PyGobject（八十六）Gtk.Application

GtkApplication
Actions

Menus

Command Line

Methods

Virtual Methods

Properties

Signals

例子
一

二

Gtk.Application

Gtk.Application是在gtk+3.0才引入的一个新类，它包含许多现代的应用需求，如处理多个实例，D-Bus的激活，打开文件，在命令行解析命令，开机/关机，菜单管理，窗口管理等等

虽然Gtk.Application能够和普通Gtk.Windows一起正常的工作，不过通常建议与Gtk.ApplicationWindow一起使用。

Actions

Gio.Action表示应用程序或部件的一个任务，通常有一个名字来标识这个任务。可以在运行时启用或者禁用Gio.Action，它们可以被激活或这改变状态（如果它们包含状态）。

使用Actions的原因是为了将UI界面和业务逻辑进行分离。通常我们使用Gio.Action的子类Gio.SimpleAction来定义一个Action

很多类，如Gio.MenuItem和Gtk.ModelButton支持在属性中设置Action名称。

这些Action可以一起分组到Gio.ActionGroup并使用Gtk.Widget.insert_action_group（name, group)）将其添加到一个Widget中。这个name就是前缀。当添加到Gtk.ApplicationWindow中时这个前缀就是“win”。当你引用Action时，需要使用完整的Action名称，如“app.about”。

你也可以很容易通过设置Gio.Menu文件中的“accel”属性或使用Gtk.Application.add_accelerator方法做出Action和按键绑定。

Menus

通常我们使用XML文件来定义菜单，并引用前面提到的Action。 Gtk.Application使用Gtk.Application.set_app_menu（）或Gtk.Application.set_menubar（）方法来设置菜单。

Command Line

创建Gtk.Application需要Gio.ApplicationFlags参数。使用这个你可以让它处理它自身的所有行为，还可以处理更多的自定义行为。

您可以使用HANDLES_COMMAND_LINE允许在Gio.Application.do_command_line方法中获取给定的命令并自定它要执行的事务。使用Gio.Application.add_main_option（）方法将命令添加到命令行中。

使用HANDLES_OPEN会在Gio.Application.do_open（）方法打开你参数列表中所给的文件

如果你的应用程序已经打开这些都将被发送到现有实例，除非你用NON_UNIQUE允许多个实例。

Methods

方法修饰词	方法名及参数
static	new (application_id, flags)
	add_accelerator (accelerator, action_name, parameter)
	add_window (window)
	get_accels_for_action (detailed_action_name)
	get_actions_for_accel (accel)
	get_active_window ()
	get_app_menu ()
	get_menu_by_id (id)
	get_menubar ()
	get_window_by_id (id)
	get_windows ()
	inhibit (window, flags, reason)
	is_inhibited (flags)
	list_action_descriptions ()
	prefers_app_menu ()
	remove_accelerator (action_name, parameter)
	remove_window (window)
	set_accels_for_action (detailed_action_name, accels)
	set_app_menu (app_menu)
	set_menubar (menubar)
	uninhibit (cookie)

Virtual Methods

do_window_added (window)
do_window_removed (window)

Properties

Name	Type	Flags	Short Description
active-window	Gtk.Window	r	The window which most recently had focus
app-menu	Gio.MenuModel	r/w	The Gio.MenuModel for the application menu
menubar	Gio.MenuModel	r/w	The Gio.MenuModel for the menubar
register-session	bool	r/w	Register with the session manager

Signals

Name	Short Description
window-added	Emitted when a Gtk.Window is added to application through Gtk.Application.add_window().
window-removed	Emitted when a Gtk.Window is removed from application, either as a side-effect of being destroyed or explicitly through Gtk.Application.remove_window().

例子

一

代码：

#!/usr/bin/env python3
# Created by xiaosanyu at 16/6/16
# section 134
TITLE = "Application"
DESCRIPTION = """
Gtk.Application is a class that handles many important aspects of a
GTK+ application in a convenient fashion, without enforcing a
one-size-fits-all application model

While Gtk.Application works fine with plain Gtk.Windows,
it is recommended to use it together with Gtk.ApplicationWindow.
"""
import sys

import gi

gi.require_version('Gtk', '3.0')
from gi.repository import GLib, Gio, Gtk, GdkPixbuf
import os

# This would typically be its own file
MENU_XML = """
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<menu id="app-menu">
<section>
<attribute name="label" translatable="yes">Change label</attribute>
<item>
<attribute name="action">win.change_label</attribute>
<attribute name="target">String 1</attribute>
<attribute name="label" translatable="yes">String 1</attribute>
</item>
<item>
<attribute name="action">win.change_label</attribute>
<attribute name="target">String 2</attribute>
<attribute name="label" translatable="yes">String 2</attribute>
</item>
<item>
<attribute name="action">win.change_label</attribute>
<attribute name="target">String 3</attribute>
<attribute name="label" translatable="yes">String 3</attribute>
</item>
</section>
<section>
<item>
<attribute name="action">win.maximize</attribute>
<attribute name="label" translatable="yes">Maximize</attribute>
</item>
</section>
<section>
<item>
<attribute name="action">app.about</attribute>
<attribute name="label" translatable="yes">_About</attribute>
</item>
<item>
<attribute name="action">app.quit</attribute>
<attribute name="label" translatable="yes">_Quit</attribute>
<attribute name="accel"><Primary>q</attribute>
</item>
</section>
</menu>
</interface>
"""

class AppWindow(Gtk.ApplicationWindow):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
# set logo
icon = GdkPixbuf.Pixbuf.new_from_file(os.path.join(os.path.dirname(__file__), "../Data/gtk-logo-rgb.gif"))
# transparent
icon = icon.add_alpha(True, 0xff, 0xff, 0xff)
self.set_default_icon(icon)
# This will be in the windows group and have the "win" prefix
max_action = Gio.SimpleAction.new_stateful("maximize", None,
GLib.Variant.new_boolean(False))
max_action.connect("change-state", self.on_maximize_toggle)
self.add_action(max_action)

# Keep it in sync with the actual state
self.connect("notify::is-maximized",
lambda obj, pspec: max_action.set_state(
GLib.Variant.new_boolean(obj.props.is_maximized)))

lbl_variant = GLib.Variant.new_string("String 1")
lbl_action = Gio.SimpleAction.new_stateful("change_label", lbl_variant.get_type(),
lbl_variant)
lbl_action.connect("change-state", self.on_change_label_state)
self.add_action(lbl_action)

self.label = Gtk.Label(label=lbl_variant.get_string(),
margin=30)
self.add(self.label)
self.label.show()

def on_change_label_state(self, action, value):
action.set_state(value)
self.label.set_text(value.get_string())

def on_maximize_toggle(self, action, value):
action.set_state(value)
if value.get_boolean():
self.maximize()
else:
self.unmaximize()

class Application(Gtk.Application):
def __init__(self, *args, **kwargs):
super().__init__(*args, application_id="org.example.myapp",
flags=Gio.ApplicationFlags.HANDLES_COMMAND_LINE,
**kwargs)
self.window = None
# 设置命令行参数
# $python3 /Applications/Project/Python/project/PYGUI/pygtk3/demos/Application/Application.py --help
self.add_main_option("test", ord("t"), GLib.OptionFlags.NONE,
GLib.OptionArg.NONE, "Command line test", None)

def do_startup(self):
Gtk.Application.do_startup(self)

action = Gio.SimpleAction.new("about", None)
action.connect("activate", self.on_about)
self.add_action(action)

action = Gio.SimpleAction.new("quit", None)
action.connect("activate", self.on_quit)
self.add_action(action)

builder = Gtk.Builder.new_from_string(MENU_XML, -1)
self.set_app_menu(builder.get_object("app-menu"))

def do_activate(self):
# We only allow a single window and raise any existing ones
if not self.window:
# Windows are associated with the application
# when the last one is closed the application shuts down
self.window = AppWindow(application=self, title="Main Window")

self.window.present()

# $python3 /Applications/Project/Python/project/PYGUI/pygtk3/demos/Application/Application.py --test
# Test argument recieved
def do_command_line(self, command_line):
options = command_line.get_options_dict()

if options.contains("test"):
# This is printed on the main instance
print("Test argument recieved")

self.activate()
return 0

def on_about(self, action, param):
about_dialog = Gtk.AboutDialog(transient_for=self.window, modal=True)
about_dialog.run()
about_dialog.destroy()

def on_quit(self, action, param):
if self.window:
self.window.destroy()
self.quit()

def main():
app = Application()
app.run(sys.argv)

if __name__ == "__main__":
main()

二

代码：

#!/usr/bin/env python3
# section 135
# -*- Mode: Python; py-indent-offset: 4 -*-
# vim: tabstop=4 shiftwidth=4 expandtab
#
# Copyright (C) 2010 Red Hat, Inc., John (J5) Palmieri <johnp@redhat.com>
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
# USA

TITLE = "Application main window"
DESCRIPTION = """
Demonstrates a typical application window with menubar, toolbar, statusbar.
"""

import webbrowser
import os
import gi

gi.require_version('Gtk', '3.0')
gi.require_version('GdkPixbuf', '2.0')
from gi.repository import GdkPixbuf, Gtk

infobar = None
window = None
messagelabel = None

def widget_destroy(widget, button):
widget.destroy()

def activate_action(action, user_data=None):
global window

name = action.get_name()
_type = type(action)
if name == 'DarkTheme':
value = action.get_active()
settings = Gtk.Settings.get_default()
settings.set_property('gtk-application-prefer-dark-theme', value)
return

dialog = Gtk.MessageDialog(message_type=Gtk.MessageType.INFO,
buttons=Gtk.ButtonsType.CLOSE,
text='You activated action: "%s" of type %s' % (name, _type))

# FIXME: this should be done in the constructor
dialog.set_transient_for(window)
dialog.connect('response', widget_destroy)
dialog.show()

def activate_radio_action(action, current, user_data=None):
global infobar
global messagelabel

name = current.get_name()
_type = type(current)
active = current.get_active()
value = current.get_current_value()
if active:
text = 'You activated radio action: "%s" of type %s.\n Current value: %d' % (name, _type, value)
messagelabel.set_text(text)
infobar.set_message_type(Gtk.MessageType(value))
infobar.show()

def update_statusbar(buffer, statusbar):
statusbar.pop(0)
count = buffer.get_char_count()

iter = buffer.get_iter_at_mark(buffer.get_insert())
row = iter.get_line()
col = iter.get_line_offset()
msg = 'Cursor at row %d column %d - %d chars in document' % (row, col, count)

statusbar.push(0, msg)

def mark_set_callback(buffer, new_location, mark, data):
update_statusbar(buffer, data)

def about_cb(widget, user_data=None):
global window

authors = ['John (J5) Palmieri',
'Tomeu Vizoso',
'and many more...']

documentors = ['David Malcolm',
'Zack Goldberg',
'and many more...']

license = """
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Library General Public License for more details.

You should have received a copy of the GNU Library General Public
License along with the Gnome Library; see the file COPYING.LIB.  If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
"""
dirname = os.path.abspath(os.path.dirname(__file__))
filename = os.path.join(dirname, '../Data', 'gtk-logo-rgb.gif')
pixbuf = GdkPixbuf.Pixbuf.new_from_file(filename)
transparent = pixbuf.add_alpha(True, 0xff, 0xff, 0xff)

about = Gtk.AboutDialog(parent=window,
program_name='GTK+ Code Demos',
version='0.1',
copyright='(C) 2010 The PyGI Team',
license=license,
website='http://live.gnome.org/PyGI',
comments='Program to demonstrate PyGI functions.',
authors=authors,
documenters=documentors,
logo=transparent,
title='About GTK+ Code Demos')
about.connect("activate-link", click_link)
about.connect('response', widget_destroy)
about.show()

def click_link(widget, url):
webbrowser.open(url)
return True

action_entries = (
("FileMenu", None, "_File"),  # name, stock id, label
("OpenMenu", None, "_Open"),  # name, stock id, label
("PreferencesMenu", None, "_Preferences"),  # name, stock id, label
("ColorMenu", None, "_Color"),  # name, stock id, label
("ShapeMenu", None, "_Shape"),  # name, stock id, label
("HelpMenu", None, "_Help"),  # name, stock id, label
("New", Gtk.STOCK_NEW,  # name, stock id
"_New", "<control>N",  # label, accelerator
"Create a new file",  # tooltip
activate_action),
("File1", None,  # name, stock id
"File1", None,  # label, accelerator
"Open first file",  # tooltip
activate_action),
("Save", Gtk.STOCK_SAVE,  # name, stock id
"_Save", "<control>S",  # label, accelerator
"Save current file",  # tooltip
activate_action),
("SaveAs", Gtk.STOCK_SAVE,  # name, stock id
"Save _As...", None,  # label, accelerator
"Save to a file",  # tooltip
activate_action),
("Quit", Gtk.STOCK_QUIT,  # name, stock id
"_Quit", "<control>Q",  # label, accelerator
"Quit",  # tooltip
activate_action),
("About", None,  # name, stock id
"_About", "<control>A",  # label, accelerator
"About",  # tooltip
about_cb),
("Logo", "demo-gtk-logo",  # name, stock id
None, None,  # label, accelerator
"GTK+",  # tooltip
activate_action),
)

toggle_action_entries = (
("Bold", Gtk.STOCK_BOLD,  # name, stock id
"_Bold", "<control>B",  # label, accelerator
"Bold",  # tooltip
activate_action,
True),  # is_active
("DarkTheme", None,  # name, stock id
"_Prefer Dark Theme", None,  # label, accelerator
"Prefer Dark Theme",  # tooltip
activate_action,
False),  # is_active
)

(COLOR_RED,
COLOR_GREEN,
COLOR_BLUE) = range(3)

color_action_entries = (
("Red", None,  # name, stock id
"_Red", "<control>R",  # label, accelerator
"Blood", COLOR_RED),  # tooltip, value
("Green", None,  # name, stock id
"_Green", "<control>G",  # label, accelerator
"Grass", COLOR_GREEN),  # tooltip, value
("Blue", None,  # name, stock id
"_Blue", "<control>B",  # label, accelerator
"Sky", COLOR_BLUE),  # tooltip, value
)

(SHAPE_SQUARE,
SHAPE_RECTANGLE,
SHAPE_OVAL) = range(3)

shape_action_entries = (
("Square", None,  # name, stock id
"_Square", "<control>S",  # label, accelerator
"Square", SHAPE_SQUARE),  # tooltip, value
("Rectangle", None,  # name, stock id
"_Rectangle", "<control>R",  # label, accelerator
"Rectangle", SHAPE_RECTANGLE),  # tooltip, value
("Oval", None,  # name, stock id
"_Oval", "<control>O",  # label, accelerator
"Egg", SHAPE_OVAL),  # tooltip, value
)

ui_info = """
<ui>
<menubar name='MenuBar'>
<menu action='FileMenu'>
<menuitem action='New'/>
<menuitem action='Open'/>
<menuitem action='Save'/>
<menuitem action='SaveAs'/>
<separator/>
<menuitem action='Quit'/>
</menu>
<menu action='PreferencesMenu'>
<menuitem action='DarkTheme'/>
<menu action='ColorMenu'>
<menuitem action='Red'/>
<menuitem action='Green'/>
<menuitem action='Blue'/>
</menu>
<menu action='ShapeMenu'>
<menuitem action='Square'/>
<menuitem action='Rectangle'/>
<menuitem action='Oval'/>
</menu>
<menuitem action='Bold'/>
</menu>
<menu action='HelpMenu'>
<menuitem action='About'/>
</menu>
</menubar>
<toolbar name='ToolBar'>
<toolitem action='Open'>
<menu action='OpenMenu'>
<menuitem action='File1'/>
</menu>
</toolitem>
<toolitem action='Quit'/>
<separator action='Sep1'/>
<toolitem action='Logo'/>
</toolbar>
</ui>
"""

def _quit(*args):
Gtk.main_quit()

def register_stock_icons():
"""
This function registers our custom toolbar icons, so they can be themed.
It's totally optional to do this, you could just manually insert icons
and have them not be themeable, especially if you never expect people
to theme your app.
"""
'''
item = Gtk.StockItem()
item.stock_id = 'demo-gtk-logo'
item.label = '_GTK!'
item.modifier = 0
item.keyval = 0
item.translation_domain = None

Gtk.stock_add(item, 1)
'''

factory = Gtk.IconFactory()
factory.add_default()

filename = os.path.join(os.path.dirname(__file__), '../Data', 'gtk-logo-rgb.gif')

pixbuf = GdkPixbuf.Pixbuf.new_from_file(filename)
transparent = pixbuf.add_alpha(True, 0xff, 0xff, 0xff)
icon_set = Gtk.IconSet.new_from_pixbuf(transparent)

factory.add('demo-gtk-logo', icon_set)

class ToolMenuAction(Gtk.Action):
__gtype_name__ = "GtkToolMenuAction"

def do_create_tool_item(self):
return Gtk.MenuToolButton()

def main():
global infobar
global window
global messagelabel

register_stock_icons()

window = Gtk.Window()
window.set_title('Application Window')
window.set_icon_name('gtk-open')
window.connect_after('destroy', _quit)
table = Gtk.Table(n_rows=1,
n_columns=5,
homogeneous=False)
window.add(table)

action_group = Gtk.ActionGroup(name='AppWindowActions')
open_action = ToolMenuAction(name='Open',
stock_id=Gtk.STOCK_OPEN,
label='_Open',
tooltip='Open a file')

action_group.add_action(open_action)
action_group.add_actions(action_entries)
action_group.add_toggle_actions(toggle_action_entries)
action_group.add_radio_actions(color_action_entries,
COLOR_RED,
activate_radio_action)
action_group.add_radio_actions(shape_action_entries,
SHAPE_SQUARE,
activate_radio_action)

merge = Gtk.UIManager()
merge.insert_action_group(action_group, 0)
window.add_accel_group(merge.get_accel_group())

merge.add_ui_from_string(ui_info)

bar = merge.get_widget('/MenuBar')
bar.show()
table.attach(bar, 0, 1, 0, 1,
Gtk.AttachOptions.EXPAND | Gtk.AttachOptions.FILL,
0, 0, 0)

bar = merge.get_widget('/ToolBar')
bar.show()
table.attach(bar, 0, 1, 1, 2,
Gtk.AttachOptions.EXPAND | Gtk.AttachOptions.FILL,
0, 0, 0)

infobar = Gtk.InfoBar()
infobar.set_no_show_all(True)
messagelabel = Gtk.Label()
messagelabel.show()
infobar.get_content_area().pack_start(messagelabel, True, True, 0)
infobar.add_button(Gtk.STOCK_OK, Gtk.ResponseType.OK)
infobar.connect('response', lambda a, b: Gtk.Widget.hide(a))

table.attach(infobar, 0, 1, 2, 3,
Gtk.AttachOptions.EXPAND | Gtk.AttachOptions.FILL,
0, 0, 0)

sw = Gtk.ScrolledWindow(hadjustment=None,
vadjustment=None)
sw.set_shadow_type(Gtk.ShadowType.IN)
table.attach(sw, 0, 1, 3, 4,
Gtk.AttachOptions.EXPAND | Gtk.AttachOptions.FILL,
Gtk.AttachOptions.EXPAND | Gtk.AttachOptions.FILL,
0, 0)

contents = Gtk.TextView()
contents.grab_focus()
sw.add(contents)

# Create statusbar
statusbar = Gtk.Statusbar()
table.attach(statusbar, 0, 1, 4, 5,
Gtk.AttachOptions.EXPAND | Gtk.AttachOptions.FILL,
0, 0, 0)

# show text widget info in the statusbar
buffer = contents.get_buffer()
buffer.connect('changed', update_statusbar, statusbar)
buffer.connect('mark_set', mark_set_callback, statusbar)

update_statusbar(buffer, statusbar)

window.set_default_size(200, 200)
window.show_all()
Gtk.main()

if __name__ == '__main__':
main()

代码下载地址：http://download.csdn.net/detail/a87b01c14/9594728