GTK4-Tabelle

Beispiel für die Einbettung von Matplotlib in eine Anwendung und die Interaktion mit einer Baumansicht zum Speichern von Daten. Doppelklicken Sie auf einen Eintrag, um die Plotdaten zu aktualisieren.

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()