| /* |
| * Copyright 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.example.androidx.viewpager2 |
| |
| import android.os.Bundle |
| import android.view.View |
| import android.widget.AdapterView |
| import android.widget.ArrayAdapter |
| import android.widget.Button |
| import android.widget.CheckBox |
| import android.widget.Spinner |
| import android.widget.SpinnerAdapter |
| import androidx.fragment.app.FragmentActivity |
| import androidx.viewpager2.widget.ViewPager2 |
| import androidx.viewpager2.widget.ViewPager2.ORIENTATION_HORIZONTAL |
| import androidx.viewpager2.widget.ViewPager2.ORIENTATION_VERTICAL |
| import com.example.androidx.viewpager2.cards.Card |
| |
| /** |
| * Base class for the two activities in the demo. Sets up the list of cards and implements UI to |
| * jump to arbitrary cards using setCurrentItem, either with or without smooth scrolling. |
| */ |
| abstract class BaseCardActivity : FragmentActivity() { |
| |
| lateinit var viewPager: ViewPager2 |
| private lateinit var cardSelector: Spinner |
| private lateinit var smoothScrollCheckBox: CheckBox |
| private lateinit var rotateCheckBox: CheckBox |
| private lateinit var translateCheckBox: CheckBox |
| private lateinit var scaleCheckBox: CheckBox |
| private lateinit var gotoPage: Button |
| private lateinit var orientationSelector: Spinner |
| private lateinit var disableUserInputCheckBox: CheckBox |
| private var orientation: Int = ORIENTATION_HORIZONTAL |
| |
| private val translateX get() = orientation == ORIENTATION_VERTICAL && |
| translateCheckBox.isChecked |
| private val translateY get() = orientation == ORIENTATION_HORIZONTAL && |
| translateCheckBox.isChecked |
| |
| protected open val layoutId: Int = R.layout.activity_no_tablayout |
| |
| private val mAnimator = ViewPager2.PageTransformer { page, position -> |
| val absPos = Math.abs(position) |
| page.apply { |
| rotation = if (rotateCheckBox.isChecked) position * 360 else 0f |
| translationY = if (translateY) absPos * 500f else 0f |
| translationX = if (translateX) absPos * 350f else 0f |
| if (scaleCheckBox.isChecked) { |
| val scale = if (absPos > 1) 0F else 1 - absPos |
| scaleX = scale |
| scaleY = scale |
| } else { |
| scaleX = 1f |
| scaleY = 1f |
| } |
| } |
| } |
| |
| public override fun onCreate(savedInstanceState: Bundle?) { |
| super.onCreate(savedInstanceState) |
| setContentView(layoutId) |
| |
| viewPager = findViewById(R.id.view_pager) |
| orientationSelector = findViewById(R.id.orientation_spinner) |
| disableUserInputCheckBox = findViewById(R.id.disable_user_input_checkbox) |
| cardSelector = findViewById(R.id.card_spinner) |
| smoothScrollCheckBox = findViewById(R.id.smooth_scroll_checkbox) |
| rotateCheckBox = findViewById(R.id.rotate_checkbox) |
| translateCheckBox = findViewById(R.id.translate_checkbox) |
| scaleCheckBox = findViewById(R.id.scale_checkbox) |
| gotoPage = findViewById(R.id.jump_button) |
| |
| disableUserInputCheckBox.setOnCheckedChangeListener { _, isDisabled -> |
| viewPager.isUserInputEnabled = !isDisabled |
| } |
| |
| orientationSelector.adapter = createOrientationAdapter() |
| cardSelector.adapter = createCardAdapter() |
| |
| viewPager.setPageTransformer(mAnimator) |
| |
| orientationSelector.onItemSelectedListener = object : AdapterView.OnItemSelectedListener { |
| override fun onItemSelected( |
| parent: AdapterView<*>, |
| view: View?, |
| position: Int, |
| id: Long |
| ) { |
| when (parent.selectedItem.toString()) { |
| HORIZONTAL -> orientation = ORIENTATION_HORIZONTAL |
| VERTICAL -> orientation = ORIENTATION_VERTICAL |
| } |
| viewPager.orientation = orientation |
| } |
| |
| override fun onNothingSelected(adapterView: AdapterView<*>) {} |
| } |
| |
| gotoPage.setOnClickListener { |
| val card = cardSelector.selectedItemPosition |
| val smoothScroll = smoothScrollCheckBox.isChecked |
| viewPager.setCurrentItem(card, smoothScroll) |
| } |
| } |
| |
| private fun createCardAdapter(): SpinnerAdapter { |
| val adapter = ArrayAdapter(this, android.R.layout.simple_spinner_item, Card.DECK) |
| adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item) |
| return adapter |
| } |
| |
| private fun createOrientationAdapter(): SpinnerAdapter { |
| val adapter = ArrayAdapter(this, |
| android.R.layout.simple_spinner_item, arrayOf(HORIZONTAL, VERTICAL)) |
| adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item) |
| return adapter |
| } |
| |
| companion object { |
| val cards = Card.DECK |
| private const val HORIZONTAL = "horizontal" |
| private const val VERTICAL = "vertical" |
| } |
| } |
