos.y;
             service.startOperationCall(operation);
+            taskIcon.activated()
             break;
         }
     }