demo(icon): Add an accessibility demo page for icon (#6348)

* demo(icon): Add an accessibility demo page for icon

* Changed to use cases in material.angular.io

* addressed comments

Author: tinayuangao

src/demo-app/a11y/a11y-module.ts

@@ -13,6 +13,7 @@ import {ChipsAccessibilityDemo} from './chips/chips-a11y';
 import {GridListAccessibilityDemo} from './grid-list/grid-list-a11y';
 import {RadioAccessibilityDemo} from './radio/radio-a11y';
 import {DatepickerAccessibilityDemo} from './datepicker/datepicker-a11y';
+import {IconAccessibilityDemo} from './icon/icon-a11y';
 import {InputAccessibilityDemo} from './input/input-a11y';
 import {ProgressSpinnerAccessibilityDemo} from './progress-spinner/progress-spinner-a11y';
 import {SliderAccessibilityDemo} from './slider/slider-a11y';
@@ -46,6 +47,7 @@ export class AccessibilityRoutingModule {}
     ChipsAccessibilityDemo,
     DatepickerAccessibilityDemo,
     GridListAccessibilityDemo,
+    IconAccessibilityDemo,
     InputAccessibilityDemo,
     ProgressSpinnerAccessibilityDemo,
     RadioAccessibilityDemo,

src/demo-app/a11y/a11y.ts

@@ -24,6 +24,7 @@ export class AccessibilityDemo {
     {name: 'Chips', route: 'chips'},
     {name: 'Datepicker', route: 'datepicker'},
     {name: 'Grid list', route: 'grid-list'},
+    {name: 'Icon', route: 'icon'},
     {name: 'Input', route: 'input'},
     {name: 'Progress spinner', route: 'progress-spinner'},
     {name: 'Radio buttons', route: 'radio'},

src/demo-app/a11y/icon/icon-a11y.html

@@ -0,0 +1,30 @@
+<section>
+  <h2>Fingerprint status</h2>
+  <p>Showing a status message with a purely decorative icon</p>
+  <md-icon color="primary">fingerprint</md-icon>
+  Your fingerprint was recorded!
+</section>
+
+<section>
+  <h2>Delete icon button </h2>
+  <p>Showing a button with interactive icon which can perform an action</p>
+  <button md-icon-button aria-label="Delete" (click)="deleteIcon()">
+    <md-icon color="accent">delete</md-icon>
+  </button>
+</section>
+
+<section>
+  <h2>Home link </h2>
+  <p>Showing a link with interactive icon</p>
+  <a md-icon-button aria-label="Home" href="http://www.google.com">
+    <md-icon color="warn">home</md-icon>
+  </a>
+</section>
+
+<section>
+  <h2>Done status </h2>
+  <p>Showing a status indicator with an indicator icon</p>
+  <md-icon color="primary">done</md-icon>
+  <span class="cdk-visually-hidden">Done</span>
+  Tasks
+</section>

src/demo-app/a11y/icon/icon-a11y.ts

@@ -0,0 +1,16 @@
+import {Component, ViewEncapsulation} from '@angular/core';
+import {MdSnackBar} from '@angular/material';
+
+@Component({
+  moduleId: module.id,
+  selector: 'icon-a11y',
+  templateUrl: 'icon-a11y.html',
+  encapsulation: ViewEncapsulation.None,
+})
+export class IconAccessibilityDemo {
+  constructor(private snackBar: MdSnackBar) {}
+
+  deleteIcon() {
+    this.snackBar.open('Item deleted', '', {duration: 2000});
+  }
+}

src/demo-app/a11y/routes.ts

@@ -8,6 +8,7 @@ import {GridListAccessibilityDemo} from './grid-list/grid-list-a11y';
 import {RadioAccessibilityDemo} from './radio/radio-a11y';
 import {AccessibilityHome} from './a11y';
 import {DatepickerAccessibilityDemo} from './datepicker/datepicker-a11y';
+import {IconAccessibilityDemo} from './icon/icon-a11y';
 import {InputAccessibilityDemo} from './input/input-a11y';
 import {ProgressSpinnerAccessibilityDemo} from './progress-spinner/progress-spinner-a11y';
 import {SliderAccessibilityDemo} from './slider/slider-a11y';
@@ -21,6 +22,7 @@ export const ACCESSIBILITY_DEMO_ROUTES: Routes = [
   {path: 'chips', component: ChipsAccessibilityDemo},
   {path: 'datepicker', component: DatepickerAccessibilityDemo},
   {path: 'grid-list', component: GridListAccessibilityDemo},
+  {path: 'icon', component: IconAccessibilityDemo},
   {path: 'input', component: InputAccessibilityDemo},
   {path: 'progress-spinner', component: ProgressSpinnerAccessibilityDemo},
   {path: 'radio', component: RadioAccessibilityDemo},