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Re: ColumnList question (sort column) [message #2913 is a reply to message #2898]

Sat, 29 April 2006 22:58

mirek
Messages: 14271
Registered: November 2005

Ultimate Member

forlano wrote on Sat, 29 April 2006 05:32

Hello,

I have put my data in a columnlist widget and I would like to see them sorted alphabetically (it does not matter if during the insertion or at the end). The syntax to do it is:

Sort(const ValueOrder& order)

but I was unable fo find an example that shows how to set this argument.

Thank you,
Luigi

[/code]
struct ValueOrder {
virtual bool operator()(const Value& a, const Value& b) const = 0;
};

struct StdValueOrder : ValueOrder {
int language;

virtual bool operator()(const Value& a, const Value& b) const;

StdValueOrder(int l = -1);
virtual ~StdValueOrder();
};

struct FnValueOrder : ValueOrder {
int (*fn)(const Value& a, const Value& b);

virtual bool operator()(const Value& a, const Value& b) const;

FnValueOrder(int (*fn)(const Value& a, const Value& b));
virtual ~FnValueOrder();
};
[/code]

Use "StdValueOrder()" in place of ValueOrder if you expect the "normal" ordering and content of columnlist consists of "Std" values (number, String, Date, Time).

list.Sort(StdValueOrder());

If you need something special, you can either create comparison function and use FnValueOrder, or you can derive ValueOrder and provide new operator().

Mirek

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