How to change cba buttons dynamically

[Nokia_Archive]

Hi all,

I have to do an application which needs to change cba buttons dynamically.
That is, at the beginning the app starts with only one button available in the cba ('Start' for instance); when this button is pressed, some things are showed in the view and some more buttons have to be showed in the cba implementing the operation to be performed on that view.
In general what I would like to know is how it is possible to update dynamically the cba buttons from a CCoeControl according to what is showed in the application area.

Do you have any idea of how to do it?

Any suggestion would be really appreciated. Thanks in advance.

Posted by Michele Boccaccio, soluzioni@comunicandospa.com
on January 29, 2002 at 11:51

[Nokia_Archive]

Posted by Andy Taylor, andyt@endtoend.co.uk
on January 29, 2002 at 12:01



Hi Michele

Get a pointer to the Cba container then use SetCommandL() as follows:-

CEikButtonGroupContainer * pCbaGroup = CEikButtonGroupContainer::Current();

pCbaGroup->SetCommandL(0, EJobStatus0,_L("Accept"));

If you use this in Your HandleComandL() then you can change the Label when
the button is pressed.

Hope this helps

Andy T

[Orange_LEE]

I try to test your method, however, I met some trouble when using the class CEikButtonGroupContainer

I just use the code in HandleCommandL(), but I cannot build my app successfully,
the VC6 compiler told me:
****************************************************
Generating Code...
Doing first-stage link by name
link.exe @C:\TEMP\nma00092.
Creating library \Symbian\6.0\NokiaCPP\EPOC32\BUILD\SYMBIAN\6.0\NOKIACPP\EPOC32EX\CRYSTALUI\MYAPPTEST\MYAPPTEST\WINS\UDEB\MYAPPTEST.lib and object \Symbian\6.0\NokiaCPP\EPOC32\BUILD\SYMBIAN\6.0\NOKIACPP\EPOC32EX\CRYSTALUI\MYAPPTEST\MYAPPTEST\WINS
\UDEB\MYAPPTEST.exp
MYAPPTESTAPPUI.obj : error LNK2001: unresolved external symbol "public: static class CEikButtonGroupContainer * __cdecl CEikButtonGroupContainer::Current(void)" (?Current@CEikButtonGroupContainer@@SAPAV1@XZ)
\Symbian\6.0\NokiaCPP\EPOC32\BUILD\SYMBIAN\6.0\NOKIACPP\EPOC32EX\CRYSTALUI\MYAPPTEST\MYAPPTEST\WINS\UDEB\MYAPPTEST.APP : fatal error LNK1120: 1 unresolved externals
NMAKE : fatal error U1077: 'link.exe' : return code '0x460'
Stop.
if exist "\Symbian\6.0\NokiaCPP\EPOC32\BUILD\SYMBIAN\6.0\NOKIACPP\EPOC32EX\CRYSTALUI\MYAPPTEST\MYAPPTEST\WINS\UDEB\MYAPPTEST.exp" del "\Symbian\6.0\NokiaCPP\EPOC32\BUILD\SYMBIAN\6.0\NOKIACPP\EPOC32EX\CRYSTALUI\MYAPPTEST\MYAPPTEST\WINS\UDEB\MYAPPTES
T.exp"
Stopped the build by removing the export object,
if present, because the pre-link stage failed
Linking...
LINK : fatal error LNK1104: cannot open file "\Symbian\6.0\NokiaCPP\EPOC32\BUILD\SYMBIAN\6.0\NOKIACPP\EPOC32EX\CRYSTALUI\MYAPPTEST\MYAPPTEST\WINS\UDEB\MYAPPTEST.exp"
Error executing link.exe.

MYAPPTEST.APP - 4 error(s), 0 warning(s)
****************************************************

I just don't know why??

[symbianyucca]

in case you would have used the search box provided in this forum, you propably would have find the answer already, but for one more time:

the "unresolved external "error means that you have used a class (or function ) in your applications that can be found from the header files included, but the physical implementation of it can not be found.

To fix it, find the library where the class/function is implemented and add it to your mmp file, and Re-build the Work Space.

yucca

[Orange_LEE]

Thanks yucca,

I fixed the problem...