chartpainter.java

来自「java swing 开发代码」· Java 代码 · 共 42 行

// ChartPainter.java
// A simple chart-drawing UI base class. This class tracks the basic fonts
// and colors for various types of charts including pie and bar. The paint()
// method is abstract and must be implemented by subclasses for each type.
//
package	jswing.ch16;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.*;

public abstract class ChartPainter extends ComponentUI {

  protected Font textFont = new Font("Serif", Font.PLAIN, 12);
  protected Color textColor = Color.black;
  protected Color colors[] = new Color[] {
    Color.red, Color.blue, Color.yellow, Color.black, Color.green,
    Color.white, Color.gray, Color.cyan, Color.magenta, Color.darkGray
  };
  protected double values[] = new double[0];
  protected String labels[] = new String[0];

  public void setTextFont(Font f) { textFont = f; }
  public Font getTextFont() { return textFont; }

  public void setColor(Color[] clist) { colors = clist; }
  public Color[] getColor() { return colors; }

  public void setColor(int index, Color c) { colors[index] = c; }
  public Color getColor(int index) { return colors[index]; }

  public void setTextColor(Color c) { textColor = c; }
  public Color getTextColor() { return textColor; }

  public void setLabels(String[] l) { labels = l; }
  public void setValues(double[] v) { values = v; }

  public abstract int indexOfEntryAt(MouseEvent me);
  public abstract void paint(Graphics g, JComponent c);
}