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A simple solution like HTML widgets and a transparent Webkit window would be ideal.

I'm trying to make a simple background widget framework such that I can easily customize my desktop with some CSS widgets and not worry about the separate undecorated windows getting moved around like with screenlets on setsid unity.

Something like this but with pygi is what I'm looking to find.

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1 Answer 1

up vote 6 down vote accepted

Here's some working code for a transparent WebKit window.

from gi.repository import WebKit, Gtk, Gdk
import signal

class BackgroundPaneCallbacks:
    pass

class BackgroundPaneWebview(WebKit.WebView):
    def __init__(self):
        WebKit.WebView.__init__(self)
        self.set_transparent(True)
        self.override_background_color(Gtk.StateFlags.NORMAL, Gdk.RGBA(0,0,0,0))
        self.load_html_string('<HTML>'+\
                              '<STYLE type="text/css">'+\
                              'BODY { background: rgba(0,0,0,0);}'+\
                              '</STYLE>'+\
                              '<BODY>'+\
                              'Hello World'+\
                              '</BODY>'+\
                              '</HTML>',
                              'file:///')
        print("Webview loaded")

class BackgroundPaneWin(Gtk.Window):
    def __init__(self, address="127.0.0.1", port=54541):
        Gtk.Window.__init__(self)

        #Set transparency
        screen = self.get_screen()
        rgba = screen.get_rgba_visual()
        self.set_visual(rgba)
        self.override_background_color(Gtk.StateFlags.NORMAL, Gdk.RGBA(0,0,0,0))

        #Add all the parts
        self.view = BackgroundPaneWebview()
        box = Gtk.Box()
        self.add(box)
        box.pack_start(self.view, True, True, 0)
        self.set_decorated(False)
        self.connect("destroy", lambda q: Gtk.main_quit())
        #Configure   

        #Show all the parts
        self.show_all()


        print("Win loaded")

class BackgroundPane:
    def __init__(self, params=False):
        #Add all the parts
        self.root = params['root']
        self.win = BackgroundPaneWin()
        print("Pane loaded")

    def init(self):
        pass

    def add_widget(self, widget):
        pass

class Logger:
    def __init__(self, root):
        self.root = root
        self.log("Logger loaded")

    def log(self, msg, level='console'):
        if level=='console':
            print msg

class Handlers:
    pass

class App:
    def __init__(self, params={}):
        #Get screen geometry
        s = Gdk.Screen.get_default()
        params['w'] = s.get_width()
        params['h'] = s.get_height()

        #Store params
        self.params = params
        self.log = Logger(self).log
        self.handlers = Handlers()
        #Get all components
        bg = BackgroundPane({'root':self,
                                           })
        #Store all components
        self.components = {}
        self.components['bg'] = bg

        #Make sure everything is started

        #Make sure Ctl-C works
        signal.signal(signal.SIGINT, signal.SIG_DFL)

    def run(self):
        Gtk.main()

if __name__ == '__main__':
    print("Loading app...")
    app = App()
    app.run()
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This is nice, but if you want the widget to ignore the "Show Desktop" Plugin, see the answer here: askubuntu.com/questions/258829/… –  Ian B. Feb 25 '13 at 14:14

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