// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.data.validation;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import org.openstreetmap.josm.data.coor.LatLon;
import org.openstreetmap.josm.data.osm.Node;
import org.openstreetmap.josm.data.osm.OsmPrimitive;
import org.openstreetmap.josm.data.osm.Relation;
import org.openstreetmap.josm.data.osm.Way;
import org.openstreetmap.josm.data.osm.WaySegment;
import org.openstreetmap.josm.data.osm.visitor.AbstractVisitor;
import org.openstreetmap.josm.gui.MapView;
/**
* Visitor that highlights the primitives affected by an error
* @author frsantos
* @since 5671
*/
public class PaintVisitor extends AbstractVisitor implements ValidatorVisitor {
/** The graphics */
private final Graphics g;
/** The MapView */
private final MapView mv;
/** The severity color */
private Color color;
/** Is the error selected ? */
private boolean selected;
private final Set<PaintedPoint> paintedPoints = new HashSet<>();
private final Set<PaintedSegment> paintedSegments = new HashSet<>();
/**
* Constructor
* @param g The graphics
* @param mv The Mapview
*/
public PaintVisitor(Graphics g, MapView mv) {
this.g = g;
this.mv = mv;
}
protected static class PaintedPoint {
protected final LatLon p1;
protected final Color color;
public PaintedPoint(LatLon p1, Color color) {
this.p1 = p1;
this.color = color;
}
@Override
public int hashCode() {
return Objects.hash(p1, color);
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null || getClass() != obj.getClass()) return false;
PaintedPoint that = (PaintedPoint) obj;
return Objects.equals(p1, that.p1) &&
Objects.equals(color, that.color);
}
}
protected static class PaintedSegment extends PaintedPoint {
private final LatLon p2;
public PaintedSegment(LatLon p1, LatLon p2, Color color) {
super(p1, color);
this.p2 = p2;
}
@Override
public int hashCode() {
return Objects.hash(super.hashCode(), p2);
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null || getClass() != obj.getClass()) return false;
if (!super.equals(obj)) return false;
PaintedSegment that = (PaintedSegment) obj;
return Objects.equals(p2, that.p2);
}
}
@Override
public void visit(TestError error) {
if (error != null && !error.isIgnored()) {
color = error.getSeverity().getColor();
selected = error.isSelected();
error.visitHighlighted(this);
}
}
@Override
public void visit(OsmPrimitive p) {
if (p.isUsable()) {
p.accept(this);
}
}
/**
* Draws a circle around the node
* @param n The node
* @param color The circle color
*/
protected void drawNode(Node n, Color color) {
PaintedPoint pp = new PaintedPoint(n.getCoor(), color);
if (!paintedPoints.contains(pp)) {
Point p = mv.getPoint(n);
if (selected) {
g.setColor(getHighlightColor(color));
g.fillOval(p.x - 5, p.y - 5, 10, 10);
}
g.setColor(color);
g.drawOval(p.x - 5, p.y - 5, 10, 10);
paintedPoints.add(pp);
}
}
/**
* Draws a line around the segment
*
* @param p1 The first point of segment
* @param p2 The second point of segment
* @param color The color
*/
protected void drawSegment(Point p1, Point p2, Color color) {
double t = Math.atan2((double) p2.x - p1.x, (double) p2.y - p1.y);
double cosT = 5 * Math.cos(t);
double sinT = 5 * Math.sin(t);
int deg = (int) Math.toDegrees(t);
if (selected) {
g.setColor(getHighlightColor(color));
int[] x = new int[] {(int) (p1.x + cosT), (int) (p2.x + cosT),
(int) (p2.x - cosT), (int) (p1.x - cosT)};
int[] y = new int[] {(int) (p1.y - sinT), (int) (p2.y - sinT),
(int) (p2.y + sinT), (int) (p1.y + sinT)};
g.fillPolygon(x, y, 4);
g.fillArc(p1.x - 5, p1.y - 5, 10, 10, deg, 180);
g.fillArc(p2.x - 5, p2.y - 5, 10, 10, deg, -180);
}
g.setColor(color);
g.drawLine((int) (p1.x + cosT), (int) (p1.y - sinT),
(int) (p2.x + cosT), (int) (p2.y - sinT));
g.drawLine((int) (p1.x - cosT), (int) (p1.y + sinT),
(int) (p2.x - cosT), (int) (p2.y + sinT));
g.drawArc(p1.x - 5, p1.y - 5, 10, 10, deg, 180);
g.drawArc(p2.x - 5, p2.y - 5, 10, 10, deg, -180);
}
/**
* Draws a line around the segment
*
* @param n1 The first node of segment
* @param n2 The second node of segment
* @param color The color
*/
protected void drawSegment(Node n1, Node n2, Color color) {
if (n1.isDrawable() && n2.isDrawable() && isSegmentVisible(n1, n2)) {
PaintedSegment ps = new PaintedSegment(n1.getCoor(), n2.getCoor(), color);
if (!paintedSegments.contains(ps)) {
drawSegment(mv.getPoint(n1), mv.getPoint(n2), color);
paintedSegments.add(ps);
}
}
}
/**
* Draw a small rectangle.
* White if selected (as always) or red otherwise.
*
* @param n The node to draw.
*/
@Override
public void visit(Node n) {
if (n.isDrawable() && isNodeVisible(n)) {
drawNode(n, color);
}
}
@Override
public void visit(Way w) {
visit(w.getNodes());
}
@Override
public void visit(WaySegment ws) {
if (ws.lowerIndex < 0 || ws.lowerIndex + 1 >= ws.way.getNodesCount())
return;
Node a = ws.way.getNodes().get(ws.lowerIndex);
Node b = ws.way.getNodes().get(ws.lowerIndex + 1);
drawSegment(a, b, color);
}
@Override
public void visit(Relation r) {
/* No idea how to draw a relation. */
}
/**
* Checks if the given node is in the visible area.
* @param n The node to check for visibility
* @return true if the node is visible
*/
protected boolean isNodeVisible(Node n) {
Point p = mv.getPoint(n);
return !((p.x < 0) || (p.y < 0) || (p.x > mv.getWidth()) || (p.y > mv.getHeight()));
}
/**
* Checks if the given segment is in the visible area.
* NOTE: This will return true for a small number of non-visible
* segments.
* @param n1 The first point of the segment to check
* @param n2 The second point of the segment to check
* @return {@code true} if the segment is visible
*/
protected boolean isSegmentVisible(Node n1, Node n2) {
Point p1 = mv.getPoint(n1);
Point p2 = mv.getPoint(n2);
if ((p1.x < 0) && (p2.x < 0))
return false;
if ((p1.y < 0) && (p2.y < 0))
return false;
if ((p1.x > mv.getWidth()) && (p2.x > mv.getWidth()))
return false;
if ((p1.y > mv.getHeight()) && (p2.y > mv.getHeight()))
return false;
return true;
}
@Override
public void visit(List<Node> nodes) {
Node lastN = null;
for (Node n : nodes) {
if (lastN == null) {
lastN = n;
continue;
}
drawSegment(lastN, n, color);
lastN = n;
}
}
/**
* Gets the color to draw highlight markers with.
* @param color severity color
* @return The color.
*/
private static Color getHighlightColor(Color color) {
return new Color(color.getRed(), color.getGreen(), color.getBlue(), (int) (color.getAlpha() * .4));
}
/**
* Clears the internal painted objects collections.
*/
public void clearPaintedObjects() {
paintedPoints.clear();
paintedSegments.clear();
}
}