Allow remove

examples/widgetapp/assets/widget.coffee

@@ -166,6 +166,7 @@ class WSF_CONTROL
       @controls=(build_control(control_name, state, @) for control_name, state of @fullstate.controls)
     else
       @controls = []
+    return
 
   attach_events: ()->
     console.log "Attached #{@control_name}"
@@ -190,6 +191,7 @@ class WSF_CONTROL
           fn(action)
       catch e
         console.log "Failed preforming action #{action.type}"
+    return
  
   process_update: (new_states)->
     try
@@ -204,8 +206,6 @@ class WSF_CONTROL
       return
     return
     
-    
-
   get_context_state : ()->
     if @parent_control? and not @isolation
       return @parent_control.get_context_state()
@@ -372,6 +372,8 @@ class WSF_FILE_CONTROL extends WSF_CONTROL
     @uploading = false
 
   start_upload: ()->
+    if @$el[0].files.length==0
+      return
     if @uploading
       return 
     @uploading = true
@@ -415,14 +417,15 @@ class WSF_FILE_CONTROL extends WSF_CONTROL
 
   change: ()->
     #update local state
-    @state['file'] = null
-    @state['type'] = null
-    @state['size'] = null 
+    @state['file_name'] = null
+    @state['file_type'] = null
+    @state['file_size'] = null 
+    @state['file_id'] = null 
     if @$el[0].files.length>0
       file = @$el[0].files[0]
-      @state['file'] = file.name
-      @state['type'] = file.type
-      @state['size'] = file.size
+      @state['file_name'] = file.name
+      @state['file_type'] = file.type
+      @state['file_size'] = file.size
     if @state['callback_change']
       @trigger_callback(@control_name, 'change')
     @trigger('change')
@@ -431,10 +434,39 @@ class WSF_FILE_CONTROL extends WSF_CONTROL
     return @$el.val()
 
   update: (state) ->
-    if state.upload_file?
-      @progressbar.hide()
-      @$el.parent().append($("""<p></p>""").addClass("form-control-static").text(@state['file']))
-      @state['upload_file'] = state.upload_file
+    if state.removable != undefined
+      @state['removable'] = state.removable
+    if state.file_name != undefined
+      @state['file_name'] = state.file_name 
+    if state.file_type  != undefined
+      @state['file_type'] = state.file_type 
+    if state.file_size  != undefined
+      @state['file_size'] = state.file_size 
+    if state.file_id != undefined
+      @uploading = false
+      @progressbar.remove()
+      @state['file_id'] = state.file_id
+      @$el.parent().find("p").remove()
+      if state.file_id!=null
+        @$el.hide()
+        fname = $("""<p></p>""").addClass("form-control-static").text(@state['file_name'])
+        @$el.parent().append(fname)
+        if @state['removable']
+          fname.append(" ");
+          btn = $("<button />").text("Remove").addClass("btn btn-xs btn-danger")
+          self = @
+          btn.click ()->
+            self.progressbar.remove()
+            self.$el.parent().find("p").remove()
+            self.$el.show()
+            self.$el.val('')
+            self.change()
+          fname.append(btn)
+      else
+        @$el.show()
+        @$el.val('')
+        @change()
+
 
 class WSF_PASSWORD_CONTROL extends   WSF_INPUT_CONTROL