1 files changed, 66 insertions, 0 deletions
diff --git a/src/main/kotlin/de/romjaki/pluggabledino/api/ToggleButton.kt b/src/main/kotlin/de/romjaki/pluggabledino/api/ToggleButton.kt
new file mode 100644
index 0000000..cce59fc
--- /dev/null
+++ b/src/main/kotlin/de/romjaki/pluggabledino/api/ToggleButton.kt
@@ -0,0 +1,66 @@
+package de.romjaki.pluggabledino.api
+
+import de.romjaki.pluggabledino.*
+import org.newdawn.slick.Graphics
+import org.newdawn.slick.Input
+import java.awt.Rectangle
+import kotlin.math.max
+
+typealias ChangeListener = (index: Int) -> Unit
+
+class ToggleButton(private val texts: List<String>, val x: Float, val y: Float) {
+
+    val width = max(buttonImage.width, texts.map { font.getWidth(it) + 10 }.max()!!)
+    val image = buttonImage.getScaledCopy(width, buttonImage.height)
+
+    private var lastClicked = false
+    var index = 0
+
+
+    val leftX
+        get() = x - width / 2
+    val rightX
+        get() = x + width / 2
+    val topY
+        get() = y - image.height / 2
+    val bottomY
+        get() = y + image.height / 2
+
+    private val changeListeners = mutableListOf<ChangeListener>()
+
+    val rectangle
+        get() = Rectangle(leftX.toInt(), topY.toInt(), (rightX - leftX).toInt(), (bottomY - topY).toInt())
+
+    fun addChangeListener(block: ChangeListener) {
+        changeListeners.add(block)
+    }
+
+    fun draw(g: Graphics) {
+        g.drawImageCentered(image, x, y)
+        g.drawStringCentered(texts[index], x, y)
+    }
+
+    override fun toString(): String =
+            "X: $leftX - $rightX, $topY - $bottomY, width=$width"
+
+    fun enter() {
+        lastClicked = true
+    }
+
+    fun isClicked(input: Input): Boolean =
+            input.isMouseButtonDown(Input.MOUSE_LEFT_BUTTON) && isMouseOver(input)
+
+    fun update(input: Input) {
+        val ret = isClicked(input)
+        if (!lastClicked && ret) {
+            index = (index + 1) % texts.size
+            changeListeners.forEach { it(index) }
+        }
+        lastClicked = ret
+    }
+
+    fun isMouseOver(input: Input): Boolean =
+            rectangle.contains((input.mouseX / WIDTH_RATIO).toInt(), (input.mouseY / HEIGHT_RATIO).toInt())
+
+}
+