Esempio GUI con PyGTK/Glade

In questa versione dell'esempio di GUI l'interfaccia non e' stata creata da codice bensi' mediante il GUI Designer di GTK ovvero Glade

Per iniziare a creare l'interfaccia deve essere prima aggiunto una form (ovvero un TopLevel) a cui deve essere aggiunta una Box (in questo caso un VBox) per impacchettare i Widgets e successivamente si aggiungono i Widgets
Il nome della finestra di TopLevel e' stato definito come MainWindow (nome che servira' per la referenziazione)

In Properties/Signal si puo' definire l'evento che si vuole catturare

Il salvataggio dell'interfaccia puo' avvenire in due formati (GtkBuilder e Libglade). Nell'esempio riportato di seguito e' stato scelto LibGlade

Il programma in Python...il codice e' abbastanza autoesplicativo
---------------------------------------------------
 import sys
try:
    import pygtk
    pygtk.require("2.0")
except:
    pass
try:
    import gtk
    import gtk.glade
except:
    sys.exit(1)


class ProgressBar:

    def __init__(self):

      
        self.gladefile = "progressbar.glade"
        self.wTree = gtk.glade.XML(self.gladefile)
        self.window = self.wTree.get_widget("MainWindow")
        self.window.show()
        if (self.window):
            self.window.connect("destroy", gtk.main_quit)

        dic = { "on_hscale1_value_changed" : self.cambia_valore}
        self.wTree.signal_autoconnect(dic)
      
    def cambia_valore(self, widget):
        a = self.wTree.get_widget("hscale1").get_value()
        self.wTree.get_widget("label1").set_text(str(int(a)))
        self.wTree.get_widget("progressbar1").set_fraction(a/100)


      
if __name__ == "__main__":
    hwg = ProgressBar()
    gtk.main()
---------------------------------------------------
progressbar.glade
---------------------------------------------------
 <?xml version="1.0" encoding="UTF-8"?>
<glade-interface>
  <!-- interface-requires gtk+ 2.24 -->
  <!-- interface-naming-policy project-wide -->
  <widget class="GtkWindow" id="MainWindow">
    <property name="can_focus">False</property>
    <property name="title" translatable="yes">Progress Bar</property>
    <property name="default_width">250</property>
    <property name="default_height">80</property>
    <child>
      <widget class="GtkVBox" id="vbox1">
        <property name="visible">True</property>
        <property name="can_focus">False</property>
        <child>
          <widget class="GtkHScale" id="hscale1">
            <property name="visible">True</property>
            <property name="can_focus">True</property>
            <property name="adjustment">0 0 110 1 1 10</property>
            <property name="lower_stepper_sensitivity">off</property>
            <property name="upper_stepper_sensitivity">off</property>
            <property name="restrict_to_fill_level">False</property>
            <property name="round_digits">1</property>
            <property name="digits">0</property>
            <property name="draw_value">False</property>
            <signal name="change_value" handler="on_hscale1_change_value" swapped="no"/>
            <signal name="value_changed" handler="on_hscale1_value_changed" swapped="no"/>
          </widget>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">0</property>
          </packing>
        </child>
        <child>
          <widget class="GtkLabel" id="label1">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
            <property name="label" translatable="yes">0</property>
          </widget>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">1</property>
          </packing>
        </child>
        <child>
          <widget class="GtkProgressBar" id="progressbar1">
            <property name="visible">True</property>
            <property name="can_focus">False</property>
          </widget>
          <packing>
            <property name="expand">True</property>
            <property name="fill">True</property>
            <property name="position">2</property>
          </packing>
        </child>
      </widget>
    </child>
  </widget>
</glade-interface>
---------------------------------------------------

Esempio GUI con PYGtk

Al contrario degli esempio precedenti PyGtk non funziona con la versione 3.x di Python per cui e' necessario usare un compilatore della serie 2.x

----------------------------------------------
import pygtk
pygtk.require('2.0')
import gtk

class SecondWin:
        def __init__(self):
            self.win = gtk.Window(gtk.WINDOW_TOPLEVEL)
            self.win.connect("delete_event", self.delete_event)
            self.win.connect("destroy", self.destroy)
            #self.win.set_resizable(gtk.FALSE)
            self.win.set_title('Progress Bar')
            self.win.set_border_width(5)
            self.win.resize(200,100)

            self.vbox = gtk.VBox()
            self.win.add(self.vbox)

            adjustment = gtk.Adjustment(0, 0, 100, 5, 10, 0)
            self.hscale = gtk.HScale(adjustment)
            self.vbox.pack_start(self.hscale)
            self.hscale.set_digits(0)
            self.hscale.connect("value-changed", self.scale_moved)

            self.label = gtk.Label(str="   ")
            self.vbox.pack_start(self.label)

            self.progressbar = gtk.ProgressBar()
            self.vbox.pack_start(self.progressbar)
           
            self.win.show_all()

        def scale_moved(self, event):
            self.label.set_text(str(self.hscale.get_value()))
            self.progressbar.set_fraction(self.hscale.get_value()/100)
           
        def delete_event(self, widget, event, data=None):
            return gtk.FALSE
        def destroy(self, widget, data=None):
            return gtk.main_quit()
        def main(self):
            gtk.main()

if __name__ == "__main__":
    second = SecondWin()
    second.main()
----------------------------------------------