/*******************************************************************************
* Copyright 2012 Pearson Education
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package org.semantictools.graphics;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
public class Arc {
private ArcEnd[] ends;
public Arc(ArcEnd a, ArcEnd b) {
ends = new ArcEnd[]{a, b};
a.setArc(this);
b.setArc(this);
}
public ArcEnd[] getEnds() {
return ends;
}
public ArcEnd getOtherEnd(ArcEnd end) {
return
end == ends[0] ? ends[1] :
end == ends[1] ? ends[0] :
null;
}
public void paint(Graphics2D g) {
switch (ends[0].getEdge()) {
case RIGHT : paintFromRightEdge(g); break;
case TOP: paintFromTopEdge(g); break;
case LEFT: paintFromLeftEdge(g); break;
case BOTTOM: paintFromBottomEdge(g); break;
}
}
private void paintFromBottomEdge(Graphics2D g) {
switch (ends[1].getEdge()) {
case TOP: paintFromBottomToTop(g); break;
}
}
private void paintFromTopEdge(Graphics2D g) {
switch(ends[1].getEdge()) {
case BOTTOM: paintFromTopToBottom(g); break;
}
}
private void paintFromRightEdge(Graphics2D g) {
switch (ends[1].getEdge()) {
case LEFT : paintFromRightToLeft(g);
}
}
private void paintFromLeftEdge(Graphics2D g) {
switch (ends[1].getEdge()) {
case RIGHT : paintFromLeftToRight(g);
}
}
private void paintFromBottomToTop(Graphics2D g) {
g.setTransform(new AffineTransform());
Transformer t0 = new Transformer(ends[0].getParent());
Transformer t1 = new Transformer(ends[1].getParent());
int xe0 = ends[0].getArcX();
int ye0 = ends[0].getArcY();
int xe1 = ends[1].getArcX();
int ye1 = ends[1].getArcY();
int x1 = t0.x(xe0, ye0);
int y1 = t0.y(xe0, ye0);
int x4 = t1.x(xe1, ye1);
int y4 = t1.y(xe1, ye1);
int x2 = x1;
int y2 = (y1+y4)/2;
int x3 = x4;
int y3 = y2;
Style style = ends[0].getStyle();
g.setColor(style.getBorderColor());
g.drawLine(x1, y1, x2, y2);
g.drawLine(x2, y2, x3, y3);
g.drawLine(x3, y3, x4, y4);
paintEnd(g, ends[0]);
paintEnd(g, ends[1]);
}
private void paintFromTopToBottom(Graphics2D g) {
// Transformer t0 = new Transformer(ends[0].getParent());
// Transformer t1 = new Transformer(ends[1].getParent());
//
// int xe0 = ends[0].getArcX();
// int ye0 = ends[0].getArcY();
//
//
//
// int xe1 = ends[1].getArcX();
// int ye1 = ends[1].getArcY();
//
// int x1 = t0.x(xe0, ye0);
// int y1 = t0.y(xe0, ye0);
//
// int x2 = t1.x(xe1, ye1);
// int y2 = t1.y(xe1, ye1);
//
//
// Style style = ends[0].getStyle();
//
// g.setColor(style.getBorderColor());
// g.drawLine(x1, y1, x2, y2);
//
// paintEnd(g, ends[0]);
// paintEnd(g, ends[1]);
g.setTransform(new AffineTransform());
Transformer t0 = new Transformer(ends[0].getParent());
Transformer t1 = new Transformer(ends[1].getParent());
int xe0 = ends[0].getArcX();
int ye0 = ends[0].getArcY();
int xe1 = ends[1].getArcX();
int ye1 = ends[1].getArcY();
int x1 = t0.x(xe0, ye0);
int y1 = t0.y(xe0, ye0);
int x4 = t1.x(xe1, ye1);
int y4 = t1.y(xe1, ye1);
int x2 = x1;
int y2 = (y1+y4)/2;
int x3 = x4;
int y3 = y2;
Style style = ends[0].getStyle();
g.setColor(style.getBorderColor());
g.drawLine(x1, y1, x2, y2);
g.drawLine(x2, y2, x3, y3);
g.drawLine(x3, y3, x4, y4);
paintEnd(g, ends[0]);
paintEnd(g, ends[1]);
}
private void paintFromLeftToRight(Graphics2D g) {
AffineTransform save = new AffineTransform(g.getTransform());
g.setTransform(new AffineTransform());
ArcEnd e0 = ends[0];
ArcEnd e1 = ends[1];
Transformer t0 = new Transformer(e0.getParent());
Transformer t1 = new Transformer(e1.getParent());
int xe0 = ends[0].getArcX();
int ye0 = ends[0].getArcY();
int xe1 = ends[1].getArcX();
int ye1 = ends[1].getArcY();
int x1 = t0.x(xe0, ye0);
int y1 = t0.y(xe0, ye0);
int x4 = t1.x(xe1, ye1);
int y4 = t1.y(xe1, ye1);
if (x4 < x1) {
int temp = x4;
x4 = x1;
x1 = temp;
temp = y4;
y4 = y1;
y1 = temp;
ArcEnd e = e1;
e1 = e0;
e0 = e;
t0 = t1;
}
int x2e0 = e0.getX() + e0.getBounds().getWidth();
int y2e0 = e0.getY();
int x2 = t0.x(x2e0, y2e0);
int y2 = t0.y(x2e0, y2e0);
int x3 = x2;
int y3 = y4;
Style style = ends[0].getStyle();
g.setColor(style.getBorderColor());
g.drawLine(x1, y1, x2, y2);
g.drawLine(x2, y2, x3, y3);
g.drawLine(x3, y3, x4, y4);
paintEnd(g, ends[0]);
paintEnd(g, ends[1]);
g.setTransform(save);
}
// private void paintFromLeftToRight(Graphics2D g) {
//
// AffineTransform save = new AffineTransform(g.getTransform());
// g.setTransform(new AffineTransform());
//
// Transformer t0 = new Transformer(ends[0].getParent());
// Transformer t1 = new Transformer(ends[1].getParent());
//
// int xe0 = ends[0].getArcX();
// int ye0 = ends[0].getArcY();
//
// int xe1 = ends[1].getArcX();
// int ye1 = ends[1].getArcY();
//
// int tx0 = t0.x(xe0, ye0);
// int tx1 = t1.x(xe1, ye1);
//
// int dx = (int)Math.signum(tx1 - tx0);
//
// int x2e0 = ends[0].getX() + dx * ends[0].getBounds().getWidth();
// int y2e0 = ends[0].getY();
//
//
//
// int x1 = tx0;
// int y1 = t0.y(xe0, ye0);
//
// int x2 = t0.x(x2e0, y2e0);
// int y2 = t0.y(x2e0, y2e0);
//
//
//
// int x3 = x2;
// int y3 = t1.y(xe1, ye1);
//
// int x4 = tx1;
// int y4 = y3;
//
//
// Style style = ends[0].getStyle();
//
// g.setColor(style.getBorderColor());
// g.drawLine(x1, y1, x2, y2);
// g.drawLine(x2, y2, x3, y3);
// g.drawLine(x3, y3, x4, y4);
//
// paintEnd(g, ends[0]);
// paintEnd(g, ends[1]);
//
// g.setTransform(save);
//
// }
private void paintFromRightToLeft(Graphics2D g) {
AffineTransform save = new AffineTransform(g.getTransform());
Transformer t0 = new Transformer(ends[0].getParent());
Transformer t1 = new Transformer(ends[1].getParent());
int xe0 = ends[0].getArcX();
int ye0 = ends[0].getArcY();
int x2e0 = ends[0].getX() + ends[0].getBounds().getWidth();
int y2e0 = ends[0].getY();
int x1 = t0.x(xe0, ye0);
int y1 = t0.y(xe0, ye0);
int x2 = t0.x(x2e0, y2e0);
int y2 = t0.y(x2e0, y2e0);
int xe1 = ends[1].getArcX();
int ye1 = ends[1].getArcY();
int x3 = x2;
int y3 = t1.y(xe1, ye1);
int x4 = t1.x(xe1, ye1);
int y4 = y3;
Style style = ends[0].getStyle();
g.setColor(style.getBorderColor());
g.drawLine(x1, y1, x2, y2);
g.drawLine(x2, y2, x3, y3);
g.drawLine(x3, y3, x4, y4);
paintEnd(g, ends[0]);
paintEnd(g, ends[1]);
g.setTransform(save);
}
private void paintEnd(Graphics2D g, ArcEnd end) {
GraphicsUtil.setTransform(g, end.getParent());
end.paint(g);
}
}