# MotionLayoutStateHelper.kt

    /*
     * The MIT License
     *
     * Original work sponsored and donated by The Danish Health Data Authority (http://www.sundhedsdatastyrelsen.dk)
     *
     * Copyright (C) 2021 The Danish Health Data Authority (http://www.sundhedsdatastyrelsen.dk)
     *
     *
     * Permission is hereby granted, free of charge, to any person obtaining a copy of
     * this software and associated documentation files (the "Software"), to deal in
     * the Software without restriction, including without limitation the rights to
     * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
     * of the Software, and to permit persons to whom the Software is furnished to do
     * so, subject to the following conditions:
     *
     *
     * The above copyright notice and this permission notice shall be included in all
     * copies or substantial portions of the Software.
     *
     *
     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     * SOFTWARE.
     */

    package dk.nsp.mingraviditet.util.android.motionlayout

    import androidx.constraintlayout.motion.widget.MotionLayout
    import dk.nsp.mingraviditet.R

    enum class MotionLayoutStateEnum {
        Start, End
    }

    open class SimpleTransitionListener : MotionLayout.TransitionListener {

        private var currentState: MotionLayoutStateEnum = MotionLayoutStateEnum.Start
        var newStateCallback: ((MotionLayoutStateEnum) -> Unit)? = null

        fun getState(): MotionLayoutStateEnum {
            return currentState
        }

        override fun onTransitionStarted(
            p0: MotionLayout?,
            startState: Int,
            endState: Int
        ) {
        }

        override fun onTransitionChange(
            p0: MotionLayout?,
            startState: Int,
            endState: Int,
            progress: Float
        ) {
        }

        override fun onTransitionCompleted(p0: MotionLayout?, newState: Int) {
            when (newState) {
                R.id.start -> {
                    onTransition(MotionLayoutStateEnum.Start)
                }
                R.id.end -> {
                    onTransition(MotionLayoutStateEnum.End)
                }
            }
        }

        private fun onTransition(toolbarState: MotionLayoutStateEnum) {
            currentState = toolbarState
            newStateCallback?.invoke(toolbarState)
        }

        override fun onTransitionTrigger(
            p0: MotionLayout?,
            oldState: Int,
            newState: Boolean,
            progress: Float
        ) {
        }
    }