Package structure: moved UI utils

Part of #963.
2022-01-15 22:32:32 +01:00
parent 7caf33fb66
commit 7484ab03ce
23 changed files with 23 additions and 24 deletions
@@ -0,0 +1,88 @@
+package de.dennisguse.opentracks.ui.util;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.PorterDuffXfermode;
+import android.graphics.drawable.ColorDrawable;
+import android.graphics.drawable.Drawable;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.core.content.ContextCompat;
+import androidx.recyclerview.widget.ItemTouchHelper;
+import androidx.recyclerview.widget.RecyclerView;
+
+import de.dennisguse.opentracks.R;
+
+abstract public class RecyclerViewSwipeDeleteCallback extends ItemTouchHelper.Callback {
+
+    private final Paint clearPaint;
+    private final ColorDrawable background;
+    private final int backgroundColor;
+    private final Drawable deleteDrawable;
+    private final int intrinsicWidth;
+    private final int intrinsicHeight;
+
+    public RecyclerViewSwipeDeleteCallback(Context context) {
+        background = new ColorDrawable();
+        backgroundColor = context.getResources().getColor(R.color.colorBackgroundDelete);
+        clearPaint = new Paint();
+        clearPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
+        deleteDrawable = ContextCompat.getDrawable(context, R.drawable.ic_delete_forever_24dp);
+        deleteDrawable.setTint(context.getResources().getColor(R.color.colorForegroundDelete));
+        intrinsicWidth = deleteDrawable.getIntrinsicWidth();
+        intrinsicHeight = deleteDrawable.getIntrinsicHeight();
+    }
+
+    @Override
+    public int getMovementFlags(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder) {
+        return makeMovementFlags(0, ItemTouchHelper.LEFT);
+    }
+
+    @Override
+    public boolean onMove(@NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, @NonNull RecyclerView.ViewHolder viewHolder1) {
+        return false;
+    }
+
+    @Override
+    public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView, @NonNull RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
+        super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
+
+        View itemView = viewHolder.itemView;
+        int itemHeight = itemView.getHeight();
+
+        boolean isCancelled = dX == 0 && !isCurrentlyActive;
+
+        if (isCancelled) {
+            clearCanvas(c, itemView.getRight() + dX, (float) itemView.getTop(), (float) itemView.getRight(), (float) itemView.getBottom());
+            super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
+            return;
+        }
+
+        background.setColor(backgroundColor);
+        background.setBounds(itemView.getRight() + (int) dX, itemView.getTop(), itemView.getRight(), itemView.getBottom());
+        background.draw(c);
+
+        int deleteIconTop = itemView.getTop() + (itemHeight - intrinsicHeight) / 2;
+        int deleteIconMargin = (itemHeight - intrinsicHeight) / 2;
+        int deleteIconLeft = itemView.getRight() - deleteIconMargin - intrinsicWidth;
+        int deleteIconRight = itemView.getRight() - deleteIconMargin;
+        int deleteIconBottom = deleteIconTop + intrinsicHeight;
+
+        deleteDrawable.setBounds(deleteIconLeft, deleteIconTop, deleteIconRight, deleteIconBottom);
+        deleteDrawable.draw(c);
+
+        super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
+    }
+
+    private void clearCanvas(Canvas c, Float left, Float top, Float right, Float bottom) {
+        c.drawRect(left, top, right, bottom, clearPaint);
+    }
+
+    @Override
+    public float getSwipeThreshold(@NonNull RecyclerView.ViewHolder viewHolder) {
+        return 0.7f;
+    }
+}