mirror of
https://github.com/Apress/foundations-of-pygtk-development.git
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112 lines
4.2 KiB
Python
112 lines
4.2 KiB
Python
#!/usr/bin/python3
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import sys
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import gi
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gi.require_version('Gtk', '3.0')
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from gi.repository import Gtk, Gdk
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class AppMenuItem(Gtk.MenuItem):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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def __setattr__(self, name, value):
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self.__dict__[name] = value
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def __getattr__(self, name):
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return self.__dict__[name]
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class AppWindow(Gtk.ApplicationWindow):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.set_border_width(10)
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self.set_size_request(250, -1)
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# Create all of the necessary widgets and initialize the pop-up menu.
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menu = Gtk.Menu.new()
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eventbox = Gtk.EventBox.new()
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progress = Gtk.ProgressBar.new()
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progress.set_text("Nothing Yet Happened")
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progress.set_show_text(True)
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statusbar = Gtk.Statusbar.new()
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self.create_popup_menu(menu, progress, statusbar)
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progress.set_pulse_step(0.05)
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eventbox.set_above_child(False)
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eventbox.connect("button_press_event", self.button_press_event, menu)
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eventbox.add(progress)
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vbox = Gtk.Box.new(orientation=Gtk.Orientation.VERTICAL, spacing=0)
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vbox.pack_start(eventbox, False, True, 0)
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vbox.pack_start(statusbar, False, True, 0)
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self.add(vbox)
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eventbox.set_events(Gdk.EventMask.BUTTON_PRESS_MASK)
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eventbox.realize()
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def create_popup_menu(self, menu, progress, statusbar):
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pulse = AppMenuItem(label="Pulse Progress")
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fill = AppMenuItem(label="Set as Complete")
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clear = AppMenuItem(label="Clear Progress")
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separator = Gtk.SeparatorMenuItem.new()
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pulse.connect("activate", self.pulse_activated, progress)
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fill.connect("activate", self.fill_activated, progress)
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clear.connect("activate", self.clear_activated, progress)
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# Connect signals to each menu item for status bar messages.
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pulse.connect("enter-notify-event", self.statusbar_hint, statusbar)
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pulse.connect("leave-notify-event", self.statusbar_hint, statusbar)
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fill.connect("enter-notify-event", self.statusbar_hint, statusbar)
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fill.connect("leave-notify-event", self.statusbar_hint, statusbar)
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clear.connect("enter-notify-event", self.statusbar_hint, statusbar)
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clear.connect("leave-notify-event", self.statusbar_hint, statusbar)
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pulse.__setattr__("menuhint", "Pulse the progress bar one step.")
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fill.__setattr__("menuhint", "Set the progress bar to 100%.")
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clear.__setattr__("menuhint", "Clear the progress bar to 0%.")
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menu.append(pulse)
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menu.append(separator)
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menu.append(fill)
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menu.append(clear)
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menu.attach_to_widget(progress, None)
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menu.show_all()
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def button_press_event(self, eventbox, event, menu):
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if event.button == 3 and event.type == Gdk.EventType.BUTTON_PRESS:
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menu.popup(None, None, None, None, event.button, event.time)
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return True
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return False
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def pulse_activated(self, item, progress):
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progress.pulse()
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progress.set_text("Pulse!")
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def fill_activated(self, item, progress):
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progress.set_fraction(1.0)
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progress.set_text("One Hundred Percent")
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def clear_activated(self, item, progress):
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progress.set_fraction(0.0)
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progress.set_text("Reset to Zero")
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def statusbar_hint(self, menuitem, event, statusbar):
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id = statusbar.get_context_id("MenuItemHints")
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if event.type == Gdk.EventType.ENTER_NOTIFY:
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hint = menuitem.__getattr__("menuhint")
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id = statusbar.push(id, hint)
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elif event.type == Gdk.EventType.LEAVE_NOTIFY:
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statusbar.pop(id)
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return False
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class Application(Gtk.Application):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, application_id="org.example.myapp",
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**kwargs)
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self.window = None
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def do_activate(self):
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if not self.window:
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self.window = AppWindow(application=self,
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title="Pop-up Menus")
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self.window.show_all()
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self.window.present()
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if __name__ == "__main__":
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app = Application()
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app.run(sys.argv)
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