added TextDisplay and GraphicsDisplay

src/magic_squares/GraphicsDisplay.scala

@@ -0,0 +1,53 @@
+package magic_squares
+
+import hevs.graphics.FunGraphics
+
+import java.awt.{Color, Font}
+import javax.swing.SwingConstants
+
+trait GraphicsDisplay extends Displayable {
+  private var _win: Option[FunGraphics] = None
+  private val WIDTH: Int = 400
+  private val HEIGHT: Int = 400
+  private val MARGIN: Int = 20
+  private val FONT: Font = new Font("Arial", Font.PLAIN, 24)
+  override def display(g: Grid): Unit = {
+    if (_win.isEmpty) {
+      _win = Some(new FunGraphics(WIDTH, HEIGHT))
+    }
+    val win: FunGraphics = _win.get
+    win.clear()
+    val size: Int = g.length
+
+    val w: Int = WIDTH - 2 * MARGIN
+    val h: Int = HEIGHT - 2 * MARGIN
+    val gridSize: Int = math.min(w, h)
+    val cellSize: Int = gridSize / size
+    val ox: Int = (WIDTH - gridSize) / 2
+    val oy: Int = (HEIGHT - gridSize) / 2
+
+    win.drawRect(ox, oy, gridSize, gridSize)
+    for (i: Int <- 1 until size) {
+      win.drawLine(ox + cellSize * i, oy, ox + cellSize * i, oy + gridSize)
+      win.drawLine(ox, oy + cellSize * i, ox + gridSize, oy + cellSize * i)
+    }
+
+    for (y: Int <- 0 until size) {
+      for (x: Int <- 0 until size) {
+        val v: Int = g(y)(x)
+        if (v != 0) {
+          win.drawString(
+            (ox + cellSize * (x + 0.5)).toInt,
+            (oy + cellSize * (y + 0.5)).toInt,
+            v.toString,
+            FONT,
+            Color.BLACK,
+            SwingConstants.CENTER,
+            SwingConstants.CENTER
+          )
+        }
+      }
+    }
+    win.syncGameLogic(5)
+  }
+}