Example usage for org.jfree.chart.labels CategoryItemLabelGenerator generateLabel

Introduction

In this page you can find the example usage for org.jfree.chart.labels CategoryItemLabelGenerator generateLabel.

Prototype

public String generateLabel(CategoryDataset dataset, int row, int column);

Source Link

Document

Generates a label for the specified item.

Usage

From source file:edu.dlnu.liuwenpeng.render.BarRenderer.java

/**    
* Draws an item label.  This method is overridden so that the bar can be    
* used to calculate the label anchor point.    
*    //from  www.  ja v a2  s.  c o m
* @param g2  the graphics device.    
* @param data  the dataset.    
* @param row  the row.    
* @param column  the column.    
* @param plot  the plot.    
* @param generator  the label generator.    
* @param bar  the bar.    
* @param negative  a flag indicating a negative value.    
*/
protected void drawItemLabel(Graphics2D g2, CategoryDataset data, int row, int column, CategoryPlot plot,
        CategoryItemLabelGenerator generator, Rectangle2D bar, boolean negative) {

    String label = generator.generateLabel(data, row, column);
    if (label == null) {
        return; // nothing to do    
    }

    Font labelFont = getItemLabelFont(row, column);
    g2.setFont(labelFont);
    Paint paint = getItemLabelPaint(row, column);
    g2.setPaint(paint);

    // find out where to place the label...    
    ItemLabelPosition position = null;
    if (!negative) {
        position = getPositiveItemLabelPosition(row, column);
    } else {
        position = getNegativeItemLabelPosition(row, column);
    }

    // work out the label anchor point...    
    Point2D anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(), bar, plot.getOrientation());

    if (isInternalAnchor(position.getItemLabelAnchor())) {
        Shape bounds = TextUtilities.calculateRotatedStringBounds(label, g2, (float) anchorPoint.getX(),
                (float) anchorPoint.getY(), position.getTextAnchor(), position.getAngle(),
                position.getRotationAnchor());

        if (bounds != null) {
            if (!bar.contains(bounds.getBounds2D())) {
                if (!negative) {
                    position = getPositiveItemLabelPositionFallback();
                } else {
                    position = getNegativeItemLabelPositionFallback();
                }
                if (position != null) {
                    anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(), bar,
                            plot.getOrientation());
                }
            }
        }

    }

    if (position != null) {
        TextUtilities.drawRotatedString(label, g2, (float) anchorPoint.getX(), (float) anchorPoint.getY(),
                position.getTextAnchor(), position.getAngle(), position.getRotationAnchor());
    }
}

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From source file:KIDLYRenderer.java

/**
 * Draws an item label.  This method is overridden so that the bar can be
 * used to calculate the label anchor point.
 *
 * @param g2  the graphics device./*  w ww .ja v  a 2 s.com*/
 * @param data  the dataset.
 * @param row  the row.
 * @param column  the column.
 * @param plot  the plot.
 * @param generator  the label generator.
 * @param bar  the bar.
 * @param negative  a flag indicating a negative value.
 */
protected void drawItemLabel(Graphics2D g2, CategoryDataset data, int row, int column, CategoryPlot plot,
        CategoryItemLabelGenerator generator, Rectangle2D bar, boolean negative) {

    String label = generator.generateLabel(data, row, column);
    if (label == null) {
        return; // nothing to do
    }

    Font labelFont = getItemLabelFont(row, column);
    g2.setFont(labelFont);
    Paint paint = getItemLabelPaint(row, column);
    g2.setPaint(paint);

    // find out where to place the label...
    ItemLabelPosition position = null;
    if (!negative) {
        position = getPositiveItemLabelPosition(row, column);
    } else {
        position = getNegativeItemLabelPosition(row, column);
    }

    // work out the label anchor point...
    Point2D anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(), bar, plot.getOrientation());

    if (isInternalAnchor(position.getItemLabelAnchor())) {
        Shape bounds = TextUtilities.calculateRotatedStringBounds(label, g2, (float) anchorPoint.getX(),
                (float) anchorPoint.getY(), position.getTextAnchor(), position.getAngle(),
                position.getRotationAnchor());

        if (bounds != null) {
            if (!bar.contains(bounds.getBounds2D())) {
                if (!negative) {
                    position = getPositiveItemLabelPositionFallback();
                } else {
                    position = getNegativeItemLabelPositionFallback();
                }
                if (position != null) {
                    anchorPoint = calculateLabelAnchorPoint(position.getItemLabelAnchor(), bar,
                            plot.getOrientation());
                }
            }
        }

    }

    if (position != null) {
        TextUtilities.drawRotatedString(label, g2, (float) anchorPoint.getX(), (float) anchorPoint.getY(),
                position.getTextAnchor(), position.getAngle(), position.getRotationAnchor());
    }
}

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