Re: [wxperl-users] weird Wx::DatePickerCtrl loading, where to find constant wxDefaultDateTime?

[Mark D. <mar...@zn...>]

Hi,

The particular constant 'wxDefaultDateTime' does not appear to be exported.

Even if wxDefaultDateTime were exported, if you used it in the
constructor of your Wx::DatePickerCtrl, the date would be set to the
current date. (Well, as it isn't exported this can't be tested, but so
the docs say).

On wxMSW, if you use the wxDP_ALLOWNONE flag and have the control
apparantly toggled 'off', ->GetValue() still returns the date value from
the control. This is a wxWidgets 'feature' rather than anything to do
with wxPerl I think.

It seems to me that you'll get the most satisfactory interface if you
use a separate check box you can actually check the state of to enable /
disable a dropdown DatePickerCtrl. Use 'Wx::DateTime->new()' instead of
 wxDefaultDateTime in the constructor to get 'today' as an initial value.

I assume you were just asking about the specific constant
wxDefaultDateTime, but for anyone interested - for general examples on
how to use controls, load constants, where you need to 'use
Wx::SomethingElse' etc.  are you aware of the wxDemo ?

http://search.cpan.org/~mbarbon/Wx-Demo-0.02/

Browsing the module code of the demo is currently the best 'reference'
available I think.

To find out which constants are actually exported by wxPerl, you can
check the text of the Wx_Exp.pm module in your Wx installation.

A tip on the DateTime stuff in general - choose from the vast array of
Date Time modules on CPAN for any of your date operations or
calculations - just use the wxWidgets stuff for display. I often get
carried away using wxWidgets functions just because they are in the
toolkit when really there are much better solutions on CPAN.

Best Regards

Mark



Edward Heil wrote:
> Hullo --
> 
> We've been using our own hand-rolled datepicker control, which pulls up 
> a dialog with a Wx::Calendar on it.
> 
> Just the thing to replace with a Wx::DatePickerCtrl now that the real 
> Wx::DatePickerCtrl is available!
> 
> So I've been trying to press Wx::DatePickerCtrl into service.  I've been 
> having some problems.
> 
> First off, I can't 'use Wx::DatePickerCtrl' -- though if I 'use 
> Wx::Calendar' I get  Wx::DatePickerCtrl loaded as a side effect.  This 
> is pretty counterintuitive.
> 
> I also am not able to subclass it (use base 
> qw(Wx::DatePickerCtrl))without doing a 'use Wx::Calendar' first to get 
> Wx::DatePickerCtrl loaded, which also took me quite a while to figure out.
> 
> (Actually I just figured those two out while writing this message, while 
> trying to put together a tiny app to demonstrate the problems I was 
> having with it.)
> 
> The one problem I still haven't been able to figure out is how to import 
> the constant wxDefaultDateTime so I can test whether the datepicker has 
> a null date (having passed it the style DP_ALLOWNONE).  Where is that 
> constant exported from?  How can I get to it?
> 
> sorry for this stream-of-consciousness-like email.  I've been wrestling 
> with this stuff with a sleep deficit, which has probably made me a 
> little stupider about it than I might have been.  If I've been unclear 
> on anything let me know.
> 
> Versions involved:  wxPerl 0.57 on OS X. built with wxWidgets 2.6.3.
> 
> Any insight on the wxDateTime constant?
> 
> Thanks very much,
> 
> Ed Heil
> 
> 
> 
> 
> 
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