fix #411,deactivate applets when show previews

app/dockview.h

@@ -143,8 +143,6 @@ public:
 
     VisibilityManager *visibility() const;
 
-    void deactivateApplets();
-
     QQmlListProperty<QScreen> screens();
     static int countScreens(QQmlListProperty<QScreen> *property);
     static QScreen *atScreens(QQmlListProperty<QScreen> *property, int index);
@@ -157,6 +155,7 @@ public slots:
     Q_INVOKABLE QList<int> freeEdges() const;
     Q_INVOKABLE QVariantList containmentActions();
     Q_INVOKABLE int docksWithTasks();
+    Q_INVOKABLE void deactivateApplets();
     Q_INVOKABLE void removeTasksPlasmoid();
     Q_INVOKABLE bool setCurrentScreen(const QString id);
     Q_INVOKABLE bool tasksPresent();

containment/contents/ui/main.qml

@@ -595,6 +595,7 @@ DragDrop.DropArea {
             latteApplet.signalAnimationsNeedLength.connect(slotAnimationsNeedLength);
             latteApplet.signalAnimationsNeedThickness.connect(slotAnimationsNeedThickness);
             latteApplet.signalActionsBlockHiding.connect(slotActionsBlockHiding);
+            latteApplet.signalPreviewsShown.connect(slotPreviewsShown);
         }
     }
 
@@ -1087,6 +1088,12 @@ DragDrop.DropArea {
         }
     }
 
+    function slotPreviewsShown(){
+        if (dock) {
+            dock.deactivateApplets();
+        }
+    }
+
     function updateAutomaticIconSize() {
         if ((visibilityManager.normalState && !root.editMode && root.autoDecreaseIconSize)
                 && (iconSize===root.maxIconSize || iconSize === automaticIconSizeBasedSize) ) {

plasmoid/contents/ui/main.qml

@@ -171,6 +171,7 @@ Item {
     signal signalAnimationsNeedBothAxis(int value);
     signal signalAnimationsNeedLength(int value);
     signal signalAnimationsNeedThickness(int value);
+    signal signalPreviewsShown();
     //signal signalDraggingState(bool value);
     signal showPreviewForTasks(QtObject group);
     //trigger updating scaling of neighbour delegates of zoomed delegate
@@ -402,6 +403,12 @@ Item {
             if (!activeItem || (activeItem !== taskItem) && !taskItem.contextMenu) {
                 //console.log("preview show called: accepted...");
 
+                //this can be used from others to hide their appearance
+                //e.g but applets from the dock to hide themselves
+                if (!visible) {
+                    root.signalPreviewsShown();
+                }
+
                 //used to initialize windows previews buffers from task to task
                 visible = false;
                 activeItem = taskItem;