numberaxis.html

jfreechart1。0。2的api。

<FONT color="green">418</FONT>                    upper = Math.min(0.0, upper);                   <a name="line.418"></a>
<FONT color="green">419</FONT>                }<a name="line.419"></a>
<FONT color="green">420</FONT>                <a name="line.420"></a>
<FONT color="green">421</FONT>                if (getAutoRangeIncludesZero()) {<a name="line.421"></a>
<FONT color="green">422</FONT>                    lower = Math.min(lower, 0.0);<a name="line.422"></a>
<FONT color="green">423</FONT>                    upper = Math.max(upper, 0.0);<a name="line.423"></a>
<FONT color="green">424</FONT>                }<a name="line.424"></a>
<FONT color="green">425</FONT>                double range = upper - lower;<a name="line.425"></a>
<FONT color="green">426</FONT>    <a name="line.426"></a>
<FONT color="green">427</FONT>                // if fixed auto range, then derive lower bound...<a name="line.427"></a>
<FONT color="green">428</FONT>                double fixedAutoRange = getFixedAutoRange();<a name="line.428"></a>
<FONT color="green">429</FONT>                if (fixedAutoRange &gt; 0.0) {<a name="line.429"></a>
<FONT color="green">430</FONT>                    lower = upper - fixedAutoRange;<a name="line.430"></a>
<FONT color="green">431</FONT>                }<a name="line.431"></a>
<FONT color="green">432</FONT>                else {<a name="line.432"></a>
<FONT color="green">433</FONT>                    // ensure the autorange is at least &lt;minRange&gt; in size...<a name="line.433"></a>
<FONT color="green">434</FONT>                    double minRange = getAutoRangeMinimumSize();<a name="line.434"></a>
<FONT color="green">435</FONT>                    if (range &lt; minRange) {<a name="line.435"></a>
<FONT color="green">436</FONT>                        double expand = (minRange - range) / 2;<a name="line.436"></a>
<FONT color="green">437</FONT>                        upper = upper + expand;<a name="line.437"></a>
<FONT color="green">438</FONT>                        lower = lower - expand;<a name="line.438"></a>
<FONT color="green">439</FONT>                        if (this.rangeType == RangeType.POSITIVE) {<a name="line.439"></a>
<FONT color="green">440</FONT>                            if (lower &lt; 0.0) {<a name="line.440"></a>
<FONT color="green">441</FONT>                                upper = upper - lower;<a name="line.441"></a>
<FONT color="green">442</FONT>                                lower = 0.0;<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 (this.rangeType == RangeType.NEGATIVE) {<a name="line.445"></a>
<FONT color="green">446</FONT>                            if (upper &gt; 0.0) {<a name="line.446"></a>
<FONT color="green">447</FONT>                                lower = lower - upper;<a name="line.447"></a>
<FONT color="green">448</FONT>                                upper = 0.0;<a name="line.448"></a>
<FONT color="green">449</FONT>                            }<a name="line.449"></a>
<FONT color="green">450</FONT>                        }<a name="line.450"></a>
<FONT color="green">451</FONT>                    }<a name="line.451"></a>
<FONT color="green">452</FONT>    <a name="line.452"></a>
<FONT color="green">453</FONT>                    if (getAutoRangeStickyZero()) {<a name="line.453"></a>
<FONT color="green">454</FONT>                        if (upper &lt;= 0.0) {<a name="line.454"></a>
<FONT color="green">455</FONT>                            upper = Math.min(0.0, upper + getUpperMargin() * range);<a name="line.455"></a>
<FONT color="green">456</FONT>                        }<a name="line.456"></a>
<FONT color="green">457</FONT>                        else {<a name="line.457"></a>
<FONT color="green">458</FONT>                            upper = upper + getUpperMargin() * range;<a name="line.458"></a>
<FONT color="green">459</FONT>                        }<a name="line.459"></a>
<FONT color="green">460</FONT>                        if (lower &gt;= 0.0) {<a name="line.460"></a>
<FONT color="green">461</FONT>                            lower = Math.max(0.0, lower - getLowerMargin() * range);<a name="line.461"></a>
<FONT color="green">462</FONT>                        }<a name="line.462"></a>
<FONT color="green">463</FONT>                        else {<a name="line.463"></a>
<FONT color="green">464</FONT>                            lower = lower - getLowerMargin() * range;<a name="line.464"></a>
<FONT color="green">465</FONT>                        }<a name="line.465"></a>
<FONT color="green">466</FONT>                    }<a name="line.466"></a>
<FONT color="green">467</FONT>                    else {<a name="line.467"></a>
<FONT color="green">468</FONT>                        upper = upper + getUpperMargin() * range;<a name="line.468"></a>
<FONT color="green">469</FONT>                        lower = lower - getLowerMargin() * range;<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>                setRange(new Range(lower, upper), false, false);<a name="line.473"></a>
<FONT color="green">474</FONT>            }<a name="line.474"></a>
<FONT color="green">475</FONT>    <a name="line.475"></a>
<FONT color="green">476</FONT>        }<a name="line.476"></a>
<FONT color="green">477</FONT>    <a name="line.477"></a>
<FONT color="green">478</FONT>        /**<a name="line.478"></a>
<FONT color="green">479</FONT>         * Converts a data value to a coordinate in Java2D space, assuming that the<a name="line.479"></a>
<FONT color="green">480</FONT>         * axis runs along one edge of the specified dataArea.<a name="line.480"></a>
<FONT color="green">481</FONT>         * &lt;p&gt;<a name="line.481"></a>
<FONT color="green">482</FONT>         * Note that it is possible for the coordinate to fall outside the plotArea.<a name="line.482"></a>
<FONT color="green">483</FONT>         *<a name="line.483"></a>
<FONT color="green">484</FONT>         * @param value  the data value.<a name="line.484"></a>
<FONT color="green">485</FONT>         * @param area  the area for plotting the data.<a name="line.485"></a>
<FONT color="green">486</FONT>         * @param edge  the axis location.<a name="line.486"></a>
<FONT color="green">487</FONT>         *<a name="line.487"></a>
<FONT color="green">488</FONT>         * @return The Java2D coordinate.<a name="line.488"></a>
<FONT color="green">489</FONT>         */<a name="line.489"></a>
<FONT color="green">490</FONT>        public double valueToJava2D(double value, Rectangle2D area, <a name="line.490"></a>
<FONT color="green">491</FONT>                                    RectangleEdge edge) {<a name="line.491"></a>
<FONT color="green">492</FONT>            <a name="line.492"></a>
<FONT color="green">493</FONT>            Range range = getRange();<a name="line.493"></a>
<FONT color="green">494</FONT>            double axisMin = range.getLowerBound();<a name="line.494"></a>
<FONT color="green">495</FONT>            double axisMax = range.getUpperBound();<a name="line.495"></a>
<FONT color="green">496</FONT>    <a name="line.496"></a>
<FONT color="green">497</FONT>            double min = 0.0;<a name="line.497"></a>
<FONT color="green">498</FONT>            double max = 0.0;<a name="line.498"></a>
<FONT color="green">499</FONT>            if (RectangleEdge.isTopOrBottom(edge)) {<a name="line.499"></a>
<FONT color="green">500</FONT>                min = area.getX();<a name="line.500"></a>
<FONT color="green">501</FONT>                max = area.getMaxX();<a name="line.501"></a>
<FONT color="green">502</FONT>            }<a name="line.502"></a>
<FONT color="green">503</FONT>            else if (RectangleEdge.isLeftOrRight(edge)) {<a name="line.503"></a>
<FONT color="green">504</FONT>                max = area.getMinY();<a name="line.504"></a>
<FONT color="green">505</FONT>                min = area.getMaxY();<a name="line.505"></a>
<FONT color="green">506</FONT>            }<a name="line.506"></a>
<FONT color="green">507</FONT>            if (isInverted()) {<a name="line.507"></a>
<FONT color="green">508</FONT>                return max <a name="line.508"></a>
<FONT color="green">509</FONT>                       - ((value - axisMin) / (axisMax - axisMin)) * (max - min);<a name="line.509"></a>
<FONT color="green">510</FONT>            }<a name="line.510"></a>
<FONT color="green">511</FONT>            else {<a name="line.511"></a>
<FONT color="green">512</FONT>                return min <a name="line.512"></a>
<FONT color="green">513</FONT>                       + ((value - axisMin) / (axisMax - axisMin)) * (max - min);<a name="line.513"></a>
<FONT color="green">514</FONT>            }<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>    <a name="line.517"></a>
<FONT color="green">518</FONT>        /**<a name="line.518"></a>
<FONT color="green">519</FONT>         * Converts a coordinate in Java2D space to the corresponding data value,<a name="line.519"></a>
<FONT color="green">520</FONT>         * assuming that the axis runs along one edge of the specified dataArea.<a name="line.520"></a>
<FONT color="green">521</FONT>         *<a name="line.521"></a>
<FONT color="green">522</FONT>         * @param java2DValue  the coordinate in Java2D space.<a name="line.522"></a>
<FONT color="green">523</FONT>         * @param area  the area in which the data is plotted.<a name="line.523"></a>
<FONT color="green">524</FONT>         * @param edge  the location.<a name="line.524"></a>
<FONT color="green">525</FONT>         *<a name="line.525"></a>
<FONT color="green">526</FONT>         * @return The data value.<a name="line.526"></a>
<FONT color="green">527</FONT>         */<a name="line.527"></a>
<FONT color="green">528</FONT>        public double java2DToValue(double java2DValue, Rectangle2D area, <a name="line.528"></a>
<FONT color="green">529</FONT>                                    RectangleEdge edge) {<a name="line.529"></a>
<FONT color="green">530</FONT>            <a name="line.530"></a>
<FONT color="green">531</FONT>            Range range = getRange();<a name="line.531"></a>
<FONT color="green">532</FONT>            double axisMin = range.getLowerBound();<a name="line.532"></a>
<FONT color="green">533</FONT>            double axisMax = range.getUpperBound();<a name="line.533"></a>
<FONT color="green">534</FONT>    <a name="line.534"></a>
<FONT color="green">535</FONT>            double min = 0.0;<a name="line.535"></a>
<FONT color="green">536</FONT>            double max = 0.0;<a name="line.536"></a>
<FONT color="green">537</FONT>            if (RectangleEdge.isTopOrBottom(edge)) {<a name="line.537"></a>
<FONT color="green">538</FONT>                min = area.getX();<a name="line.538"></a>
<FONT color="green">539</FONT>                max = area.getMaxX();<a name="line.539"></a>
<FONT color="green">540</FONT>            }<a name="line.540"></a>
<FONT color="green">541</FONT>            else if (RectangleEdge.isLeftOrRight(edge)) {<a name="line.541"></a>
<FONT color="green">542</FONT>                min = area.getMaxY();<a name="line.542"></a>
<FONT color="green">543</FONT>                max = area.getY();<a name="line.543"></a>
<FONT color="green">544</FONT>            }<a name="line.544"></a>
<FONT color="green">545</FONT>            if (isInverted()) {<a name="line.545"></a>
<FONT color="green">546</FONT>                return axisMax <a name="line.546"></a>
<FONT color="green">547</FONT>                       - (java2DValue - min) / (max - min) * (axisMax - axisMin);<a name="line.547"></a>
<FONT color="green">548</FONT>            }<a name="line.548"></a>
<FONT color="green">549</FONT>            else {<a name="line.549"></a>
<FONT color="green">550</FONT>                return axisMin <a name="line.550"></a>
<FONT color="green">551</FONT>                       + (java2DValue - min) / (max - min) * (axisMax - axisMin);<a name="line.551"></a>
<FONT color="green">552</FONT>            }<a name="line.552"></a>
<FONT color="green">553</FONT>    <a name="line.553"></a>
<FONT color="green">554</FONT>        }<a name="line.554"></a>
<FONT color="green">555</FONT>    <a name="line.555"></a>
<FONT color="green">556</FONT>        /**<a name="line.556"></a>
<FONT color="green">557</FONT>         * Calculates the value of the lowest visible tick on the axis.<a name="line.557"></a>