Data commit

Task/GUI-component-interaction/Kotlin/gui-component-interaction.kotlin

@@ -0,0 +1,51 @@
+import java.awt.GridLayout
+import java.awt.event.ActionEvent
+import java.awt.event.ActionListener
+import java.awt.event.KeyEvent
+import java.awt.event.KeyListener
+import javax.swing.*
+
+class Interact : JFrame() {
+    val numberField = JTextField()
+    val incButton = JButton("Increment")
+    val randButton = JButton("Random")
+    val buttonPanel = JPanel()
+
+    init {
+        defaultCloseOperation = JFrame.EXIT_ON_CLOSE
+        numberField.text = "0"
+
+        numberField.addKeyListener(object : KeyListener {
+            override fun keyTyped(e : KeyEvent) : Unit {
+                if (!Character.isDigit(e.keyChar)) e.consume()
+            }
+            override fun keyReleased(e : KeyEvent?) {}
+            override fun keyPressed(e : KeyEvent) {}
+        })
+
+        incButton.addActionListener {
+            val num = (numberField.text ?: "").toDouble()
+            numberField.text = (num + 1).toString()
+        }
+
+        randButton.addActionListener(object : ActionListener {
+            fun proceedOrNot() = JOptionPane.showConfirmDialog(randButton, "Are you sure?")
+            override fun actionPerformed(e : ActionEvent) {
+                if(proceedOrNot() == JOptionPane.YES_OPTION)
+                    numberField.text = (Math.random() * Long.MAX_VALUE).toString()
+            }
+        })
+
+        layout = GridLayout(2, 1)
+        buttonPanel.layout = GridLayout(1, 2)
+        buttonPanel.add(incButton)
+        buttonPanel.add(randButton)
+        add(numberField)
+        add(buttonPanel)
+        pack()
+    }
+}
+
+fun main(args : Array<String>) {
+    Interact().isVisible = true
+}