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Re: Proposal: add IsReadOnly() handling inside ButtonOption [message #26435 is a reply to message #26434]

Sat, 01 May 2010 18:01

dolik.rce
Messages: 1789
Registered: August 2008
Location: Czech Republic

Ultimate Contributor

Mindtraveller wrote on Sat, 01 May 2010 16:07

I've made a number of attempts to make "chosen" button option irresponsible to user clicks and failed. Digging into code revealed that there is no way to make it.

Hi Pavel!

There is a way Wink

Maybe not as straightforward as your patch, but it works fine too. The trick is to check the value of ButtonOption in WhenAction callback and revert the action whenever user tries to "unclick" the button:

#include "CtrlLib/CtrlLib.h"
using namespace Upp;

struct App : TopWindow {
	typedef App CLASSNAME;
	Array<ButtonOption> btns;
	void Check(int n){
		if (~btns[n]==0) btns[n].Set(true);
		else for(int i = 0; i < btns.GetCount(); i++)
			if(i!=n) btns[i].Set(false);
	}
	App(){
		btns.Add().SetLabel("Click me! :-)").SetRect(10,10,200,50);
		btns.Add().SetLabel("No, click me! (-:").SetRect(10,70,200,50);
		for(int i = 0; i < btns.GetCount(); i++){
			btns[i]<<=THISBACK1(Check,i);
			Add(btns[i]);
		}
	}
};

GUI_APP_MAIN{
	App().Run();
}

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