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Readrops
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Code Issues Packages Projects Releases Wiki Activity

Add item left and right swipe background

This commit is contained in:
Shinokuni 2019-09-17 21:40:49 +02:00
parent 04a73169d7
commit c0ba878d6c
2 changed files with 78 additions and 5 deletions
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4
app/src/main/java/com/readrops/app/activities/MainActivity.java
View File

@ -322,10 +322,12 @@ public class MainActivity extends AppCompatActivity implements SwipeRefreshLayou
recyclerView.setAdapter(adapter);
new ItemTouchHelper(new ReadropsItemTouchCallback(
new ItemTouchHelper(new ReadropsItemTouchCallback(this,
new ReadropsItemTouchCallback.Config.Builder()
.swipeDirs(ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT)
.swipeCallback(this)
.leftDraw(Color.DKGRAY, R.drawable.ic_read_later)
.rightDraw(Color.DKGRAY, R.drawable.ic_read)
.build()))
.attachToRecyclerView(recyclerView);

79
app/src/main/java/com/readrops/app/utils/ReadropsItemTouchCallback.kt
View File

@ -1,9 +1,20 @@
package com.readrops.app.utils
import android.content.Context
import android.graphics.Canvas
import android.graphics.drawable.ColorDrawable
import android.graphics.drawable.Drawable
import android.view.View
import androidx.annotation.ColorInt
import androidx.annotation.DrawableRes
import androidx.core.content.ContextCompat
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.RecyclerView
import kotlin.math.abs
class ReadropsItemTouchCallback(private val config: Config) : ItemTouchHelper.SimpleCallback(config.dragDirs, config.swipeDirs) {
class ReadropsItemTouchCallback(private val context: Context, private val config: Config) : ItemTouchHelper.SimpleCallback(config.dragDirs, config.swipeDirs) {
private val iconHorizontalMargin = 40
override fun onMove(recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, target: RecyclerView.ViewHolder): Boolean {
config.moveCallback?.onMove()
@ -14,6 +25,53 @@ class ReadropsItemTouchCallback(private val config: Config) : ItemTouchHelper.Si
config.swipeCallback?.onSwipe(viewHolder, direction)
}
override fun onChildDraw(c: Canvas, recyclerView: RecyclerView, viewHolder: RecyclerView.ViewHolder, dX: Float, dY: Float, actionState: Int, isCurrentlyActive: Boolean) {
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
val background: ColorDrawable
var icon: Drawable? = null
val itemView: View = viewHolder.itemView
var draw = true // variable used to draw under some conditions
// do not draw anymore if the view has reached the screen's left/right side
if (abs(dX).toInt() == itemView.right) {
draw = false
} else if (abs(dX).toInt() == 0) {
draw = true
}
// left swipe
if (dX > 0 && config.leftDraw != null && draw) {
background = ColorDrawable(config.leftDraw.bgColor)
background.setBounds(itemView.left, itemView.top, dX.toInt(), itemView.bottom)
icon = ContextCompat.getDrawable(context, config.leftDraw.icon)!!
val iconMargin = (itemView.height - icon.intrinsicHeight) / 2
icon.setBounds(itemView.left + iconHorizontalMargin, itemView.top + iconMargin,
itemView.left + iconHorizontalMargin + icon.intrinsicWidth, itemView.bottom - iconMargin)
// right swipe
} else if (dX < 0 && config.rightDraw != null && draw) {
background = ColorDrawable(config.rightDraw.bgColor)
background.setBounds(itemView.right + dX.toInt(), itemView.top, itemView.right, itemView.bottom)
icon = ContextCompat.getDrawable(context, config.rightDraw.icon)!!
val iconMargin = (itemView.height - icon.intrinsicHeight) / 2
icon.setBounds(itemView.right - iconHorizontalMargin - icon.intrinsicWidth, itemView.top + iconMargin,
itemView.right - iconHorizontalMargin, itemView.bottom - iconMargin)
} else {
background = ColorDrawable()
}
background.draw(c)
if (dX > 0)
c.clipRect(itemView.left, itemView.top, dX.toInt(), itemView.bottom)
else if (dX < 0)
c.clipRect(itemView.right + dX.toInt(), itemView.top, itemView.right, itemView.bottom)
icon?.draw(c)
}
override fun isItemViewSwipeEnabled(): Boolean {
return config.swipeCallback != null
}
@ -30,10 +88,13 @@ class ReadropsItemTouchCallback(private val config: Config) : ItemTouchHelper.Si
fun onSwipe(viewHolder: RecyclerView.ViewHolder, direction: Int)
}
class Config(val dragDirs: Int = 0, val swipeDirs: Int = 0, val moveCallback: MoveCallback? = null,
val swipeCallback: SwipeCallback? = null) {
class SwipeDraw(@ColorInt val bgColor: Int, @DrawableRes val icon: Int)
private constructor(builder: Builder) : this(builder.dragDirs, builder.swipeDirs, builder.moveCallback, builder.swipeCallback)
class Config(val dragDirs: Int = 0, val swipeDirs: Int = 0, val moveCallback: MoveCallback? = null,
val swipeCallback: SwipeCallback? = null, val leftDraw: SwipeDraw? = null, val rightDraw: SwipeDraw? = null) {
private constructor(builder: Builder) : this(builder.dragDirs, builder.swipeDirs,
builder.moveCallback, builder.swipeCallback, builder.leftDraw, builder.rightDraw)
class Builder {
var dragDirs: Int = 0
@ -48,6 +109,12 @@ class ReadropsItemTouchCallback(private val config: Config) : ItemTouchHelper.Si
var swipeCallback: SwipeCallback? = null
private set
var leftDraw: SwipeDraw? = null
private set
var rightDraw: SwipeDraw? = null
private set
fun dragDirs(dragDirs: Int) = apply { this.dragDirs = dragDirs }
fun swipeDirs(swipeDirs: Int) = apply { this.swipeDirs = swipeDirs }
@ -56,6 +123,10 @@ class ReadropsItemTouchCallback(private val config: Config) : ItemTouchHelper.Si
fun swipeCallback(swipeCallback: SwipeCallback) = apply { this.swipeCallback = swipeCallback }
fun leftDraw(@ColorInt bgColor: Int, @DrawableRes icon: Int) = apply { this.leftDraw = SwipeDraw(bgColor, icon) }
fun rightDraw(@ColorInt bgColor: Int, @DrawableRes icon: Int) = apply { this.rightDraw = SwipeDraw(bgColor, icon) }
fun build(): Config {
return Config(this)
}