www.pudn.com > JSystemTrader.zip > CircledTextAnnotation.java

package com.jsystemtrader.chart; 
 
import java.awt.*; 
import java.awt.geom.*; 
 
import org.jfree.chart.annotations.*; 
import org.jfree.chart.axis.*; 
import org.jfree.chart.plot.*; 
import org.jfree.text.*; 
import org.jfree.ui.*; 
 
/** 
 * Defines the shape of the markers which show order executions. In this 
 * implementation, the shape is a solid circle with a letter "L", "S", or "F" 
 * inside the circle, designating the "long", "short", and "flat" positions 
 * resulting from order executions. 
 */ 
public class CircledTextAnnotation extends XYTextAnnotation { 
    private final int radius; 
    private Color color; 
    private final Stroke circleStroke = new BasicStroke(1); 
 
    public CircledTextAnnotation(String text, double x, double y, int radius) { 
        super(text, x, y); 
        this.radius = radius; 
    } 
 
    public void setBkColor(Color color) { 
        this.color = color; 
    } 
 
    public void draw(Graphics2D g2, XYPlot plot, Rectangle2D dataArea, ValueAxis domainAxis, ValueAxis rangeAxis, 
                     int rendererIndex, PlotRenderingInfo info) { 
 
        PlotOrientation orientation = plot.getOrientation(); 
        RectangleEdge domainEdge = Plot.resolveDomainAxisLocation(plot.getDomainAxisLocation(), orientation); 
        RectangleEdge rangeEdge = Plot.resolveRangeAxisLocation(plot.getRangeAxisLocation(), orientation); 
 
        float anchorX = (float) domainAxis.valueToJava2D(getX(), dataArea, domainEdge); 
        float anchorY = (float) rangeAxis.valueToJava2D(getY(), dataArea, rangeEdge); 
 
        if (orientation == PlotOrientation.HORIZONTAL) { 
            float tempAnchor = anchorX; 
            anchorX = anchorY; 
            anchorY = tempAnchor; 
        } 
 
        g2.setColor(color); 
        double x = anchorX - radius; 
        double y = anchorY - radius; 
        double width = radius * 2.0; 
        double height = radius * 2.0; 
 
        g2.fill(new Ellipse2D.Double(x, y, width, height)); 
 
        g2.setColor(Color.WHITE); 
        g2.setStroke(circleStroke); 
        g2.drawOval( (int) x, (int) y, (int) width, (int) height); 
 
        g2.setFont(getFont()); 
        g2.setPaint(getPaint()); 
        TextUtilities.drawRotatedString(getText(), g2, anchorX, anchorY, getTextAnchor(), getRotationAngle(), 
                                        getRotationAnchor()); 
        Shape hotspot = TextUtilities.calculateRotatedStringBounds(getText(), g2, anchorX, anchorY, getTextAnchor(), 
                getRotationAngle(), getRotationAnchor()); 
 
        String toolTip = getToolTipText(); 
        String url = getURL(); 
        if (toolTip != null || url != null) { 
            addEntity(info, hotspot, rendererIndex, toolTip, url); 
        } 
    } 
}