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Sat, 18 September 2010 13:01

281264
Messages: 270
Registered: June 2010
Location: Spain

Experienced Member

Chaps:

Allow me to ask some questions concerning TreeCtrl. Here they go:

1.- What is the role of id, key and value? I think id is assigned automatically at the time a node is added and one can not control it-??;

2.- How to modify the look of the TreeCtrl? For example how to implement a Display? I am trying this in a .h file:

struct MyDisplay: public Display{
	virtual void Paint(Draw& w, const Rect& r, const Value& q, Color ink,Color paper,dword style){
		w.DrawRect(r,paper);
	}
};

And this in the implementation:

	
tree.SetDisplay(Single<MyDisplay>());

but I do not have a clear understanding of Display behaviour. For example if I wanted to modify the font, font color, backcolor, etc of an element of the tree when it is clicked, how to do it?

3.- How is Value q passed to a Display?

Many thank.

Cheers,

Javier

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