add CoreViewModel for drag&drop

src/ViewModel/Pages/boardViewModel.ts

@@ -6,6 +6,7 @@ import BoardsAndTasksModel, {
 } from "../../Model/Files/boardsAndTasksModel";
 
 import { Color } from "../../colors";
+import CoreViewModel from "../Global/coreViewModel";
 import { IndexManager } from "../../Model/Utility/utility";
 import StorageModel from "../../Model/Global/storageModel";
 import TaskPageViewModel from "./taskPageViewModel";
@@ -79,6 +80,7 @@ export default class BoardViewModel {
       this.boardInfo.fileId
     );
     const taskViewModel: TaskViewModel = new TaskViewModel(
+      this.coreViewModel,
       this.boardModel,
       this,
       taskFileContent
@@ -110,6 +112,7 @@ export default class BoardViewModel {
   // view
   showTaskInList = (taskFileContent: TaskFileContent): void => {
     const taskViewModel: TaskViewModel = new TaskViewModel(
+      this.coreViewModel,
       this.boardModel,
       this,
       taskFileContent
@@ -195,6 +198,7 @@ export default class BoardViewModel {
       if (taskFileContent == null) continue;
 
       const taskViewModel: TaskViewModel = new TaskViewModel(
+        this.coreViewModel,
         this.boardModel,
         this,
         taskFileContent
@@ -212,6 +216,7 @@ export default class BoardViewModel {
 
   // init
   constructor(
+    public coreViewModel: CoreViewModel,
     storageModel: StorageModel,
     boardModel: BoardsAndTasksModel,
     taskPageViewModel: TaskPageViewModel,

src/ViewModel/Pages/messagePageViewModel.ts

@@ -3,6 +3,7 @@ import * as React from "bloatless-react";
 import { ChatMessage } from "../../Model/Chat/chatModel";
 import ChatMessageViewModel from "../Chat/chatMessageViewModel";
 import ChatViewModel from "../Chat/chatViewModel";
+import CoreViewModel from "../Global/coreViewModel";
 
 export default class MessagePageViewModel {
   chatViewModel: ChatViewModel;
@@ -39,6 +40,7 @@ export default class MessagePageViewModel {
   // view
   showChatMessage = (chatMessage: ChatMessage): void => {
     const chatMessageModel = new ChatMessageViewModel(
+      this.coreViewModel,
       this,
       chatMessage,
       chatMessage.sender == this.chatViewModel.settingsViewModel.username.value
@@ -62,9 +64,12 @@ export default class MessagePageViewModel {
   };
 
   // init
-  constructor(chatViewModel: ChatViewModel) {
+  constructor(
+    public coreViewModel: CoreViewModel,
+    chatViewModel: ChatViewModel
+  ) {
     this.chatViewModel = chatViewModel;
-    
+
     this.cannotSendMessage = React.createProxyState(
       [this.chatViewModel.settingsViewModel.username, this.composingMessage],
       () =>

src/ViewModel/Pages/settingsPageViewModel.ts

@@ -2,6 +2,7 @@ import * as React from "bloatless-react";
 
 import ChatViewModel from "../Chat/chatViewModel";
 import { Color } from "../../colors";
+import CoreViewModel from "../Global/coreViewModel";
 
 export default class SettingsPageViewModel {
   chatViewModel: ChatViewModel;
@@ -110,7 +111,10 @@ export default class SettingsPageViewModel {
   };
 
   // init
-  constructor(chatViewModel: ChatViewModel) {
+  constructor(
+    public coreViewModel: CoreViewModel,
+    chatViewModel: ChatViewModel
+  ) {
     this.chatViewModel = chatViewModel;
     this.loadListRelevantData();
 

src/ViewModel/Pages/taskPageViewModel.ts

@@ -4,6 +4,7 @@ import BoardsAndTasksModel, { BoardInfoFileContent } from "../../Model/Files/boa
 
 import BoardViewModel from "./boardViewModel";
 import ChatViewModel from "../Chat/chatViewModel";
+import CoreViewModel from "../Global/coreViewModel";
 import { IndexManager } from "../../Model/Utility/utility";
 import StorageModel from "../../Model/Global/storageModel";
 
@@ -73,6 +74,7 @@ export default class TaskPageViewModel {
   // view
   showBoardInList = (boardInfo: BoardInfoFileContent): void => {
     const boardViewModel: BoardViewModel = new BoardViewModel(
+      this.coreViewModel,
       this.storageModel,
       this.boardModel,
       this,
@@ -140,6 +142,7 @@ export default class TaskPageViewModel {
 
   // init
   constructor(
+    public coreViewModel: CoreViewModel,
     storageModel: StorageModel,
     boardModel: BoardsAndTasksModel,
     chatViewModel: ChatViewModel

src/ViewModel/Pages/taskViewModel.ts

@@ -4,6 +4,7 @@ import BoardsAndTasksModel, { TaskFileContent } from "../../Model/Files/boardsAn
 import { localeCompare, padZero } from "../../Model/Utility/utility";
 
 import BoardViewModel from "./boardViewModel";
+import CoreViewModel from "../Global/coreViewModel";
 
 export default class TaskViewModel {
   boardModel: BoardsAndTasksModel;
@@ -138,6 +139,7 @@ export default class TaskViewModel {
 
   // init
   constructor(
+    public coreViewModel: CoreViewModel,
     boardModel: BoardsAndTasksModel,
     boardViewModel: BoardViewModel,
     taskFileContent: TaskFileContent