UI testing env and working text buttons

Former-commit-id: b8fd27c7f71f9bc8da259ae132badcbc9ce117ac

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

@@ -0,0 +1,82 @@
+package net.torvald.terrarum.ui
+
+import net.torvald.terrarum.Terrarum
+import net.torvald.terrarum.langpack.Lang
+import org.newdawn.slick.Color
+import org.newdawn.slick.GameContainer
+import org.newdawn.slick.Graphics
+
+/**
+ * Text button. Height of hitbox is extended (double lineHeight, or 40 px) for better clicking
+ *
+ * Created by SKYHi14 on 2017-03-13.
+ */
+class UIItemTextButton(
+        parentUI: UICanvas,
+        val labelText: String,
+        override var posX: Int,
+        override var posY: Int,
+        override val width: Int,
+        val readFromLang: Boolean = false,
+        val activeCol: Color = Color.white,
+        val highlightCol: Color = Color(0x00f8ff),
+        val inactiveCol: Color = Color(0xc0c0c0)
+) : UIItem(parentUI) {
+
+    companion object {
+        val font = Terrarum.fontGame!!
+        val height = font.lineHeight * 2
+    }
+
+    private val label: String
+        get() = if (readFromLang) Lang[labelText] else labelText
+
+
+    override val height: Int = UIItemTextButton.height
+
+    var highlighted: Boolean = false
+    var mouseOver = false
+
+
+    override fun update(gc: GameContainer, delta: Int) {
+    }
+
+    override fun render(gc: GameContainer, g: Graphics) {
+        val textW = font.getWidth(label)
+
+        g.font = font
+        mouseOver = mouseUp
+        g.color = if (highlighted) highlightCol
+                  else if (mouseOver)           activeCol
+                  else                       inactiveCol
+
+        g.drawString(label, posX.toFloat() + (width.minus(textW).div(2)), posY.toFloat() + height / 4)
+    }
+
+    override fun keyPressed(key: Int, c: Char) {
+    }
+
+    override fun keyReleased(key: Int, c: Char) {
+    }
+
+    override fun mouseMoved(oldx: Int, oldy: Int, newx: Int, newy: Int) {
+    }
+
+    override fun mouseDragged(oldx: Int, oldy: Int, newx: Int, newy: Int) {
+    }
+
+    override fun mousePressed(button: Int, x: Int, y: Int) {
+    }
+
+    override fun mouseReleased(button: Int, x: Int, y: Int) {
+    }
+
+    override fun mouseWheelMoved(change: Int) {
+    }
+
+    override fun controllerButtonPressed(controller: Int, button: Int) {
+    }
+
+    override fun controllerButtonReleased(controller: Int, button: Int) {
+    }
+}