{
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      "cell_type": "markdown",
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      "source": [
        "\n# GTK3 spreadsheet\n\nExample of embedding Matplotlib in an application and interacting with a\ntreeview to store data.  Double-click on an entry to update plot data.\n"
      ]
    },
    {
      "cell_type": "code",
      "execution_count": null,
      "metadata": {
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      "source": [
        "import gi\n\ngi.require_version('Gtk', '3.0')\ngi.require_version('Gdk', '3.0')\nfrom gi.repository import Gdk, Gtk\n\nfrom numpy.random import random\n\nfrom matplotlib.backends.backend_gtk3agg import FigureCanvas  # or gtk3cairo.\nfrom matplotlib.figure import Figure\n\n\nclass DataManager(Gtk.Window):\n    num_rows, num_cols = 20, 10\n\n    data = random((num_rows, num_cols))\n\n    def __init__(self):\n        super().__init__()\n        self.set_default_size(600, 600)\n        self.connect('destroy', lambda win: Gtk.main_quit())\n\n        self.set_title('GtkListStore demo')\n        self.set_border_width(8)\n\n        vbox = Gtk.VBox(homogeneous=False, spacing=8)\n        self.add(vbox)\n\n        label = Gtk.Label(label='Double click a row to plot the data')\n\n        vbox.pack_start(label, False, False, 0)\n\n        sw = Gtk.ScrolledWindow()\n        sw.set_shadow_type(Gtk.ShadowType.ETCHED_IN)\n        sw.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)\n        vbox.pack_start(sw, True, True, 0)\n\n        model = self.create_model()\n\n        self.treeview = Gtk.TreeView(model=model)\n\n        # Matplotlib stuff\n        fig = Figure(figsize=(6, 4))\n\n        self.canvas = FigureCanvas(fig)  # a Gtk.DrawingArea\n        vbox.pack_start(self.canvas, True, True, 0)\n        ax = fig.add_subplot()\n        self.line, = ax.plot(self.data[0, :], 'go')  # plot the first row\n\n        self.treeview.connect('row-activated', self.plot_row)\n        sw.add(self.treeview)\n\n        self.add_columns()\n\n        self.add_events(Gdk.EventMask.BUTTON_PRESS_MASK |\n                        Gdk.EventMask.KEY_PRESS_MASK |\n                        Gdk.EventMask.KEY_RELEASE_MASK)\n\n    def plot_row(self, treeview, path, view_column):\n        ind, = path  # get the index into data\n        points = self.data[ind, :]\n        self.line.set_ydata(points)\n        self.canvas.draw()\n\n    def add_columns(self):\n        for i in range(self.num_cols):\n            column = Gtk.TreeViewColumn(str(i), Gtk.CellRendererText(), text=i)\n            self.treeview.append_column(column)\n\n    def create_model(self):\n        types = [float] * self.num_cols\n        store = Gtk.ListStore(*types)\n        for row in self.data:\n            store.append(tuple(row))\n        return store\n\n\nmanager = DataManager()\nmanager.show_all()\nGtk.main()"
      ]
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