legenditem.java

制作图表的好工具

     * @param linePaint  the line paint (<code>null</code> not permitted).
     */
    public LegendItem(AttributedString label, String description, 
                      String toolTipText, String urlText, 
                      Shape line, Stroke lineStroke, Paint linePaint) {
        
        this(label, description, toolTipText, urlText,
                /* shape visible = */ false, UNUSED_SHAPE,
                /* shape filled = */ false, Color.black,
                /* shape outlined = */ false, Color.black, UNUSED_STROKE,
                /* line visible = */ true, line, lineStroke, linePaint
        );
    }
    
    /**
     * Creates a new legend item.
     *
     * @param label  the label (<code>null</code> not permitted).
     * @param description  the description (not currently used, 
     *        <code>null</code> permitted).
     * @param toolTipText  the tool tip text (<code>null</code> permitted).
     * @param urlText  the URL text (<code>null</code> permitted).
     * @param shapeVisible  a flag that controls whether or not the shape is 
     *                      displayed.
     * @param shape  the shape (<code>null</code> permitted).
     * @param shapeFilled  a flag that controls whether or not the shape is 
     *                     filled.
     * @param fillPaint  the fill paint (<code>null</code> not permitted).
     * @param shapeOutlineVisible  a flag that controls whether or not the 
     *                             shape is outlined.
     * @param outlinePaint  the outline paint (<code>null</code> not permitted).
     * @param outlineStroke  the outline stroke (<code>null</code> not 
     *                       permitted).
     * @param lineVisible  a flag that controls whether or not the line is 
     *                     visible.
     * @param line  the line.
     * @param lineStroke  the stroke (<code>null</code> not permitted).
     * @param linePaint  the line paint (<code>null</code> not permitted).
     */
    public LegendItem(AttributedString label, String description,
                      String toolTipText, String urlText,
                      boolean shapeVisible, Shape shape,
                      boolean shapeFilled, Paint fillPaint, 
                      boolean shapeOutlineVisible, Paint outlinePaint,
                      Stroke outlineStroke,
                      boolean lineVisible, Shape line, Stroke lineStroke,
                      Paint linePaint) {
        
        if (label == null) {
            throw new IllegalArgumentException("Null 'label' argument.");   
        }
        if (fillPaint == null) {
            throw new IllegalArgumentException("Null 'fillPaint' argument.");   
        }
        if (lineStroke == null) {
            throw new IllegalArgumentException("Null 'lineStroke' argument.");
        }
        if (outlinePaint == null) {
            throw new IllegalArgumentException("Null 'outlinePaint' argument.");
        }
        if (outlineStroke == null) {
            throw new IllegalArgumentException(
                "Null 'outlineStroke' argument.");   
        }
        this.label = characterIteratorToString(label.getIterator());
        this.attributedLabel = label;
        this.description = description;
        this.shapeVisible = shapeVisible;
        this.shape = shape;
        this.shapeFilled = shapeFilled;
        this.fillPaint = fillPaint;
        this.shapeOutlineVisible = shapeOutlineVisible;
        this.outlinePaint = outlinePaint;
        this.outlineStroke = outlineStroke;
        this.lineVisible = lineVisible;
        this.line = line;
        this.lineStroke = lineStroke;
        this.linePaint = linePaint;
        this.toolTipText = toolTipText;
        this.urlText = urlText;
    }

    /**
     * Returns a string containing the characters from the given iterator.
     * 
     * @param iterator  the iterator (<code>null</code> not permitted).
     * 
     * @return A string.
     */
    private String characterIteratorToString(CharacterIterator iterator) {
        int endIndex = iterator.getEndIndex();
        int beginIndex = iterator.getBeginIndex();
        int count = endIndex - beginIndex;
        if (count <= 0) {
            return "";
        }
        char[] chars = new char[count];
        int i = 0;
        char c = iterator.first();
        while (c != CharacterIterator.DONE) {
            chars[i] = c;
            i++;
            c = iterator.next();
        }
        return new String(chars);
    }
    
    /**
     * Returns the label.
     *
     * @return The label (never <code>null</code>).
     */
    public String getLabel() {
        return this.label;
    }

    /**
     * Returns the attributed label.
     *
     * @return The attributed label (possibly <code>null</code>).
     */
    public AttributedString getAttributedLabel() {
        return this.attributedLabel;
    }

    /**
     * Returns the description for the legend item.
     * 
     * @return The description.
     */
    public String getDescription() {
        return this.description;   
    }
    
    /**
     * Returns the tool tip text.
     * 
     * @return The tool tip text (possibly <code>null</code>).
     */
    public String getToolTipText() {
        return this.toolTipText;   
    }
    
    /**
     * Returns the URL text.
     * 
     * @return The URL text (possibly <code>null</code>).
     */
    public String getURLText() {
        return this.urlText; 
    }
    
    /**
     * Returns a flag that indicates whether or not the shape is visible.
     * 
     * @return A boolean.
     */
    public boolean isShapeVisible() {
        return this.shapeVisible;
    }
    
    /**
     * Returns the shape used to label the series represented by this legend 
     * item.
     *
     * @return The shape (never <code>null</code>).
     */
    public Shape getShape() {
        return this.shape;
    }
    
    /**
     * Returns a flag that controls whether or not the shape is filled.
     * 
     * @return A boolean.
     */
    public boolean isShapeFilled() {
        return this.shapeFilled;
    }

    /**
     * Returns the fill paint.
     *
     * @return The fill paint (never <code>null</code>).
     */
    public Paint getFillPaint() {
        return this.fillPaint;
    }

    /**
     * Returns the flag that controls whether or not the shape outline
     * is visible.
     * 
     * @return A boolean.
     */
    public boolean isShapeOutlineVisible() {
        return this.shapeOutlineVisible;
    }
    
    /**
     * Returns the line stroke for the series.
     *
     * @return The stroke (never <code>null</code>).
     */
    public Stroke getLineStroke() {
        return this.lineStroke;
    }
    
    /**
     * Returns the paint used for lines.
     * 
     * @return The paint.
     */
    public Paint getLinePaint() {
        return this.linePaint;
    }
    
    /**
     * Returns the outline paint.
     *
     * @return The outline paint (never <code>null</code>).
     */
    public Paint getOutlinePaint() {
        return this.outlinePaint;
    }

    /**
     * Returns the outline stroke.
     *
     * @return The outline stroke (never <code>null</code>).
     */
    public Stroke getOutlineStroke() {
        return this.outlineStroke;
    }
    
    /**
     * Returns a flag that indicates whether or not the line is visible.
     * 
     * @return A boolean.
     */
    public boolean isLineVisible() {
        return this.lineVisible;
    }
    
    /**
     * Returns the line.
     * 
     * @return The line.
     */
    public Shape getLine() {
        return this.line;
    }
    
    /**
     * Tests this item for equality with an arbitrary object.
     * 
     * @param obj  the object (<code>null</code> permitted).
     * 
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;   
        }
        if (!(obj instanceof LegendItem)) {
                return false;
        }
        LegendItem that = (LegendItem) obj;
        if (!this.label.equals(that.label)) {
            return false;
        }
        if (!AttributedStringUtilities.equal(this.attributedLabel, 
                that.attributedLabel)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.description, that.description)) {
            return false;
        }
        if (this.shapeVisible != that.shapeVisible) {
            return false;
        }
        if (!ShapeUtilities.equal(this.shape, that.shape)) {
            return false;
        }
        if (this.shapeFilled != that.shapeFilled) {
            return false;
        }
        if (!this.fillPaint.equals(that.fillPaint)) {
            return false;   
        }
        if (this.shapeOutlineVisible != that.shapeOutlineVisible) {
            return false;
        }
        if (!this.outlineStroke.equals(that.outlineStroke)) {
            return false;   
        }
        if (!this.outlinePaint.equals(that.outlinePaint)) {
            return false;   
        }
        if (!this.lineVisible == that.lineVisible) {
            return false;
        }
        if (!ShapeUtilities.equal(this.line, that.line)) {
            return false;
        }
        if (!this.lineStroke.equals(that.lineStroke)) {
            return false;   
        }
        if (!this.linePaint.equals(that.linePaint)) {
            return false;
        }
        return true;
    }
    
    /**
     * Provides serialization support.
     *
     * @param stream  the output stream (<code>null</code> not permitted).
     *
     * @throws IOException  if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writeShape(this.shape, stream);
        SerialUtilities.writePaint(this.fillPaint, stream);
        SerialUtilities.writeStroke(this.outlineStroke, stream);
        SerialUtilities.writePaint(this.outlinePaint, stream);
        SerialUtilities.writeShape(this.line, stream);
        SerialUtilities.writeStroke(this.lineStroke, stream);
        SerialUtilities.writePaint(this.linePaint, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream (<code>null</code> not permitted).
     *
     * @throws IOException  if there is an I/O error.
     * @throws ClassNotFoundException  if there is a classpath problem.
     */
    private void readObject(ObjectInputStream stream) 
        throws IOException, ClassNotFoundException {
        stream.defaultReadObject();
        this.shape = SerialUtilities.readShape(stream);
        this.fillPaint = SerialUtilities.readPaint(stream);
        this.outlineStroke = SerialUtilities.readStroke(stream);
        this.outlinePaint = SerialUtilities.readPaint(stream);
        this.line = SerialUtilities.readShape(stream);
        this.lineStroke = SerialUtilities.readStroke(stream);
        this.linePaint = SerialUtilities.readPaint(stream);
    }
    
}