From: lolveley <lolveley@...>
Date: 2009-05-12T06:25:00+09:00
Subject: (mandriva,eclipse,Qt) elementary problem : signals and slots

hi,

I would like to make a little program using Qt : it's a displayer / 
converter between farenheit and celsius degrees.
I also want to use QtDesigner.

I made a little widget with QtDesigner, and this widget contains two 
dials(dial and dial_2) and two spinboxes(kind of textboxes) (spinbox and 
spinbox_2).
There are some connections : see below for the ruby file I obtained with 
the tool rbuic4 (which converts the ".ui" file into ".rb").
my problem is this : I want that some changes made in dial_2 modify dial 
(and then spinbox), eg :
    0 celsius degrees => 32 farenheit degrees.

here is the file made by rbuic4 and after this my try to modify the slot 
setValue (but it doesn't run: the value of dial is always the same as 
the one of dial_2.

temp.rb
*******************************************************************
=begin
** Form generated from reading ui file 'temp.ui'
**
** Created: lun. mai 11 21:43:04 2009
**      by: Qt User Interface Compiler version 4.5.0
**
** WARNING! All changes made in this file will be lost when recompiling 
ui file!
=end

class Ui_Form
    attr_accessor :dial
    attr_reader :dial_2
    attr_reader :spinBox
    attr_reader :spinBox_2

    def setupUi(form)
    if form.objectName.nil?
        form.objectName = "form"
    end
    form.resize(400, 300)
    @dial = Qt::Dial.new(form)
    @dial.objectName = "dial"
    @dial.geometry = Qt::Rect.new(90, 40, 91, 101)
    @dial_2 = Qt::Dial.new(form)
    @dial_2.objectName = "dial_2"
    @dial_2.geometry = Qt::Rect.new(230, 30, 91, 121)
    @spinBox = Qt::SpinBox.new(form)
    @spinBox.objectName = "spinBox"
    @spinBox.geometry = Qt::Rect.new(100, 200, 58, 28)
    @spinBox_2 = Qt::SpinBox.new(form)
    @spinBox_2.objectName = "spinBox_2"
    @spinBox_2.geometry = Qt::Rect.new(240, 200, 58, 28)

    retranslateUi(form)
    Qt::Object.connect(@dial_2, SIGNAL('valueChanged(int)'), @spinBox_2, 
SLOT('setValue(int)'))
    Qt::Object.connect(@dial, SIGNAL('valueChanged(int)'), @spinBox, 
SLOT('setValue(int)'))
    Qt::Object.connect(@dial_2, SIGNAL('valueChanged(int)'), @dial, 
SLOT('setValue(int)'))

    Qt::MetaObject.connectSlotsByName(form)
    end # setupUi

    def setup_ui(form)
        setupUi(form)
    end

    def retranslateUi(form)
    form.windowTitle = Qt::Application.translate("Form", "Form", nil, 
Qt::Application::UnicodeUTF8)
    end # retranslateUi

    def retranslate_ui(form)
        retranslateUi(form)
    end

end

module Ui
    class Form < Ui_Form
    end
end  # module Ui


*******************************************************************

temp_dsc_form.rb
*******************************************************************
require 'temp.rb'
require 'Qt4'

une_appli=Qt::Application.new(ARGV)
un_wdg=Qt::Widget.new
Un_form=Ui_Form.new
Un_form.setupUi(un_wdg)


def (Un_form.dial).setValue(v)

    #super((1.8*v+32).to_i) 
    super(0)
end

un_wdg.show
une_appli.exec

*******************************************************************


can you help me?

thx,

lolveley.







	

	
		
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