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#include <irrlicht.h>
#include <irrTypes.h>
#include <iostream>

using namespace irr;

class GUIFormSpecMenu : public gui::IGUIElement
{
public:
	GUIFormSpecMenu(gui::IGUIEnvironment* env,
			gui::IGUIElement* parent, s32 id,
			const core::rect<s32> &rect):
		IGUIElement(gui::EGUIET_ELEMENT, env, parent, id, rect)
	{
		m_allow_focus_removal = false;
		setVisible(true);
		Environment->setFocus(this);

		core::rect<s32> listbox_rect(10, 10, 100, 200);
		gui::IGUIListBox *listbox = Environment->addListBox(
				listbox_rect, this, -1, true);
		listbox->addItem(L"Amazing apple pie");
		listbox->addItem(L"Bulky banana cream");
		listbox->addItem(L"Cool cherry sushi");
		listbox->addItem(L"Duftend Durian juice");
		listbox->addItem(L"Eloquent edible grass");
		listbox->addItem(L"Fried flaspberries");
		listbox->addItem(L"Gigantic gross guanotree grease");
		listbox->addItem(L"Heavy hot hippopotamus potato");
		listbox->addItem(L"Invisible icecream");
		listbox->addItem(L"Juicy juicejunk");
		listbox->addItem(L"Kleptomanic ketogenic leprechaunberries");
		listbox->addItem(L"Literate limonade");
		listbox->addItem(L"Minced melon meat");
		listbox->addItem(L"Nitty nutty nuts");
		listbox->addItem(L"Ordinary oatmeal");
	}
	virtual ~GUIFormSpecMenu()
	{
	}
	void allowFocusRemoval(bool allow)
	{
		m_allow_focus_removal = allow;
	}
	bool canTakeFocus(gui::IGUIElement *e)
	{
		return (e && (e == this || isMyChild(e))) || m_allow_focus_removal;
	}
	void draw()
	{
		if(!IsVisible)
			return;
			
		video::IVideoDriver* driver = Environment->getVideoDriver();
		video::SColor bgcolor(140,0,0,0);
		driver->draw2DRectangle(bgcolor, AbsoluteRect, &AbsoluteClippingRect);

		/*
			Call base class
		*/
		gui::IGUIElement::draw();
	}

	virtual bool OnEvent(const SEvent& event)
	{
		if(event.EventType==EET_MOUSE_INPUT_EVENT
				&& event.MouseInput.Event != EMIE_MOUSE_MOVED)
		{
			// Mouse event other than movement
			//...
		}
		if(event.EventType==EET_GUI_EVENT)
		{
			//...

			if(event.GUIEvent.EventType==gui::EGET_ELEMENT_FOCUS_LOST
					&& isVisible())
			{
				if(!canTakeFocus(event.GUIEvent.Element))
				{
					std::cerr<<"GUIFormSpecMenu: Not allowing focus change."
							<<std::endl;
					// Returning true disables focus change
					return true;
				}
			}
			//...

			if((event.GUIEvent.EventType==gui::EGET_LISTBOX_SELECTED_AGAIN) ||
				(event.GUIEvent.EventType==gui::EGET_LISTBOX_CHANGED))
			{
				//...
				return true;
			}
		}

		return Parent ? Parent->OnEvent(event) : false;
	}

private:
	bool m_allow_focus_removal;
};

class MyEventReceiver : public IEventReceiver
{
public:
	MyEventReceiver()
	{
		// nothing here currently
	}

	virtual bool OnEvent(const SEvent& event)
	{
		// nothing here currently
        	return false;
	}
};

int main(int argc, char **argv)
{
	video::E_DRIVER_TYPE driverType=video::EDT_OPENGL;

	// create device

	MyEventReceiver receiver;
	IrrlichtDevice *device = createDevice(driverType,
		core::dimension2d<u32>(512, 384), 16,
		false, false, false, &receiver);

	if (device == 0)
		return 1; // could not create selected driver.

	device->setWindowCaption(L"Irrlicht Engine - 2D Graphics Demo");

	video::IVideoDriver *driver = device->getVideoDriver();
	gui::IGUIEnvironment *guienv = device->getGUIEnvironment();
	gui::IGUIFont *font = guienv->getBuiltInFont();
	gui::IGUISkin *skin = guienv->getSkin();

	//skin->setColor(gui::EGDC_BUTTON_TEXT, video::SColor(255,0,0,0));
	skin->setColor(gui::EGDC_BUTTON_TEXT, video::SColor(255,255,255,255));
	//skin->setColor(gui::EGDC_3D_HIGH_LIGHT, video::SColor(0,0,0,0));
	//skin->setColor(gui::EGDC_3D_SHADOW, video::SColor(0,0,0,0));
	skin->setColor(gui::EGDC_3D_HIGH_LIGHT, video::SColor(255,0,0,0));
	skin->setColor(gui::EGDC_3D_SHADOW, video::SColor(255,0,0,0));
	skin->setColor(gui::EGDC_HIGH_LIGHT, video::SColor(255,70,100,50));
	skin->setColor(gui::EGDC_HIGH_LIGHT_TEXT, video::SColor(255,255,255,255));

	core::rect<s32> formspec_rect(5, 5, 200, 300);
	GUIFormSpecMenu *formspec = new GUIFormSpecMenu(guienv, guienv->getRootGUIElement(), -1, formspec_rect);

	while(device->run() && driver)
	{
		if (device->isWindowActive())
		{
			u32 time = device->getTimer()->getTime();

			driver->beginScene(true, true, video::SColor(255,120,102,136));
			guienv->drawAll();
			driver->endScene();
		}
	}

	device->drop();

	return 0;
}