add select install dir

app/app-detail.component.html

@@ -104,7 +104,7 @@
                     <div class="input-group">
                         <input type="text" [(ngModel)]="appsService.installConfig.installDir" name="installDir" class="form-control" placeholder="安装位置">
                         <span class="input-group-btn">
-                            <button class="btn btn-secondary" type="button">浏览</button>
+                            <button (click)="openDir()" class="btn btn-secondary" type="button">浏览</button>
                         </span>
                     </div>
                 </div>

app/app-detail.component.ts

@@ -14,6 +14,8 @@ declare var $;
 export class AppDetailComponent {
     platform = process.platform;
 
+    electron = window['System']._nodeRequire('electron');
+
     constructor(private appsService: AppsService, private routingService: RoutingService ) {
     }
     _currentApp;
@@ -126,8 +128,13 @@ export class AppDetailComponent {
         }
 
         $("#install-modal").modal("hide");
+    }
 
-
+    openDir() {
+        let dir = this.electron.remote.dialog.showOpenDialog({properties: ['openFile', 'openDirectory']});
+        console.log(dir);
+        this.appsService.installConfig.installDir = dir[0];
+        return dir[0];
     }
 
 }