texttitle.java

jfreechart-1.0.12.zip 可以用来作图

     *
     * @param g2  the graphics device.
     * @param widthRange  the width range.
     * @param heightRange  the height range.
     *
     * @return The content size.
     */
    protected Size2D arrangeRR(Graphics2D g2, Range widthRange,
            Range heightRange) {
        RectangleEdge position = getPosition();
        if (position == RectangleEdge.TOP || position == RectangleEdge.BOTTOM) {
            float maxWidth = (float) widthRange.getUpperBound();
            g2.setFont(this.font);
            this.content = TextUtilities.createTextBlock(this.text, this.font,
                    this.paint, maxWidth, this.maximumLinesToDisplay,
                    new G2TextMeasurer(g2));
            this.content.setLineAlignment(this.textAlignment);
            Size2D contentSize = this.content.calculateDimensions(g2);
            if (this.expandToFitSpace) {
                return new Size2D(maxWidth, contentSize.getHeight());
            }
            else {
                return contentSize;
            }
        }
        else if (position == RectangleEdge.LEFT || position
                == RectangleEdge.RIGHT) {
            float maxWidth = (float) heightRange.getUpperBound();
            g2.setFont(this.font);
            this.content = TextUtilities.createTextBlock(this.text, this.font,
                    this.paint, maxWidth, this.maximumLinesToDisplay,
                    new G2TextMeasurer(g2));
            this.content.setLineAlignment(this.textAlignment);
            Size2D contentSize = this.content.calculateDimensions(g2);

            // transpose the dimensions, because the title is rotated
            if (this.expandToFitSpace) {
                return new Size2D(contentSize.getHeight(), maxWidth);
            }
            else {
                return new Size2D(contentSize.height, contentSize.width);
            }
        }
        else {
            throw new RuntimeException("Unrecognised exception.");
        }
    }

    /**
     * Draws the title on a Java 2D graphics device (such as the screen or a
     * printer).
     *
     * @param g2  the graphics device.
     * @param area  the area allocated for the title.
     */
    public void draw(Graphics2D g2, Rectangle2D area) {
        draw(g2, area, null);
    }

    /**
     * Draws the block within the specified area.
     *
     * @param g2  the graphics device.
     * @param area  the area.
     * @param params  if this is an instance of {@link EntityBlockParams} it
     *                is used to determine whether or not an
     *                {@link EntityCollection} is returned by this method.
     *
     * @return An {@link EntityCollection} containing a chart entity for the
     *         title, or <code>null</code>.
     */
    public Object draw(Graphics2D g2, Rectangle2D area, Object params) {
        if (this.content == null) {
            return null;
        }
        area = trimMargin(area);
        drawBorder(g2, area);
        if (this.text.equals("")) {
            return null;
        }
        ChartEntity entity = null;
        if (params instanceof EntityBlockParams) {
            EntityBlockParams p = (EntityBlockParams) params;
            if (p.getGenerateEntities()) {
                entity = new ChartEntity(area, this.toolTipText, this.urlText);
            }
        }
        area = trimBorder(area);
        if (this.backgroundPaint != null) {
            g2.setPaint(this.backgroundPaint);
            g2.fill(area);
        }
        area = trimPadding(area);
        RectangleEdge position = getPosition();
        if (position == RectangleEdge.TOP || position == RectangleEdge.BOTTOM) {
            drawHorizontal(g2, area);
        }
        else if (position == RectangleEdge.LEFT
                 || position == RectangleEdge.RIGHT) {
            drawVertical(g2, area);
        }
        BlockResult result = new BlockResult();
        if (entity != null) {
            StandardEntityCollection sec = new StandardEntityCollection();
            sec.add(entity);
            result.setEntityCollection(sec);
        }
        return result;
    }

    /**
     * Draws a the title horizontally within the specified area.  This method
     * will be called from the {@link #draw(Graphics2D, Rectangle2D) draw}
     * method.
     *
     * @param g2  the graphics device.
     * @param area  the area for the title.
     */
    protected void drawHorizontal(Graphics2D g2, Rectangle2D area) {
        Rectangle2D titleArea = (Rectangle2D) area.clone();
        g2.setFont(this.font);
        g2.setPaint(this.paint);
        TextBlockAnchor anchor = null;
        float x = 0.0f;
        HorizontalAlignment horizontalAlignment = getHorizontalAlignment();
        if (horizontalAlignment == HorizontalAlignment.LEFT) {
            x = (float) titleArea.getX();
            anchor = TextBlockAnchor.TOP_LEFT;
        }
        else if (horizontalAlignment == HorizontalAlignment.RIGHT) {
            x = (float) titleArea.getMaxX();
            anchor = TextBlockAnchor.TOP_RIGHT;
        }
        else if (horizontalAlignment == HorizontalAlignment.CENTER) {
            x = (float) titleArea.getCenterX();
            anchor = TextBlockAnchor.TOP_CENTER;
        }
        float y = 0.0f;
        RectangleEdge position = getPosition();
        if (position == RectangleEdge.TOP) {
            y = (float) titleArea.getY();
        }
        else if (position == RectangleEdge.BOTTOM) {
            y = (float) titleArea.getMaxY();
            if (horizontalAlignment == HorizontalAlignment.LEFT) {
                anchor = TextBlockAnchor.BOTTOM_LEFT;
            }
            else if (horizontalAlignment == HorizontalAlignment.CENTER) {
                anchor = TextBlockAnchor.BOTTOM_CENTER;
            }
            else if (horizontalAlignment == HorizontalAlignment.RIGHT) {
                anchor = TextBlockAnchor.BOTTOM_RIGHT;
            }
        }
        this.content.draw(g2, x, y, anchor);
    }

    /**
     * Draws a the title vertically within the specified area.  This method
     * will be called from the {@link #draw(Graphics2D, Rectangle2D) draw}
     * method.
     *
     * @param g2  the graphics device.
     * @param area  the area for the title.
     */
    protected void drawVertical(Graphics2D g2, Rectangle2D area) {
        Rectangle2D titleArea = (Rectangle2D) area.clone();
        g2.setFont(this.font);
        g2.setPaint(this.paint);
        TextBlockAnchor anchor = null;
        float y = 0.0f;
        VerticalAlignment verticalAlignment = getVerticalAlignment();
        if (verticalAlignment == VerticalAlignment.TOP) {
            y = (float) titleArea.getY();
            anchor = TextBlockAnchor.TOP_RIGHT;
        }
        else if (verticalAlignment == VerticalAlignment.BOTTOM) {
            y = (float) titleArea.getMaxY();
            anchor = TextBlockAnchor.TOP_LEFT;
        }
        else if (verticalAlignment == VerticalAlignment.CENTER) {
            y = (float) titleArea.getCenterY();
            anchor = TextBlockAnchor.TOP_CENTER;
        }
        float x = 0.0f;
        RectangleEdge position = getPosition();
        if (position == RectangleEdge.LEFT) {
            x = (float) titleArea.getX();
        }
        else if (position == RectangleEdge.RIGHT) {
            x = (float) titleArea.getMaxX();
            if (verticalAlignment == VerticalAlignment.TOP) {
                anchor = TextBlockAnchor.BOTTOM_RIGHT;
            }
            else if (verticalAlignment == VerticalAlignment.CENTER) {
                anchor = TextBlockAnchor.BOTTOM_CENTER;
            }
            else if (verticalAlignment == VerticalAlignment.BOTTOM) {
                anchor = TextBlockAnchor.BOTTOM_LEFT;
            }
        }
        this.content.draw(g2, x, y, anchor, x, y, -Math.PI / 2.0);
    }

    /**
     * Tests this title for equality with another object.
     *
     * @param obj  the object (<code>null</code> permitted).
     *
     * @return <code>true</code> or <code>false</code>.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof TextTitle)) {
            return false;
        }
        TextTitle that = (TextTitle) obj;
        if (!ObjectUtilities.equal(this.text, that.text)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.font, that.font)) {
            return false;
        }
        if (!PaintUtilities.equal(this.paint, that.paint)) {
            return false;
        }
        if (this.textAlignment != that.textAlignment) {
            return false;
        }
        if (!PaintUtilities.equal(this.backgroundPaint, that.backgroundPaint)) {
            return false;
        }
        if (this.maximumLinesToDisplay != that.maximumLinesToDisplay) {
            return false;
        }
        if (this.expandToFitSpace != that.expandToFitSpace) {
            return false;
        }
        if (!ObjectUtilities.equal(this.toolTipText, that.toolTipText)) {
            return false;
        }
        if (!ObjectUtilities.equal(this.urlText, that.urlText)) {
            return false;
        }
        return super.equals(obj);
    }

    /**
     * Returns a hash code.
     *
     * @return A hash code.
     */
    public int hashCode() {
        int result = super.hashCode();
        result = 29 * result + (this.text != null ? this.text.hashCode() : 0);
        result = 29 * result + (this.font != null ? this.font.hashCode() : 0);
        result = 29 * result + (this.paint != null ? this.paint.hashCode() : 0);
        result = 29 * result + (this.backgroundPaint != null
                ? this.backgroundPaint.hashCode() : 0);
        return result;
    }

    /**
     * Returns a clone of this object.
     *
     * @return A clone.
     *
     * @throws CloneNotSupportedException never.
     */
    public Object clone() throws CloneNotSupportedException {
        return super.clone();
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the output stream.
     *
     * @throws IOException  if there is an I/O error.
     */
    private void writeObject(ObjectOutputStream stream) throws IOException {
        stream.defaultWriteObject();
        SerialUtilities.writePaint(this.paint, stream);
        SerialUtilities.writePaint(this.backgroundPaint, stream);
    }

    /**
     * Provides serialization support.
     *
     * @param stream  the input stream.
     *
     * @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.paint = SerialUtilities.readPaint(stream);
        this.backgroundPaint = SerialUtilities.readPaint(stream);
    }

}