forked from bioclipse/bioclipse.cheminformatics
/
SWTRenderer.java
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SWTRenderer.java
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/*******************************************************************************
* Copyright (c) 2009 Arvid Berg <goglepox@users.sourceforge.net>
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* <http://www.eclipse.org/legal/epl-v10.html>
*
* Contact: http://www.bioclipse.net/
******************************************************************************/
package net.bioclipse.cdk.jchempaint.view;
import java.awt.geom.AffineTransform;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;
import javax.vecmath.Point2d;
import javax.vecmath.Vector2d;
import org.apache.log4j.Logger;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Path;
import org.eclipse.swt.graphics.Point;
import org.openscience.cdk.renderer.RendererModel;
import org.openscience.cdk.renderer.elements.ArrowElement;
import org.openscience.cdk.renderer.elements.AtomSymbolElement;
import org.openscience.cdk.renderer.elements.ElementGroup;
import org.openscience.cdk.renderer.elements.GeneralPath;
import org.openscience.cdk.renderer.elements.IRenderingElement;
import org.openscience.cdk.renderer.elements.LineElement;
import org.openscience.cdk.renderer.elements.OvalElement;
import org.openscience.cdk.renderer.elements.PathElement;
import org.openscience.cdk.renderer.elements.RectangleElement;
import org.openscience.cdk.renderer.elements.TextElement;
import org.openscience.cdk.renderer.elements.WedgeLineElement;
import org.openscience.cdk.renderer.font.IFontManager;
import org.openscience.cdk.renderer.visitor.IDrawVisitor;
public class SWTRenderer implements IDrawVisitor{
private Logger logger = Logger.getLogger( SWTRenderer.class );
private GC gc;
private RendererModel model;
private AffineTransform transform;
private SWTFontManager fontManager;
private Map<java.awt.Color, Color> cleanUp;
public SWTRenderer(GC graphics) {
transform = new AffineTransform();
this.model = new RendererModel();
this.gc = graphics;
}
private enum Type {
Forground,Background
}
private void setForeground(java.awt.Color color) {
setColor(Type.Forground,color);
}
private void setBackground(java.awt.Color color) {
setColor(Type.Background,color);
}
private void setColor(Type type,java.awt.Color color) {
Color c = toSWTColor( gc, color );
int alpha = color.getAlpha();
switch ( type ) {
case Forground:
gc.setForeground( c );
gc.setAlpha( alpha );
break;
case Background:
gc.setBackground( c );
gc.setAlpha( alpha );
break;
}
}
public RendererModel getModel() {
return model;
}
private int transformX(double x) {
return (int) transform( x, 1 )[0];
}
private int transformY(double y) {
return (int) transform( 1, y )[1];
}
private double[] transform(double x, double y) {
double [] result = new double[2];
transform.transform( new double[] {x,y}, 0, result, 0, 1 );
return result;
}
private float[] transform(float[] values) {
float[] result = new float[values.length];
transform.transform( values, 0, result, 0, result.length/2 );
return result;
}
private int scaleX(double x) {
return (int) (x*transform.getScaleX());
}
private int scaleY(double y) {
return (int) (y*transform.getScaleY());
}
public void render(ElementGroup renderingModel) {
for (IRenderingElement re : renderingModel) {
re.accept( this );
}
}
public void visit( OvalElement element ) {
Color colorOld = gc.getBackground();
int radius = scaleX(element.radius);
int diameter = scaleX(element.radius * 2);
if (element.fill) {
setBackground(element.color);
gc.fillOval(transformX(element.x) - radius,
transformY(element.y) - radius,
diameter,
diameter );
} else {
setForeground(element.color);
gc.drawOval(transformX(element.x) - radius,
transformY(element.y) - radius,
diameter,
diameter );
}
gc.setBackground( colorOld);
}
public void visit( LineElement element ) {
Color bColorOld = gc.getBackground();
Color fColorOld = gc.getForeground();
int oldLineWidth = gc.getLineWidth();
// init recursion with background to get the first draw with foreground
setForeground( element.color );
double bondWidth = scaleX(element.width);
gc.setLineWidth( (int) (bondWidth<1?1:bondWidth) );
drawLine( element );
gc.setLineWidth( oldLineWidth );
gc.setBackground( bColorOld);
gc.setForeground( fColorOld );
}
public void visit( WedgeLineElement element) {
Color colorOld = gc.getBackground();
setForeground( getForgroundColor() );
setBackground( getForgroundColor() );
//drawWedge( element);
drawWedge( element );
gc.setBackground( colorOld );
}
private void drawWedge(WedgeLineElement wedge) {
Vector2d normal =
new Vector2d(wedge.y1 - wedge.y2, wedge.x2 - wedge.x1);
normal.normalize();
normal.scale(model.getWedgeWidth() / model.getScale());
// make the triangle corners
Point2d vertexA = new Point2d(wedge.x1, wedge.y1);
Point2d vertexB = new Point2d(wedge.x2, wedge.y2);
Point2d vertexC = new Point2d(vertexB);
vertexB.add(normal);
vertexC.sub(normal);
if (wedge.isDashed)
drawDashedWedge( vertexA, vertexB, vertexC);
else
drawFilledWedge(vertexA, vertexB, vertexC);
}
private void drawFilledWedge(Point2d pA, Point2d pB, Point2d pC) {
double[] a = transform(pA.x, pA.y);
double[] b = transform(pB.x, pB.y);
double[] c = transform(pC.x, pC.y);
Path path = new Path(gc.getDevice());
path.moveTo((float) a[0], (float) a[1]);
path.lineTo((float) b[0], (float) b[1]);
path.lineTo((float) c[0], (float) c[1]);
path.close();
gc.fillPath( path );
path.dispose();
}
private void drawDashedWedge(Point2d pA, Point2d pB, Point2d pC) {
// calculate the distances between lines
double distance = pB.distance(pA);
double gapFactor = 0.075;
double gap = distance * gapFactor;
double numberOfDashes = distance / gap;
double d = 0;
// draw by interpolating along the edges of the triangle
Path path = new Path(gc.getDevice());
for (int i = 0; i < numberOfDashes; i++) {
Point2d p1 = new Point2d();
p1.interpolate(pA, pB, d);
Point2d p2 = new Point2d();
p2.interpolate(pA, pC, d);
double[] p1T = transform(p1.x, p1.y);
double[] p2T = transform(p2.x, p2.y);
path.moveTo((float)p1T[0], (float)p1T[1]);
path.lineTo((float)p2T[0], (float)p2T[1]);
if (distance * (d + gapFactor) >= distance) {
break;
} else {
d += gapFactor;
}
}
gc.drawPath( path);
path.dispose();
}
private java.awt.Color getForgroundColor() {
return getModel().getForeColor();
}
private java.awt.Color getBackgroundColor() {
return getModel().getBackColor();
}
private void drawLine(LineElement element) {
Path path = new Path(gc.getDevice());
double[] p1=transform( element.x1, element.y1 );
double[] p2=transform( element.x2, element.y2 );
path.moveTo( (float)p1[0], (float)p1[1] );
path.lineTo( (float)p2[0], (float)p2[1] );
gc.drawPath( path );
path.dispose();
}
private Font getFont() {
return fontManager.getFont();
}
private Font getSmallFont() {
return fontManager.getSmallFont();
}
public void visit(ArrowElement element) {
Path path = new Path(gc.getDevice());
double[] a=transform( element.x1, element.y1 );
double[] b=transform( element.x2, element.y2 );
path.moveTo((float)a[0], (float)a[1]);
path.lineTo((float)b[0], (float)b[1]);
double aW = model.getArrowHeadWidth() / model.getScale();
if (element.direction) {
double[] c = transform( element.x1 - aW, element.y1 - aW );
double[] d = transform( element.x1 - aW, element.y1 + aW );
path.moveTo((float)a[0], (float)a[1]);
path.lineTo((float)c[0], (float)c[1]);
path.lineTo((float)a[0], (float)a[1]);
path.lineTo((float)d[0], (float)d[1]);
} else {
double[] c = transform( element.x2 + aW, element.y2 - aW );
double[] d = transform( element.x2 + aW, element.y2 + aW );
path.moveTo((float)a[0], (float)a[1]);
path.lineTo((float)c[0], (float)c[1]);
path.lineTo((float)a[0], (float)a[1]);
path.lineTo((float)d[0], (float)d[1]);
}
gc.drawPath( path );
path.dispose();
}
public void visit( TextElement element ) {
int x = transformX(element.x);
int y = transformY(element.y);
String text = element.text;
gc.setFont(getFont());
Point textSize = gc.textExtent( text );
x = x - textSize.x/2;
y = y - textSize.y/2;
setForeground( element.color );
setBackground( getBackgroundColor() );
gc.setAdvanced( true );
gc.drawText( text, x, y, true );
}
public void visit(AtomSymbolElement element) {
int x = transformX( element.x );
int y = transformY( element.y);
String text = element.text;
gc.setFont(getFont());
Point textSize = gc.textExtent( text );
x = x - textSize.x/2;
y = y - textSize.y/2;
setForeground( element.color );
setBackground( getBackgroundColor() );
gc.setAdvanced( true );
gc.drawText( text, x, y, false );
Point secondTextSize = gc.textExtent( "H" );
gc.setFont( getSmallFont() );
Point cp = new Point(0,0);
if(element.formalCharge!=0) {
String fc = Integer.toString( element.formalCharge);
fc = (element.formalCharge==1?"+":fc);
fc = (element.formalCharge>1?"+"+fc:fc);
fc = (element.formalCharge==-1?"-":fc);
cp = gc.textExtent( fc );
int fcX = x+textSize.x;
int fcY = y-cp.y/2;
gc.drawText( fc, fcX, fcY, true );
}
if(element.hydrogenCount >0 && model.getShowImplicitHydrogens()) {
Point hc = new Point(0,0);
if(element.hydrogenCount >1) {
hc = gc.textExtent( Integer.toString( element.hydrogenCount ));
}
switch(element.alignment) {
case -1: x = x -secondTextSize.x - hc.x;break;
case 1: x = x + textSize.x+cp.x;break;
case 2: y = y + textSize.y;break;
case -2: y = y+cp.y/2 - Math.max( secondTextSize.y,secondTextSize.y/2 - hc.y);break;
}
if(element.hydrogenCount >1) {
gc.drawText( Integer.toString( element.hydrogenCount),
x + secondTextSize.x, y + secondTextSize.y/2
,true);
}
gc.setFont(getFont());
gc.drawText( "H", x, y ,false);
}
}
public Color toSWTColor(GC graphics,java.awt.Color color) {
if (cleanUp == null) {
cleanUp = new HashMap<java.awt.Color,Color>();
}
if (color == null) {
return graphics.getDevice().getSystemColor(SWT.COLOR_MAGENTA);
}
assert(color != null);
Color otherColor = cleanUp.get(color);
if (otherColor == null) {
otherColor = new Color(graphics.getDevice(),
color.getRed(),
color.getGreen(),
color.getBlue());
cleanUp.put(color,otherColor);
}
return otherColor;
}
public void dispose() {
for (Color c : cleanUp.values()) {
c.dispose();
}
cleanUp.clear();
}
public void visit( ElementGroup elementGroup ) {
for (IRenderingElement element : elementGroup) {
element.accept(this);
}
}
public void setTransform(AffineTransform transform) {
this.transform = transform;
}
public void visitDefault(IRenderingElement element) {
logger.debug("No visitor method implemented for : "
+ element.getClass());
}
public void visit(RectangleElement element) {
if (element.filled) {
setBackground(element.color);
gc.fillRectangle(
transformX(element.x), transformY(element.y),
scaleX(element.width), scaleY(element.height));
} else {
setForeground( element.color );
gc.drawRectangle(
transformX(element.x), transformY(element.y),
scaleX(element.width), scaleY(element.height));
}
}
public void visit(PathElement element) {
setForeground(element.color);
Path path = new Path(gc.getDevice());
boolean first = true;
for(Point2d p: element.points) {
double[] tp = transform( p.x, p.y );
if(first) {
path.moveTo( (float)tp[0], (float)tp[1]);
first = false;
} else {
path.lineTo( (float)tp[0], (float)tp[1]);
}
}
gc.drawPath( path );
path.dispose();
}
public void visit(GeneralPath element) {
setForeground( element.color );
int oldStyle = gc.getLineStyle();
gc.setLineStyle( SWT.LINE_DOT );
Path path = new Path(gc.getDevice());
for(org.openscience.cdk.renderer.elements.path.PathElement e:element.elements) {
float[] v = transform( e.points());
for(float f:v) assert(!Float.isNaN( f ));
switch ( e.type() ) {
case MoveTo: path.moveTo( v[0],v[1] );break;
case LineTo: path.lineTo( v[0], v[1] );break;
case QuadTo: path.quadTo( v[0], v[1], v[2], v[3] );break;
case CubicTo: path.cubicTo( v[0], v[1], v[2], v[3], v[4], v[5] );break;
case Close: path.close();
}
}
gc.drawPath( path );
path.dispose();
gc.setLineStyle( oldStyle );
}
public void visit(IRenderingElement element) {
Method method = getMethod( element );
if (method == null) {
visitDefault(element);
}
else {
try {
method.invoke( this, new Object[] {element} );
} catch ( IllegalArgumentException e ) {
logger.debug(e.getMessage(), e );
visitDefault( element );
} catch ( IllegalAccessException e ) {
logger.debug(e.getMessage(), e );
visitDefault( element );
} catch ( InvocationTargetException e ) {
logger.debug(e.getMessage(), e );
visitDefault( element );
}
}
}
private Method getMethod( IRenderingElement element ) {
Class<?> cl = element.getClass();
while ( !cl.equals( Object.class ) ) {
try {
return this.getClass().getDeclaredMethod( "visit",
new Class[] { cl } );
} catch ( NoSuchMethodException e ) {
cl = cl.getSuperclass();
}
}
logger.debug( "Encounter Object class" );
return null;
}
public void setFontManager( IFontManager fontManager ) {
this.fontManager = (SWTFontManager) fontManager;
}
public void setRendererModel( RendererModel rendererModel ) {
this.model = rendererModel;
}
}