minimize flicker when applying templated transaction too

[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / ui / new_transaction / NewTransactionModel.java

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/new_transaction/NewTransactionModel.java b/app/src/main/java/net/ktnx/mobileledger/ui/new_transaction/NewTransactionModel.java
index 36b457ff4bf76bc1c0973a1db085196c2f3ee4e3..7333561c5b52f129a77fe0eefb03de50a2d2c002 100644 (file)
--- a/app/src/main/java/net/ktnx/mobileledger/ui/new_transaction/NewTransactionModel.java
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/new_transaction/NewTransactionModel.java
@@ -92,6 +92,24 @@ public class NewTransactionModel extends ViewModel {
         checkTransactionSubmittable(newList);
         setItemsWithoutSubmittableChecks(newList);
     }
+    private void replaceItems(@NonNull List<Item> newList) {
+        renumberItems();
+
+        setItems(newList);
+    }
+    /**
+     * make old items replaceable in-place. makes the new values visually blend in
+     */
+    private void renumberItems() {
+        final List<Item> list = items.getValue();
+        if (list == null) {
+            return;
+        }
+
+        int id = 0;
+        for (Item item : list)
+            item.id = id++;
+    }
     private void setItemsWithoutSubmittableChecks(@NonNull List<Item> list) {
         final int cnt = list.size();
         for (int i = 1; i < cnt - 1; i++) {
@@ -175,6 +193,7 @@ public class NewTransactionModel extends ViewModel {
         list.add(new TransactionAccount(""));
         list.add(new TransactionAccount(""));
         noteFocusChanged(0, FocusedElement.Description);
+        renumberItems();
         isSubmittable.setValue(false);
         setItemsWithoutSubmittableChecks(list);
     }
@@ -241,6 +260,7 @@ public class NewTransactionModel extends ViewModel {
         if (Misc.emptyIsNull(transactionComment) != null)
             head.setComment(transactionComment);
 
+        Item.resetIdDispenser();
         List<Item> newItems = new ArrayList<>();
 
         newItems.add(head);
@@ -280,7 +300,7 @@ public class NewTransactionModel extends ViewModel {
                   newItems.add(accRow);
               }
 
-              new Handler(Looper.getMainLooper()).post(() -> setItems(newItems));
+              new Handler(Looper.getMainLooper()).post(() -> replaceItems(newItems));
           });
     }
     private int extractIntFromMatches(MatchResult m, Integer group, Integer literal) {
@@ -865,7 +885,7 @@ public class NewTransactionModel extends ViewModel {
 
     static abstract class Item {
         private static int idDispenser = 0;
-        protected final int id;
+        protected int id;
         private Item() {
             if (this instanceof TransactionHead)
                 id = 0;