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

package net.torvald.terrarum.ui

import com.badlogic.gdx.graphics.Camera
import net.torvald.terrarum.*
import net.torvald.terrarum.langpack.Lang
import com.badlogic.gdx.graphics.Color
import com.badlogic.gdx.graphics.g2d.GlyphLayout
import com.badlogic.gdx.graphics.g2d.SpriteBatch

/**
 * Text button. Height of hitbox is extended (double lineHeight, or 40 px) for better clicking
 *
 * Created by minjaesong on 2017-03-13.
 */
open 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 activeBackCol: Color = Color(0),
        val activeBackBlendMode: String = BlendMode.NORMAL,
        val highlightCol: Color = defaultHighlightCol,
        val highlightBackCol: Color = Color(0xb0b0b0_ff.toInt()),
        val highlightBackBlendMode: String = BlendMode.MULTIPLY,
        val inactiveCol: Color = defaultInactiveCol,
        val preGapX:  Int = 0,
        val postGapX: Int = 0
) : UIItem(parentUI) {

    companion object {
        val font = Terrarum.fontGame
        val height = font.lineHeight.toInt() * 2
        val defaultInactiveCol: Color = Color(0xc8c8c8_ff.toInt())
        val defaultHighlightCol: Color = Color(0x00f8ff_ff)
    }

    val label: String
        get() = if (readFromLang) Lang[labelText] else labelText


    override val height: Int = UIItemTextButton.height

    var highlighted: Boolean = false


    private val glyphLayout = GlyphLayout()

    override fun render(batch: SpriteBatch, camera: Camera) {
        val textW = font.getWidth(label)


        if (highlighted) {
            BlendMode.resolve(highlightBackBlendMode)
            batch.color = highlightBackCol
            batch.fillRect(posX.toFloat(), posY.toFloat(), width.toFloat(), height.toFloat())
        }
        else if (mouseUp) {
            BlendMode.resolve(activeBackBlendMode)
            batch.color = activeBackCol
            batch.fillRect(posX.toFloat(), posY.toFloat(), width.toFloat(), height.toFloat())
        }

        blendNormal()


        batch.color = if (highlighted) highlightCol
        else if (mouseUp) activeCol
        else inactiveCol

        font.draw(batch,
                label,
                posX.toFloat() + width.minus(textW).div(2) + (preGapX - postGapX).div(2),
                posY.toFloat() + height / 4
        )
    }

    override fun dispose() {
    }

    override fun keyDown(keycode: Int): Boolean {
        return super.keyDown(keycode)
    }

    override fun keyUp(keycode: Int): Boolean {
        return super.keyUp(keycode)
    }

    override fun mouseMoved(screenX: Int, screenY: Int): Boolean {
        return super.mouseMoved(screenX, screenY)
    }

    override fun touchDragged(screenX: Int, screenY: Int, pointer: Int): Boolean {
        return super.touchDragged(screenX, screenY, pointer)
    }

    override fun touchDown(screenX: Int, screenY: Int, pointer: Int, button: Int): Boolean {
        return super.touchDown(screenX, screenY, pointer, button)
    }

    override fun touchUp(screenX: Int, screenY: Int, pointer: Int, button: Int): Boolean {
        return super.touchUp(screenX, screenY, pointer, button)
    }

    override fun scrolled(amount: Int): Boolean {
        return super.scrolled(amount)
    }
}