Data commit

Task/Honeycombs/Kotlin/honeycombs.kotlin

@@ -0,0 +1,147 @@
+// version 1.1.4
+
+import java.awt.BasicStroke
+import java.awt.BorderLayout
+import java.awt.Color
+import java.awt.Dimension
+import java.awt.Font
+import java.awt.Graphics
+import java.awt.Graphics2D
+import java.awt.Polygon
+import java.awt.RenderingHints
+import java.awt.event.KeyAdapter
+import java.awt.event.KeyEvent
+import java.awt.event.MouseAdapter
+import java.awt.event.MouseEvent
+import java.awt.event.WindowEvent
+import javax.swing.JFrame
+import javax.swing.JPanel
+import javax.swing.SwingUtilities
+
+class Honeycombs : JPanel() {
+    private val comb: Array<Hexagon?> = arrayOfNulls(20)
+
+    init {
+        preferredSize = Dimension(600, 500)
+        background = Color.white
+        isFocusable = true
+
+        addMouseListener(object : MouseAdapter() {
+            override fun mousePressed(e: MouseEvent) {
+                for (hex in comb)
+                    if (hex!!.contains(e.x, e.y)) {
+                        hex.setSelected()
+                        checkForClosure()
+                        break
+                    }
+                repaint()
+            }
+        })
+
+        addKeyListener(object : KeyAdapter() {
+            override fun keyPressed(e: KeyEvent) {
+                for (hex in comb)
+                    if (hex!!.letter == e.keyChar.toUpperCase()) {
+                        hex.setSelected()
+                        checkForClosure()
+                        break
+                    }
+                repaint()
+            }
+        })
+
+        val letters = "LRDGITPFBVOKANUYCESM".toCharArray()
+        val x1 = 150
+        val y1 = 100
+        val x2 = 225
+        val y2 = 143
+        val w = 150
+        val h = 87
+
+        for (i in 0 until comb.size) {
+            var x: Int
+            var y: Int
+            if (i < 12) {
+                x = x1 + (i % 3) * w
+                y = y1 + (i / 3) * h
+            }
+            else {
+                x = x2 + (i % 2) * w
+                y = y2 + ((i - 12) / 2) * h
+            }
+            comb[i] = Hexagon(x, y, w / 3, letters[i])
+        }
+
+        requestFocus()
+    }
+
+    override fun paintComponent(gg: Graphics) {
+        super.paintComponent(gg)
+        val g = gg as Graphics2D
+        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
+                           RenderingHints.VALUE_ANTIALIAS_ON)
+        g.font = Font("SansSerif", Font.BOLD, 30)
+        g.stroke = BasicStroke(3.0f)
+        for (hex in comb) hex!!.draw(g)
+    }
+
+    private fun checkForClosure() {
+        if (comb.all { it!!.hasBeenSelected } ) {
+            val f = SwingUtilities.getWindowAncestor(this) as JFrame
+            f.dispatchEvent(WindowEvent(f, WindowEvent.WINDOW_CLOSING))
+        }
+    }
+}
+
+class Hexagon(x: Int, y: Int, halfWidth: Int, c: Char) : Polygon() {
+    private val baseColor = Color.yellow
+    private val selectedColor = Color.magenta
+    var hasBeenSelected = false
+    val letter = c
+
+    init {
+        for (i in 0..5)
+            addPoint((x + halfWidth * Math.cos(i * Math.PI / 3.0)).toInt(),
+                     (y + halfWidth * Math.sin(i * Math.PI / 3.0)).toInt())
+        getBounds()
+    }
+
+    fun setSelected() {
+        hasBeenSelected = true
+    }
+
+    fun draw(g: Graphics2D) {
+        with(g) {
+            color = if (hasBeenSelected) selectedColor else baseColor
+            fillPolygon(this@Hexagon)
+            color = Color.black
+            drawPolygon(this@Hexagon)
+            color = if (hasBeenSelected) Color.black else Color.red
+            drawCenteredString(g, letter.toString())
+        }
+    }
+
+    private fun drawCenteredString(g: Graphics2D, s: String) {
+        val fm = g.fontMetrics
+        val asc = fm.ascent
+        val dec = fm.descent
+        val x = bounds.x + (bounds.width - fm.stringWidth(s)) / 2
+        val y = bounds.y + (asc + (bounds.height - (asc + dec)) / 2)
+        g.drawString(s, x, y)
+    }
+}
+
+fun main(args: Array<String>) {
+    SwingUtilities.invokeLater {
+        val f = JFrame()
+        with(f) {
+            defaultCloseOperation = JFrame.EXIT_ON_CLOSE
+            add(Honeycombs(), BorderLayout.CENTER)
+            title = "Honeycombs"
+            isResizable = false
+            pack()
+            setLocationRelativeTo(null)
+            isVisible = true
+        }
+    }
+}