展开项目时 NSOutlineView 行索引发生变化

发布于 2024-10-16 23:36:02 字数 1378 浏览 5 评论 0原文

假设我有一个 NSTableView（例如，a）和一个 NSOutlineView（例如，b）。

在 a 的数据源中，我试图获取 b 的所有选定项目的父项目。在行号中。 a 的 rowIndex 我想要选择 b 的第 rowIndex 项和我想将此字符串连接到该项目的父项的名称。例如，a：

1 和 1.1
2

和 b：

1
- 1.1（已选择）
2（选定）
3

这是 - (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex of 一个。

NSUInteger index = [[outlineView selectedRowIndexes] firstIndex];

for (NSUInteger i = 0, target = rowIndex; i < target; i++)
    index = [[outlineView selectedRowIndexes] indexGreaterThanIndex:index];

NSLog(@"%@", [outlineView [outlineView itemAtRow:index]]);

if([outlineView parentForItem:[outlineView itemAtRow:index]] != NULL) {
    return [NSString stringWithFormat:@"%@ %@", [outlineView parentForItem:[outlineView itemAtRow:index]], [outlineView itemAtRow:index]]; 
} else {
    return [outlineView itemAtRow:index];
}

return NULL;

问题是，当我展开项目时 [outlineView ParentForItem:[outlineView itemAtRow:index]] 始终返回最后一个展开的项目。

我正在尝试列出所选项目及其父母。当我展开某个项目时，所有项目都将其父项更改为最后展开的项目。

我做错了什么吗？

先感谢您。

原文

Say I have a NSTableView (for example, a) and a NSOutlineView (for example, b).

In the datasource of a I'm trying to get the parent item of all the selected items of b. In the row no. rowIndex of a I would like to have the rowIndexth selected item of b and I would like to concatenate this string to the name of the parent of this item. For example, a:

1 and 1.1
2

And b:

1
- 1.1 (selected)
2 (selected)
3

This is - (id)tableView:(NSTableView *)aTableView objectValueForTableColumn:(NSTableColumn *)aTableColumn row:(NSInteger)rowIndex of a.

NSUInteger index = [[outlineView selectedRowIndexes] firstIndex];

for (NSUInteger i = 0, target = rowIndex; i < target; i++)
    index = [[outlineView selectedRowIndexes] indexGreaterThanIndex:index];

NSLog(@"%@", [outlineView [outlineView itemAtRow:index]]);

if([outlineView parentForItem:[outlineView itemAtRow:index]] != NULL) {
    return [NSString stringWithFormat:@"%@ %@", [outlineView parentForItem:[outlineView itemAtRow:index]], [outlineView itemAtRow:index]]; 
} else {
    return [outlineView itemAtRow:index];
}

return NULL;

The problem is that when I expand an item [outlineView parentForItem:[outlineView itemAtRow:index]] returns always the last expanded item.

I am trying to have a list of selected items and their parents. When I expand an item, all items change their parent to last expanded item.

Am I doing something wrong?

Thank you in advance.

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