// RadioButton.h
#ifndef _RadioButton_h_
#define _RadioButton_h_

#include <CtrlLib/CtrlLib.h>
namespace Upp
{
	class RadioButton : public Option
	{
		typedef RadioButton CLASSNAME;
	public:
		RadioButton();
		Callback WhenAction;
		Callback WhenPush;
	private:
		Callback1<RadioButton*> WhenActionGroupNotify;
		void ActionEvent();
		void PushEvent();
		friend class RadioGroup;
	};

	class RadioGroup
	{
		typedef RadioGroup CLASSNAME;
	public:
		RadioGroup& Add(RadioButton*);
		RadioGroup& Remove(RadioButton*);
		void Disable();
		void Enable();
		RadioButton* Get();
		operator int();
	private:
		Vector<RadioButton*> group;
		void ActionEvent(RadioButton*);
	};

}
#endif

// RadioButton.cpp
#include "RadioButton.h"

using namespace Upp;

RadioButton::RadioButton(): Option()
{
	Pusher::WhenAction = THISBACK(ActionEvent);
	Pusher::WhenPush = THISBACK(PushEvent);
	SwitchImage();
}

void RadioButton::ActionEvent()
{
	Set(1);
	WhenActionGroupNotify(this);
	WhenAction();
}

void RadioButton::PushEvent()
{
	WhenPush();
}

RadioGroup& RadioGroup::Add(RadioButton* b)
{
	b->WhenActionGroupNotify = THISBACK(ActionEvent);
	group.Add(b);
	return *this;
}

RadioGroup& RadioGroup::Remove(RadioButton* b)
{
	for (int i = 0; i < group.GetCount(); i++)
		if (group[i] == b) {
			b->WhenActionGroupNotify.Clear();
			group.Remove(i);
			break;
		}
	return *this;
}

void RadioGroup::ActionEvent(RadioButton* b)
{
	for (int i = 0; i < group.GetCount(); i++)
		if (group[i] != b)
			group[i]->Set(0);
}

void RadioGroup::Disable()
{
	for (int i = 0; i < group.GetCount(); i++)
		group[i]->Disable();
}

void RadioGroup::Enable()
{
	for (int i = 0; i < group.GetCount(); i++)
		group[i]->Enable();
}

RadioButton* RadioGroup::Get()
{
	for (int i = 0; i < group.GetCount(); i++)
		if (group[i]->Get())
			return group[i];
	return 0;
}

RadioGroup::operator int()
{
	for (int i = 0; i < group.GetCount(); i++)
		if (group[i]->Get())
			return i;
	return Null;
}

#include <CtrlLib/CtrlLib.h>
#include "RadioButton.h"

using namespace Upp;

void RadioSelected(int x)
{
	Exclamation("WhenAction: You selected Button " + AsString(x));
}

GUI_APP_MAIN
{
	TopWindow win;
	win.SetRect(0, 0, 200, 200);
	RadioButton r1, r2, r3, r4;
	RadioGroup group;
	win.Add(r1.SetLabel("RadioButton 1").HSizePos(10, 10).TopPos(10, 25));
	win.Add(r2.SetLabel("RadioButton 2").HSizePos(20, 10).TopPos(40, 25));
	win.Add(r3.SetLabel("RadioButton 3").HSizePos(30, 10).TopPos(70, 25));
	win.Add(r4.SetLabel("RadioButton 4").HSizePos(20, 10).TopPos(100, 25));
	r4.WhenAction = callback1(RadioSelected, 4);
	group.Add(&r1).Add(&r2).Add(&r3).Add(&r4);
	win.Run();
	group.Disable();
	win.Run();
	group.Enable();
	win.Run();
	group.Remove(&r3); r3.Hide();
	win.Run();
	switch(group) {
	case 0:
		Exclamation("RadioGroup index start with 0...");
		break;
	case 1:
		Exclamation("Button 2");
		break;
	case 2:
	case 3:
		PromptOK("You selected button number 3 or 4");
		break;
	default:
		PromptOK("No button selected");	
	}
	PromptOK("That's my button ;) " + (group.Get()? group.Get()->GetLabel(): "NO BUTTON"));
}

ctrl RadioButton {
	group "Push";

	GetMinSize() { sz = XMinSize(); sz.cy += 2; return sz; }
	GetStdSize() { sz = GetMinSize(); sz.cx *= 7; sz.cy = max(16, sz.cy); return sz; }

	Doc    SetLabel;
	Font   SetFont = StdFont();
	bool   SetEditable = true @1 ? "Editable";
	
	Paint(w)
	{
		sz = GetSize();
		tcy = GetTextSize("W", .SetFont).cy;
		imagesize = GetImageSize("ClassicCtrlsImg::S0");
		x = 0;
		y = 0;
		w.DrawImage(x, y, "ClassicCtrlsImg::S0");
		w.DrawSmartText(x + imagesize.cx + 4, y + (imagesize.cy - tcy) / 2,
			                .SetLabel, .SetFont);
	}
};