view src/app/playback-control/playback-control.component.html @ 464:50f61d1945db

Hook up some buttons for navigating history (undo / redo). Some refactoring to allow for the audio player to get updated as a consequence of a state change (the audio related to the current top of the stack is used).

<button md-icon-button (click)="emitFastRewindStart()">
  <md-icon>skip_previous</md-icon>
</button>
<button md-icon-button (click)="emitPlayPause()">
  <md-icon>
    <ng-template [ngIf]="isPlaying()">pause</ng-template>
    <ng-template [ngIf]="!isPlaying()">play_arrow</ng-template>
  </md-icon>
</button>