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Adds swipe to delete monsters on the library screen.

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This commit is contained in:
Tom Hicks
2021-05-01 00:48:17 -07:00
parent 1cf9ae73d7
commit 8a0b955dbe
6 changed files with 109 additions and 1 deletions
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6
app/src/main/java/com/majinnaibu/monstercards/ui/MonsterListRecyclerViewAdapter.java
View File

@@ -110,4 +110,10 @@ public class MonsterListRecyclerViewAdapter extends RecyclerView.Adapter<Monster
}
}
public void deleteItem(int position) {
if (mOnDelete != null) {
Monster monster = mValues.get(position);
mOnDelete.onItem(monster);
}
}
}

73
app/src/main/java/com/majinnaibu/monstercards/ui/library/LibraryFragment.java
View File

@@ -1,13 +1,22 @@
package com.majinnaibu.monstercards.ui.library;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.annotation.NonNull;
import androidx.core.content.ContextCompat;
import androidx.navigation.NavDirections;
import androidx.navigation.Navigation;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
@@ -71,10 +80,19 @@ public class LibraryFragment extends MCFragment {
this,
repository.getMonsters(),
(monster) -> {
repository
.deleteMonster(monster)
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(() -> {
Logger.logDebug("deleted");
}, Logger::logError);
},
mTwoPane);
recyclerView.setAdapter(adapter);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
ItemTouchHelper itemTouchHelper = new ItemTouchHelper(new SwipeToDeleteMonsterCallback(adapter));
itemTouchHelper.attachToRecyclerView(recyclerView);
}
protected void navigateToMonsterDetail(UUID monsterId) {
@@ -82,5 +100,60 @@ public class LibraryFragment extends MCFragment {
Navigation.findNavController(getView()).navigate(action);
}
public static class SwipeToDeleteMonsterCallback extends ItemTouchHelper.SimpleCallback {
private final MonsterListRecyclerViewAdapter mAdapter;
private final Drawable icon;
private final ColorDrawable background;
private final Paint clearPaint;
public SwipeToDeleteMonsterCallback(MonsterListRecyclerViewAdapter adapter) {
super(0, ItemTouchHelper.LEFT);
mAdapter = adapter;
icon = ContextCompat.getDrawable(mAdapter.getContext(), R.drawable.ic_delete_white_36);
background = new ColorDrawable(Color.RED);
clearPaint = new Paint();
clearPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
}
@Override
public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder target) {
return false;
}
@Override
public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
int position = viewHolder.getAdapterPosition();
mAdapter.deleteItem(position);
}
@Override
public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
View itemView = viewHolder.itemView;
int itemHeight = itemView.getBottom() - itemView.getTop();
boolean isCancelled = dX == 0 && !isCurrentlyActive;
if (isCancelled) {
c.drawRect(itemView.getRight() + dX, itemView.getTop(), itemView.getRight(), itemView.getBottom(), clearPaint);
return;
}
// Draw the red delete background
background.setBounds(itemView.getRight() + (int) dX, itemView.getTop(), itemView.getRight(), itemView.getBottom());
background.draw(c);
// Calculate position of delete icon
int iconHeight = icon.getIntrinsicHeight();
int iconWidth = icon.getIntrinsicWidth();
int iconTop = itemView.getTop() + (itemHeight - iconHeight) / 2;
int iconMargin = (itemHeight - iconHeight) / 2;
int iconLeft = itemView.getRight() - iconMargin - iconWidth;
int iconRight = itemView.getRight() - iconMargin;
int iconBottom = iconTop + iconHeight;
// Draw the icon
icon.setBounds(iconLeft, iconTop, iconRight, iconBottom);
icon.draw(c);
super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
}
}
}