TextButtonList working kinematic background

Former-commit-id: 8976d3b3d1e40731adf13430ad747351a6401b24

src/net/torvald/terrarum/ui/UIItemImageGallery.kt

@@ -0,0 +1,81 @@
+package net.torvald.terrarum.ui
+
+import net.torvald.terrarum.gameactors.roundInt
+import org.newdawn.slick.GameContainer
+import org.newdawn.slick.Graphics
+import org.newdawn.slick.Image
+import java.util.*
+
+/**
+ * Image gallery. Images will be equally spaced, counted from top-left to bottom-right.
+ * Created by minjaesong on 16-08-08.
+ */
+class UIItemImageGallery(
+        parentUI: UICanvas,
+        override var posX: Int,
+        override var posY: Int,
+        override val width: Int,
+        override val height: Int,
+        val imageList: ArrayList<Image>,
+        val column: Int = 1
+) : UIItem(parentUI) {
+
+    override fun update(gc: GameContainer, delta: Int) {
+    }
+
+    override fun render(gc: GameContainer, g: Graphics) {
+        fun column(i: Int) = i % column
+        fun row(i: Int) = i / column
+
+        fun imagePosY(i: Int): Int {
+            val gutter = (height - imageList[i].height.times(imageList.size)).toFloat().div(
+                    imageList.size + 1f
+            )
+            return row((gutter * i.plus(1) + imageList[i].height * i).roundInt())
+        }
+
+        imageList.forEachIndexed { i, image ->
+            DrawUtil.drawCentered(g, image,
+                    imagePosY(i),
+                    width.toFloat().div(column).times(column(i).plus(1)).roundInt(),
+                    posX, posY
+            )
+        }
+    }
+
+    override fun keyPressed(key: Int, c: Char) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun keyReleased(key: Int, c: Char) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun mouseMoved(oldx: Int, oldy: Int, newx: Int, newy: Int) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun mouseDragged(oldx: Int, oldy: Int, newx: Int, newy: Int) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun mousePressed(button: Int, x: Int, y: Int) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun mouseReleased(button: Int, x: Int, y: Int) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun mouseWheelMoved(change: Int) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun controllerButtonPressed(controller: Int, button: Int) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+
+    override fun controllerButtonReleased(controller: Int, button: Int) {
+        throw UnsupportedOperationException("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+}