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Ruby + Qt4, a simple text editor, part 2

In the previous post ( f3ex.habrahabr.ru/blog/54673 ) I wrote how to write a simple text editor using ruby ​​and Qt4.
Continuing porting examples from Python + Qt4 to Ruby + Qt4

Part 2.

Now consider the following question: when a file is not selected or no changes are made to the text - the “save” button should be inactive.
The “enabled” property in Qt Disigner is responsible for activity, or this property can be set from ruby-code using the setEnabled method
Set the b_save button's enabled property to false (uncheck the box) and regenerate the editor.rb form.
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To find out if the text has changed, we will use the textChanged () signal for textEdit.

Let's change the start.rb code to the following:

Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  1. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  2. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  4. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  6. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  8. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  9. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  10. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  11. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  12. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  13. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  14. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  15. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  17. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  18. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  19. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  20. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  21. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  22. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  23. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  24. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  25. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  26. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  28. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  29. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  30. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  32. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  33. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  34. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  35. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  36. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  37. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  38. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  39. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  41. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  42. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  43. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  44. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  45. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end
  46. Copy Source | Copy HTML require 'Qt4' require 'editor.rb' class StartQT4 < Qt::MainWindow slots 'file_dialog()' , 'file_save()' , 'enable_save()' def initialize parent= nil super @ui = Ui_Notepad.new @ui.setupUi self Qt:: Object .connect(@ui.b_open, SIGNAL( 'clicked()' ), self , SLOT( 'file_dialog()' )) Qt:: Object .connect(@ui.b_save, SIGNAL( 'clicked()' ), self , SLOT( 'file_save()' )) Qt:: Object .connect(@ui.editor_window, SIGNAL( 'textChanged()' ), self , SLOT( 'enable_save()' )) end def file_dialog f = Qt::FileDialog if @filename = f.getOpenFileName text = File . new (@filename).read @ui.editor_window.setText text # # "" textChanged() @ui.b_save.setEnabled false end end def enable_save @ui.b_save.setEnabled true end def file_save if @filename f = File .new @filename, 'w' f. puts @ui.editor_window.toPlainText f.close end end end if $ 0 == __FILE__ app = Qt::Application. new (ARGV) myapp = StartQT4 .new myapp.show app. exec end


What has been added. We have added a slot that is called when the text changes in textEdit and activates the button:
Copy Source | Copy HTML
  1. Qt :: Object .connect (@ ui.editor_window, SIGNAL ( 'textChanged ()' ), self , SLOT ( 'enable_save ()' ))


Copy Source | Copy HTML
  1. def enable_save
  2. @ ui.b_save.setEnabled true
  3. end


In the file_dialog method, when we add text to the textEdit from the file, we deactivate the button:
Copy Source | Copy HTML
  1. @ ui.b_save.setEnabled false


Now when we open a file, the changes in the current open file are not saved. It is necessary to make a dialog box (message box) that will ask about changes - “save”, “do not save” or “cancel”. For these purposes we will use MessageBox.

The call to the message box is as follows.
Copy Source | Copy HTML
  1. message = Qt :: MessageBox.new
  2. message. exec


image

Need to configure this window. We will add buttons and some text. But how do we do it? We need to edit the file_dialog method and if changes have been made, show the message. How do we know if there have been changes? If the “save” button is active (@ ui.b_save.idEnabled), then we have unsaved changes. And so, we will make changes:

Copy Source | Copy HTML
  1. require 'Qt4'
  2. require 'editor.rb'
  4. class StartQT4 <Qt :: MainWindow
  6. slots 'file_dialog ()' , 'file_save ()' , 'enable_save ()'
  8. def initialize parent = nil
  9. super
  10. @ui = Ui_Notepad.new
  11. @ ui.setupUi self
  12. Qt :: Object .connect (@ ui.b_open, SIGNAL ( 'clicked ()' ), self , SLOT ( 'file_dialog ()' ))
  13. Qt :: Object .connect (@ ui.b_save, SIGNAL ( 'clicked ()' ), self , SLOT ( 'file_save ()' ))
  14. Qt :: Object .connect (@ ui.editor_window, SIGNAL ( 'textChanged ()' ), self , SLOT ( 'enable_save ()' ))
  15. end
  17. def file_dialog
  18. response = false
  19. # Button text:
  20. save = 'Save'
  21. discard = 'Do not save'
  22. cancel = 'Cancel'
  23. # If there were changes, call message_box
  24. if @ ui.b_save.isEnabled && @filename
  25. message = Qt :: MessageBox.new
  26. message.setText 'What should I do with unsaved changes?'
  27. message.setWindowTitle ( 'Notepad' )
  28. message.setIcon (Qt :: MessageBox.Question)
  29. message.addButton (save, Qt :: MessageBox.AcceptRole)
  30. message.addButton (discard, Qt :: MessageBox.DestructiveRole)
  31. message.addButton (cancel, Qt :: MessageBox.RejectRole)
  32. message.setDetailedText ( 'Unsaved file changes:' + @ filename.to_s)
  33. message. exec
  34. response = message.clickedButton.text
  35. # Save file
  36. if response == save
  37. file_save
  38. @ ui.b_save.setEnabled false
  39. end
  40. # Do not save
  41. if response == discard
  42. @ ui.b_save.setEnabled false
  43. end
  44. end
  45. # If we do not want to save changes
  46. unless response == cancel
  47. f = Qt :: FileDialog
  48. if @filename = f.getOpenFileName
  49. text = File . new (@filename) .read
  50. @ ui.editor_window.setText text
  51. @ ui.b_save.setEnabled false
  52. end
  53. end
  54. end
  56. def enable_save
  57. @ ui.b_save.setEnabled true
  58. end
  60. def file_save
  61. if @filename
  62. f = File .new @filename, 'w'
  63. f. puts @ ui.editor_window.toPlainText
  64. f.close
  65. end
  66. end
  67. end
  69. if $ 0 == __FILE__
  70. app = Qt :: Application. new (ARGV)
  71. myapp = StartQT4 .new
  72. myapp.show
  73. app. exec
  74. end


Changes made to lines 18-46

We create a new instance of the Qt :: MessageBox class, assign a message text (setText), a window title setWindowTitle, an icon (setIcon), set 3 buttons (“save”, “not save” and “cancel”). As the second argument, set the types of buttons (role). Information on these types can be found in the QT documentation. setDetailedText sets a detailed message output when you click on the "show details" button. Finally, we call the exec method. message.clickedButton - returns the pushButton type of the pressed button. We in the example just operate on the text of this button.
The dialog box looks like this:

image

Source code example can be downloaded at:
Previous example: narod.ru/disk/6746280000/ruby_qt_simple_editor_1.zip.html
Current example: narod.ru/disk/6746302000/ruby_qt_simple_editor_2.zip.html

Porting to the ruby ​​of the following example: www.rkblog.rk.edu.pl/w/p/extending-pyqt4-text-editor

Source: https://habr.com/ru/post/54787/

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