now inserting new shopping cart item at the top, restored shopping cart button animations, fixed undo for zero amount products

Author: ajungg

core/src/main/java/io/snabble/sdk/ShoppingCart.java

@@ -154,7 +154,7 @@ public void setQuantity(Product product, int quantity, ScannableCode scannedCode
 
                 setEntryQuantity(e, quantity);
             } else {
-                add(product, quantity, scannedCode);
+                insert(product, 0, quantity, scannedCode);
             }
         }
     }

ui/src/main/java/io/snabble/sdk/ui/cart/ShoppingCartView.java

@@ -70,7 +70,7 @@ public void onItemAdded(ShoppingCart list, Product product) {
 
         @Override
         public void onQuantityChanged(ShoppingCart list, Product product) {
-            onCartUpdated();
+            
         }
 
         @Override
@@ -214,18 +214,20 @@ public void onSwiped(final RecyclerView.ViewHolder viewHolder, int direction) {
                 final Product product = cart.getProduct(pos);
                 final String scannedCode = cart.getScannedCode(pos);
                 final int quantity = cart.getQuantity(pos);
+                final boolean isZeroAmountProduct = cart.isZeroAmountProduct(pos);
 
                 cart.removeAll(pos);
                 Telemetry.event(Telemetry.Event.DeletedFromCart, product);
                 recyclerView.getAdapter().notifyItemRemoved(pos);
+                update();
 
                 snackbar = UIUtils.snackbar(coordinatorLayout,
                         R.string.Snabble_Shoppingcart_articleRemoved, UIUtils.SNACKBAR_LENGTH_VERY_LONG);
                 snackbar.setAction(R.string.Snabble_undo, new OnClickListener() {
                     @Override
                     public void onClick(View v) {
                         ScannableCode parsedCode = ScannableCode.parse(SnabbleUI.getProject(), scannedCode);
-                        cart.insert(product, pos, quantity, parsedCode);
+                        cart.insert(product, pos, quantity, parsedCode, isZeroAmountProduct);
                         recyclerView.getAdapter().notifyDataSetChanged();
                         Telemetry.event(Telemetry.Event.UndoDeleteFromCart, product);
                     }
@@ -276,12 +278,16 @@ private void updatePayText() {
     }
 
     private void onCartUpdated() {
+        update();
+
+        recyclerViewAdapter.notifyDataSetChanged();
+    }
+
+    private void update() {
         updatePayText();
         updateEmptyState();
         scanForImages();
 
-        recyclerViewAdapter.notifyDataSetChanged();
-
         if (snackbar != null) {
             snackbar.dismiss();
         }
@@ -473,6 +479,7 @@ public void onClick(View v) {
                         }
 
                         recyclerViewAdapter.notifyItemChanged(getAdapterPosition());
+                        update();
                     }
                 });
 
@@ -495,6 +502,7 @@ public void onClick(View v) {
                                                 public void onClick(DialogInterface dialog, int which) {
                                                     cart.removeAll(getAdapterPosition());
                                                     recyclerViewAdapter.notifyItemChanged(getAdapterPosition());
+                                                    update();
                                                     Telemetry.event(Telemetry.Event.DeletedFromCart, product);
                                                 }
                                             })
@@ -511,6 +519,7 @@ public void onClick(DialogInterface dialog, int which) {
                             }
 
                             recyclerViewAdapter.notifyItemChanged(getAdapterPosition());
+                            update();
                         }
                     }
                 });
@@ -521,6 +530,7 @@ public void click() {
                         int pos = getAdapterPosition();
                         cart.setQuantity(pos, getQuantityEditValue());
                         recyclerViewAdapter.notifyItemChanged(pos);
+                        update();
 
                         hideInput();
                     }

ui/src/main/java/io/snabble/sdk/ui/scanner/ProductConfirmationDialog.java

@@ -323,13 +323,13 @@ private void addToCart() {
                 shake();
                 return;
             } else {
-                shoppingCart.add(product, 1, scannedCode, isZeroAmountProduct);
+                shoppingCart.insert(product, 0, 1, scannedCode, isZeroAmountProduct);
             }
         } else if (product.getType() == Product.Type.Article) {
             shoppingCart.setQuantity(product, q, scannedCode);
         } else if(product.getType() == Product.Type.UserWeighed){
             if(q > 0) {
-                shoppingCart.add(product, q, scannedCode);
+                shoppingCart.insert(product, 0, q, scannedCode);
             } else {
                 shake();
                 return;