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/*
* Copyright 2019 Allan Wang
*
* 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.pitchedapps.frost.views
import android.annotation.SuppressLint
import android.content.Context
import android.graphics.Rect
import android.util.AttributeSet
import android.view.MotionEvent
import android.view.View
import android.widget.FrameLayout
import androidx.core.view.ViewCompat
import androidx.customview.widget.ViewDragHelper
class DragFrame @JvmOverloads constructor(
context: Context,
attrs: AttributeSet? = null,
defStyleAttr: Int = 0
) : FrameLayout(context, attrs, defStyleAttr) {
var dragHelper: ViewDragHelper? = null
var viewToIgnore: View? = null
private val rect = Rect()
private val location = IntArray(2)
private var shouldIgnore: Boolean = false
override fun onInterceptTouchEvent(event: MotionEvent): Boolean {
if (event.actionMasked == MotionEvent.ACTION_DOWN) {
shouldIgnore = shouldIgnore(event)
}
if (shouldIgnore) {
return false
}
return try {
dragHelper?.shouldInterceptTouchEvent(event) ?: false
} catch (e: Exception) {
false
}
}
@SuppressLint("ClickableViewAccessibility")
override fun onTouchEvent(event: MotionEvent): Boolean {
if (event.actionMasked == MotionEvent.ACTION_DOWN) {
shouldIgnore = shouldIgnore(event)
}
if (shouldIgnore) {
return false
}
try {
dragHelper?.processTouchEvent(event) ?: return false
} catch (e: Exception) {
return false
}
return true
}
override fun dispatchTouchEvent(event: MotionEvent): Boolean {
if (event.actionMasked == MotionEvent.ACTION_DOWN) {
shouldIgnore = shouldIgnore(event)
}
if (shouldIgnore) {
return false
}
return super.dispatchTouchEvent(event)
}
private fun shouldIgnore(event: MotionEvent): Boolean {
val v = viewToIgnore ?: return false
v.getDrawingRect(rect)
v.getLocationOnScreen(location)
rect.offset(location[0], location[1])
return rect.contains(event.rawX.toInt(), event.rawY.toInt())
}
override fun computeScroll() {
super.computeScroll()
if (dragHelper?.continueSettling(true) == true) {
ViewCompat.postInvalidateOnAnimation(this)
}
}
}
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