track changes in destroyed()

Change-Id: Ibc4dcc64028e1127dd55e7c7d4d73000d2964dab

src/plasma/applet.cpp

@@ -258,6 +258,7 @@ void Applet::destroy()
     }
 
     d->transient = true;
+    emit destroyedChanged(true);
     //FIXME: an animation on leave if !isContainment() would be good again .. which should be handled by the containment class
     d->cleanUpAndDelete();
 }

src/plasma/applet.h

@@ -383,6 +383,13 @@ Q_SIGNALS:
      */
     void statusChanged(Plasma::Types::ItemStatus status);
 
+    /**
+     * Emitted when the applet has been scheduled for destruction
+     * or the destruction has been undone
+     * @since 5.4
+     */
+    void destroyedChanged(bool destroyed);
+
 //CONFIGURATION
     /**
      * Emitted when an applet has changed values in its configuration

src/plasma/private/applet_p.cpp

@@ -232,6 +232,7 @@ void AppletPrivate::askDestroy()
         //There is no confirmation anymore for panels removal:
         //this needs users feedback
         transient = true;
+        emit q->destroyedChanged(true);
         //no parent, but it won't leak, since it will be closed both in case of timeout
         //or direct action
         deleteNotification = new KNotification("plasmoidDeleted", KNotification::Persistent, 0);
@@ -242,6 +243,7 @@ void AppletPrivate::askDestroy()
         QObject::connect(deleteNotification.data(), &KNotification::action1Activated,
                 [=]() {
                     transient = false;
+                    emit q->destroyedChanged(false);
                     if (!q->isContainment() && q->containment()) {
                         //make sure the applets are sorted by id
                         auto position = std::lower_bound(q->containment()->d->applets.begin(), q->containment()->d->applets.end(), q, [](Plasma::Applet *a1,  Plasma::Applet *a2) {
@@ -263,6 +265,7 @@ void AppletPrivate::askDestroy()
                     //If the timer still exists, it meand the undo action was NOT triggered
                     if (deleteNotificationTimer) {
                         transient = true;
+                        emit q->destroyedChanged(true);
                         cleanUpAndDelete();
                     }
                 });
@@ -279,6 +282,7 @@ void AppletPrivate::askDestroy()
                         deleteNotification->close();
                     }
                     transient = true;
+                    emit q->destroyedChanged(true);
                     cleanUpAndDelete();
                 });
             deleteNotificationTimer->start();

src/scriptengines/qml/plasmoid/appletinterface.cpp

@@ -73,6 +73,11 @@ AppletInterface::AppletInterface(DeclarativeAppletScript *script, const QVariant
     connect(applet(), &Plasma::Applet::statusChanged,
             this, &AppletInterface::statusChanged);
 
+    connect(applet(), &Plasma::Applet::destroyedChanged,
+            [=] () {
+                setVisible(!applet()->destroyed());
+            });
+
     connect(applet(), &Plasma::Applet::activated,
             this, &AppletInterface::activated);
 
@@ -125,6 +130,11 @@ AppletInterface::AppletInterface(Plasma::Applet *a, const QVariantList &args, QQ
     connect(applet(), &Plasma::Applet::statusChanged,
             this, &AppletInterface::statusChanged);
 
+    connect(applet(), &Plasma::Applet::destroyedChanged,
+            [=] () {
+                setVisible(!applet()->destroyed());
+            });
+
     connect(appletScript(), &DeclarativeAppletScript::formFactorChanged,
             this, &AppletInterface::formFactorChanged);
     connect(appletScript(), &DeclarativeAppletScript::locationChanged,