From: Martin Traverso <martin@...>
Date: 2005-02-06T03:10:36+09:00
Subject: Korundum: error when overriding a KDE::RootPixmap method

Hi,

I'm experimenting a bit with Korundum, but I'm having some problems. I have 
the following code:

require 'Korundum'

app = Qt::Application.new([])
widget = Qt::Widget.new
pixmap = KDE::RootPixmap.new(widget)

class << pixmap
        def updateBackground(x)
                puts "update background"
        end
end

pixmap.start

widget.show
app.setMainWidget(widget)
app.exec

When I run it I get this error:

ArgumentError: Cannot handle 'KSharedPixmap*' as argument of virtual method 
KRootPixmap::updateBackground
        from /usr/local/lib/ruby/site_ruby/1.8/Qt/qtruby.rb:128:in 
`method_missing'
        from /usr/local/lib/ruby/site_ruby/1.8/Qt/qtruby.rb:128:in `qt_invoke'
        from /usr/local/lib/ruby/site_ruby/1.8/Qt/qtruby.rb:128:in 
`method_missing'
        from /usr/local/lib/ruby/site_ruby/1.8/Qt/qtruby.rb:128:in `exec'

If I remove the class << pixmap ... end section the program runs ok (but does 
not do what I want, of course). Any idea of what the error means in this 
context? What am I doing wrong?

Thanks for your help.

Martin