Example usage for org.jfree.chart.plot CategoryPlot getBackgroundAlpha

Introduction

In this page you can find the example usage for org.jfree.chart.plot CategoryPlot getBackgroundAlpha.

Prototype

public float getBackgroundAlpha() 

Source Link

Document

Returns the alpha transparency of the plot area background.

Usage

From source file:com.controlj.addon.gwttree.server.OpaqueBarRenderer3D.java

@Override
public void drawBackground(Graphics2D g2, CategoryPlot plot, Rectangle2D dataArea) {

    float x0 = (float) dataArea.getX();
    float x1 = x0 + (float) Math.abs(getXOffset());
    float x3 = (float) dataArea.getMaxX();
    float x2 = x3 - (float) Math.abs(getXOffset());

    float y0 = (float) dataArea.getMaxY();
    float y1 = y0 - (float) Math.abs(getYOffset());
    float y3 = (float) dataArea.getMinY();
    float y2 = y3 + (float) Math.abs(getYOffset());

    GeneralPath clip = new GeneralPath();
    clip.moveTo(x0, y0);//ww w .  java  2  s .c om
    clip.lineTo(x0, y2);
    clip.lineTo(x1, y3);
    clip.lineTo(x3, y3);
    clip.lineTo(x3, y1);
    clip.lineTo(x2, y0);
    clip.closePath();

    Composite originalComposite = g2.getComposite();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, plot.getBackgroundAlpha()));

    // fill background...
    Paint backgroundPaint = plot.getBackgroundPaint();
    if (backgroundPaint != null) {
        g2.setPaint(backgroundPaint);
        g2.fill(clip);
    }

    GeneralPath bottomWall = new GeneralPath();
    bottomWall.moveTo(x0, y0);
    bottomWall.lineTo(x1, y1);
    bottomWall.lineTo(x3, y1);
    bottomWall.lineTo(x2, y0);
    bottomWall.closePath();
    g2.setPaint(getWallPaint());
    g2.fill(bottomWall);

    // draw background image, if there is one...
    Image backgroundImage = plot.getBackgroundImage();
    if (backgroundImage != null) {
        Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX() + getXOffset(), dataArea.getY(),
                dataArea.getWidth() - getXOffset(), dataArea.getHeight() - getYOffset());
        plot.drawBackgroundImage(g2, adjusted);
    }

    g2.setComposite(originalComposite);

}

---