kunfei
5 years ago
parent
1afb68b233
commit
07d4fa66b6
@ -1,34 +0,0 @@ |
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package io.legado.app.help |
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import androidx.recyclerview.widget.ListUpdateCallback |
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import androidx.recyclerview.widget.RecyclerView |
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import io.legado.app.base.adapter.ItemViewHolder |
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class FirstTopListUpCallback : ListUpdateCallback { |
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var firstInsert = -1 |
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lateinit var adapter: RecyclerView.Adapter<ItemViewHolder> |
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override fun onChanged(position: Int, count: Int, payload: Any?) { |
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adapter.notifyItemRangeChanged(position, count, payload) |
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} |
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override fun onMoved(fromPosition: Int, toPosition: Int) { |
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if (toPosition == 0) { |
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firstInsert = 0 |
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} |
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adapter.notifyItemMoved(fromPosition, toPosition) |
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} |
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override fun onInserted(position: Int, count: Int) { |
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if (firstInsert == -1 || firstInsert > position) { |
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firstInsert = position |
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} |
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adapter.notifyItemRangeInserted(position, count) |
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} |
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override fun onRemoved(position: Int, count: Int) { |
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adapter.notifyItemRangeRemoved(position, count) |
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} |
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} |
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@ -0,0 +1,159 @@ |
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package io.legado.app.ui.widget.recycler |
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import android.content.Context |
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import android.graphics.Canvas |
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import android.graphics.Rect |
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import android.graphics.drawable.Drawable |
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import android.util.Log |
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import android.view.View |
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import android.widget.LinearLayout |
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import androidx.recyclerview.widget.RecyclerView |
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/** |
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* 不画最后一条分隔线 |
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*/ |
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class DividerNoLast(context: Context, orientation: Int) : |
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RecyclerView.ItemDecoration() { |
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companion object { |
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const val HORIZONTAL = LinearLayout.HORIZONTAL |
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const val VERTICAL = LinearLayout.VERTICAL |
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} |
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private val tag = "DividerItem" |
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private val attrs = intArrayOf(android.R.attr.listDivider) |
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private var mDivider: Drawable? = null |
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/** |
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* Current orientation. Either [.HORIZONTAL] or [.VERTICAL]. |
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*/ |
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private var mOrientation = 0 |
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private val mBounds = Rect() |
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init { |
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val a = context.obtainStyledAttributes(attrs) |
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mDivider = a.getDrawable(0) |
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if (mDivider == null) { |
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Log.w( |
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tag, "@android:attr/listDivider was not set in the theme used for this " |
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+ "DividerItemDecoration. Please set that attribute all call setDrawable()" |
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) |
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} |
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a.recycle() |
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setOrientation(orientation) |
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} |
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/** |
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* Sets the orientation for this divider. This should be called if |
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* [RecyclerView.LayoutManager] changes orientation. |
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* |
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* @param orientation [.HORIZONTAL] or [.VERTICAL] |
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*/ |
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fun setOrientation(orientation: Int) { |
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require(!(orientation != HORIZONTAL && orientation != VERTICAL)) { "Invalid orientation. It should be either HORIZONTAL or VERTICAL" } |
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mOrientation = orientation |
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} |
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/** |
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* Sets the [Drawable] for this divider. |
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* |
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* @param drawable Drawable that should be used as a divider. |
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*/ |
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fun setDrawable(drawable: Drawable) { |
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requireNotNull(drawable) { "Drawable cannot be null." } |
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mDivider = drawable |
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} |
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/** |
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* @return the [Drawable] for this divider. |
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*/ |
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fun getDrawable(): Drawable? { |
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return mDivider |
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} |
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override fun onDraw(c: Canvas, parent: RecyclerView, state: RecyclerView.State) { |
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if (parent.layoutManager == null || mDivider == null) { |
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return |
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} |
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if (mOrientation == VERTICAL) { |
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drawVertical(c, parent) |
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} else { |
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drawHorizontal(c, parent) |
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} |
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} |
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private fun drawVertical( |
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canvas: Canvas, |
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parent: RecyclerView |
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) { |
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canvas.save() |
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val left: Int |
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val right: Int |
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if (parent.clipToPadding) { |
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left = parent.paddingLeft |
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right = parent.width - parent.paddingRight |
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canvas.clipRect( |
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left, parent.paddingTop, right, |
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parent.height - parent.paddingBottom |
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) |
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} else { |
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left = 0 |
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right = parent.width |
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} |
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val childCount = parent.childCount |
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for (i in 0 until childCount - 1) { |
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val child = parent.getChildAt(i) |
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parent.getDecoratedBoundsWithMargins(child, mBounds) |
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val bottom = mBounds.bottom + Math.round(child.translationY) |
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val top = bottom - mDivider!!.intrinsicHeight |
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mDivider!!.setBounds(left, top, right, bottom) |
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mDivider!!.draw(canvas) |
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} |
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canvas.restore() |
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} |
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private fun drawHorizontal(canvas: Canvas, parent: RecyclerView) { |
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canvas.save() |
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val top: Int |
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val bottom: Int |
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if (parent.clipToPadding) { |
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top = parent.paddingTop |
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bottom = parent.height - parent.paddingBottom |
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canvas.clipRect( |
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parent.paddingLeft, top, |
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parent.width - parent.paddingRight, bottom |
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) |
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} else { |
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top = 0 |
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bottom = parent.height |
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} |
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val childCount = parent.childCount |
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for (i in 0 until childCount - 1) { |
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val child = parent.getChildAt(i) |
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parent.layoutManager!!.getDecoratedBoundsWithMargins(child, mBounds) |
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val right = mBounds.right + Math.round(child.translationX) |
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val left = right - mDivider!!.intrinsicWidth |
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mDivider!!.setBounds(left, top, right, bottom) |
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mDivider!!.draw(canvas) |
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} |
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canvas.restore() |
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} |
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override fun getItemOffsets( |
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outRect: Rect, view: View, parent: RecyclerView, |
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state: RecyclerView.State |
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) { |
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if (mDivider == null) { |
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outRect[0, 0, 0] = 0 |
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return |
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} |
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if (mOrientation == VERTICAL) { |
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outRect[0, 0, 0] = mDivider!!.intrinsicHeight |
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} else { |
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outRect[0, 0, mDivider!!.intrinsicWidth] = 0 |
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} |
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} |
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} |
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@ -1,15 +1,16 @@ |
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package io.legado.app.utils |
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package io.legado.app.ui.widget.recycler |
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import android.content.Context |
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import androidx.core.content.ContextCompat |
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import androidx.recyclerview.widget.DividerItemDecoration |
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import androidx.recyclerview.widget.RecyclerView |
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import io.legado.app.R |
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class VerticalDivider(context: Context) : DividerItemDecoration(context, VERTICAL) { |
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fun RecyclerView.getVerticalDivider(): DividerItemDecoration { |
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return DividerItemDecoration(context, DividerItemDecoration.VERTICAL).apply { |
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init { |
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ContextCompat.getDrawable(context, R.drawable.ic_divider)?.let { |
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this.setDrawable(it) |
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} |
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} |
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} |
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