99 lines
3.3 KiB
Java
99 lines
3.3 KiB
Java
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import java.awt.*;
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import java.awt.geom.*;
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/**
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* Examples for the use of different line endings and joins
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* between lines.
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*
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* @author Frank Klawonn
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* Last change 10.05.2005
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*/
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public class LineEndings extends Frame
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{
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/**
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* Constructor
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*/
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LineEndings()
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{
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//Enables the closing of the window.
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addWindowListener(new MyFinishWindow());
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}
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public void paint(Graphics g)
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{
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Graphics2D g2d = (Graphics2D) g;
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//Use of antialiasing to have nicer lines.
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g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
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//A polyline from (startx,starty) via (tipx,tipy) to (endx,endy) should be generated.
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int startx = 50;
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int starty = 100;
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int tipx = 150;
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int tipy = 250;
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int endx = 180;
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int endy = 100;
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//The polyline is defined as a GeneralPath.
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GeneralPath gp = new GeneralPath();
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gp.moveTo(startx,starty);
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gp.lineTo(tipx,tipy);
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gp.lineTo(endx,endy);
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//A BasicStroke is needed to modify the line endings and the
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//join at (tipx,tipy).
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BasicStroke bs;
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//The polyline should be drawn more than using variations of the
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//BasicStroke. offset specifies how much the next variant
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//of the polyline should be shifted to the right.
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int offSet = 180;
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int accumulatedOffset = 0;
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//This transformation shifts the polyline (even the whole
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//drawing object g2d to the right.
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AffineTransform translation = new AffineTransform();
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//In the first version the two line segments of the polyline are
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//drawn independently as single lines without taking care of any
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//special kind of join.
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bs = new BasicStroke(30.0f);
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g2d.setStroke(bs);
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g2d.drawLine(startx,starty,tipx,tipy);
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g2d.drawLine(tipx,tipy,endx,endy);
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//Drawing the polyline using the default setting (except for the
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//exaggerated line thickness).
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accumulatedOffset = accumulatedOffset + offSet;
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translation.setToTranslation(accumulatedOffset,0);
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g2d.setTransform(translation);
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bs = new BasicStroke(30.0f,BasicStroke.CAP_BUTT,BasicStroke.JOIN_MITER);
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g2d.setStroke(bs);
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g2d.draw(gp);
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//Drawing the polyline with round endings and a cut-off join.
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accumulatedOffset = accumulatedOffset + offSet;
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translation.setToTranslation(accumulatedOffset,0);
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g2d.setTransform(translation);
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bs = new BasicStroke(30.0f,BasicStroke.CAP_ROUND,BasicStroke.JOIN_BEVEL);
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g2d.setStroke(bs);
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g2d.draw(gp);
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//Drawing the polyline with prolonged, cut-off endings and a round join.
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accumulatedOffset = accumulatedOffset + offSet;
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translation.setToTranslation(accumulatedOffset,0);
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g2d.setTransform(translation);
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bs = new BasicStroke(30.0f,BasicStroke.CAP_SQUARE,BasicStroke.JOIN_ROUND);
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g2d.setStroke(bs);
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g2d.draw(gp);
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}
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public static void main(String[] argv)
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{
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LineEndings f = new LineEndings();
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f.setTitle("Line endings");
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f.setSize(800,350);
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f.setVisible(true);
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}
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}
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