added studio view to edit audio source

audio/audio.py

@@ -35,6 +35,28 @@ class AudioXBlock(XBlock):
         frag.add_css(self.resource_string("static/css/audio.css"))
         return frag
 
+    def studio_view(self, context):
+        """
+        The view for editing the AudioXBlock parameters inside Studio.
+        """
+        html = self.resource_string("static/html/audio_edit.html")
+        frag = Fragment(html.format(src=self.src))
+
+        js = self.resource_string("static/js/src/audio_edit.js")
+        frag.add_javascript(js)
+        frag.initialize_js('AudioEditBlock')
+
+        return frag
+
+    @XBlock.json_handler
+    def studio_submit(self, data, suffix=''):
+        """
+        Called when submitting the form in Studio.
+        """
+        self.src = data.get('src')
+
+        return {'result': 'success'}
+
     # TO-DO: change this to create the scenarios you'd like to see in the
     # workbench while developing your XBlock.
     @staticmethod

audio/static/html/audio_edit.html

+<div class="wrapper-comp-settings is-active editor-with-buttons" id="settings-tab">
+  <ul class="list-input settings-list">
+    <li class="field comp-setting-entry is-set">
+      <div class="wrapper-comp-setting">
+        <label class="label setting-label" for="audio_src">Audio Source Location</label>
+        <input class="input setting-input" name="audio_src" id="audio_src" value="{src}" type="text" />
+      </div>
+    </li>
+  </ul>
+  <div class="row module-actions">
+      <a href="#" class="save-button action-primary action">Save</a>
+      <a href="#" class="cancel-button action-secondary action">Cancel</a>
+  </div>
+</div>
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audio/static/js/src/audio_edit.js

+function AudioEditBlock(runtime, element) {
+  $(element).find('.save-button').bind('click', function() {
+    var handlerUrl = runtime.handlerUrl(element, 'studio_submit');
+    var data = {
+      src: $(element).find('input[name=audio_src]').val()
+    };
+    $.post(handlerUrl, JSON.stringify(data)).done(function(response) {
+      window.location.reload(false);
+    });
+  });
+
+  $(element).find('.cancel-button').bind('click', function() {
+    runtime.notify('cancel', {});
+  });
+}
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