#633 basic typeahead implementation

ng2-components/ng2-activiti-form/src/components/activiti-form.component.css

@@ -1,6 +1,7 @@
 .activiti-form-container {
     width: 100%;
     min-height: 100px;
+    overflow: visible;
 }
 
 .activiti-form-container > .mdl-card__media {

ng2-components/ng2-activiti-form/src/components/activiti-form.component.html

@@ -41,11 +41,13 @@ will be removed during future revisions
 -->
 <div class="activiti-form-debug-container">
 
-    <label class="mdl-switch mdl-js-switch mdl-js-ripple-effect" for="switch-1" [class.is-checked]="debugMode">
-        <input type="checkbox" id="switch-1" class="mdl-switch__input" [(ngModel)]="debugMode">
-        <span class="mdl-switch__label"></span>
-        <span class="debug-toggle-text">Debug mode</span>
-    </label>
+    <div style="float: right">
+        <label class="mdl-switch mdl-js-switch mdl-js-ripple-effect" for="switch-1" [class.is-checked]="debugMode">
+            <input type="checkbox" id="switch-1" class="mdl-switch__input" [(ngModel)]="debugMode">
+            <span class="mdl-switch__label"></span>
+            <span class="debug-toggle-text">Debug mode</span>
+        </label>
+    </div>
 
     <div *ngIf="debugMode && hasForm()">
         <h4>Values</h4>

ng2-components/ng2-activiti-form/src/components/widgets/container/container.widget.html

@@ -46,6 +46,9 @@
                         <div *ngSwitchCase="'upload'">
                             <upload-widget [field]="field" (fieldChanged)="fieldChanged($event);"></upload-widget>
                         </div>
+                        <div *ngSwitchCase="'typeahead'">
+                            <typeahead-widget [field]="field" (fieldChanged)="fieldChanged($event);"></typeahead-widget>
+                        </div>
                         <div *ngSwitchDefault>
                             <span>UNKNOWN WIDGET TYPE: {{field.type}}</span>
                         </div>

ng2-components/ng2-activiti-form/src/components/widgets/core/form-field-types.ts

@@ -24,6 +24,7 @@ export class FormFieldTypes {
     static DISPLAY_VALUE: string = 'readonly';
     static READONLY_TEXT: string = 'readonly-text';
     static UPLOAD: string = 'upload';
+    static TYPEAHEAD: string = 'typeahead';
 
     static READONLY_TYPES: string[] = [
         FormFieldTypes.HYPERLINK,

ng2-components/ng2-activiti-form/src/components/widgets/core/form-field.model.ts

@@ -150,9 +150,9 @@ export class FormFieldModel extends FormWidgetModel {
                  This is needed due to Activiti issue related to reading radio button values as value string
                  but saving back as object: { id: <id>, name: <name> }
                  */
-                let entry: FormFieldOption[] = this.options.filter(opt => opt.id === this.value);
-                if (entry.length > 0) {
-                    this.form.values[this.id] = entry[0];
+                let rbEntry: FormFieldOption[] = this.options.filter(opt => opt.id === this.value);
+                if (rbEntry.length > 0) {
+                    this.form.values[this.id] = rbEntry[0];
                 } else if (this.options.length > 0) {
                     this.form.values[this.id] = this.options[0];
                 }
@@ -164,6 +164,14 @@ export class FormFieldModel extends FormWidgetModel {
                     this.form.values[this.id] = null;
                 }
                 break;
+            case FormFieldTypes.TYPEAHEAD:
+                let taEntry: FormFieldOption[] = this.options.filter(opt => opt.id === this.value);
+                if (taEntry.length > 0) {
+                    this.form.values[this.id] = taEntry[0];
+                } else if (this.options.length > 0) {
+                    this.form.values[this.id] = null;
+                }
+                break;
             default:
                 if (!FormFieldTypes.isReadOnlyType(this.type)) {
                     this.form.values[this.id] = this.value;

ng2-components/ng2-activiti-form/src/components/widgets/index.ts

@@ -28,6 +28,7 @@ import { RadioButtonsWidget } from './radio-buttons/radio-buttons.widget';
 import { DisplayValueWidget } from './display-value/display-value.widget';
 import { DisplayTextWidget } from './display-text/display-text.widget';
 import { UploadWidget } from './upload/upload.widget';
+import { TypeaheadWidget } from './typeahead/typeahead.widget';
 
 // core
 export * from './widget.component';
@@ -48,6 +49,7 @@ export * from './radio-buttons/radio-buttons.widget';
 export * from './display-value/display-value.widget';
 export * from './display-text/display-text.widget';
 export * from './upload/upload.widget';
+export * from './typeahead/typeahead.widget';
 
 export const CONTAINER_WIDGET_DIRECTIVES: [any] = [
     TabsWidget,
@@ -64,7 +66,8 @@ export const PRIMITIVE_WIDGET_DIRECTIVES: [any] = [
     RadioButtonsWidget,
     DisplayValueWidget,
     DisplayTextWidget,
-    UploadWidget
+    UploadWidget,
+    TypeaheadWidget
 ];
 
 

ng2-components/ng2-activiti-form/src/components/widgets/typeahead/typeahead.widget.css

@@ -0,0 +1,29 @@
+.typeahead-widget {
+    width: 100%;
+}
+
+.typeahead-autocomplete {
+    background-color: #fff;
+    position: absolute;
+    z-index: 5;
+    color: #555;
+    margin: -15px 0 0 0;
+}
+
+.typeahead-autocomplete > ul {
+    list-style-type: none;
+    position: static;
+
+    height: auto;
+    width: auto;
+    min-width: 124px;
+    padding: 8px 0;
+    margin: 0;
+
+    box-shadow: 0 2px 2px 0 rgba(0,0,0,.14),0 3px 1px -2px rgba(0,0,0,.2),0 1px 5px 0 rgba(0,0,0,.12);
+    border-radius: 2px;
+}
+
+.typeahead-autocomplete > ul > li {
+    opacity: 1;
+}

ng2-components/ng2-activiti-form/src/components/widgets/typeahead/typeahead.widget.html

@@ -0,0 +1,22 @@
+<div class="mdl-textfield mdl-js-textfield mdl-textfield--floating-label typeahead-widget"
+     [class.is-dirty]="value">
+    <input class="mdl-textfield__input"
+           type="text"
+           [attr.id]="field.id"
+           [(ngModel)]="value"
+           (ngModelChange)="checkVisibility(field)"
+           (keyup)="onKey($event)"
+           (blur)="onBlur()"
+           [disabled]="field.readOnly">
+    <label class="mdl-textfield__label" [attr.for]="field.id">{{field.name}}</label>
+</div>
+
+<div class="typeahead-autocomplete mdl-shadow--2dp" *ngIf="popupVisible">
+    <ul>
+        <li *ngFor="let item of getOptions()"
+            class="mdl-menu__item"
+            (click)="onItemClick(item, $event)">
+            {{item.name}}
+        </li>
+    </ul>
+</div>

ng2-components/ng2-activiti-form/src/components/widgets/typeahead/typeahead.widget.ts

@@ -0,0 +1,103 @@
+/*!
+ * @license
+ * Copyright 2016 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Component, OnInit } from '@angular/core';
+import { FormService } from './../../../services/form.service';
+import { WidgetComponent } from './../widget.component';
+import { FormFieldOption } from './../core/form-field-option';
+
+declare let __moduleName: string;
+declare var componentHandler;
+
+@Component({
+    moduleId: __moduleName,
+    selector: 'typeahead-widget',
+    templateUrl: './typeahead.widget.html',
+    styleUrls: ['./typeahead.widget.css']
+})
+export class TypeaheadWidget extends WidgetComponent implements OnInit {
+
+    popupVisible: boolean = false;
+    minTermLength: number = 1;
+    value: string;
+
+    constructor(private formService: FormService) {
+        super();
+    }
+
+    ngOnInit() {
+        this.formService
+            .getRestFieldValues(
+                this.field.form.taskId,
+                this.field.id
+            )
+            .then(
+                (result: FormFieldOption[]) => {
+                    let options = result || [];
+                    this.field.options = options;
+                    this.field.updateForm();
+
+                    let fieldValue = this.field.value;
+                    if (fieldValue) {
+                        let toSelect = options.find(item => item.id === fieldValue);
+                        if (toSelect) {
+                            this.value = toSelect.name;
+                        }
+                    }
+                },
+                error => console.log(error)
+            );
+    }
+
+    getOptions(): FormFieldOption[] {
+        let val = this.value.toLocaleLowerCase();
+        return this.field.options.filter(item => {
+            let name = item.name.toLocaleLowerCase();
+            return name.indexOf(val) > -1;
+        });
+    }
+
+    onKey(event: KeyboardEvent) {
+        // this.values += (<HTMLInputElement>event.target).value + ' | ';
+        this.popupVisible = !!(this.value && this.value.length >= this.minTermLength);
+    }
+
+    onBlur() {
+        setTimeout(() => {
+            this.popupVisible = false;
+
+            let options = this.field.options || [];
+            let field = options.find(item => item.name.toLocaleLowerCase() === this.value.toLocaleLowerCase());
+            if (field) {
+                this.field.value = field.id;
+                this.value = field.name;
+            } else {
+                this.field.value = null;
+                this.value = null;
+            }
+
+            this.field.updateForm();
+        }, 200);
+    }
+
+    onItemClick(item: FormFieldOption, event: Event) {
+        event.preventDefault();
+        this.field.value = item.id;
+        this.value = item.name;
+    }
+
+}

ng2-components/ng2-activiti-form/src/services/form.service.ts

@@ -212,6 +212,11 @@ export class FormService {
             .catch(this.handleError);
     }
 
+    getRestFieldValues(taskId: string, field: string): Promise<any> {
+        let alfrescoApi = this.authService.getAlfrescoApi();
+        return alfrescoApi.activiti.taskFormsApi.getRestFieldValues(taskId, field);
+    }
+
     getFormId(res: any) {
         let result = null;