Merge pull request jverkoey#306 from francisli/submissions

Adds support for row re-ordering in NIMutableTableViewModel
lts1610 · Nov 13, 2012 · 00c6151 · 00c6151
2 parents de89bec + 35bb647
commit 00c6151
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diff --git a/src/models/src/NIMutableTableViewModel.h b/src/models/src/NIMutableTableViewModel.h
@@ -37,6 +37,29 @@
            atIndexPath:(NSIndexPath *)indexPath
            inTableView:(UITableView *)tableView;
 
+/**
+ * Asks the receiver whether the object at the given index path should be moveable.
+ *
+ * If this method is not implemented, the default response is assumed to be NO.
+ */
+- (BOOL)tableViewModel:(NIMutableTableViewModel *)tableViewModel
+         canMoveObject:(id)object
+           atIndexPath:(NSIndexPath *)indexPath
+           inTableView:(UITableView *)tableView;
+
+/**
+ * Asks the receiver whether the given object should be moved.
+ *
+ * If this method is not implemented, the default response is assumed to be YES.
+ *
+ * Returning NO will stop the model from handling the move logic.
+ */
+- (BOOL)tableViewModel:(NIMutableTableViewModel *)tableViewModel
+      shouldMoveObject:(id)object
+           atIndexPath:(NSIndexPath *)indexPath
+           toIndexPath:(NSIndexPath *)toIndexPath
+           inTableView:(UITableView *)tableView;
+
 /**
  * Asks the receiver what animation should be used when deleting the object at the given index path.
  *

diff --git a/src/models/src/NIMutableTableViewModel.m b/src/models/src/NIMutableTableViewModel.m
@@ -185,6 +185,32 @@ - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEd
   }
 }
 
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath {
+    if ([self.delegate respondsToSelector:@selector(tableViewModel:canMoveObject:atIndexPath:inTableView:)]) {
+        id object = [self objectAtIndexPath:indexPath];
+        return [self.delegate tableViewModel:self canMoveObject:object atIndexPath:indexPath inTableView:tableView];
+    } else {
+        return NO;
+    }
+}
+
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath {
+    id object = [self objectAtIndexPath:sourceIndexPath];
+    BOOL shouldMove = YES;
+    if ([self.delegate respondsToSelector:@selector(tableViewModel:shouldMoveObject:atIndexPath:toIndexPath:inTableView:)]) {
+        shouldMove = [self.delegate tableViewModel:self shouldMoveObject:object atIndexPath:sourceIndexPath toIndexPath:destinationIndexPath inTableView:tableView];
+    }
+    if (shouldMove) {
+        id object = [self objectAtIndexPath:sourceIndexPath];
+        [self removeObjectAtIndexPath:sourceIndexPath];
+        [self insertObject:object atRow:destinationIndexPath.row inSection:destinationIndexPath.section];
+    }
+}
+
 @end