Propagate UI changes

@@ -259,6 +259,8 @@ export interface IWidgetSubscription {
 
 
   subscribe(): void;
   subscribe(): void;
 
 
+  isDataResolved(): boolean;
+
   destroy(): void;
   destroy(): void;
 
 
   update(): void;
   update(): void;

@@ -112,6 +112,7 @@ export class WidgetSubscription implements IWidgetSubscription {
   init$: Observable<IWidgetSubscription>;
   init$: Observable<IWidgetSubscription>;
 
 
   cafs: {[cafId: string]: CancelAnimationFrame} = {};
   cafs: {[cafId: string]: CancelAnimationFrame} = {};
+  hasResolvedData = false;
 
 
   targetDeviceAliasId: string;
   targetDeviceAliasId: string;
   targetDeviceId: string;
   targetDeviceId: string;
@@ -249,6 +250,7 @@ export class WidgetSubscription implements IWidgetSubscription {
             } else {
             } else {
               this.rpcEnabled = this.ctx.utils.widgetEditMode ? true : false;
               this.rpcEnabled = this.ctx.utils.widgetEditMode ? true : false;
             }
             }
+            this.hasResolvedData = this.rpcEnabled;
             this.callbacks.rpcStateChanged(this);
             this.callbacks.rpcStateChanged(this);
             initRpcSubject.next();
             initRpcSubject.next();
             initRpcSubject.complete();
             initRpcSubject.complete();
@@ -275,6 +277,7 @@ export class WidgetSubscription implements IWidgetSubscription {
       } else {
       } else {
         this.rpcEnabled = this.ctx.utils.widgetEditMode ? true : false;
         this.rpcEnabled = this.ctx.utils.widgetEditMode ? true : false;
       }
       }
+      this.hasResolvedData = true;
       this.callbacks.rpcStateChanged(this);
       this.callbacks.rpcStateChanged(this);
       initRpcSubject.next();
       initRpcSubject.next();
       initRpcSubject.complete();
       initRpcSubject.complete();
@@ -286,6 +289,7 @@ export class WidgetSubscription implements IWidgetSubscription {
     const initAlarmSubscriptionSubject = new ReplaySubject(1);
     const initAlarmSubscriptionSubject = new ReplaySubject(1);
     this.loadStDiff().subscribe(() => {
     this.loadStDiff().subscribe(() => {
       if (!this.ctx.aliasController) {
       if (!this.ctx.aliasController) {
+        this.hasResolvedData = true;
         this.configureAlarmsData();
         this.configureAlarmsData();
         initAlarmSubscriptionSubject.next();
         initAlarmSubscriptionSubject.next();
         initAlarmSubscriptionSubject.complete();
         initAlarmSubscriptionSubject.complete();
@@ -293,6 +297,9 @@ export class WidgetSubscription implements IWidgetSubscription {
         this.ctx.aliasController.resolveAlarmSource(this.alarmSource).subscribe(
         this.ctx.aliasController.resolveAlarmSource(this.alarmSource).subscribe(
           (alarmSource) => {
           (alarmSource) => {
             this.alarmSource = alarmSource;
             this.alarmSource = alarmSource;
+            if (alarmSource) {
+              this.hasResolvedData = true;
+            }
             this.configureAlarmsData();
             this.configureAlarmsData();
             initAlarmSubscriptionSubject.next();
             initAlarmSubscriptionSubject.next();
             initAlarmSubscriptionSubject.complete();
             initAlarmSubscriptionSubject.complete();
@@ -313,6 +320,7 @@ export class WidgetSubscription implements IWidgetSubscription {
     const initDataSubscriptionSubject = new ReplaySubject(1);
     const initDataSubscriptionSubject = new ReplaySubject(1);
     this.loadStDiff().subscribe(() => {
     this.loadStDiff().subscribe(() => {
       if (!this.ctx.aliasController) {
       if (!this.ctx.aliasController) {
+        this.hasResolvedData = true;
         this.configureData();
         this.configureData();
         initDataSubscriptionSubject.next();
         initDataSubscriptionSubject.next();
         initDataSubscriptionSubject.complete();
         initDataSubscriptionSubject.complete();
@@ -320,6 +328,9 @@ export class WidgetSubscription implements IWidgetSubscription {
         this.ctx.aliasController.resolveDatasources(this.datasources).subscribe(
         this.ctx.aliasController.resolveDatasources(this.datasources).subscribe(
           (datasources) => {
           (datasources) => {
             this.datasources = datasources;
             this.datasources = datasources;
+            if (datasources && datasources.length) {
+              this.hasResolvedData = true;
+            }
             this.configureData();
             this.configureData();
             initDataSubscriptionSubject.next();
             initDataSubscriptionSubject.next();
             initDataSubscriptionSubject.complete();
             initDataSubscriptionSubject.complete();
@@ -804,6 +815,10 @@ export class WidgetSubscription implements IWidgetSubscription {
     return subscriptionsChanged;
     return subscriptionsChanged;
   }
   }
 
 
+  isDataResolved(): boolean {
+    return this.hasResolvedData;
+  }
+
   destroy(): void {
   destroy(): void {
     this.unsubscribe();
     this.unsubscribe();
     for (const cafId of Object.keys(this.cafs)) {
     for (const cafId of Object.keys(this.cafs)) {

@@ -352,8 +352,23 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
     this.onDestroy();
     this.onDestroy();
   }
   }
 
 
+  private displayWidgetInstance(): boolean {
+    if (this.widget.type !== widgetType.static) {
+      for (const id of Object.keys(this.widgetContext.subscriptions)) {
+        const subscription = this.widgetContext.subscriptions[id];
+        if (subscription.isDataResolved()) {
+          return true;
+        }
+      }
+      return false;
+    } else {
+      return true;
+    }
+  }
+
   private onDestroy() {
   private onDestroy() {
     if (this.widgetContext) {
     if (this.widgetContext) {
+      const shouldDestroyWidgetInstance = this.displayWidgetInstance();
       for (const id of Object.keys(this.widgetContext.subscriptions)) {
       for (const id of Object.keys(this.widgetContext.subscriptions)) {
         const subscription = this.widgetContext.subscriptions[id];
         const subscription = this.widgetContext.subscriptions[id];
         subscription.destroy();
         subscription.destroy();
@@ -369,7 +384,9 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
           }
           }
         }
         }
         try {
         try {
-          this.widgetTypeInstance.onDestroy();
+          if (shouldDestroyWidgetInstance) {
+            this.widgetTypeInstance.onDestroy();
+          }
         } catch (e) {
         } catch (e) {
           this.handleWidgetException(e);
           this.handleWidgetException(e);
         }
         }
@@ -471,7 +488,11 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
       }
       }
       this.cafs.init = this.raf.raf(() => {
       this.cafs.init = this.raf.raf(() => {
         try {
         try {
-          this.widgetTypeInstance.onInit();
+          if (this.displayWidgetInstance()) {
+            this.widgetTypeInstance.onInit();
+          } else {
+            this.loadingData = false;
+          }
           this.detectChanges();
           this.detectChanges();
         } catch (e) {
         } catch (e) {
           this.handleWidgetException(e);
           this.handleWidgetException(e);
@@ -492,7 +513,9 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
         }
         }
         this.cafs.resize = this.raf.raf(() => {
         this.cafs.resize = this.raf.raf(() => {
           try {
           try {
-            this.widgetTypeInstance.onResize();
+            if (this.displayWidgetInstance()) {
+              this.widgetTypeInstance.onResize();
+            }
           } catch (e) {
           } catch (e) {
             this.handleWidgetException(e);
             this.handleWidgetException(e);
           }
           }
@@ -513,7 +536,9 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
         }
         }
         this.cafs.editMode = this.raf.raf(() => {
         this.cafs.editMode = this.raf.raf(() => {
           try {
           try {
-            this.widgetTypeInstance.onEditModeChanged();
+            if (this.displayWidgetInstance()) {
+              this.widgetTypeInstance.onEditModeChanged();
+            }
           } catch (e) {
           } catch (e) {
             this.handleWidgetException(e);
             this.handleWidgetException(e);
           }
           }
@@ -532,7 +557,9 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
         }
         }
         this.cafs.mobileMode = this.raf.raf(() => {
         this.cafs.mobileMode = this.raf.raf(() => {
           try {
           try {
-            this.widgetTypeInstance.onMobileModeChanged();
+            if (this.displayWidgetInstance()) {
+              this.widgetTypeInstance.onMobileModeChanged();
+            }
           } catch (e) {
           } catch (e) {
             this.handleWidgetException(e);
             this.handleWidgetException(e);
           }
           }
@@ -781,7 +808,9 @@ export class WidgetComponent extends PageComponent implements OnInit, AfterViewI
     options.callbacks = {
     options.callbacks = {
       onDataUpdated: () => {
       onDataUpdated: () => {
         try {
         try {
-          this.widgetTypeInstance.onDataUpdated();
+          if (this.displayWidgetInstance()) {
+            this.widgetTypeInstance.onDataUpdated();
+          }
         } catch (e){}
         } catch (e){}
       },
       },
       onDataUpdateError: (subscription, e) => {
       onDataUpdateError: (subscription, e) => {