103 lines
3.7 KiB
Kotlin
103 lines
3.7 KiB
Kotlin
/* Copyright 2017 Andrew Dawson
|
|
*
|
|
* This file is a part of Tusky.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it under the terms of the
|
|
* GNU General Public License as published by the Free Software Foundation; either version 3 of the
|
|
* License, or (at your option) any later version.
|
|
*
|
|
* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
|
|
* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
|
|
* Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along with Tusky; if not,
|
|
* see <http://www.gnu.org/licenses>.
|
|
*/
|
|
|
|
package com.keylesspalace.tusky.util
|
|
|
|
import android.text.Editable
|
|
import android.text.TextWatcher
|
|
import android.util.Log
|
|
import android.view.View
|
|
import android.widget.EditText
|
|
import androidx.recyclerview.widget.RecyclerView
|
|
import androidx.viewpager2.widget.ViewPager2
|
|
|
|
fun View.show() {
|
|
this.visibility = View.VISIBLE
|
|
}
|
|
|
|
fun View.hide() {
|
|
this.visibility = View.GONE
|
|
}
|
|
|
|
fun View.visible(visible: Boolean, or: Int = View.GONE) {
|
|
this.visibility = if (visible) View.VISIBLE else or
|
|
}
|
|
|
|
open class DefaultTextWatcher : TextWatcher {
|
|
override fun afterTextChanged(s: Editable) {
|
|
}
|
|
|
|
override fun beforeTextChanged(s: CharSequence, start: Int, count: Int, after: Int) {
|
|
}
|
|
|
|
override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
|
|
}
|
|
}
|
|
|
|
inline fun EditText.onTextChanged(
|
|
crossinline callback: (s: CharSequence, start: Int, before: Int, count: Int) -> Unit
|
|
) {
|
|
addTextChangedListener(object : DefaultTextWatcher() {
|
|
override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
|
|
callback(s, start, before, count)
|
|
}
|
|
})
|
|
}
|
|
|
|
inline fun EditText.afterTextChanged(
|
|
crossinline callback: (s: Editable) -> Unit
|
|
) {
|
|
addTextChangedListener(object : DefaultTextWatcher() {
|
|
override fun afterTextChanged(s: Editable) {
|
|
callback(s)
|
|
}
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Reduce ViewPager2's sensitivity to horizontal swipes.
|
|
*/
|
|
fun ViewPager2.reduceSwipeSensitivity() {
|
|
// ViewPager2 is very sensitive to horizontal motion when swiping vertically, and will
|
|
// trigger a page transition if the user's swipe is only a few tens of degrees off from
|
|
// vertical. This is a problem if the underlying content is a list that the user wants
|
|
// to scroll vertically -- it's far too easy to trigger an accidental horizontal swipe.
|
|
//
|
|
// One way to stop this is to reach in to ViewPager2's RecyclerView and adjust the amount
|
|
// of touch slop it has.
|
|
//
|
|
// See https://issuetracker.google.com/issues/139867645 and
|
|
// https://bladecoder.medium.com/fixing-recyclerview-nested-scrolling-in-opposite-direction-f587be5c1a04
|
|
// for more (the approach in that Medium article works, but is still quite sensitive to
|
|
// horizontal movement while scrolling).
|
|
try {
|
|
val recyclerViewField = ViewPager2::class.java.getDeclaredField("mRecyclerView")
|
|
recyclerViewField.isAccessible = true
|
|
val recyclerView = recyclerViewField.get(this) as RecyclerView
|
|
|
|
val touchSlopField = RecyclerView::class.java.getDeclaredField("mTouchSlop")
|
|
touchSlopField.isAccessible = true
|
|
val touchSlop = touchSlopField.get(recyclerView) as Int
|
|
// Experimentally, 2 seems to be a sweet-spot, requiring a downward swipe that's at least
|
|
// 45 degrees off the vertical to trigger a change. This is consistent with maximum angle
|
|
// supported to open the nav. drawer.
|
|
val scaleFactor = 2
|
|
touchSlopField.set(recyclerView, touchSlop * scaleFactor)
|
|
} catch (e: Exception) {
|
|
Log.w("reduceSwipeSensitivity", e)
|
|
}
|
|
}
|