virtual scroll of organization is implemented

projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-side.component.scss

@@ -63,7 +63,7 @@
       justify-content: center;
       align-items: center;
       transform: scale(0.9);
-      transition: transform .3s cubic-bezier(.4,0,0,1);
+      transition: transform 0.3s cubic-bezier(0.4, 0, 0, 1);
 
       svg {
         width: 24px;
@@ -82,7 +82,7 @@
     .mat-tab-label-content {
       .icon-item {
         background: #ef4c73;
-        transform: scale(1.0);
+        transform: scale(1);
         /*svg {
           stroke: #ef4c73;
           fill: #ef4c73;

projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/group.component.ts

@@ -71,7 +71,7 @@ export class GroupComponent implements OnInit, OnDestroy {
     UserInfo | UserInfoSS | UserInfoF | UserInfoDN
   >();
 
-  @ViewChild('groupExpansionPanel', { static: true })
+  @ViewChild('groupExpansionPanel', { static: false })
   groupExpansionPanel: GroupExpansionPanelComponent;
 
   @ViewChild('profileContextMenuTrigger', { static: true })

projects/ucap-webmessenger-app/src/app/layouts/messenger/components/left-sidenav/organization.component.html

@@ -10,7 +10,7 @@
   >
   </ucap-organization-tenant-search>
 </div>
-<div class="oraganization-tab" *ngIf="departmentInfoList$ | async">
+<div class="oraganization-tab">
   <div class="oraganization-tab-tree">
     <ucap-organization-tree
       [oraganizationList]="departmentInfoList$ | async"

projects/ucap-webmessenger-app/src/app/layouts/messenger/components/messages.component.ts

@@ -6,7 +6,7 @@ import {
   ElementRef,
   AfterViewInit,
   Output,
-  EventEmitter,
+  EventEmitter
 } from '@angular/core';
 import {
   ucapAnimations,
@@ -20,7 +20,7 @@ import {
   AlertDialogData,
   AlertDialogResult,
   FileUploadQueueComponent,
-  StringUtil,
+  StringUtil
 } from '@ucap-webmessenger/ui';
 import { Store, select } from '@ngrx/store';
 import { NGXLogger } from 'ngx-logger';
@@ -33,7 +33,7 @@ import {
   isRecallable,
   InfoResponse,
   EventJson,
-  FileEventJson,
+  FileEventJson
 } from '@ucap-webmessenger/protocol-event';
 
 import * as AppStore from '@app/store';
@@ -47,36 +47,36 @@ import {
   EnvironmentsInfo,
   KEY_ENVIRONMENTS_INFO,
   UserSelectDialogType,
-  RightDrawer,
+  RightDrawer
 } from '@app/types';
 import { RoomInfo, UserInfo, RoomType } from '@ucap-webmessenger/protocol-room';
 import { tap, take, map, catchError } from 'rxjs/operators';
 import {
   FileInfo,
-  FormComponent as UCapUiChatFormComponent,
+  FormComponent as UCapUiChatFormComponent
 } from '@ucap-webmessenger/ui-chat';
 import { KEY_VER_INFO } from '@app/types/ver-info.type';
 import { VersionInfo2Response } from '@ucap-webmessenger/api-public';
 import {
   MatMenuTrigger,
   MatSnackBarRef,
-  SimpleSnackBar,
+  SimpleSnackBar
 } from '@angular/material';
 import {
   CommonApiService,
   FileUploadItem,
   FileTalkSaveRequest,
-  FileTalkSaveResponse,
+  FileTalkSaveResponse
 } from '@ucap-webmessenger/api-common';
 import {
   CreateChatDialogComponent,
   CreateChatDialogData,
-  CreateChatDialogResult,
+  CreateChatDialogResult
 } from '../dialogs/chat/create-chat.dialog.component';
 import {
   FileViewerDialogComponent,
   FileViewerDialogData,
-  FileViewerDialogResult,
+  FileViewerDialogResult
 } from '@app/layouts/common/dialogs/file-viewer.dialog.component';
 import { CONST, FileUtil } from '@ucap-webmessenger/core';
 import { PerfectScrollbarComponent } from 'ngx-perfect-scrollbar';
@@ -84,12 +84,12 @@ import { StatusCode } from '@ucap-webmessenger/api';
 import {
   EditChatRoomDialogComponent,
   EditChatRoomDialogResult,
-  EditChatRoomDialogData,
+  EditChatRoomDialogData
 } from '../dialogs/chat/edit-chat-room.dialog.component';
 import {
   SelectGroupDialogComponent,
   SelectGroupDialogResult,
-  SelectGroupDialogData,
+  SelectGroupDialogData
 } from '../dialogs/group/select-group.dialog.component';
 import { GroupDetailData } from '@ucap-webmessenger/protocol-sync';
 
@@ -97,7 +97,7 @@ import { GroupDetailData } from '@ucap-webmessenger/protocol-sync';
   selector: 'app-layout-messenger-messages',
   templateUrl: './messages.component.html',
   styleUrls: ['./messages.component.scss'],
-  animations: ucapAnimations,
+  animations: ucapAnimations
 })
 export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
   @Output()
@@ -379,7 +379,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
           // duration: 3000,
           verticalPosition: 'bottom',
           horizontalPosition: 'center',
-          panelClass: ['chat-snackbar-class'],
+          panelClass: ['chat-snackbar-class']
         });
         this.snackBarPreviewEvent.onAction().subscribe(() => {
           this.setEventMoreInit();
@@ -420,7 +420,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
         EventStore.info({
           roomSeq: this.roomInfo.roomSeq,
           baseSeq: seq,
-          requestCount: CONST.EVENT_INFO_READ_COUNT,
+          requestCount: CONST.EVENT_INFO_READ_COUNT
         })
       );
     }
@@ -438,8 +438,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
         width: '360px',
         data: {
           title: 'Alert',
-          message: `대화내용을 입력해주세요.`,
+          message: `대화내용을 입력해주세요.`
-        },
+        }
       });
       return;
     }
@@ -453,8 +453,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
             roomSeq: this.roomInfo.roomSeq,
             eventType: EventType.MassText,
             // sentMessage: message.replace(/\n/gi, '\r\n')
-            sentMessage: message,
+            sentMessage: message
-          },
+          }
         })
       );
     } else {
@@ -464,8 +464,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
           req: {
             roomSeq: this.roomInfo.roomSeq,
             eventType: EventType.Character,
-            sentMessage: message,
+            sentMessage: message
-          },
+          }
         })
       );
     }
@@ -479,7 +479,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
   onMassDetail(value: number) {
     this.store.dispatch(
       ChatStore.selectedMassDetail({
-        massEventSeq: value,
+        massEventSeq: value
       })
     );
   }
@@ -491,7 +491,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
       FileViewerDialogResult
     >(FileViewerDialogComponent, {
       position: {
-        top: '30px',
+        top: '30px'
       },
       maxWidth: '100vw',
       maxHeight: '100vh',
@@ -504,8 +504,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
         downloadUrl: this.sessionVerInfo.downloadUrl,
         deviceType: this.environmentsInfo.deviceType,
         token: this.loginRes.tokenString,
-        userSeq: this.loginRes.userSeq,
+        userSeq: this.loginRes.userSeq
-      },
+      }
     });
   }
 
@@ -531,7 +531,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
 
     const info = {
       senderSeq: this.loginRes.userSeq,
-      roomSeq: this.roomInfo.roomSeq,
+      roomSeq: this.roomInfo.roomSeq
     };
 
     const allObservables: Observable<FileTalkSaveResponse>[] = [];
@@ -552,7 +552,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
           'rv',
           'ts',
           'webm',
-          'wmv',
+          'wmv'
         ].indexOf(FileUtil.getExtension(fileUploadItem.file.name))
       ) {
         thumbnail = await FileUtil.thumbnail(fileUploadItem.file);
@@ -567,7 +567,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
         file: fileUploadItem.file,
         fileName: fileUploadItem.file.name,
         thumb: thumbnail,
-        fileUploadItem,
+        fileUploadItem
       };
 
       allObservables.push(
@@ -599,8 +599,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                 req: {
                   roomSeq: info.roomSeq,
                   eventType: EventType.File,
-                  sentMessage: res.returnJson,
+                  sentMessage: res.returnJson
-                },
+                }
               })
             );
           }
@@ -626,7 +626,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
     this.messageContextMenuTrigger.menu.focusFirstItem('mouse');
     this.messageContextMenuTrigger.menuData = {
       message: params.message,
-      loginRes: this.loginRes,
+      loginRes: this.loginRes
     };
     this.messageContextMenuTrigger.openMenu();
   }
@@ -646,7 +646,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                   this.snackBarService.open('클립보드에 복사되었습니다.', '', {
                     duration: 3000,
                     verticalPosition: 'top',
-                    horizontalPosition: 'center',
+                    horizontalPosition: 'center'
                   });
                 }
               }
@@ -658,7 +658,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                     userSeq: this.loginRes.userSeq,
                     deviceType: this.environmentsInfo.deviceType,
                     token: this.loginRes.tokenString,
-                    eventMassSeq: message.seq,
+                    eventMassSeq: message.seq
                   })
                   .pipe(take(1))
                   .subscribe(res => {
@@ -669,7 +669,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                         {
                           duration: 3000,
                           verticalPosition: 'top',
-                          horizontalPosition: 'center',
+                          horizontalPosition: 'center'
                         }
                       );
                     }
@@ -693,8 +693,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
             data: {
               type: UserSelectDialogType.MessageForward,
               title: 'MessageForward',
-              ignoreRoom: [this.roomInfo],
+              ignoreRoom: [this.roomInfo]
-            },
+            }
           });
 
           if (!!result && !!result.choice && result.choice) {
@@ -718,10 +718,10 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                   req: {
                     roomSeq: '-999',
                     eventType: message.type,
-                    sentMessage: message.sentMessage,
+                    sentMessage: message.sentMessage
                   },
                   trgtUserSeqs: userSeqs,
-                  trgtRoomSeq: roomSeq,
+                  trgtRoomSeq: roomSeq
                 })
               );
             }
@@ -737,9 +737,9 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                 req: {
                   roomSeq: '-999',
                   eventType: message.type,
-                  sentMessage: message.sentMessage,
+                  sentMessage: message.sentMessage
                 },
-                trgtUserSeqs: [this.loginRes.talkWithMeBotSeq],
+                trgtUserSeqs: [this.loginRes.talkWithMeBotSeq]
               })
             );
           }
@@ -755,15 +755,15 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
             width: '220px',
             data: {
               title: 'Delete',
-              html: `선택한 메시지를 삭제하시겠습니까?<br/>삭제된 메시지는 내 대화방에서만 적용되며 상대방의 대화방에서는 삭제되지 않습니다.`,
+              html: `선택한 메시지를 삭제하시겠습니까?<br/>삭제된 메시지는 내 대화방에서만 적용되며 상대방의 대화방에서는 삭제되지 않습니다.`
-            },
+            }
           });
 
           if (!!result && !!result.choice && result.choice) {
             this.store.dispatch(
               EventStore.del({
                 roomSeq: this.roomInfo.roomSeq,
-                eventSeq: message.seq,
+                eventSeq: message.seq
               })
             );
           }
@@ -779,8 +779,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
             width: '220px',
             data: {
               title: 'ReCall',
-              html: `해당 대화를 회수하시겠습니까?<br/>상대방 대화창에서도 회수됩니다.`,
+              html: `해당 대화를 회수하시겠습니까?<br/>상대방 대화창에서도 회수됩니다.`
-            },
+            }
           });
 
           if (!!result && !!result.choice && result.choice) {
@@ -788,7 +788,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
               EventStore.cancel({
                 roomSeq: this.roomInfo.roomSeq,
                 eventSeq: message.seq,
-                deviceType: this.environmentsInfo.deviceType,
+                deviceType: this.environmentsInfo.deviceType
               })
             );
           }
@@ -805,7 +805,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
         {
           this.store.dispatch(
             ChatStore.selectedRightDrawer({
-              req: RightDrawer.AlbumBox,
+              req: RightDrawer.AlbumBox
             })
           );
         }
@@ -814,7 +814,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
         {
           this.store.dispatch(
             ChatStore.selectedRightDrawer({
-              req: RightDrawer.FileBox,
+              req: RightDrawer.FileBox
             })
           );
         }
@@ -823,7 +823,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
         {
           this.store.dispatch(
             ChatStore.selectedRightDrawer({
-              req: RightDrawer.RoomUser,
+              req: RightDrawer.RoomUser
             })
           );
         }
@@ -841,8 +841,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
               title: 'Edit Chat Member',
               curRoomUser: this.userInfoList.filter(
                 user => user.seq !== this.loginRes.userSeq
-              ),
+              )
-            },
+            }
           });
 
           if (!!result && !!result.choice && result.choice) {
@@ -864,8 +864,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                 RoomStore.inviteOrOpen({
                   req: {
                     divCd: 'Invite',
-                    userSeqs,
+                    userSeqs
-                  },
+                  }
                 })
               );
             }
@@ -881,8 +881,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
           >(SelectGroupDialogComponent, {
             width: '600px',
             data: {
-              title: 'Group Select',
+              title: 'Group Select'
-            },
+            }
           });
 
           if (!!result && !!result.choice && result.choice) {
@@ -899,7 +899,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
               this.store.dispatch(
                 SyncStore.updateGroupMember({
                   oldGroup,
-                  trgtUserSeq,
+                  trgtUserSeq
                 })
               );
             }
@@ -916,8 +916,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
             width: '600px',
             data: {
               title: 'Edit Chat Room',
-              roomInfo: this.roomInfo,
+              roomInfo: this.roomInfo
-            },
+            }
           });
 
           if (!!result && !!result.choice && result.choice) {
@@ -934,8 +934,8 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
                   roomName,
                   receiveAlarm: roomInfo.receiveAlarm,
                   syncAll:
-                    roomNameChangeTarget.toUpperCase() === 'ALL' ? true : false,
+                    roomNameChangeTarget.toUpperCase() === 'ALL' ? true : false
-                },
+                }
               })
             );
 
@@ -947,7 +947,7 @@ export class MessagesComponent implements OnInit, OnDestroy, AfterViewInit {
               this.store.dispatch(
                 RoomStore.updateTimeRoomInterval({
                   roomSeq: roomInfo.roomSeq,
-                  timerInterval: timeRoomInterval,
+                  timerInterval: timeRoomInterval
                 })
               );
             }

projects/ucap-webmessenger-ui-chat/src/lib/components/messages.component.html

@@ -1,4 +1,4 @@
-<div class="chat-messages">
+<div class="chat-messages" #scrollMe>
   <!-- <div class="message-row" *ngIf="eventRemain">
     <button mat-button (click)="onClickMore($event)">이전 대화 보기</button>
   </div> -->

projects/ucap-webmessenger-ui-organization/src/lib/components/tree.component.html

@@ -1,17 +1,27 @@
+<cdk-virtual-scroll-viewport #cvsvOrganization itemSize="48" fxFlexFill>
+  <ng-container
+    *cdkVirtualFor="let node of dataSource.expandedData$"
+  ></ng-container>
   <mat-tree
     #orgranizationTree
     [dataSource]="dataSource"
     [treeControl]="treeControl"
     class="organization-tree"
   >
-  <mat-nested-tree-node *matTreeNodeDef="let node">
+    <!-- This is the tree node template for leaf nodes -->
+    <mat-tree-node *matTreeNodeDef="let node" matTreeNodePadding>
       <li>
         <div class="mat-tree-node" (click)="onClickNode(node)">
-        {{ node.title }}
+          {{ node.name }}
         </div>
       </li>
-  </mat-nested-tree-node>
+    </mat-tree-node>
-  <mat-nested-tree-node *matTreeNodeDef="let node; when: hasChildren" class="tree-node-frame">
+    <!-- This is the tree node template for expandable nodes -->
+    <mat-tree-node
+      *matTreeNodeDef="let node; when: hasChild"
+      matTreeNodePadding
+      class="tree-node-frame"
+    >
       <li>
         <div class="mat-tree-node" (click)="onClickNode(node)" class="path">
           <span class="horizontal-line"></span>
@@ -26,10 +36,12 @@
               {{ treeControl.isExpanded(node) ? 'remove' : 'add' }}
             </mat-icon>
           </button>
-        <span class="dept-name">{{ node.title }}</span>
+          <span class="dept-name">{{ node.name }}</span>
         </div>
         <ul
-        [class.organization-tree-node-invisible]="!treeControl.isExpanded(node)"
+          [class.organization-tree-node-invisible]="
+            !treeControl.isExpanded(node)
+          "
         >
           <div *ngIf="treeControl.isExpanded(node)" class="boxnone">
             <div class="vertical-line"></div>
@@ -37,5 +49,6 @@
           </div>
         </ul>
       </li>
-  </mat-nested-tree-node>
+    </mat-tree-node>
   </mat-tree>
+</cdk-virtual-scroll-viewport>

projects/ucap-webmessenger-ui-organization/src/lib/components/tree.component.scss

@@ -42,14 +42,14 @@ ul .tree-node-frame li .path > .horizontal-line{
 .boxnone {
   position: relative;
   .vertical-line {
-    background: rgba(189,189,189,.4);
+    background: rgba(189, 189, 189, 0.4);
     bottom: 6px;
     display: block;
     position: absolute;
     top: 0px;
     width: 2px;
   }
-  .mat-nested-tree-node:last-child{
+  .mat-tree-node:last-child {
     padding-bottom: 10px;
   }
 }

projects/ucap-webmessenger-ui-organization/src/lib/components/tree.component.ts

@@ -8,39 +8,26 @@ import {
   EventEmitter,
   AfterViewInit
 } from '@angular/core';
-import { MatTreeNestedDataSource, MatTree } from '@angular/material';
+import { MatTreeFlattener, MatTree } from '@angular/material';
-import { NestedTreeControl } from '@angular/cdk/tree';
-import { BehaviorSubject } from 'rxjs';
 import { NGXLogger } from 'ngx-logger';
 
 import { DeptInfo } from '@ucap-webmessenger/protocol-query';
 import { LoginResponse } from '@ucap-webmessenger/protocol-authentication';
+import { FlatTreeControl } from '@angular/cdk/tree';
+import { CdkVirtualScrollViewport } from '@angular/cdk/scrolling';
+import { VirtualScrollTreeFlatDataSource } from '@ucap-webmessenger/ui';
 
-export class OraganizationNode {
+interface OrganizationNode {
-  private childNodeBehaviorSubject: BehaviorSubject<OraganizationNode[]>;
+  deptInfo: DeptInfo;
-  private childNodeList: OraganizationNode[];
+  name: string;
-
+  children?: OrganizationNode[];
-  get title(): string {
-    return this.deptInfo.name;
 }
 
-  get children(): BehaviorSubject<OraganizationNode[]> {
+/** Flat node with expandable and level information */
-    if (!this.childNodeBehaviorSubject) {
+interface FlatNode {
-      this.childNodeBehaviorSubject = new BehaviorSubject(
+  expandable: boolean;
-        undefined === this.childNodeList ? [] : this.childNodeList
+  name: string;
-      );
+  level: number;
-    }
-    return this.childNodeBehaviorSubject;
-  }
-
-  constructor(public deptInfo: DeptInfo) {}
-
-  addChild(childNode: OraganizationNode) {
-    if (!this.childNodeList) {
-      this.childNodeList = [];
-    }
-    this.childNodeList.push(childNode);
-  }
 }
 
 @Component({
@@ -55,87 +42,96 @@ export class TreeComponent implements OnInit, AfterViewInit {
   @Input()
   loginRes: LoginResponse;
   @Input()
-  set oraganizationList(deptInfo: DeptInfo[]) {
+  set oraganizationList(deptInfoList: DeptInfo[]) {
-    const nodeMap = new Map<number, OraganizationNode>();
+    if (!deptInfoList || 0 === deptInfoList.length) {
-    const rootNodeList: OraganizationNode[] = [];
-    const remainChildNodeList: OraganizationNode[] = [];
-    let myNode: OraganizationNode;
-
-    deptInfo.forEach(value => {
-      const node = new OraganizationNode(value);
-      if (nodeMap.has(value.seq)) {
-        this.logger.warn('duplicate seq', value.seq);
       return;
     }
-      nodeMap.set(value.seq, node);
+    const nodeMap = new Map<number, OrganizationNode>();
+    const rootNodeList: OrganizationNode[] = [];
+    const remainChildNodeList: OrganizationNode[] = [];
+    let myNode: OrganizationNode;
 
-      if (value.seq === this.loginRes.departmentCode) {
+    deptInfoList.forEach(deptInfo => {
+      const node: OrganizationNode = {
+        deptInfo,
+        name: deptInfo.name,
+        children: []
+      };
+      if (nodeMap.has(deptInfo.seq)) {
+        this.logger.warn('duplicate seq', deptInfo.seq);
+        return;
+      }
+      nodeMap.set(deptInfo.seq, node);
+
+      if (deptInfo.seq === this.loginRes.departmentCode) {
         myNode = node;
       }
 
-      if (0 === value.parentSeq) {
+      if (0 === deptInfo.parentSeq) {
         rootNodeList.push(node);
         return;
       }
 
-      if (nodeMap.has(value.parentSeq)) {
+      if (nodeMap.has(deptInfo.parentSeq)) {
-        nodeMap.get(value.parentSeq).addChild(node);
+        nodeMap.get(deptInfo.parentSeq).children.push(node);
       } else {
         remainChildNodeList.push(node);
       }
     });
 
-    remainChildNodeList.forEach(value => {
+    remainChildNodeList.forEach(node => {
-      if (nodeMap.has(value.deptInfo.parentSeq)) {
+      if (nodeMap.has(node.deptInfo.parentSeq)) {
-        nodeMap.get(value.deptInfo.parentSeq).addChild(value);
+        nodeMap.get(node.deptInfo.parentSeq).children.push(node);
       }
     });
-
     this.dataSource.data = rootNodeList;
-    // console.log('myNode', myNode);
-    // console.log('this.dataSource.data', this.dataSource.data[0]);
-    // this.treeControl.expandDescendants(this.dataSource.data[2]);
-    // console.log('this.dataSource', this.dataSource);
-    // console.log('this.dataSource.data', this.dataSource.data);
-    // console.log('this.treeControl', this.treeControl);
-    // console.log('this.treeControl.dataNodes', this.treeControl.dataNodes);
-
-    // const myNode = this.treeControl.dataNodes.filter(
-    //   node => node.deptInfo.seq === this.loginRes.departmentCode
-    // );
-    // if (!!myNode && myNode.length > 0) {
-    //   this.treeControl.expand(myNode[0]);
-    // }
   }
 
-  @ViewChild('orgranizationTree', { static: true })
+  @ViewChild('cvsvOrganization', { static: false })
-  orgranizationTree: MatTree<OraganizationNode>;
+  cvsvOrganization: CdkVirtualScrollViewport;
 
-  levels = new Map<OraganizationNode, number>();
+  @ViewChild('orgranizationTree', { static: false })
-  treeControl: NestedTreeControl<OraganizationNode>;
+  orgranizationTree: MatTree<OrganizationNode>;
 
-  dataSource: MatTreeNestedDataSource<OraganizationNode>;
+  treeControl: FlatTreeControl<FlatNode>;
+  treeFlattener: MatTreeFlattener<OrganizationNode, FlatNode>;
+  dataSource: VirtualScrollTreeFlatDataSource<OrganizationNode, FlatNode>;
 
   constructor(
     private changeDetectorRef: ChangeDetectorRef,
     private logger: NGXLogger
   ) {
-    this.treeControl = new NestedTreeControl<OraganizationNode>(
+    this.treeControl = new FlatTreeControl<FlatNode>(
-      this.getChildren
+      node => node.level,
+      node => node.expandable
     );
-    this.dataSource = new MatTreeNestedDataSource();
+    this.treeFlattener = new MatTreeFlattener<OrganizationNode, FlatNode>(
+      (node: OrganizationNode, level: number) => {
+        return {
+          expandable: !!node.children && node.children.length > 0,
+          name: node.name,
+          level
+        };
+      },
+      node => node.level,
+      node => node.expandable,
+      node => node.children
+    );
+    this.dataSource = new VirtualScrollTreeFlatDataSource<
+      OrganizationNode,
+      FlatNode
+    >(this.treeControl, this.treeFlattener);
   }
 
   ngOnInit() {}
 
-  ngAfterViewInit(): void {}
+  ngAfterViewInit(): void {
+    this.dataSource.cdkVirtualScrollViewport = this.cvsvOrganization;
+  }
 
-  getChildren = (node: OraganizationNode) => node.children;
+  hasChild = (_: number, node: FlatNode) => node.expandable;
 
-  hasChildren = (index: number, node: OraganizationNode) =>
+  onClickNode(node: OrganizationNode) {
-    0 < node.children.value.length;
-
-  onClickNode(node: OraganizationNode) {
     this.selected.emit(node.deptInfo);
   }
 }

projects/ucap-webmessenger-ui-organization/src/lib/ucap-ui-organization.module.ts

@@ -2,6 +2,8 @@ import { NgModule, ModuleWithProviders } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { ReactiveFormsModule } from '@angular/forms';
 
+import { FlexLayoutModule } from '@angular/flex-layout';
+
 import { ScrollingModule } from '@angular/cdk/scrolling';
 
 import { MatButtonModule } from '@angular/material/button';
@@ -21,6 +23,7 @@ const SERVICES = [];
     CommonModule,
     ReactiveFormsModule,
 
+    FlexLayoutModule,
     ScrollingModule,
 
     MatButtonModule,

projects/ucap-webmessenger-ui/src/lib/data-source/virtual-scroll-tree-flat.data-source.ts

@@ -0,0 +1,126 @@
+import { CollectionViewer, DataSource } from '@angular/cdk/collections';
+import { FlatTreeControl } from '@angular/cdk/tree';
+import {
+  BehaviorSubject,
+  merge,
+  Observable,
+  Subject,
+  Subscription
+} from 'rxjs';
+import { map, share } from 'rxjs/operators';
+import { MatTreeFlattener } from '@angular/material';
+import { CdkVirtualScrollViewport } from '@angular/cdk/scrolling';
+
+export class VirtualScrollTreeFlatDataSource<T, F> extends DataSource<F> {
+  private flattenedDataSubject = new BehaviorSubject<F[]>([]);
+
+  private expandedDataSubject = new BehaviorSubject<F[]>([]);
+  expandedData$: Observable<F[]>;
+
+  private connectSubject: Subject<F[]>;
+  private dataChangeSubscription: Subscription;
+  private rangeChangeSubscription: Subscription;
+
+  private rangeSubject: BehaviorSubject<{
+    start: number;
+    end: number;
+  }>;
+
+  // tslint:disable-next-line: variable-name
+  private _cdkVirtualScrollViewport: CdkVirtualScrollViewport;
+  set cdkVirtualScrollViewport(
+    cdkVirtualScrollViewport: CdkVirtualScrollViewport
+  ) {
+    if (!cdkVirtualScrollViewport) {
+      return;
+    }
+    this._cdkVirtualScrollViewport = cdkVirtualScrollViewport;
+    this.rangeSubject = new BehaviorSubject<{ start: number; end: number }>({
+      start: 0,
+      end: 1
+    });
+
+    this.rangeChangeSubscription = cdkVirtualScrollViewport.renderedRangeStream.subscribe(
+      range => {
+        this.rangeSubject.next({
+          start: range.start,
+          end: range.end
+        });
+        if (!!this.connectSubject) {
+          this.connectSubject.next(
+            this.expandedDataSubject.value.slice(
+              this.rangeSubject.value.start,
+              this.rangeSubject.value.end
+            )
+          );
+        }
+      }
+    );
+  }
+
+  // tslint:disable-next-line: variable-name
+  private _data: BehaviorSubject<T[]>;
+  get data() {
+    return this._data.value;
+  }
+  set data(value: T[]) {
+    this._data.next(value);
+    this.flattenedDataSubject.next(this.treeFlattener.flattenNodes(this.data));
+    this.treeControl.dataNodes = this.flattenedDataSubject.value;
+  }
+
+  constructor(
+    private treeControl: FlatTreeControl<F>,
+    private treeFlattener: MatTreeFlattener<T, F>,
+    initialData: T[] = []
+  ) {
+    super();
+    this._data = new BehaviorSubject<T[]>(initialData);
+    this.expandedData$ = this.expandedDataSubject.asObservable().pipe(share());
+  }
+
+  connect(collectionViewer: CollectionViewer): Observable<F[]> {
+    this.connectSubject = new Subject<F[]>();
+
+    this.dataChangeSubscription = merge(
+      collectionViewer.viewChange,
+      this.treeControl.expansionModel.changed,
+      this.flattenedDataSubject
+    )
+      .pipe(
+        map(() => {
+          this.expandedDataSubject.next(
+            this.treeFlattener.expandFlattenedNodes(
+              this.flattenedDataSubject.value,
+              this.treeControl
+            )
+          );
+
+          return !this.rangeSubject
+            ? this.expandedDataSubject.value
+            : this.expandedDataSubject.value.slice(
+                this.rangeSubject.value.start,
+                this.rangeSubject.value.end
+              );
+        })
+      )
+      .subscribe(datas => {
+        this.connectSubject.next(datas);
+        if (!!this._cdkVirtualScrollViewport) {
+          this._cdkVirtualScrollViewport.checkViewportSize();
+        }
+      });
+
+    return this.connectSubject.asObservable();
+  }
+
+  disconnect() {
+    if (!!this.dataChangeSubscription) {
+      this.dataChangeSubscription.unsubscribe();
+    }
+
+    if (!!this.rangeChangeSubscription) {
+      this.rangeChangeSubscription.unsubscribe();
+    }
+  }
+}

projects/ucap-webmessenger-ui/src/public-api.ts

@@ -13,6 +13,8 @@ export * from './lib/components/file-upload-queue.component';
 export * from './lib/components/file-viewer.component';
 export * from './lib/components/float-action-button.component';
 
+export * from './lib/data-source/virtual-scroll-tree-flat.data-source';
+
 export * from './lib/dialogs/alert.dialog.component';
 export * from './lib/dialogs/confirm.dialog.component';