Class: SpRadioGroupPresenter

I am a presener for reuse. I hold a title and a group of radio buttons. I can help to create and to manage a group of SpRadioButtonPresenters.

Instance Variables

• title - a SpLabelPresenter holds the caption of the group
• items - an OrderedCollection of objects that are displayed as radio buttons
• buttons - an OrderedCollection of radio buttons
• display - a BlockClosure an unary block defines the way to display the items
• columnCount - an Integer between 1 and 4 - the number of columns that the buttons are divided into
• index - an Integer between 1 and buttons size - the indes of the selected button
• whenIndexChangedDo - a BlockClosure an unary block - the event handler
• whenColumnsChangedDo - a BlockClosure an unary block - the event handler
• isEvenEvent - a Boolean helper variable

Public API

• beSingleColumn, beDoubleColumn, beTripleColumn, beQuatroColumn changes the count of columns of the buttons. The single column is set by default.
• display: anUnaryBloc sets a block to define the way to display the items
• title: aString sets the caption of the group of the buttons
• whenColumnsChangedDo: anUnaryBloc sets the event handler. The columnsCount will pass to the block
• whenIndexChangedDo: anUnaryBloc sets the event handler. The index will pass to the block
• items: aCollection changes the collection of objects that are displayed as radio buttons
• addItem: anObject adds the item to the collection of objects that are displayed as radio buttons
• itemSelected returns the object that corresponds to the selected button
• columnCount, indexSelected, title are simple getters

Loading and the instance creation

To load the progect execute

Metacello new
   baseline: 'RadioGroupProject';
   repository: 'github://LNUitTutor/RadioGroupProject/src';
   load

To create an instance use SpRadioGroupPresenter class >> on: aCollection or SpPresenter >> instantiate: SpRadioGroupPresenter on: aCollection. For example

 | group |
 group := (SpRadioGroupPresenter on: 'ABCDEFGH') title: 'Choose a letter'; beDoubleColumn.
 group open

By using SpRadioGroupPresenter new you will get SpRadioGroupPresenter on: #( 'Button 1' 'Button 2' 'Button 3' )