Re: Convention for creating dynamic HII forms

[dgurjar@codeaurora.org]

On 2017-05-11 00:53, Dong, Eric wrote:
> Hi Dev,
> 
> I add my comments below.
> 
> Thanks,
> Eric
> 
> -----Original Message-----
> From: edk2-devel [mailto:edk2-devel-bounces@lists.01.org] On Behalf Of
> dgurjar@codeaurora.org
> Sent: Thursday, May 11, 2017 4:39 AM
> To: edk2-devel@lists.01.org
> Subject: [edk2] Convention for creating dynamic HII forms
> 
> Hi,
> 
> I was wondering if anyone here could provide some clarification on how
> to create dynamic HII forms.
> 
> Currently I have a Form A with multiple goto statements to Form B.
> When the user clicks a goto, my ConfigCallback function will use the
> QuestionId to get the data to populate Form B with from a UEFI
> variable.
> Form B's values appear to be updated when I use HiiSetBrowserData.
> 
> However, when I do this I notice that after the user modifies Form B,
> the "Configuration Changed" string does not always appear.
> [[Eric]] The "Configuration Changed" flag shows up because the
> question value has been changed. Browser base on the current question
> value and the backup value in the browser to decide whether shows up
> this flag.
> 
> As a result when I try to save the form, there are no calls made to my
> RouteConfig function.
> When I enter Form B the internal question values for that form are not
> updated with the values. Because of this the form doesn't recognize
> when its questions are modified.
> 
> I was wondering if anyone has had experience creating form where the
> internal question values need to be modified on entry, and what the
> common convention was for doing this.
> [[Eric]] edkii has a sample driver in
> MdeModulePkg/Universal/DriverSampleDxe, you can reference that driver.
> If this driver don't has the case you said, you can provide a patch
> for this code, and we can base on the code to find the error place.
> 
> Thanks,
> Dev
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Hi Eric,

Thanks for the response. I've taken a look at DriverSampleDxe in the 
past to get an understanding of Hii forms, From what I can tell I don't 
think there is a form present there that does what I'm asking for. Any 
chance you can point me to a line number or location in that driver that 
you think does what I'm trying to do correctly?

-Dev