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List:       kde-core-devel
Subject:    Re: Sorting date and other column types in {K,Q}ListViews
From:       Carsten Pfeiffer <carpdjih () cetus ! zrz ! tu-berlin ! de>
Date:       2001-12-29 15:57:06
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On Sat, Dec 29, 2001 at 03:31:32PM +0000, shaheed wrote:
 
> Now, this function is clearly common for several types of data, for example:
> 
> - for filenames, where one might want directories sorted ahead of regular 
> files
> 
> - for dates, one wants to sort on the actual date, not its textual 
> representation
> 
> and is needed in several places like Konqueror and Cervisia. At the moment, 
> this is done by different kinds of inconsistent hacks.
> 
> What is the best way to tackle this? Perhaps there should be a standard 
> {K,Q}ListViewItem's subclasses for storing certain data types?

The same is in kfile btw. Usually you reimplement key() in your item-class
and return a suitable QString there. To calculate them, there is

    static QString sortingKey( const QString& value, bool isDir, int sortSpec);
    static QString sortingKey( KIO::filesize_t value, bool isDir,int sortSpec);

in KFileItem. sortSpec can be an ORed combination of QDir::SortSpec items. You 
have to use the filesize_t method for dates as well due to ambiguity with time_t.

Cheers
Carsten Pfeiffer
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