GTK3-Tabellenkalkulation

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

import gi

gi.require_version('Gtk', '3.0')
gi.require_version('Gdk', '3.0')
from gi.repository import Gdk, Gtk

from numpy.random import random

from matplotlib.backends.backend_gtk3agg import FigureCanvas  # or gtk3cairo.
from matplotlib.figure import Figure


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

    data = random((num_rows, num_cols))

    def __init__(self):
        super().__init__()
        self.set_default_size(600, 600)
        self.connect('destroy', lambda win: Gtk.main_quit())

        self.set_title('GtkListStore demo')
        self.set_border_width(8)

        vbox = Gtk.VBox(homogeneous=False, spacing=8)
        self.add(vbox)

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

        vbox.pack_start(label, False, False, 0)

        sw = Gtk.ScrolledWindow()
        sw.set_shadow_type(Gtk.ShadowType.ETCHED_IN)
        sw.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
        vbox.pack_start(sw, True, True, 0)

        model = self.create_model()

        self.treeview = Gtk.TreeView(model=model)

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

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

        self.treeview.connect('row-activated', self.plot_row)
        sw.add(self.treeview)

        self.add_columns()

        self.add_events(Gdk.EventMask.BUTTON_PRESS_MASK |
                        Gdk.EventMask.KEY_PRESS_MASK |
                        Gdk.EventMask.KEY_RELEASE_MASK)

    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:
            store.append(tuple(row))
        return store


manager = DataManager()
manager.show_all()
Gtk.main()