Swing builder example (started)

examples/src/swing/SwingBuilder.kt

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+package kool.swing
+
+import javax.swing.*
+import java.awt.*
+import java.awt.event.*
+
+var Container.south : JComponent
+  get() = throw UnsupportedOperationException()
+  set(comp) {add(comp, BorderLayout.SOUTH)}
+
+var Container.north : JComponent
+  get() = throw UnsupportedOperationException()
+  set(comp) {add(comp, BorderLayout.NORTH)}
+
+var Container.east : JComponent
+  get() = throw UnsupportedOperationException()
+  set(comp) {add(comp, BorderLayout.EAST)}
+
+var Container.west : JComponent
+  get() = throw UnsupportedOperationException()
+  set(comp) {add(comp, BorderLayout.WEST)}
+
+var Container.center : JComponent
+  get() = throw UnsupportedOperationException()
+  set(comp) {add(comp, BorderLayout.CENTER)}
+
+class KFrame(title : String, init : KFrame.() -> Unit) : JFrame(title) {
+  {
+    this.init()
+  }
+
+  fun <T : JComponent> T.toSouth() : T {
+    this@KFrame.add(this, BorderLayout.SOUTH)
+    return this
+  }
+}
+
+
+fun JPanel(init : JPanel.() -> Unit) : JPanel {
+  val p = JPanel()
+  p.init()
+  return p
+}
+
+//fun KFrame(title : String, init : JFrame.() -> Unit) : JFrame {
+//  val result = JFrame(title)
+//  result.init()
+//  return result
+//}
+
+fun JButton(text : String, action : (ActionEvent) -> Unit) : JButton {
+  val result = JButton(text)
+  result.addActionListener(object : ActionListener {
+      override fun actionPerformed(e: ActionEvent?) {
+          action(e.sure())
+      }
+  })
+  return result
+}
+
+var JFrame.title : String
+  get() = getTitle().sure()
+  set(t) {setTitle(t)}
+
+var JFrame.size : #(Int, Int)
+  get() = #(getSize().sure().getWidth().int, getSize().sure().getHeight().int)
+  set(dim) {setSize(Dimension(dim._1, dim._2))}
+
+var JFrame.height : Int
+  get() = getSize().sure().getHeight().int
+  set(h) {setSize(width, h)}
+
+var JFrame.width : Int
+  get() = getSize().sure().getWidth().int
+  set(w) {setSize(height, w)}
+
+var JFrame.defaultCloseOperation : Int
+  get() = getDefaultCloseOperation()
+  set(def) {setDefaultCloseOperation(def)}
+

examples/src/swing/SwingBuilderTest.kt

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+package demo
+
+import kool.swing.*
+import javax.swing.*
+
+val greeting = "Hello,\n\nEnter some text here!"
+
+fun main(args : Array<String>) {
+  KFrame("Demo") {
+    height = 100
+    width = 100
+    defaultCloseOperation = JFrame.EXIT_ON_CLOSE
+
+    val text = JTextArea(greeting)
+    center = text
+
+    val southPanel = JPanel {
+        west = JButton("Clear") {
+          text.setText("")
+        }
+
+        east = JButton("Restore") {
+          text.setText(greeting)
+        }
+    }
+
+  }.show()
+
+}