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ColumnList question (sort column) [message #2898]

Sat, 29 April 2006 11:32

forlano
Messages: 1185
Registered: March 2006
Location: Italy

Senior Contributor

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

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Re: ColumnList question (sort column) [message #2909 is a reply to message #2898]

Sat, 29 April 2006 19:52

fudadmin
Messages: 1321
Registered: November 2005
Location: Kaunas, Lithuania

Ultimate Contributor
Administrator

I don't know how much useful for your case but you can try to study ide/Custom.cpp:

class CustomOrder : public ArrayCtrl::Order {
public:
	virtual bool operator()(const Vector<Value>& row1, const Vector<Value>& row2) const {
		for(int i = 0; i < 3; i++)
			if(String(row1[i]) != String(row2[i]))
				return String(row1[i]) < String(row2[i]);
		return false;
	}
};

and related stuff...

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Re: ColumnList question (sort column) [message #2912 is a reply to message #2909]

Sat, 29 April 2006 21:41

forlano
Messages: 1185
Registered: March 2006
Location: Italy

Senior Contributor

fudadmin wrote on Sat, 29 April 2006 19:52

I don't know how much useful for your case but you can try to study ide/Custom.cpp:

class CustomOrder : public ArrayCtrl::Order {
public:
	virtual bool operator()(const Vector<Value>& row1, const Vector<Value>& row2) const {
		for(int i = 0; i < 3; i++)
			if(String(row1[i]) != String(row2[i]))
				return String(row1[i]) < String(row2[i]);
		return false;
	}
};

and related stuff...

Oh my God ...
I guess I'll continue to live with an unsorted columnlist Smile

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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: 13975
Registered: November 2005

Ultimate Member

forlano wrote on Sat, 29 April 2006 05:32

[/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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Re: ColumnList question (sort column) [message #2916 is a reply to message #2913]

Sat, 29 April 2006 23:20

forlano
Messages: 1185
Registered: March 2006
Location: Italy

Senior Contributor

luzr wrote on Sat, 29 April 2006 22:58

list.Sort(StdValueOrder());

This was enough to let it to work. The other lines were too complicated to understand for the moment... I've not yet learned the chapter about the operator in the Eckel's book Smile

.
Thanks,
Luigi

[Updated on: Sat, 29 April 2006 23:20]

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