[Gambas-user] What are circular references, and how to avoid?

[Jaap Cramer]

Hi

I discovered some. But when I search for ToolPanelContainer, FExpander, ToolPanel, Expander, I cant find them. I never use those words, so how can I have made a circular reference? And FExpander isn't even the name of a control I made...

BTW, how bad is a circular reference?

tnx in advance :-)
Jaap

----------------------------------------
> Date: Tue, 22 Jan 2008 12:18:24 +0100
> From: eilert-sprachen at ...221...
> To: gambas-user at lists.sourceforge.net
> Subject: Re: [Gambas-user] What are circular references, and how to avoid?
> 
> Jaap Cramer schrieb:
>> Hi
>> 
>> I have a question. I Got, after exiting a fine working project this message in console:
>> 
>> WARNING: circular references detected
>> FToolBar (3)
>> FHistory (1)
>> FBible (1)
>> FOptions (1)
>> FLoad (1)
>> ToolPanelContainer (3)
>> FExpander (1)
>> ToolPanel (1)
>> Expander (1)
>> WARNING: 251 allocation(s) non freed.
>> 
>> What is it
>> how serious is this :-)
>> and how do I avoid it?
>> 
>> Jaap
>> 
> 
> 
> When you've got two SUBs with events which call each other, i. e. event 
> SUB A calls SUB B which triggers an event that calls SUB A and so on.
> 
> Or if you've got two SUBs with variables that influence each other, i. 
> e. variable A affects variable B which affects variable A which affects 
> variable B....
> 
> Take a look at your program code if there's something of this kind. 
> Sometimes it's pretty difficult to find because you just don't expect 
> the thing to live at that place... I often do not know that changing a 
> certain property in an object will call a certain event, and sometimes I 
> forgot I already added some code to this event (to do something 
> completely else) which in turn now changes the property ;-) Sometimes it 
> helps to watch the program step by step, a real eye-opener!
> 
> Rolf
> 
> 
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