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ArrayCtrl sorting [message #13274]

Fri, 28 December 2007 10:42

michael
Messages: 153
Registered: May 2007
Location: Germany

Experienced Member

What is the best method to sort an ArrayCtrl?

array.sort(column)?
array.SetSortColumn(int ii, bool descending = false)?

If i use array.sort(column), how can i set the sort order?

Or is SetSortColumn or ToggleSortColumn(int ii) the better way to sort an ArrayCtrl?

It would be nice if someone could provide an example how to change the sort order of an ArrayCtrl.

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Re: ArrayCtrl sorting [message #13310 is a reply to message #13274]

Mon, 31 December 2007 18:48

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

michael wrote on Fri, 28 December 2007 04:42

SetSortColumn is more for GUI/user sorting (user clicks on column he wants to sort).

Use .Sort. That way you can use "Order" variant to provide more complex sorting predicate (based on all columns).

Mirek

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Re: ArrayCtrl sorting [message #13313 is a reply to message #13310]

Mon, 31 December 2007 19:35

michael
Messages: 153
Registered: May 2007
Location: Germany

Experienced Member

Thanks, Mirek.

But i didn't understand how to use Order. Can you please explain this?

Michael

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Re: ArrayCtrl sorting [message #13319 is a reply to message #13313]

Tue, 01 January 2008 11:01

mirek
Messages: 14291
Registered: November 2005

Ultimate Member

michael wrote on Mon, 31 December 2007 13:35

Thanks, Mirek.

But i didn't understand how to use Order. Can you please explain this?

Michael

E.g. like this:

struct DatumJmenoOrder : public ArrayCtrl::Order {
	virtual bool operator()(const Vector<Value>& row1, const Vector<Value>& row2) const
	{
		int q;
		q = (Date)row1[0] - (Date)row2[0];
		if(q) return q < 0;
		q = CompareJmeno(row1, row2, 1);
		if(q) return q < 0;
		q = CompareAdresa(row1, row2, 4);
		return q < 0;
	}
};

Compares based on 3 rows, with specific comparisons used for two of them...

Mirek

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