38 lines
1.4 KiB
Kotlin
38 lines
1.4 KiB
Kotlin
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/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2017 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.view.transformer
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import android.support.v4.view.ViewPager
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import android.view.View
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object AccountsSelectorTransformer : ViewPager.PageTransformer {
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const internal val selectorAccountsCount: Int = 3
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override fun transformPage(page: View, position: Float) {
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if (position < 0) {
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page.alpha = 1 + position * selectorAccountsCount
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} else if (position > (selectorAccountsCount - 1f) / selectorAccountsCount) {
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page.alpha = (1 - position) * selectorAccountsCount
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} else {
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page.alpha = 1f
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}
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}
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}
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