moduloaxis.html

jfreechart1。0。2的api。

<FONT color="green">316</FONT>         * Returns the display length for the axis.<a name="line.316"></a>
<FONT color="green">317</FONT>         * <a name="line.317"></a>
<FONT color="green">318</FONT>         * @return The display length.<a name="line.318"></a>
<FONT color="green">319</FONT>         */<a name="line.319"></a>
<FONT color="green">320</FONT>        private double getDisplayLength() {<a name="line.320"></a>
<FONT color="green">321</FONT>            if (this.displayStart &lt; this.displayEnd) {<a name="line.321"></a>
<FONT color="green">322</FONT>                return (this.displayEnd - this.displayStart);<a name="line.322"></a>
<FONT color="green">323</FONT>            }<a name="line.323"></a>
<FONT color="green">324</FONT>            else {<a name="line.324"></a>
<FONT color="green">325</FONT>                return (this.fixedRange.getUpperBound() - this.displayStart)<a name="line.325"></a>
<FONT color="green">326</FONT>                    + (this.displayEnd - this.fixedRange.getLowerBound());<a name="line.326"></a>
<FONT color="green">327</FONT>            }<a name="line.327"></a>
<FONT color="green">328</FONT>        }<a name="line.328"></a>
<FONT color="green">329</FONT>        <a name="line.329"></a>
<FONT color="green">330</FONT>        /**<a name="line.330"></a>
<FONT color="green">331</FONT>         * Returns the central value of the current display range.<a name="line.331"></a>
<FONT color="green">332</FONT>         * <a name="line.332"></a>
<FONT color="green">333</FONT>         * @return The central value.<a name="line.333"></a>
<FONT color="green">334</FONT>         */<a name="line.334"></a>
<FONT color="green">335</FONT>        private double getDisplayCentralValue() {<a name="line.335"></a>
<FONT color="green">336</FONT>            return mapValueToFixedRange(<a name="line.336"></a>
<FONT color="green">337</FONT>                this.displayStart + (getDisplayLength() / 2)<a name="line.337"></a>
<FONT color="green">338</FONT>            );    <a name="line.338"></a>
<FONT color="green">339</FONT>        }<a name="line.339"></a>
<FONT color="green">340</FONT>        <a name="line.340"></a>
<FONT color="green">341</FONT>        /**<a name="line.341"></a>
<FONT color="green">342</FONT>         * Increases or decreases the axis range by the specified percentage about <a name="line.342"></a>
<FONT color="green">343</FONT>         * the central value and sends an {@link AxisChangeEvent} to all registered<a name="line.343"></a>
<FONT color="green">344</FONT>         * listeners.<a name="line.344"></a>
<FONT color="green">345</FONT>         * &lt;P&gt;<a name="line.345"></a>
<FONT color="green">346</FONT>         * To double the length of the axis range, use 200% (2.0).<a name="line.346"></a>
<FONT color="green">347</FONT>         * To halve the length of the axis range, use 50% (0.5).<a name="line.347"></a>
<FONT color="green">348</FONT>         *<a name="line.348"></a>
<FONT color="green">349</FONT>         * @param percent  the resize factor.<a name="line.349"></a>
<FONT color="green">350</FONT>         */<a name="line.350"></a>
<FONT color="green">351</FONT>        public void resizeRange(double percent) {<a name="line.351"></a>
<FONT color="green">352</FONT>            resizeRange(percent, getDisplayCentralValue());<a name="line.352"></a>
<FONT color="green">353</FONT>        }<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>         * Increases or decreases the axis range by the specified percentage about <a name="line.356"></a>
<FONT color="green">357</FONT>         * the specified anchor value and sends an {@link AxisChangeEvent} to all <a name="line.357"></a>
<FONT color="green">358</FONT>         * registered listeners.<a name="line.358"></a>
<FONT color="green">359</FONT>         * &lt;P&gt;<a name="line.359"></a>
<FONT color="green">360</FONT>         * To double the length of the axis range, use 200% (2.0).<a name="line.360"></a>
<FONT color="green">361</FONT>         * To halve the length of the axis range, use 50% (0.5).<a name="line.361"></a>
<FONT color="green">362</FONT>         *<a name="line.362"></a>
<FONT color="green">363</FONT>         * @param percent  the resize factor.<a name="line.363"></a>
<FONT color="green">364</FONT>         * @param anchorValue  the new central value after the resize.<a name="line.364"></a>
<FONT color="green">365</FONT>         */<a name="line.365"></a>
<FONT color="green">366</FONT>        public void resizeRange(double percent, double anchorValue) {<a name="line.366"></a>
<FONT color="green">367</FONT>    <a name="line.367"></a>
<FONT color="green">368</FONT>            if (percent &gt; 0.0) {<a name="line.368"></a>
<FONT color="green">369</FONT>                double halfLength = getDisplayLength() * percent / 2;<a name="line.369"></a>
<FONT color="green">370</FONT>                setDisplayRange(anchorValue - halfLength, anchorValue + halfLength);<a name="line.370"></a>
<FONT color="green">371</FONT>            }<a name="line.371"></a>
<FONT color="green">372</FONT>            else {<a name="line.372"></a>
<FONT color="green">373</FONT>                setAutoRange(true);<a name="line.373"></a>
<FONT color="green">374</FONT>            }<a name="line.374"></a>
<FONT color="green">375</FONT>    <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>         * Converts a length in data coordinates into the corresponding length in <a name="line.379"></a>
<FONT color="green">380</FONT>         * Java2D coordinates.<a name="line.380"></a>
<FONT color="green">381</FONT>         * <a name="line.381"></a>
<FONT color="green">382</FONT>         * @param length  the length.<a name="line.382"></a>
<FONT color="green">383</FONT>         * @param area  the plot area.<a name="line.383"></a>
<FONT color="green">384</FONT>         * @param edge  the edge along which the axis lies.<a name="line.384"></a>
<FONT color="green">385</FONT>         * <a name="line.385"></a>
<FONT color="green">386</FONT>         * @return The length in Java2D coordinates.<a name="line.386"></a>
<FONT color="green">387</FONT>         */<a name="line.387"></a>
<FONT color="green">388</FONT>        public double lengthToJava2D(double length, Rectangle2D area, <a name="line.388"></a>
<FONT color="green">389</FONT>                                     RectangleEdge edge) {<a name="line.389"></a>
<FONT color="green">390</FONT>            double axisLength = 0.0;<a name="line.390"></a>
<FONT color="green">391</FONT>            if (this.displayEnd &gt; this.displayStart) {<a name="line.391"></a>
<FONT color="green">392</FONT>                axisLength = this.displayEnd - this.displayStart;<a name="line.392"></a>
<FONT color="green">393</FONT>            }<a name="line.393"></a>
<FONT color="green">394</FONT>            else {<a name="line.394"></a>
<FONT color="green">395</FONT>                axisLength = (this.fixedRange.getUpperBound() - this.displayStart) <a name="line.395"></a>
<FONT color="green">396</FONT>                    + (this.displayEnd - this.fixedRange.getLowerBound());<a name="line.396"></a>
<FONT color="green">397</FONT>            }<a name="line.397"></a>
<FONT color="green">398</FONT>            double areaLength = 0.0;<a name="line.398"></a>
<FONT color="green">399</FONT>            if (RectangleEdge.isLeftOrRight(edge)) {<a name="line.399"></a>
<FONT color="green">400</FONT>                areaLength = area.getHeight();<a name="line.400"></a>
<FONT color="green">401</FONT>            }<a name="line.401"></a>
<FONT color="green">402</FONT>            else {<a name="line.402"></a>
<FONT color="green">403</FONT>                areaLength = area.getWidth();<a name="line.403"></a>
<FONT color="green">404</FONT>            }<a name="line.404"></a>
<FONT color="green">405</FONT>            return (length / axisLength) * areaLength;<a name="line.405"></a>
<FONT color="green">406</FONT>        }<a name="line.406"></a>
<FONT color="green">407</FONT>        <a name="line.407"></a>
<FONT color="green">408</FONT>    }<a name="line.408"></a>




























































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