adding header_visible toggle to hide or show the title/header in mpl figure

Author: psteegstra

ipympl/backend_nbagg.py

@@ -149,6 +149,9 @@ class Canvas(DOMWidget, FigureCanvasWebAggCore):
     toolbar = Instance(Toolbar, allow_none=True).tag(sync=True, **widget_serialization)
     toolbar_visible = Bool(True).tag(sync=True)
     toolbar_position = Enum(['top', 'bottom', 'left', 'right'], default_value='left').tag(sync=True)
+
+    header_visible = Bool(True).tag(sync=True)
+
     _closed = Bool(True)
 
     # Must declare the superclass private members.

js/src/mpl_widget.js

@@ -16,6 +16,7 @@ var MPLCanvasModel = widgets.DOMWidgetModel.extend({
             _view_module: 'jupyter-matplotlib',
             _model_module_version: '^'+ version,
             _view_module_version: '^' + version,
+            header_visible: true,
             toolbar: null,
             toolbar_visible: true,
             toolbar_position: 'horizontal'
@@ -64,6 +65,7 @@ var MPLCanvasView = widgets.DOMWidgetView.extend({
 
     model_events: function() {
         this.model.on('msg:custom', this.on_comm_message.bind(this));
+        this.model.on('change:header_visible', this.update_header_visible.bind(this));
         this.model.on('change:toolbar_visible', this.update_toolbar_visible.bind(this));
         this.model.on('change:toolbar_position', this.update_toolbar_position.bind(this));
     },
@@ -78,6 +80,11 @@ var MPLCanvasView = widgets.DOMWidgetView.extend({
         this.send_message('initialized');
     },
 
+    update_header_visible: function() {
+        this.header.style.display = this.model.get('header_visible') ? '': 'none';
+        this.request_resize();
+    },
+
     update_toolbar_visible: function() {
         this.toolbar_view.el.style.display = this.model.get('toolbar_visible') ? '' : 'none';
         this.request_resize();