.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "gallery/user_interfaces/gtk4_spreadsheet_sgskip.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. meta::
        :keywords: codex

    .. note::
        :class: sphx-glr-download-link-note

        Click :ref:`here <sphx_glr_download_gallery_user_interfaces_gtk4_spreadsheet_sgskip.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_gallery_user_interfaces_gtk4_spreadsheet_sgskip.py:


================
GTK4 Spreadsheet
================

Example of embedding Matplotlib in an application and interacting with a
treeview to store data.  Double click on an entry to update plot data.

.. GENERATED FROM PYTHON SOURCE LINES 9-92

.. code-block:: default


    import gi
    gi.require_version('Gtk', '4.0')
    gi.require_version('Gdk', '4.0')
    from gi.repository import Gtk

    from matplotlib.backends.backend_gtk4agg import FigureCanvas  # or gtk4cairo.

    from numpy.random import random
    from matplotlib.figure import Figure


    class DataManager(Gtk.ApplicationWindow):
        num_rows, num_cols = 20, 10

        data = random((num_rows, num_cols))

        def __init__(self, *args, **kwargs):
            super().__init__(*args, **kwargs)
            self.set_default_size(600, 600)

            self.set_title('GtkListStore demo')

            vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, homogeneous=False,
                           spacing=8)
            self.set_child(vbox)

            label = Gtk.Label(label='Double click a row to plot the data')
            vbox.append(label)

            sw = Gtk.ScrolledWindow()
            sw.set_has_frame(True)
            sw.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
            sw.set_hexpand(True)
            sw.set_vexpand(True)
            vbox.append(sw)

            model = self.create_model()
            self.treeview = Gtk.TreeView(model=model)
            self.treeview.connect('row-activated', self.plot_row)
            sw.set_child(self.treeview)

            # Matplotlib stuff
            fig = Figure(figsize=(6, 4), constrained_layout=True)

            self.canvas = FigureCanvas(fig)  # a Gtk.DrawingArea
            self.canvas.set_hexpand(True)
            self.canvas.set_vexpand(True)
            vbox.append(self.canvas)
            ax = fig.add_subplot()
            self.line, = ax.plot(self.data[0, :], 'go')  # plot the first row

            self.add_columns()

        def plot_row(self, treeview, path, view_column):
            ind, = path  # get the index into data
            points = self.data[ind, :]
            self.line.set_ydata(points)
            self.canvas.draw()

        def add_columns(self):
            for i in range(self.num_cols):
                column = Gtk.TreeViewColumn(str(i), Gtk.CellRendererText(), text=i)
                self.treeview.append_column(column)

        def create_model(self):
            types = [float] * self.num_cols
            store = Gtk.ListStore(*types)
            for row in self.data:
                # Gtk.ListStore.append is broken in PyGObject, so insert manually.
                it = store.insert(-1)
                store.set(it, {i: val for i, val in enumerate(row)})
            return store


    def on_activate(app):
        manager = DataManager(application=app)
        manager.show()


    app = Gtk.Application(application_id='org.matplotlib.examples.GTK4Spreadsheet')
    app.connect('activate', on_activate)
    app.run()


.. _sphx_glr_download_gallery_user_interfaces_gtk4_spreadsheet_sgskip.py:

.. only:: html

  .. container:: sphx-glr-footer sphx-glr-footer-example


    .. container:: sphx-glr-download sphx-glr-download-python

      :download:`Download Python source code: gtk4_spreadsheet_sgskip.py <gtk4_spreadsheet_sgskip.py>`

    .. container:: sphx-glr-download sphx-glr-download-jupyter

      :download:`Download Jupyter notebook: gtk4_spreadsheet_sgskip.ipynb <gtk4_spreadsheet_sgskip.ipynb>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_