Reusing notebook pages?

[Rob Gayvert]

Steven Swerling wrote:

> Cees de Groot wrote:
>
>> Hi,
>>
>> I have a UI with a tree on the left and depending on what's clicked 
>> on the  right, any number of notebook pages with various widgets 
>> depending on the  kind of item clicked on in the tree.
>>
>> At the moment, I send #deleteAllPages to the notebook and recreate  
>> everything with every click on the tree. As I have some items with 
>> fairly  complex UI's and quite a bit of data, this takes too much time.
>>
>> What is a good way to make sure that view creation is done only once 
>> per  different notebook page?
>>
>> (I'm clueless about caching views with wxWindows. All I can come up 
>> with  is to create all notebook pages and selectively hide/display, 
>> but this  seems like a maintenance headache...).
>>
> Will "WxBookCtrl>>#insertPage:page:text:" help? It takes the desired
> page index, the page (panel) to insert, and the tab label for the page.
>  So could you create all your pages at app startup, hold them in a iv,
> then use this call to insert them when they are needed? Or does deleting
> the page from the notebook blast the handle for that page?


As long as you use #removePage: instead of #deletePage: this should 
work.  In WxDemoFrame I'm doing something similar with the codePane. I 
use #removePage: to hide it, then #addPage: to show it again, without 
having to recreate it. However, I did have a lot of trouble with 
flicker.  The #freeze and #thaw methods are supposed to prevent display 
updates, but they didn't seem to work for me.