59 lines
1.9 KiB
Java
59 lines
1.9 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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* An example for the use of GradientPaint (colour interpolation)
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*
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* @author Frank Klawonn
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* Last change 27.05.2005
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*/
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public class GradientPaintExample extends Frame
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{
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/**
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* Constructor
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*/
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public GradientPaintExample()
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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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//A square to be filled by colour interpolation without repetition.
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Rectangle2D.Double rect1 = new Rectangle2D.Double(50,50,300,300);
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//The two colours (red and green) for the gradient paint.
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Color c1 = new Color(1.0f,0.0f,0.0f);
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Color c2 = new Color(0.0f,1.0f,0.0f);
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//The gradient from red to green is parallel to the diagonal of the
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//square to be filled. The gradient does not start and end at the corners,
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//but inside the square. The colour gradient is not repeated so that the
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//the upper left part of the square is red and the lower right part is
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//green.
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GradientPaint gradPaint1 = new GradientPaint(150,150,c1,250,250,c2,false);
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g2d.setPaint(gradPaint1);
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g2d.fill(rect1);
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//A square to be filled by repeated colour interpolation.
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Rectangle2D.Double rect2 = new Rectangle2D.Double(400,50,300,300);
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//The colour gradient is defined in the same way as for the first square.
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//However, this time the colour gradient is applied repeatedly.
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GradientPaint gradPaint2 = new GradientPaint(500,150,c1,600,250,c2,true);
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g2d.setPaint(gradPaint2);
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g2d.fill(rect2);
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}
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public static void main(String[] argv)
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{
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GradientPaintExample f = new GradientPaintExample();
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f.setTitle("Colour gradient");
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f.setSize(800,500);
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f.setVisible(true);
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}
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}
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