added a workaround for overlapping widgets

kabuki/frame.py

@@ -30,13 +30,15 @@ class Frame(Column):
 
         self.btn_cfg.on_click(self.do_click_cfg)
 
+        self.dummy = dummy = Div(width=0, height=0)
+
         # wrap fig and cfg such that their container can be hidden during the visibility switch
         # wrap with another container to maintain size
         # combined gives a relatively smooth (albeit slow) transition between the two states
         self.inner = inner = Row(plt, cfg)
         size_maintainer = Row(inner, min_width=plt.width, min_height=plt.height) #TODO: why min_* ?
 
-        super().__init__(header, size_maintainer, Spacer(height=35), name=name)
+        super().__init__(header, size_maintainer, Spacer(height=35), dummy, name=name)
 
 
     def on_click_close(self, handler):
@@ -47,11 +49,12 @@ class Frame(Column):
         self.btn_close.on_click(wrapper)
 
     def do_click_cfg(self):
-        toggle_button_state(self.btn_close) # do not close plot from cfg dialog
         toggle_button_type(self.btn_cfg, "default", "warning")
+        toggle_button_state(self.btn_close) # do not close plot from cfg dialog
         self.inner.visible = False
         switch_visibility(self.plt, self.cfg)
         self.inner.visible = True
+        toggle_visibility(self.dummy) # workaround for overlapping widgets
 
 
 
@@ -64,5 +67,8 @@ def toggle_button_type(btn, type1, type2):
 def switch_visibility(a, b):
     a.visible, b.visible = b.visible, a.visible
 
+def toggle_visibility(a):
+    a.visible = not a.visible
+