import groovy.swing.SwingBuilder
import javax.swing.BoxLayout
import javax.swing.JFrame
import javax.swing.JOptionPane
import java.awt.BorderLayout
import java.awt.FlowLayout
import java.awt.GridLayout
import static javax.swing.WindowConstants.*
import static javax.swing.JOptionPane.showInputDialog

final layoutsList = ['FlowLayout', 'BorderLayout', 'GridLayout', 'BoxLayout']
final buttonList = ['Button1', 'Button2', 'Button3', 'Button4', 'Button5']
swing = new SwingBuilder()
JFrame f = new JFrame()
def answer = showInputDialog(f,"Choose layout",
        "Layouts",
        JOptionPane.QUESTION_MESSAGE, null, layoutsList as Object[], 'FlowLayout'

)
def borderLayoutConstraints = [ 'West', 'North', 'East', 'South', 'Center']
Integer i = 0

swing.edt {
    lookAndFeel('nimbus')

    frame(title: answer, pack: true, visible: true,
            defaultCloseOperation: EXIT_ON_CLOSE) {
        switch (answer){
            case 'BorderLayout':
                vbox() {
                    panel(layout: new FlowLayout()) {
                        label(text: answer)
                    }
                    panel(layout: new BorderLayout()) {
                        buttonList.each {
                            button(it, constraints: borderLayoutConstraints[i])
                            i++
                        }
                    }
                }
                break
            case 'FlowLayout':
                panel(layout: new FlowLayout()){
                    label(text: answer)
                    buttonList.each {
                       button(text:  it)
                    }
                }
                break
            case 'GridLayout':
                vbox() {
                    panel(layout: new FlowLayout()){
                        label(text: answer)
                    }
                    panel(layout: new GridLayout(2, 3)) {
                        buttonList.each {
                            button(text: it)
                        }
                    }
                }
                break
            case 'BoxLayout':
                vbox() {
                    panel(layout: new FlowLayout()){
                        label(text: answer)
                    }
                    panel() {
                        boxLayout(axis: BoxLayout.Y_AXIS)
                        buttonList.each {
                            button(text: it)
                        }
                    }
                }
                break
            default: break
        }
    }
}