On Jul 16, 2008, at 3:22 PM, Michael Hanna wrote:
I'm using observeValueForKeyPath:ofObject:change:context: to detect when a change occurs in my data model. When a non-leaf node gets added, the outline view draws the new item, but in an unexpanded state. I try this code:[m_rulesOutlineView noteNumberOfRowsChanged]; // expand all items in outline view int c; for (c = 0; c < [m_rulesOutlineView numberOfRows]; c++) { id item = [m_rulesOutlineView itemAtRow:c]; [m_rulesOutlineView expandItem:item]; [m_rulesOutlineView setNeedsDisplayInRect:[m_rulesOutlineView rectOfRow:c]]; } in order to expand the new item. The new item expands(i.e. the triangle points downward) but the leaf nodes aren't actually drawn. The user has to undisclose, then disclose the new triangle in order to see the children.
I don't know if that causes your problem but you should know that - numberOfRows: grows as you expand items. The most simple way to get around implications that are caused by this behaviour this is going through the items in reverse order like this:
for (c = [m_rulesOutlineView numberOfRows] - 1; c >= ; c--)
{
// expand items here
}
That way you will avoid looking at rows that have been created as a
result of expanding an item.
Also, I don't think that you have to call -setNeedsDisplayInRect: on the items, that's something NSOutlineView should be managing.
Markus -- __________________________________________ Markus Spoettl
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