I made this short example of a Gtk.Switch working in assembly with a setting writing a single line of code instead of several lines to bind the properties of the widget creating callbacks (value_changed binding is also included). As Gnome states, “Gsettings let’s you bind object properties directly to settings” and “it uses the default Gio mapping functions to map between the settings and property values”.
Although it’s a very short and basic PyGI example, I thought it was a good idea to post it since it might be useful to someone else being this Gsettings feature documented in C and not in Python yet.
The script creates a Gtk Switch and its label both packed into the Window. The property of Gtk.Switch is “active”, same as Gtk.CheckButton (boolean). The setting I picked up for this example is the one that lets the file manager show the icons on the desktop (Not sure if the best one, but you can experiment with the one you prefer); schema “org.gnome.desktop.background”, key “show-desktop-icons”, and in python you can set GSettingsBindFlags with Gio.SettingsBindFlags. Example: G_SETTINGS_BIND_DEFAULT is Gio.SettingsBindFlags.DEFAULT .
If you change the same setting from your terminal or Dconf-Editor while the script is running, you will see how the change will be set in the switch as well.
#! /usr/bin/python from gi.repository import Gtk, Gio class Example(Gtk.Window): def __init__(self): # Setup the window with title and border width. Gtk.Window.__init__(self, type=Gtk.WindowType.TOPLEVEL, title="Gsettings Switch Example", resizable=False, border_width=10) # Create and bind the Gtk Switch with the gsettings schema and its key. switch = Gtk.Switch() setting = Gio.Settings.new("org.gnome.desktop.background") setting.bind("show-desktop-icons", switch, "active", Gio.SettingsBindFlags.DEFAULT) # Create the label for the switch label = Gtk.Label("Show Icons on the Desktop") # Position the Switch and its Label inside a Horizontal child box. box = Gtk.Box.new(Gtk.Orientation.HORIZONTAL, 40) box.pack_start(label, False, False, 10) box.pack_end(switch, False, False, 10) # Add the child box to the window self.add(box) self.connect("destroy", Gtk.main_quit) self.show_all() Gtk.main() if __name__ == "__main__": Example()
This is just an easy, quick and short way to create Application Launchers (.desktop files) in GNOME using a pre-installed text editor in most UNIX and Linux systems called Pico.
Step 1: Create the file in your preferred directory (Mine is my home folder) then hit Enter.
Step2: Edit the file.
As you can see in the screenshot, the format is very short and simple. In the head of the file you have to type [Desktop Entry] followed by four parameters: The first for your type of file which is Application, the second is the name for your launcher, the third is the name (If is a bin file) or path to your executable file, and the fourth is the icon which also can be set with its name if you are going to use one from the system. Hit ctrl-x, then ‘y’ to save the file.
Step 3: Make the file executable using chmod +x
A small Python Script I use on my VM with GNOME-2 since it’s sometimes annoying to delete one of the Panels by accident. In GNOME 2 you can lock/unlock this panels by editing a GConf schema so you can prevent wrong selections whenever you right click to customize this widgets.
The script pops up a Gtk Message Dialog so I can be asked if I want to make the changes first. In my case, I made an executable icon (.desktop file) for this script and placed it into the bottom panel so it can be easily accessed.
You can also modify this script very easy if you want to try it with a different Gconf Setting by replacing the global variable for the schema and/or the string values.
#! /usr/bin/python import gtk, gconf KEY = "/apps/panel/global/locked_down" class Switcher(gtk.MessageDialog): def __init__(self): client = gconf.client_get_default() value = not ( client.get_bool(KEY) ) state = "lock down" if value else "unlock" gtk.MessageDialog.__init__(self, None, 0, gtk.MESSAGE_QUESTION, gtk.BUTTONS_YES_NO, "Gnome Panels Lock") self.format_secondary_text( "Are you sure you want to %s Gnome Panels?" % state) if self.run() == gtk.RESPONSE_YES: client.set_bool(KEY, value) self.destroy() if __name__ == "__main__": Switcher()
An update to the small desktop tool for Unity 2D to work with Ubuntu 12.04 LTS Precise Pangolin.
-> Dash and Icon right click Shortcuts (QuickLists) for launcher settings and compositing manager’s extra effects, which brings window edge shadows and “alt-tab thumbnail previews” very handy for multi-tasking.
-> Updated Gtk3 GUI: Few available options to tweak Unity 2D not included in ‘System Settings’ for Launcher and Dash, Applications Lenses and a checkbox to enable OpenGL for Graphics Rendering as long as your system has a supported graphics card. If so, you might not be able to see any differences in your desktop regarding its visual components but just an overall graphics performance improvement.
Note: The Compositing Manager checkbox available in previous versions of the GUI has been removed. The switcher shortcut in the dash or quicklist in the icon handles this features and brings a pop up message dialog which helps to refresh the desktop so window shadows are instantly enabled.
This is an update to the small tool I made for Unity 2D to save time tweaking its settings from the terminal or dconf-editor :)
An updated Version for 12.04 LTS can be found in this post
-> Icon right click Shortcuts (QuickLists) for launcher settings and compositing manager’s extra effects, which brings window edge shadows and alt-tab thumbnail previews, very handy for multi-tasking.
The same shortcuts can be found by typing in the dash.
-> An updated (From PyGtk) Gtk+3 GUI with the two available Unity-2D preferences [for dash and launcher] and a few extras.
Notes: If you click the compositing manager checkbox instead of a shortcut, you have to click elsewhere in your desktop or window since shadows don’t take effect by just enabling them. (The message dialog launched when you use the shortcuts solves that issue :))
The ‘Always Show’ option for the launcher is tricky to set when it’s hidden (A native bug in Unity-2D caused by the ‘use-strut’ gsettings key), you can use “Super” or “Alt+F2″ keyboard shortcuts to bring the launcher back in position.
This is a very simple configuration tool I made to save time browsing folders and adding values in Gconf, or writing commands in the terminal to customize certain aspects of the new Unity-2D Desktop.
There’s not much to tweak under the current version of Unity-2D. However, there are certain times -Specially while I’m running Ubuntu on a VM- that I want to set the Launcher to be hidden or vice versa, and Compositing Manager makes it look way better (Near regular Unity) adding window edge shadows, transparency in the Dash and Alt-Tab Switching thumbnail previews.
Notes: If you click the compositing manager checkbox, hit “Alt+Tab” to refresh your desktop since by enabled-disabled you get a black screen.
The ‘Always Show’ option for the launcher is tricky to set when it’s hidden (A native bug in Unity-2D caused by the ‘use-strut’ gconf key), you can use “Super” or “Alt+F2″ keyboard shortcuts to bring the launcher back in position.
Its source code:
#! /usr/bin/python # 2D-Desktop Settings 1.0-5 # Small desktop configuration tool for Unity-2D (11.04) # # Copyright 2011-2012 by Mariano Chavero # # Distributed under de GNU/GPL V3 # Visit <http://www.gnu.org/licenses/> for more information. import gtk, gconf class Settings(gtk.Window): def label(self, text): box = gtk.HBox() lbl = gtk.Label(text) lbl.set_use_markup(True) lbl.set_alignment(0, 0.3) box.pack_start(lbl, False, False, 25) return box def Checkbox(self, text, key): client = gconf.client_get_default() box = gtk.HBox() bttn = gtk.CheckButton(text) bttn.set_active(client.get_bool(key)) bttn.connect("toggled", self.on_Checkbox_toggled, client, key) box.pack_start(bttn, False, False, 50) return box def RadioButton(self, text, key, val, group): client = gconf.client_get_default() box = gtk.HBox() bttn = gtk.RadioButton(group, text) bttn.set_active(client.get_int(key) is val) bttn.connect("toggled", self.on_RadioButton_toggled, client, key, val) box.pack_start(bttn, False, False, 50) return box def on_Checkbox_toggled(self, widget, client, key): client.set_bool(key, widget.get_active()) def on_RadioButton_toggled(self, widget, client, key, val): if not widget.get_active(): return client.set_int(key, val) # A desktop strut value is set, required by the Unity 2D Launcher client.set_bool("/desktop/unity-2d/launcher/use_strut", not bool(val)) def Separator(self): return gtk.HSeparator() # Loads the system theme icon of your choice :) def theme_load(self, icon_name): t = gtk.icon_theme_get_default() return t.load_icon(icon_name, 48, 0) def __init__(self): gtk.Window.__init__(self, type=gtk.WINDOW_TOPLEVEL) self.set_resizable(False) self.set_border_width(10) self.set_title("2D-Desktop Settings") self.set_position(gtk.WIN_POS_CENTER) self.set_icon(self.theme_load("gnome-fs-desktop")) self.connect("destroy", lambda q: gtk.main_quit()) # Creates one group for our existant Radio Buttons rbttngroup = gtk.RadioButton(None) ### Layout ### Container = gtk.VButtonBox() Container.add(self.label("<b>Launcher Behaviour</b>")) Container.add(self.RadioButton("IntelliHide (Dodge with Windows)", "/desktop/unity-2d/launcher/hide_mode", 2, rbttngroup)) Container.add(self.RadioButton("Auto Hide", "/desktop/unity-2d/launcher/hide_mode", 1, rbttngroup)) Container.add(self.RadioButton("Always Show", "/desktop/unity-2d/launcher/hide_mode", 0, rbttngroup)) Container.add(self.Separator()) Container.add(self.label("<b>Unity 2D Dash</b>")) Container.add(self.Checkbox("Show Dash using the Super Key (Windows Logo)", "/desktop/unity-2d/launcher/super_key_enable")) Container.add(self.Separator()) Container.add(self.label("<b>Desktop</b>")) Container.add(self.Checkbox("Enable Window Shadows and Transparency", "/apps/metacity/general/compositing_manager")) Container.add(self.Checkbox("Show Volumes and Devices", "/apps/nautilus/desktop/volumes_visible")) box = gtk.VBox() box.add(Container) self.add(box) self.show_all() gtk.main() if __name__ == "__main__": Settings()