Added Export As button

calls nbconvert...

examples/widgets/Export As (nbconvert).ipynb

@@ -0,0 +1,194 b''
+{
+ "metadata": {
+  "name": ""
+ },
+ "nbformat": 3,
+ "nbformat_minor": 0,
+ "worksheets": [
+  {
+   "cells": [
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "from IPython.html import widgets\n",
+      "from IPython.display import display, Javascript, clear_output\n",
+      "from IPython.nbconvert import get_export_names, export_by_name\n",
+      "from IPython.nbconvert.writers import FilesWriter\n",
+      "from IPython.nbformat import current"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 1
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Create and *display* a StringWidget without a view.  The StringWidget will be used to store the notebook name which is otherwise only available in the front-end."
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "notebook_name = widgets.StringWidget(default_view_name='')\n",
+      "display(notebook_name)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 2
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Get the current notebook's name by pushing JavaScript to the browser that sets the notebook name in a string widget."
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "js = \"\"\"var model = IPython.notebook.kernel.comm_manager.comms['{comm_id}'].model;\n",
+      "model.set('value', IPython.notebook.notebook_name);\n",
+      "model.save();\"\"\".format(comm_id=notebook_name._comm.comm_id)\n",
+      "display(Javascript(data=js))"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "javascript": [
+        "var model = IPython.notebook.kernel.comm_manager.comms['79dbd18695b3432b94e2265533474474'].model;\n",
+        "model.set('value', IPython.notebook.notebook_name);\n",
+        "model.save();"
+       ],
+       "metadata": {},
+       "output_type": "display_data",
+       "text": [
+        "<IPython.core.display.Javascript at 0x208f110>"
+       ]
+      }
+     ],
+     "prompt_number": 3
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "filename = notebook_name.value\n",
+      "filename"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [
+      {
+       "metadata": {},
+       "output_type": "pyout",
+       "prompt_number": 4,
+       "text": [
+        "u'Export As (nbconvert).ipynb'"
+       ]
+      }
+     ],
+     "prompt_number": 4
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Create the widget that will allow the user to Export the current notebook."
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "container = widgets.ContainerWidget()\n",
+      "container.vbox()\n",
+      "container.align_center()\n",
+      "\n",
+      "options = widgets.ContainerWidget(parent=container)\n",
+      "options.hbox()\n",
+      "options.align_center()\n",
+      "exporter_names = widgets.SelectionWidget(parent=options, values=get_export_names(), value='html')\n",
+      "export_button = widgets.ButtonWidget(parent=options, description=\"Export\")\n",
+      "\n",
+      "download_link = widgets.StringWidget(parent=container, default_view_name=\"LabelView\", visible=False)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 5
+    },
+    {
+     "cell_type": "markdown",
+     "metadata": {},
+     "source": [
+      "Export the notebook when the export button is clicked."
+     ]
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "file_writer = FilesWriter()\n",
+      "\n",
+      "def export(name, nb):\n",
+      "    \n",
+      "    # Get a unique key for the notebook and set it in the resources object.\n",
+      "    notebook_name = name[:name.rfind('.')]\n",
+      "    resources = {}\n",
+      "    resources['unique_key'] = notebook_name\n",
+      "    resources['output_files_dir'] = '%s_files' % notebook_name\n",
+      "\n",
+      "    # Try to export\n",
+      "    try:\n",
+      "        output, resources = export_by_name(exporter_names.value, nb)\n",
+      "    except ConversionException as e:\n",
+      "        download_link.value = \"<br>Could not export notebook!\"\n",
+      "    else:\n",
+      "        write_results = file_writer.write(output, resources, notebook_name=notebook_name)\n",
+      "    \n",
+      "        download_link.value = \"<br>Results: <a href='files/{filename}'><i>\\\"{filename}\\\"</i></a>\".format(filename=write_results)\n",
+      "        download_link.visible = True"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 6
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "def handle_export():\n",
+      "    with open(filename, 'r') as f:\n",
+      "        export(filename, current.read(f, 'json'))\n",
+      "export_button.on_click(handle_export)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 7
+    },
+    {
+     "cell_type": "code",
+     "collapsed": false,
+     "input": [
+      "download_link.visible = False\n",
+      "display(container)"
+     ],
+     "language": "python",
+     "metadata": {},
+     "outputs": [],
+     "prompt_number": 8
+    }
+   ],
+   "metadata": {}
+  }
+ ]
+}
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