BayernMessenger/app/src/main/java/im/vector/riotredesign/core/platform/CheckableConstraintLayout.kt

package im.vector.riotredesign.core.platform

import android.content.Context
import android.support.constraint.ConstraintLayout
import android.util.AttributeSet
import android.view.View
import android.widget.Checkable

class CheckableConstraintLayout : ConstraintLayout, Checkable {

    private var mChecked = false

    constructor(context: Context) : super(context) {}

    constructor(context: Context, attrs: AttributeSet) : super(context, attrs) {}

    constructor(context: Context, attrs: AttributeSet, defStyleAttr: Int) : super(context, attrs, defStyleAttr) {}

    override fun isChecked(): Boolean {
        return mChecked
    }

    override fun setChecked(b: Boolean) {
        if (b != mChecked) {
            mChecked = b
            refreshDrawableState()
        }
    }

    override fun toggle() {
        isChecked = !mChecked
    }

    public override fun onCreateDrawableState(extraSpace: Int): IntArray {
        val drawableState = super.onCreateDrawableState(extraSpace + 1)
        if (isChecked) {
            View.mergeDrawableStates(drawableState, CHECKED_STATE_SET)
        }
        return drawableState
    }

    companion object {
        private val CHECKED_STATE_SET = intArrayOf(android.R.attr.state_checked)
    }
}