86 lines
2.5 KiB
Java
86 lines
2.5 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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* The letter C is defined by a GeneralPath and the letter and the
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* control points are drawn.
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*
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* @author Frank Klawonn
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* Last change 01.02.2005
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*/
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public class SimpleLetterC extends Frame
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{
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//Constructor
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public SimpleLetterC()
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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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//The lines should have a thickness of 3.0 instead of 1.0.
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BasicStroke bs = new BasicStroke(3.0f);
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g2d.setStroke(bs);
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//The control points for defining the letter.
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int xc1 = 50;
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int yc1 = 250;
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int xc2 = 250;
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int yc2 = 50;
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int xc3 = 50;
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int yc3 = 50;
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int xc4 = 250;
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int yc4 = 450;
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int xc5 = 50;
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int yc5 = 450;
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//Definition and drawing of the two curves that define the letter.
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QuadCurve2D.Double d1 = new QuadCurve2D.Double(xc1,yc1,xc3,yc3,xc2,yc2);
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g2d.draw(d1);
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QuadCurve2D.Double d2 = new QuadCurve2D.Double(xc1,yc1,xc5,yc5,xc4,yc4);
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g2d.draw(d2);
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//Draw the control points.
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drawSmallRect(xc1,yc1,g2d);
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drawSmallRect(xc2,yc2,g2d);
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drawSmallRect(xc3,yc3,g2d);
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drawSmallRect(xc4,yc4,g2d);
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drawSmallRect(xc5,yc5,g2d);
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//Label the control points.
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g2d.setFont(new Font("serif",Font.PLAIN,24));
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g2d.drawString("P1'",xc1+10,yc1+5);
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g2d.drawString("P2'",xc2+10,yc2+10);
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g2d.drawString("P3'",xc3-35,yc3+4);
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g2d.drawString("P4'",xc4+10,yc4+10);
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g2d.drawString("P5'",xc5+10,yc5+10);
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}
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/**
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* Draws a small square around the centre (x,y).
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*
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* @param x x-coordinate of the centre
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* @param y y-coordinate of the centre
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* @param g2d Graphics2D object for drawing
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*/
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public static void drawSmallRect(int x, int y, Graphics2D g2d)
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{
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Rectangle rect = new Rectangle(x-4,y-3,8,8);
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g2d.fill(rect);
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}
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public static void main(String[] argv)
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{
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SimpleLetterC f = new SimpleLetterC();
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f.setTitle("The letter C");
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f.setSize(420,500);
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f.setVisible(true);
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}
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}
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