added example notebook for toolbar_visible

Author: psteegstra

examples/header_visible.ipynb

@@ -0,0 +1,98 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "%matplotlib widget"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "ExecuteTime": {
+     "end_time": "2019-08-07T08:07:06.908562Z",
+     "start_time": "2019-08-07T08:07:06.602919Z"
+    }
+   },
+   "outputs": [],
+   "source": [
+    "import matplotlib.pyplot as plt"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "fig, ax = plt.subplots()\n",
+    "fig.canvas.layout.width = '7in'\n",
+    "fig.canvas.layout.height= '5in'\n",
+    "\n",
+    "# if I hide the header here, I get a libpng error\n",
+    "# fig.canvas.header_visible = False\n",
+    "\n",
+    "ax.plot([1,2,3], [4,5,3])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# hiding after rendering works\n",
+    "fig.canvas.header_visible = False"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# hiding together with calls to toolbar options, work.\n",
+    "fig, ax = plt.subplots()\n",
+    "fig.canvas.layout.width = '7in'\n",
+    "fig.canvas.layout.height= '5in'\n",
+    "\n",
+    "fig.canvas.toolbar_visible = False\n",
+    "fig.canvas.header_visible = False\n",
+    "\n",
+    "ax.plot([1,2,3], [4,5,3])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}