.. _user_interfaces-gtk_spreadsheet:

user_interfaces example code: gtk_spreadsheet.py
================================================

[`source code <gtk_spreadsheet.py>`_]

::

    #!/usr/bin/env python
    """
    Example of embedding matplotlib in an application and interacting with
    a treeview to store data.  Double click on an entry to update plot
    data
    
    """
    import pygtk
    pygtk.require('2.0')
    import gtk
    from gtk import gdk
    
    import matplotlib
    matplotlib.use('GTKAgg')  # or 'GTK'
    from matplotlib.backends.backend_gtk import FigureCanvasGTK as FigureCanvas
    
    from numpy.random import random
    from matplotlib.figure import Figure
    
    
    class DataManager(gtk.Window):
        numRows, numCols = 20,10
    
        data = random((numRows, numCols))
    
        def __init__(self):
            gtk.Window.__init__(self)
            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(False, 8)
            self.add(vbox)
    
            label = gtk.Label('Double click a row to plot the data')
    
            vbox.pack_start(label, False, False)
    
            sw = gtk.ScrolledWindow()
            sw.set_shadow_type(gtk.SHADOW_ETCHED_IN)
            sw.set_policy(gtk.POLICY_NEVER,
                          gtk.POLICY_AUTOMATIC)
            vbox.pack_start(sw, True, True)
    
            model = self.create_model()
    
            self.treeview = gtk.TreeView(model)
            self.treeview.set_rules_hint(True)
    
    
            # matplotlib stuff
            fig = Figure(figsize=(6,4))
    
            self.canvas = FigureCanvas(fig)  # a gtk.DrawingArea
            vbox.pack_start(self.canvas, True, True)
            ax = fig.add_subplot(111)
            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.BUTTON_PRESS_MASK |
                            gdk.KEY_PRESS_MASK|
                            gdk.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.numCols):
                column = gtk.TreeViewColumn('%d'%i, gtk.CellRendererText(), text=i)
                self.treeview.append_column(column)
    
    
        def create_model(self):
            types = [float]*self.numCols
            store = gtk.ListStore(*types)
    
            for row in self.data:
                store.append(row)
            return store
    
    
    manager = DataManager()
    manager.show_all()
    gtk.main()
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)