On Jun 8, 2006, at 1:30 PM, Mike Caveman Lehmann wrote:
hi guys,
I have a single column list-view data browser, and I'm trying to
inactivate some of the items. It seems to me that I should (per item
ID) set the value of kDataBrowserItemIsActiveProperty, but I can't
seem to figure out how to set this property, either because I'm not
looking in the right places or because I'm barking up the wrong tree.
Any hints/advice/boo-urns?
Others have already shown you how to address this, so I just want to
make sure you don't have a misconception about DataBrowser.
DataBrowser is a display widget, nothing more. You need to maintain
all state information about DataBrowser items somewhere outside of
DataBrowser. Then, when DataBrowser needs to draw an item, it can ask
for any information it needs. DataBrowser will cache data, but you
should think of it as cached data, not data storage, which is why the
only way to update what DataBrowser draws is to tell DataBrowser the
item's information needs to be updated.
For example, if you have a list of 500 items and 10 are currently
visible, and you tell DataBrowser that all items need to be updated
in one column, DataBrowser will ask for the current information as it
redraws the 10 visible items, but it will leave the other 490 items
marked as needing to be updated if and when they need to be drawn. If
you scroll the list later, DataBrowser will request the current
information for the newly visible items.
Larry
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