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/*
* Copyright (c) 2010, 2011 Itiner.pl. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Itiner designates this
* particular file as subject to the "Classpath" exception as provided
* by Itiner in the LICENSE.txt file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package com.codename1.maps.layers;
import com.codename1.ui.Graphics;
import java.util.Vector;
import com.codename1.maps.BoundingBox;
import com.codename1.maps.Coord;
import com.codename1.maps.Mercator;
import com.codename1.maps.Projection;
import com.codename1.ui.geom.Point;
import com.codename1.maps.providers.MapProvider;
import com.codename1.maps.Tile;
/**
* This is a Lines Layer
*
* @author Roman Kamyk
*/
public class LinesLayer extends AbstractLayer {
private Vector _lineSegments;
protected int _lineColor;
/**
* Constructor with default projection Mercator.
*/
public LinesLayer() {
this(new Mercator(), "");
}
/**
* Constructor with default projection Mercator.
*/
public LinesLayer(String name) {
this(new Mercator(), name);
}
/**
* {@inheritDoc}
*/
public LinesLayer(Projection p, String name) {
super(p, name);
_lineSegments = new Vector();
_lineColor = 0x000000;
}
/**
* {@inheritDoc}
*/
public void paint(Graphics g, Tile screenTile) {
g.setColor(_lineColor);
g.setAntiAliased(true);
int segmentsNo = _lineSegments.size();
for (int i = 0; i < segmentsNo; i++) {
paintSegment(g, (Coord[]) _lineSegments.elementAt(i), screenTile);
}
}
/**
* Paint a segment.
*
* @param g a Graphics Object to paint on
* @param segment array of Coord to draw a Line.
* @param tile
*/
protected void paintSegment(Graphics g, Coord[] segment, Tile tile) {
int pointsNo = segment.length;
for (int i = 1; i < pointsNo; i++) {
Coord start = (Coord) segment[i - 1];
Coord end = (Coord) segment[i];
Point s = tile.pointPosition(start);
Point e = tile.pointPosition(end);
g.drawLine(s.getX(), s.getY(), e.getX(), e.getY());
// lame & simple way to make line thicker
g.drawLine(s.getX() - 1, s.getY(), e.getX() - 1, e.getY());
g.drawLine(s.getX() + 1, s.getY(), e.getX() + 1, e.getY());
g.drawLine(s.getX(), s.getY() - 1, e.getX(), e.getY() - 1);
g.drawLine(s.getX(), s.getY() + 1, e.getX(), e.getY() + 1);
}
}
/**
* Adds a Line segment to the Layer
* @param coords
*/
public void addLineSegment(Coord[] coords) {
if (coords == null || coords.length <= 1) {
return;
}
if (!coords[0].isProjected()) {
coords = getProjection().fromWGS84(coords);
}
_lineSegments.addElement(coords);
}
/**
* Sets the color of the Lines
* @param rgb
*/
public void lineColor(int rgb) {
_lineColor = rgb;
}
/**
* {@inheritDoc}
*/
public BoundingBox boundingBox() {
BoundingBox bbox = null;
for (int i = 0; i < _lineSegments.size(); i++) {
Coord[] coords = (Coord[]) _lineSegments.elementAt(i);
BoundingBox cBbox = BoundingBox.create(coords);
if (bbox == null) {
bbox = cBbox;
} else {
bbox = bbox.extend(cBbox);
}
}
return bbox;
}
}
