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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
class Button(private val text: String, val x: Float, val y: Float) {
val width = max(buttonImage.width, font.getWidth(text) + 10)
val image = buttonImage.getScaledCopy(width, buttonImage.height)
private var lastClicked = false
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
val rectangle
get() = Rectangle(leftX.toInt(), topY.toInt(), (rightX - leftX).toInt(), (bottomY - topY).toInt())
private val clickHandlers = mutableListOf<() -> Unit>()
fun addClickHandler(handler: () -> Unit) {
clickHandlers.add(handler)
}
fun draw(g: Graphics) {
g.drawImageCentered(image, x, y)
g.drawStringCentered(text, 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) {
clickHandlers.forEach({ it() })
}
lastClicked = ret
}
fun isMouseOver(input: Input): Boolean =
rectangle.contains((input.mouseX / WIDTH_RATIO).toInt(), (input.mouseY / HEIGHT_RATIO).toInt())
}
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