work for #7104 Themes API: Rename cover -> header, list its propertie…

…s, create an interface for onThemeApplied arguments (#7112)

Co-authored-by: OlgaLarina <olga.larina.dev@gmail.com>

src/cover.ts

@@ -97,7 +97,7 @@ export class Cover extends Base {
       .toString();
   }
   public fromTheme(theme: ITheme): void {
-    super.fromJSON(theme.cover);
+    super.fromJSON(theme.header);
     if(!!theme.cssVariables) {
       this.backgroundColor = theme.cssVariables["--sjs-cover-backcolor"];
     }

src/survey-events-api.ts

@@ -13,6 +13,7 @@ import { QuestionMatrixDynamicModel } from "./question_matrixdynamic";
 import { QuestionPanelDynamicModel } from "./question_paneldynamic";
 import { SurveyModel } from "./survey";
 import { SurveyError } from "./survey-error";
+import { ITheme } from "./themes";
 import { Trigger } from "./trigger";
 
 export interface QuestionEventMixin {
@@ -941,4 +942,8 @@ export interface PopupVisibleChangedEvent extends QuestionEventMixin {
    * Indicates whether the popup is visible now.
    */
   visible: boolean;
+}
+
+export interface ThemeAppliedEvent {
+  theme: ITheme;
 }

src/survey.ts

@@ -63,7 +63,7 @@ import {
   MatrixCellValidateEvent, DynamicPanelModifiedEvent, DynamicPanelRemovingEvent, TimerPanelInfoTextEvent, DynamicPanelItemValueChangedEvent, DynamicPanelGetTabTitleEvent,
   IsAnswerCorrectEvent, DragDropAllowEvent, ScrollingElementToTopEvent, GetQuestionTitleActionsEvent, GetPanelTitleActionsEvent, GetPageTitleActionsEvent,
   GetPanelFooterActionsEvent, GetMatrixRowActionsEvent, ElementContentVisibilityChangedEvent, GetExpressionDisplayValueEvent, ServerValidateQuestionsEvent,
-  MultipleTextItemAddedEvent, MatrixColumnAddedEvent, GetQuestionDisplayValueEvent, PopupVisibleChangedEvent
+  MultipleTextItemAddedEvent, MatrixColumnAddedEvent, GetQuestionDisplayValueEvent, PopupVisibleChangedEvent, ThemeAppliedEvent
 } from "./survey-events-api";
 import { QuestionMatrixDropdownModelBase } from "./question_matrixdropdownbase";
 import { QuestionMatrixDynamicModel } from "./question_matrixdynamic";
@@ -140,7 +140,7 @@ export class SurveyModel extends SurveyElementCore
    * An event that is raised after a [theme](/form-library/documentation/manage-default-themes-and-styles) is [applied](#applyTheme) to the survey.
    * @see applyTheme
    */
-  onThemeApplied: EventBase<SurveyModel> = new EventBase<SurveyModel>();
+  onThemeApplied: EventBase<SurveyModel, ThemeAppliedEvent> = new EventBase<SurveyModel, ThemeAppliedEvent>();
 
   //#region Event declarations
   /**
@@ -7353,7 +7353,7 @@ export class SurveyModel extends SurveyElementCore
     if (!theme) return;
 
     Object.keys(theme).forEach((key: keyof ITheme) => {
-      if (key === "cover") {
+      if (key === "header") {
         this.removeLayoutElement("cover");
         const newCoverModel = new Cover();
         newCoverModel.fromTheme(theme);

src/themes.ts

@@ -58,7 +58,7 @@ export interface ITheme {
   /**
    * An object with survey header settings.
    */
-  cover?: {[index: string]: any};
+  header?: {[index: string]: any};
   /**
    * An object with CSS variables.
    */