polylineobject.cpp

swain-0.5.2.zip的源代码,比较好用,希望大家喜欢.

/*
This file is part of SWAIN (http://sourceforge.net/projects/swain).
Copyright (C) 2006  Daniel Lindstr鰉 and Daniel Nilsson

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA  02110-1301, USA.
*/
#include "StdAfx.h"
#include "PolylineObject.h"

PolylineObject::PolylineObject(ViewPort *vp, ObjectManager *om, FPOINT *p, COLORREF color){
	i = 1;
	this->om = om;
	this->vp = vp;
	rect.bottom = p->y;
	rect.left = p->x;
	rect.right = p->x;
	rect.top = p->y;
	points[0].x = p->x;
	points[0].y = p->y;
	this->color = color;
}

PolylineObject::~PolylineObject(void){
}


void PolylineObject::addPoint(FPOINT *point){
	FRECT changed;
	if(i >= MAXPOINTS)
		return;
	changed.left = min(point->x, points[i-1].x);
	changed.top = min(point->y, points[i-1].y);
	changed.right = max(point->x, points[i-1].x);
	changed.bottom = max(point->y, points[i-1].y);
	vp->expandBoundsHack(&changed);
	addPoint2Bound(point, &rect);
	points[i].x = point->x;
	points[i].y = point->y;
	i++;
	this->om->objectChanged(this, &changed);
}

void PolylineObject::drawSelf(ViewPort *vp, FRECT *rect){
	if(i < 2)
		return;
	vp->drawPolyLine(this->points, i, color);
}

void PolylineObject::getBounds(FRECT *rc){
	*rc = rect;
	vp->expandBoundsHack(rc);
}