Finish nbagg file saver

Author: blink1073

lib/matplotlib/backends/web_backend/nbagg_mpl.js

@@ -31,8 +31,8 @@ mpl.mpl_figure_comm = function(comm, msg) {
     var ws_proxy = comm_websocket_adapter(comm)
 
     function ondownload(figure, format) {
-        var fileElem = document.getElementById("file_selector");
-        fileElem.click();
+        var canvasData = figure.canvas.toDataURL("image/" + format);
+        window.open(canvasData);
     }
 
     var fig = new mpl.figure(id, ws_proxy,
@@ -113,19 +113,11 @@ mpl.figure.prototype._init_toolbar = function() {
         nav_element.append(button);
     }
 
-    var inp = $('<input type="file" id="file_selector" name="file" style="display:none"/>');
-
-    inp.on('change', function (event) {
-        console.log(event);
-    });
-
-    nav_element.append(inp);
-
     var fmt_picker_span = $('<span/>');
 
     var fmt_picker = $('<select width="75" style="width: 75px; margin-top: 10px"</select>');
     fmt_picker.addClass('mpl-toolbar-optionui-widget ui-widget-content');
-    //fmt_picker_span.append(fmt_picker);
+    fmt_picker_span.append(fmt_picker);
     nav_element.append(fmt_picker_span);
     this.format_dropdown = fmt_picker[0];