.. _user_interfaces-mpl_with_glade:

user_interfaces example code: mpl_with_glade.py
===============================================

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

::

    #!/usr/bin/env python
    
    from __future__ import print_function
    import matplotlib
    matplotlib.use('GTK')
    
    from matplotlib.figure import Figure
    from matplotlib.axes import Subplot
    from matplotlib.backends.backend_gtkagg import FigureCanvasGTKAgg as FigureCanvas
    from matplotlib.backends.backend_gtkagg import NavigationToolbar2GTKAgg as NavigationToolbar
    from matplotlib.widgets import SpanSelector
    
    from numpy import arange, sin, pi
    import gtk
    import gtk.glade
    
    
    def simple_msg(msg, parent=None, title=None):
        dialog = gtk.MessageDialog(
            parent         = None,
            type           = gtk.MESSAGE_INFO,
            buttons        = gtk.BUTTONS_OK,
            message_format = msg)
        if parent is not None:
            dialog.set_transient_for(parent)
        if title is not None:
            dialog.set_title(title)
        dialog.show()
        dialog.run()
        dialog.destroy()
        return None
    
    
    
    class GladeHandlers:
        def on_buttonClickMe_clicked(event):
            simple_msg('Nothing to say, really',
                       parent=widgets['windowMain'],
                       title='Thanks!')
    
    class WidgetsWrapper:
        def __init__(self):
            self.widgets = gtk.glade.XML('mpl_with_glade.glade')
            self.widgets.signal_autoconnect(GladeHandlers.__dict__)
    
            self['windowMain'].connect('destroy', lambda x: gtk.main_quit())
            self['windowMain'].move(10,10)
            self.figure = Figure(figsize=(8,6), dpi=72)
            self.axis = self.figure.add_subplot(111)
    
            t = arange(0.0,3.0,0.01)
            s = sin(2*pi*t)
            self.axis.plot(t,s)
            self.axis.set_xlabel('time (s)')
            self.axis.set_ylabel('voltage')
    
            self.canvas = FigureCanvas(self.figure) # a gtk.DrawingArea
            self.canvas.show()
            self.canvas.set_size_request(600, 400)
            self.canvas.set_events(
                gtk.gdk.BUTTON_PRESS_MASK      |
                gtk.gdk.KEY_PRESS_MASK      |
                gtk.gdk.KEY_RELEASE_MASK
                )
            self.canvas.set_flags(gtk.HAS_FOCUS|gtk.CAN_FOCUS)
            self.canvas.grab_focus()
    
            def keypress(widget, event):
                print('key press')
            def buttonpress(widget, event):
                print('button press')
    
            self.canvas.connect('key_press_event', keypress)
            self.canvas.connect('button_press_event', buttonpress)
    
            def onselect(xmin, xmax):
                print(xmin, xmax)
    
            span = SpanSelector(self.axis, onselect, 'horizontal', useblit=False,
                                rectprops=dict(alpha=0.5, facecolor='red') )
    
    
            self['vboxMain'].pack_start(self.canvas, True, True)
            self['vboxMain'].show()
    
            # below is optional if you want the navigation toolbar
            self.navToolbar = NavigationToolbar(self.canvas, self['windowMain'])
            self.navToolbar.lastDir = '/var/tmp/'
            self['vboxMain'].pack_start(self.navToolbar)
            self.navToolbar.show()
    
            sep = gtk.HSeparator()
            sep.show()
            self['vboxMain'].pack_start(sep, True, True)
    
    
            self['vboxMain'].reorder_child(self['buttonClickMe'],-1)
    
    
    
    
    
        def __getitem__(self, key):
            return self.widgets.get_widget(key)
    
    widgets = WidgetsWrapper()
    gtk.main()
    

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