// This example was started by Guillaume Laurent.

// It has become a place to dump code that tests parts of the

// gnomemm canvas code. Little thought has been given to the

// actual on-screen output.

#include <libgnomecanvasmm.h>

#include <libgnomecanvasmm/polygon.h>

#include <iostream>

class CanvasExample : public Gnome::Canvas::CanvasAA

{

	typedef Gnome::Canvas::CanvasAA Parent;

public:

	CanvasExample();

	virtual ~CanvasExample();

private:

	bool event_handler(GdkEvent* e, bool b);

	Gnome::Canvas::Points coos;

	Gnome::Art::Point * wp;

	Gnome::Canvas::Ellipse ** nodes;

	Gnome::Canvas::Polygon * sides;

	Gnome::Canvas::Group triangle;

};

bool CanvasExample::event_handler(GdkEvent* e, bool b)

{

	bool isbutton=true;

	switch(e->type)

	{

		case GDK_BUTTON_PRESS: printf("Node is pressed!\n"); break;

		//case GDK_BUTTON_RELEASE: printf("Node is released!\n"); break;

		default: isbutton=false; break;

	}

	if(isbutton)

	{

		//(get_item_at(e->button.x, e->button.y))->move(5,5);

		(get_item_at(e->button.x, e->button.y))->hide();

	}

}

CanvasExample::CanvasExample():triangle(*(root()), 0, 0)

{

	double ax=100;

	double ay=100;

	double bx=-100;

	double by=100;

	double cx=0;

	double cy=-100;

	coos.push_back(Gnome::Art::Point(100, 100));

	coos.push_back(Gnome::Art::Point(-100, 100));

	coos.push_back(Gnome::Art::Point(0, -100));

	sides=new Gnome::Canvas::Polygon(triangle, coos);

	*sides << Gnome::Canvas::Properties::outline_color("green");

	sides->property_width_pixels().set_value(10);

	nodes=new ( Gnome::Canvas::Ellipse * ) [4];

	for(int i=0; i<3;i++)

	{

		nodes[i]= new Gnome::Canvas::Ellipse(triangle, coos[i].get_x()-20, coos[i].get_y()-20, coos[i].get_x()+20, coos[i].get_y()+20);

		*(nodes[i]) << Gnome::Canvas::Properties::fill_color("blue");

		*(nodes[i]) << Gnome::Canvas::Properties::outline_color("black");

		(nodes[i])->signal_event().connect(sigc::bind(sigc::mem_fun(*this, &CanvasExample::event_handler),true));

	}

	wp=new Gnome::Art::Point((ax+bx+cx)/3,(ay+by+cy)/3);

	nodes[3]= new Gnome::Canvas::Ellipse(triangle, wp->get_x()-20, wp->get_y()-20, wp->get_x()+20, wp->get_y()+20);

	*(nodes[3]) << Gnome::Canvas::Properties::fill_color("blue");

	*(nodes[3]) << Gnome::Canvas::Properties::outline_color("black");

}

CanvasExample::~CanvasExample()

{

}

//MainWin:

class MainWin : public Gtk::Window

{

public:

	MainWin(const std::string& title);

protected:

	//Member widgets:

	CanvasExample m_canvas;

};

MainWin::MainWin(const std::string& title)

{

	set_title (title);

	add(m_canvas);

	set_default_size(900,600);

	show_all();

}

//main():

int main(int argc, char *argv[])

{

	Gnome::Canvas::init();

	Gtk::Main app(argc, argv);

	MainWin mainwin("Gnome::Canvas Example");

	app.run(mainwin);

	return 0;

}