[pygame] PGU Updateable Text Class

[Kris Schnee <kschnee@xxxxxxxxxx>]

Hi. I'm trying to build a widget using PGU that will allow me to display 
a large block of text, and change that text during the program in 
response to strings sent from elsewhere in the program. How do I do that?

I started with the Dialog class, and said:

class TextDisplay(gui.Dialog):
    def __init__(self,**params):
        self.title = gui.Label( params.get("title","Untitled") )
        self.space = self.title.style.font.size(" ")
        self.textblock = gui.Document(width=400)
        self.AddText("This is a journey into sound.")
        gui.Dialog.__init__(self,self.title,self.textblock)

    def AddText(self,text="Foo?"):
        print "Calling AddText."
        self.textblock.block(align=-1)
        for word in text.split():
            self.textblock.add(gui.Label(word))
            self.textblock.space(self.space)
        self.textblock.br( self.space[1] )

app = gui.Desktop()
app.connect(gui.QUIT,app.quit,None)

c = gui.Table(width=640,height=480)
c.tr()

t = TextDisplay()
t.connect(gui.CLICK,t.AddText,"Foobar")
c.td(t)

app.run(c)

pygame.display.quit()


Result: The widget comes up with the default text (printing out "Calling 
AddText" in the console), but clicking on the widget's upper-right 
button prints "Calling AddText" without any other visible effect. What 
am I doing wrong? Is there a better way to do this?

By the way, it's helpful to call pygame.display.quit() at the end of the 
demo programs, so that the graphics window closes for users trying the 
program in IDLE.

Thanks for any help.

Kris