52 lines
1.6 KiB
Plaintext
52 lines
1.6 KiB
Plaintext
import java.awt.GridLayout
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import java.awt.event.ActionEvent
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import java.awt.event.ActionListener
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import java.awt.event.KeyEvent
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import java.awt.event.KeyListener
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import javax.swing.*
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class Interact : JFrame() {
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val numberField = JTextField()
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val incButton = JButton("Increment")
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val randButton = JButton("Random")
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val buttonPanel = JPanel()
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init {
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defaultCloseOperation = JFrame.EXIT_ON_CLOSE
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numberField.text = "0"
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numberField.addKeyListener(object : KeyListener {
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override fun keyTyped(e : KeyEvent) : Unit {
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if (!Character.isDigit(e.keyChar)) e.consume()
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}
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override fun keyReleased(e : KeyEvent?) {}
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override fun keyPressed(e : KeyEvent) {}
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})
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incButton.addActionListener {
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val num = (numberField.text ?: "").toDouble()
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numberField.text = (num + 1).toString()
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}
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randButton.addActionListener(object : ActionListener {
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fun proceedOrNot() = JOptionPane.showConfirmDialog(randButton, "Are you sure?")
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override fun actionPerformed(e : ActionEvent) {
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if(proceedOrNot() == JOptionPane.YES_OPTION)
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numberField.text = (Math.random() * Long.MAX_VALUE).toString()
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}
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})
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layout = GridLayout(2, 1)
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buttonPanel.layout = GridLayout(1, 2)
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buttonPanel.add(incButton)
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buttonPanel.add(randButton)
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add(numberField)
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add(buttonPanel)
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pack()
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}
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}
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fun main(args : Array<String>) {
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Interact().isVisible = true
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}
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