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jfreechart1。0。2的api。

<FONT color="green">421</FONT>         * Arranges the contents of the block, within the given constraints, and <a name="line.421"></a>
<FONT color="green">422</FONT>         * returns the block size.<a name="line.422"></a>
<FONT color="green">423</FONT>         * <a name="line.423"></a>
<FONT color="green">424</FONT>         * @param g2  the graphics device.<a name="line.424"></a>
<FONT color="green">425</FONT>         * @param constraint  the constraint (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.425"></a>
<FONT color="green">426</FONT>         * <a name="line.426"></a>
<FONT color="green">427</FONT>         * @return The block size (in Java2D units, never &lt;code&gt;null&lt;/code&gt;).<a name="line.427"></a>
<FONT color="green">428</FONT>         */<a name="line.428"></a>
<FONT color="green">429</FONT>        public Size2D arrange(Graphics2D g2, RectangleConstraint constraint) {<a name="line.429"></a>
<FONT color="green">430</FONT>            RectangleConstraint cc = toContentConstraint(constraint);<a name="line.430"></a>
<FONT color="green">431</FONT>            LengthConstraintType w = cc.getWidthConstraintType();<a name="line.431"></a>
<FONT color="green">432</FONT>            LengthConstraintType h = cc.getHeightConstraintType();<a name="line.432"></a>
<FONT color="green">433</FONT>            Size2D contentSize = null;<a name="line.433"></a>
<FONT color="green">434</FONT>            if (w == LengthConstraintType.NONE) {<a name="line.434"></a>
<FONT color="green">435</FONT>                if (h == LengthConstraintType.NONE) {<a name="line.435"></a>
<FONT color="green">436</FONT>                    throw new RuntimeException("Not yet implemented."); <a name="line.436"></a>
<FONT color="green">437</FONT>                }<a name="line.437"></a>
<FONT color="green">438</FONT>                else if (h == LengthConstraintType.RANGE) {<a name="line.438"></a>
<FONT color="green">439</FONT>                    throw new RuntimeException("Not yet implemented."); <a name="line.439"></a>
<FONT color="green">440</FONT>                }<a name="line.440"></a>
<FONT color="green">441</FONT>                else if (h == LengthConstraintType.FIXED) {<a name="line.441"></a>
<FONT color="green">442</FONT>                    throw new RuntimeException("Not yet implemented.");                 <a name="line.442"></a>
<FONT color="green">443</FONT>                }            <a name="line.443"></a>
<FONT color="green">444</FONT>            }<a name="line.444"></a>
<FONT color="green">445</FONT>            else if (w == LengthConstraintType.RANGE) {<a name="line.445"></a>
<FONT color="green">446</FONT>                if (h == LengthConstraintType.NONE) {<a name="line.446"></a>
<FONT color="green">447</FONT>                    throw new RuntimeException("Not yet implemented."); <a name="line.447"></a>
<FONT color="green">448</FONT>                }<a name="line.448"></a>
<FONT color="green">449</FONT>                else if (h == LengthConstraintType.RANGE) {<a name="line.449"></a>
<FONT color="green">450</FONT>                    contentSize = arrangeRR(g2, cc.getWidthRange(), <a name="line.450"></a>
<FONT color="green">451</FONT>                            cc.getHeightRange()); <a name="line.451"></a>
<FONT color="green">452</FONT>                }<a name="line.452"></a>
<FONT color="green">453</FONT>                else if (h == LengthConstraintType.FIXED) {<a name="line.453"></a>
<FONT color="green">454</FONT>                    throw new RuntimeException("Not yet implemented.");                 <a name="line.454"></a>
<FONT color="green">455</FONT>                }<a name="line.455"></a>
<FONT color="green">456</FONT>            }<a name="line.456"></a>
<FONT color="green">457</FONT>            else if (w == LengthConstraintType.FIXED) {<a name="line.457"></a>
<FONT color="green">458</FONT>                if (h == LengthConstraintType.NONE) {<a name="line.458"></a>
<FONT color="green">459</FONT>                    throw new RuntimeException("Not yet implemented."); <a name="line.459"></a>
<FONT color="green">460</FONT>                }<a name="line.460"></a>
<FONT color="green">461</FONT>                else if (h == LengthConstraintType.RANGE) {<a name="line.461"></a>
<FONT color="green">462</FONT>                    throw new RuntimeException("Not yet implemented."); <a name="line.462"></a>
<FONT color="green">463</FONT>                }<a name="line.463"></a>
<FONT color="green">464</FONT>                else if (h == LengthConstraintType.FIXED) {<a name="line.464"></a>
<FONT color="green">465</FONT>                    throw new RuntimeException("Not yet implemented.");                 <a name="line.465"></a>
<FONT color="green">466</FONT>                }<a name="line.466"></a>
<FONT color="green">467</FONT>            }<a name="line.467"></a>
<FONT color="green">468</FONT>            return new Size2D(calculateTotalWidth(contentSize.getWidth()),<a name="line.468"></a>
<FONT color="green">469</FONT>                    calculateTotalHeight(contentSize.getHeight()));<a name="line.469"></a>
<FONT color="green">470</FONT>        }<a name="line.470"></a>
<FONT color="green">471</FONT>        <a name="line.471"></a>
<FONT color="green">472</FONT>        /**<a name="line.472"></a>
<FONT color="green">473</FONT>         * Returns the content size for the title.  This will reflect the fact that<a name="line.473"></a>
<FONT color="green">474</FONT>         * a text title positioned on the left or right of a chart will be rotated<a name="line.474"></a>
<FONT color="green">475</FONT>         * 90 degrees.<a name="line.475"></a>
<FONT color="green">476</FONT>         * <a name="line.476"></a>
<FONT color="green">477</FONT>         * @param g2  the graphics device.<a name="line.477"></a>
<FONT color="green">478</FONT>         * @param widthRange  the width range.<a name="line.478"></a>
<FONT color="green">479</FONT>         * @param heightRange  the height range.<a name="line.479"></a>
<FONT color="green">480</FONT>         * <a name="line.480"></a>
<FONT color="green">481</FONT>         * @return The content size.<a name="line.481"></a>
<FONT color="green">482</FONT>         */<a name="line.482"></a>
<FONT color="green">483</FONT>        protected Size2D arrangeRR(Graphics2D g2, Range widthRange, <a name="line.483"></a>
<FONT color="green">484</FONT>                Range heightRange) {<a name="line.484"></a>
<FONT color="green">485</FONT>            RectangleEdge position = getPosition();<a name="line.485"></a>
<FONT color="green">486</FONT>            if (position == RectangleEdge.TOP || position == RectangleEdge.BOTTOM) {<a name="line.486"></a>
<FONT color="green">487</FONT>                float maxWidth = (float) widthRange.getUpperBound();<a name="line.487"></a>
<FONT color="green">488</FONT>                g2.setFont(this.font);<a name="line.488"></a>
<FONT color="green">489</FONT>                this.content = TextUtilities.createTextBlock(this.text, this.font, <a name="line.489"></a>
<FONT color="green">490</FONT>                        this.paint, maxWidth, new G2TextMeasurer(g2));<a name="line.490"></a>
<FONT color="green">491</FONT>                this.content.setLineAlignment(this.textAlignment);<a name="line.491"></a>
<FONT color="green">492</FONT>                Size2D contentSize = this.content.calculateDimensions(g2);<a name="line.492"></a>
<FONT color="green">493</FONT>                if (this.expandToFitSpace) {<a name="line.493"></a>
<FONT color="green">494</FONT>                    return new Size2D(maxWidth, contentSize.getHeight());<a name="line.494"></a>
<FONT color="green">495</FONT>                }<a name="line.495"></a>
<FONT color="green">496</FONT>                else {<a name="line.496"></a>
<FONT color="green">497</FONT>                    return contentSize;<a name="line.497"></a>
<FONT color="green">498</FONT>                }<a name="line.498"></a>
<FONT color="green">499</FONT>            }<a name="line.499"></a>
<FONT color="green">500</FONT>            else if (position == RectangleEdge.LEFT || position <a name="line.500"></a>
<FONT color="green">501</FONT>                    == RectangleEdge.RIGHT) {<a name="line.501"></a>
<FONT color="green">502</FONT>                float maxWidth = (float) heightRange.getUpperBound();<a name="line.502"></a>
<FONT color="green">503</FONT>                g2.setFont(this.font);<a name="line.503"></a>
<FONT color="green">504</FONT>                this.content = TextUtilities.createTextBlock(this.text, this.font, <a name="line.504"></a>
<FONT color="green">505</FONT>                        this.paint, maxWidth, new G2TextMeasurer(g2));<a name="line.505"></a>
<FONT color="green">506</FONT>                this.content.setLineAlignment(this.textAlignment);<a name="line.506"></a>
<FONT color="green">507</FONT>                Size2D contentSize = this.content.calculateDimensions(g2);<a name="line.507"></a>
<FONT color="green">508</FONT>                <a name="line.508"></a>
<FONT color="green">509</FONT>                // transpose the dimensions, because the title is rotated<a name="line.509"></a>
<FONT color="green">510</FONT>                if (this.expandToFitSpace) {<a name="line.510"></a>
<FONT color="green">511</FONT>                    return new Size2D(contentSize.getHeight(), maxWidth);<a name="line.511"></a>
<FONT color="green">512</FONT>                }<a name="line.512"></a>
<FONT color="green">513</FONT>                else {<a name="line.513"></a>
<FONT color="green">514</FONT>                    return new Size2D(contentSize.height, contentSize.width);<a name="line.514"></a>
<FONT color="green">515</FONT>                }<a name="line.515"></a>
<FONT color="green">516</FONT>            }<a name="line.516"></a>
<FONT color="green">517</FONT>            else {<a name="line.517"></a>
<FONT color="green">518</FONT>                throw new RuntimeException("Unrecognised exception.");<a name="line.518"></a>
<FONT color="green">519</FONT>            }<a name="line.519"></a>
<FONT color="green">520</FONT>        }<a name="line.520"></a>
<FONT color="green">521</FONT>        <a name="line.521"></a>
<FONT color="green">522</FONT>        /**<a name="line.522"></a>
<FONT color="green">523</FONT>         * Draws the title on a Java 2D graphics device (such as the screen or a <a name="line.523"></a>
<FONT color="green">524</FONT>         * printer).<a name="line.524"></a>
<FONT color="green">525</FONT>         *<a name="line.525"></a>
<FONT color="green">526</FONT>         * @param g2  the graphics device.<a name="line.526"></a>
<FONT color="green">527</FONT>         * @param area  the area allocated for the title.<a name="line.527"></a>
<FONT color="green">528</FONT>         */<a name="line.528"></a>
<FONT color="green">529</FONT>        public void draw(Graphics2D g2, Rectangle2D area) {<a name="line.529"></a>
<FONT color="green">530</FONT>            draw(g2, area, null);<a name="line.530"></a>
<FONT color="green">531</FONT>        }<a name="line.531"></a>
<FONT color="green">532</FONT>        <a name="line.532"></a>
<FONT color="green">533</FONT>        /**<a name="line.533"></a>
<FONT color="green">534</FONT>         * Draws the block within the specified area.<a name="line.534"></a>
<FONT color="green">535</FONT>         * <a name="line.535"></a>
<FONT color="green">536</FONT>         * @param g2  the graphics device.<a name="line.536"></a>
<FONT color="green">537</FONT>         * @param area  the area.<a name="line.537"></a>
<FONT color="green">538</FONT>         * @param params  if this is an instance of {@link EntityBlockParams} it<a name="line.538"></a>
<FONT color="green">539</FONT>         *                is used to determine whether or not an <a name="line.539"></a>
<FONT color="green">540</FONT>         *                {@link EntityCollection} is returned by this method.<a name="line.540"></a>
<FONT color="green">541</FONT>         * <a name="line.541"></a>
<FONT color="green">542</FONT>         * @return An {@link EntityCollection} containing a chart entity for the<a name="line.542"></a>
<FONT color="green">543</FONT>         *         title, or &lt;code&gt;null&lt;/code&gt;.<a name="line.543"></a>
<FONT color="green">544</FONT>         */<a name="line.544"></a>
<FONT color="green">545</FONT>        public Object draw(Graphics2D g2, Rectangle2D area, Object params) {<a name="line.545"></a>
<FONT color="green">546</FONT>            if (this.content == null) {<a name="line.546"></a>
<FONT color="green">547</FONT>                return null;   <a name="line.547"></a>
<FONT color="green">548</FONT>            }<a name="line.548"></a>
<FONT color="green">549</FONT>            area = trimMargin(area);<a name="line.549"></a>
<FONT color="green">550</FONT>            drawBorder(g2, area);<a name="line.550"></a>
<FONT color="green">551</FONT>            if (this.text.equals("")) {<a name="line.551"></a>
<FONT color="green">552</FONT>                return null;<a name="line.552"></a>
<FONT color="green">553</FONT>            }<a name="line.553"></a>
<FONT color="green">554</FONT>            ChartEntity entity = null;<a name="line.554"></a>
<FONT color="green">555</FONT>            if (params instanceof EntityBlockParams) {<a name="line.555"></a>
<FONT color="green">556</FONT>                EntityBlockParams p = (EntityBlockParams) params;<a name="line.556"></a>
<FONT color="green">557</FONT>                if (p.getGenerateEntities()) {<a name="line.557"></a>
<FONT color="green">558</FONT>                    entity = new ChartEntity(area, this.toolTipText, this.urlText);    <a name="line.558"></a>
<FONT color="green">559</FONT>                }<a name="line.559"></a>
<FONT color="green">560</FONT>            }<a name="line.560"></a>
<FONT color="green">561</FONT>            area = trimBorder(area);<a name="line.561"></a>