intervalxydelegate.html

jfreechart1。0。2的api。

<FONT color="green">350</FONT>            if (r != null) {<a name="line.350"></a>
<FONT color="green">351</FONT>                result = r.getUpperBound();<a name="line.351"></a>
<FONT color="green">352</FONT>            }<a name="line.352"></a>
<FONT color="green">353</FONT>            return result;<a name="line.353"></a>
<FONT color="green">354</FONT>        }<a name="line.354"></a>
<FONT color="green">355</FONT>    <a name="line.355"></a>
<FONT color="green">356</FONT>        /**<a name="line.356"></a>
<FONT color="green">357</FONT>         * Returns the range of the values in the dataset's domain, including<a name="line.357"></a>
<FONT color="green">358</FONT>         * or excluding the interval around each x-value as specified.<a name="line.358"></a>
<FONT color="green">359</FONT>         *<a name="line.359"></a>
<FONT color="green">360</FONT>         * @param includeInterval  a flag that determines whether or not the <a name="line.360"></a>
<FONT color="green">361</FONT>         *                         x-interval should be taken into account.<a name="line.361"></a>
<FONT color="green">362</FONT>         * <a name="line.362"></a>
<FONT color="green">363</FONT>         * @return The range.<a name="line.363"></a>
<FONT color="green">364</FONT>         */<a name="line.364"></a>
<FONT color="green">365</FONT>        public Range getDomainBounds(boolean includeInterval) {<a name="line.365"></a>
<FONT color="green">366</FONT>            // first get the range without the interval, then expand it for the<a name="line.366"></a>
<FONT color="green">367</FONT>            // interval width<a name="line.367"></a>
<FONT color="green">368</FONT>            Range range = DatasetUtilities.findDomainBounds(this.dataset, false);<a name="line.368"></a>
<FONT color="green">369</FONT>            if (includeInterval &amp;&amp; range != null) {<a name="line.369"></a>
<FONT color="green">370</FONT>                double lowerAdj = getIntervalWidth() * getIntervalPositionFactor();<a name="line.370"></a>
<FONT color="green">371</FONT>                double upperAdj = getIntervalWidth() - lowerAdj;<a name="line.371"></a>
<FONT color="green">372</FONT>                range = new Range(range.getLowerBound() - lowerAdj, <a name="line.372"></a>
<FONT color="green">373</FONT>                    range.getUpperBound() + upperAdj);<a name="line.373"></a>
<FONT color="green">374</FONT>            }<a name="line.374"></a>
<FONT color="green">375</FONT>            return range;<a name="line.375"></a>
<FONT color="green">376</FONT>        }<a name="line.376"></a>
<FONT color="green">377</FONT>        <a name="line.377"></a>
<FONT color="green">378</FONT>        /**<a name="line.378"></a>
<FONT color="green">379</FONT>         * Handles events from the dataset by recalculating the interval if <a name="line.379"></a>
<FONT color="green">380</FONT>         * necessary.<a name="line.380"></a>
<FONT color="green">381</FONT>         * <a name="line.381"></a>
<FONT color="green">382</FONT>         * @param e  the event.<a name="line.382"></a>
<FONT color="green">383</FONT>         */    <a name="line.383"></a>
<FONT color="green">384</FONT>        public void datasetChanged(DatasetChangeEvent e) {<a name="line.384"></a>
<FONT color="green">385</FONT>            // TODO: by coding the event with some information about what changed<a name="line.385"></a>
<FONT color="green">386</FONT>            // in the dataset, we could make the recalculation of the interval<a name="line.386"></a>
<FONT color="green">387</FONT>            // more efficient in some cases...<a name="line.387"></a>
<FONT color="green">388</FONT>            if (this.autoWidth) {<a name="line.388"></a>
<FONT color="green">389</FONT>                this.autoIntervalWidth = recalculateInterval();<a name="line.389"></a>
<FONT color="green">390</FONT>            }<a name="line.390"></a>
<FONT color="green">391</FONT>        }<a name="line.391"></a>
<FONT color="green">392</FONT>        <a name="line.392"></a>
<FONT color="green">393</FONT>        /**<a name="line.393"></a>
<FONT color="green">394</FONT>         * Recalculate the minimum width "from scratch".<a name="line.394"></a>
<FONT color="green">395</FONT>         */<a name="line.395"></a>
<FONT color="green">396</FONT>        private double recalculateInterval() {<a name="line.396"></a>
<FONT color="green">397</FONT>            double result = Double.POSITIVE_INFINITY;<a name="line.397"></a>
<FONT color="green">398</FONT>            int seriesCount = this.dataset.getSeriesCount();<a name="line.398"></a>
<FONT color="green">399</FONT>            for (int series = 0; series &lt; seriesCount; series++) {<a name="line.399"></a>
<FONT color="green">400</FONT>                result = Math.min(result, calculateIntervalForSeries(series));<a name="line.400"></a>
<FONT color="green">401</FONT>            }<a name="line.401"></a>
<FONT color="green">402</FONT>            return result;<a name="line.402"></a>
<FONT color="green">403</FONT>        }<a name="line.403"></a>
<FONT color="green">404</FONT>        <a name="line.404"></a>
<FONT color="green">405</FONT>        /**<a name="line.405"></a>
<FONT color="green">406</FONT>         * Calculates the interval width for a given series.<a name="line.406"></a>
<FONT color="green">407</FONT>         *  <a name="line.407"></a>
<FONT color="green">408</FONT>         * @param series  the series index.<a name="line.408"></a>
<FONT color="green">409</FONT>         */<a name="line.409"></a>
<FONT color="green">410</FONT>        private double calculateIntervalForSeries(int series) {<a name="line.410"></a>
<FONT color="green">411</FONT>            double result = Double.POSITIVE_INFINITY;<a name="line.411"></a>
<FONT color="green">412</FONT>            int itemCount = this.dataset.getItemCount(series);<a name="line.412"></a>
<FONT color="green">413</FONT>            if (itemCount &gt; 1) {<a name="line.413"></a>
<FONT color="green">414</FONT>                double prev = this.dataset.getXValue(series, 0);<a name="line.414"></a>
<FONT color="green">415</FONT>                for (int item = 1; item &lt; itemCount; item++) {<a name="line.415"></a>
<FONT color="green">416</FONT>                    double x = this.dataset.getXValue(series, item);<a name="line.416"></a>
<FONT color="green">417</FONT>                    result = Math.min(result, x - prev);<a name="line.417"></a>
<FONT color="green">418</FONT>                    prev = x;<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>            return result;<a name="line.421"></a>
<FONT color="green">422</FONT>        }<a name="line.422"></a>
<FONT color="green">423</FONT>        <a name="line.423"></a>
<FONT color="green">424</FONT>        /**<a name="line.424"></a>
<FONT color="green">425</FONT>         * Tests the delegate for equality with an arbitrary object.<a name="line.425"></a>
<FONT color="green">426</FONT>         * <a name="line.426"></a>
<FONT color="green">427</FONT>         * @param obj  the object (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.427"></a>
<FONT color="green">428</FONT>         * <a name="line.428"></a>
<FONT color="green">429</FONT>         * @return A boolean.<a name="line.429"></a>
<FONT color="green">430</FONT>         */<a name="line.430"></a>
<FONT color="green">431</FONT>        public boolean equals(Object obj) {<a name="line.431"></a>
<FONT color="green">432</FONT>            if (obj == this) {<a name="line.432"></a>
<FONT color="green">433</FONT>                return true;   <a name="line.433"></a>
<FONT color="green">434</FONT>            }<a name="line.434"></a>
<FONT color="green">435</FONT>            if (!(obj instanceof IntervalXYDelegate)) {<a name="line.435"></a>
<FONT color="green">436</FONT>                return false;   <a name="line.436"></a>
<FONT color="green">437</FONT>            }<a name="line.437"></a>
<FONT color="green">438</FONT>            IntervalXYDelegate that = (IntervalXYDelegate) obj;<a name="line.438"></a>
<FONT color="green">439</FONT>            if (this.autoWidth != that.autoWidth) {<a name="line.439"></a>
<FONT color="green">440</FONT>                return false;   <a name="line.440"></a>
<FONT color="green">441</FONT>            }<a name="line.441"></a>
<FONT color="green">442</FONT>            if (this.intervalPositionFactor != that.intervalPositionFactor) {<a name="line.442"></a>
<FONT color="green">443</FONT>                return false;   <a name="line.443"></a>
<FONT color="green">444</FONT>            }<a name="line.444"></a>
<FONT color="green">445</FONT>            if (this.fixedIntervalWidth != that.fixedIntervalWidth) {<a name="line.445"></a>
<FONT color="green">446</FONT>                return false;   <a name="line.446"></a>
<FONT color="green">447</FONT>            }<a name="line.447"></a>
<FONT color="green">448</FONT>            return true;<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>         * @return A clone of this delegate.<a name="line.452"></a>
<FONT color="green">453</FONT>         * <a name="line.453"></a>
<FONT color="green">454</FONT>         * @throws CloneNotSupportedException if the object cannot be cloned.<a name="line.454"></a>
<FONT color="green">455</FONT>         */<a name="line.455"></a>
<FONT color="green">456</FONT>        public Object clone() throws CloneNotSupportedException {<a name="line.456"></a>
<FONT color="green">457</FONT>            return super.clone();<a name="line.457"></a>
<FONT color="green">458</FONT>        }<a name="line.458"></a>
<FONT color="green">459</FONT>        <a name="line.459"></a>
<FONT color="green">460</FONT>    }<a name="line.460"></a>




























































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