/*
 * I. ARIT 1992 Hidirbeyli,AYDIN,TR.  09400 Golden,    CO,   USA. 80401 
 *
 *
 * Copyright (C) 1992 Ismail ARIT 
 *
 * This file  is distributed in the hope that it will be useful, but without any
 * warranty.  No author or distributor accepts responsibility to anyone for
 * the consequences of using it or for whether it serves any particular
 * purpose or works at all. 
 *
 *
 * Everyone is granted permission to copy, modify and redistribute this file
 * under the following conditions: 
 *
 *
 * Permission is granted to anyone to make or distribute copies of the source
 * code, either as received or modified, in any medium, provided that all
 * copyright notices, permission and nonwarranty notices are preserved, and
 * that the distributor grants the recipient permission for further
 * redistribution as permitted by this document. 
 *
 * No part of this program can be used in any commercial product. 
 */


#include <windows.h>
#include <stdio.h>
#include <malloc.h>
#include <math.h>
#include <stdlib.h>

#include "definiti.h"



extern char    *progname;

extern HPEN     StickPen;
extern HPEN     TrajPen;



static void
Stick_Show(Stick * this, HDC hdc)
{
	this->Visible = YES;
	MoveTo(hdc, this->New.x, this->New.y);
	LineTo(hdc, this->New.xx, this->New.yy);

};

static void
Stick_Hide(Stick * this, HDC hdc)
{
	if (this->Visible) {
		MoveTo(hdc, this->Old.x, this->Old.y);
		LineTo(hdc, this->Old.xx, this->Old.yy);
	}
	this->Visible = NO;
};

static void
Stick_Delete(Stick * this, HDC hdc)
{
	HPEN            hpenOld;
	int             mode;

	if (this->type == STICK)
		hpenOld = SelectObject(hdc, StickPen);
	else
		hpenOld = SelectObject(hdc, TrajPen);

	mode = SetROP2(hdc, R2_XORPEN);

	this->Hide(this, hdc);

	SetROP2(hdc, mode);

	SelectObject(hdc, hpenOld);


};

static void
Stick_MoveTo(Stick * this, HDC hdc, int Button, int x, int y, int xx, int yy)
{

	HPEN            hpenOld;
	int             mode;

	this->New.x = x;
	this->New.y = y;
	this->New.xx = xx;
	this->New.yy = yy;
	if (this->type == STICK)
		hpenOld = SelectObject(hdc, StickPen);
	else
		hpenOld = SelectObject(hdc, TrajPen);

	mode = SetROP2(hdc, R2_XORPEN);

	if (Button == TRUE) {
		this->Hide(this, hdc);
		this->Show(this, hdc);
	} else
		this->Hide(this, hdc);


	SetROP2(hdc, mode);

	SelectObject(hdc, hpenOld);


	this->Old.x = this->New.x;
	this->Old.xx = this->New.xx;
	this->Old.y = this->New.y;
	this->Old.yy = this->New.yy;

};




static void
Stick_Status(Stick * this, int status)
{
	this->Done = status;
	if (this->Done) {
		this->Old.x = this->Old.y = 0;
		this->Old.xx = this->Old.yy = 0;
	}
};

float
Stick_Lenght(Stick * this)
{
	return (hypot((float) (this->New.xx - this->New.x), (float) (this->New.yy - this->New.y)));

};


Stick          *
new__Stick(int type)
{

	Stick          *this;

	this = (Stick *) malloc(sizeof(Stick));
	if (!this) {
		printf("problem..\n");
		exit(0);
	}
	/* this is default stick color */
	this->Done = NO;
	this->Visible = NO;
	this->type = type;
	this->Old.x = this->New.x = 0;
	this->Old.xx = this->New.xx = 0;
	this->Old.y = this->New.y = 0;
	this->Old.yy = this->New.yy = 0;


	this->Show = Stick_Show;
	this->Hide = Stick_Hide;
	this->MoveTo = Stick_MoveTo;
	this->DoneWithTheStick = Stick_Status;
	this->Lenght = Stick_Lenght;
	this->Delete = Stick_Delete;


	return (this);


};