From: Stefano Crocco <stefano.crocco@...>
Date: 2009-01-14T18:02:45+09:00
Subject: Re: Using qui rather than rbuic for qtdesigner .ui files

Alle mercoledì 14 gennaio 2009, David Brunell ha scritto:
> I'm trying to load .ui files at runtime using the qui extension and
> WidgetFactory rather than pre-translating the .ui XML file to ruby with
> rbuic.  Here's a simple program:
>
>       require 'Qt'
>       require 'qui'
>       a = Qt::Application.new(ARGV)
>       w = QUI::WidgetFactory.create "sampledialog.ui"
>       w.show()
>       a.connect(a, SIGNAL('lastWindowClosed()'), a, SLOT('quit()'))
>       a.exec()
>
> This works just fine in that it dynamically loads and presents the .ui
> file as a window.  However, how do I connect signals and slots?  I
> understand the process of method override when doing it the rbuic way,
> but this doesn't seem to be working with WidgetFactory.  The signals and
> slots (but not their handling) are defined in the .ui file.  Could
> someone give this noob an example of how to implement a slot method?  I
> tried looking at some C++ examples, but I'm just not making the
> connection to ruby.  The .ui file is below.  It just has two buttons,
> Test and Close.
>
> Thanks,
>
> David

Not tested, because I'm using Qt 4 while, I think, you're using Qt 3. The idea 
is to create a custom widget class and to add the widget returned by 
WidgetFactory.create as child widget. You shouldn't define custom slots in the 
ui file, since there's no way to implement them. Any custom slot you'd define 
in the ui file is instead defined in the custom widget. Here's a simple 
example which should work:

require 'Qt'
require 'qui'

class MainWidget < Qt::Widget
  
  slots 'test()'
  
  def initialize
    @widget = QUI::WidgetFactory.create "sampledialog.ui"
    self.layout = Qt::VBoxLayout.new
    self.layout.add_widget @widget
    connect @widget.child('testButton'), SIGNAL('clicked()'), self, 
SLOT('test()')
  end
  
  def test
    puts "test button clicked"
  end
  
end

app = Qt::Application.new ARGV
w = MainWidget.new 
w.show
a.connect(a, SIGNAL('lastWindowClosed()'), a, SLOT('quit()'))
a.exec


I hope this helps

Stefano