numberaxis.html

jfreechart1。0。2的api。

<FONT color="green">278</FONT>        /**<a name="line.278"></a>
<FONT color="green">279</FONT>         * Returns the tick unit for the axis.  <a name="line.279"></a>
<FONT color="green">280</FONT>         * &lt;p&gt;<a name="line.280"></a>
<FONT color="green">281</FONT>         * Note: if the &lt;code&gt;autoTickUnitSelection&lt;/code&gt; flag is <a name="line.281"></a>
<FONT color="green">282</FONT>         * &lt;code&gt;true&lt;/code&gt; the tick unit may be changed while the axis is being <a name="line.282"></a>
<FONT color="green">283</FONT>         * drawn, so in that case the return value from this method may be<a name="line.283"></a>
<FONT color="green">284</FONT>         * irrelevant if the method is called before the axis has been drawn.<a name="line.284"></a>
<FONT color="green">285</FONT>         *<a name="line.285"></a>
<FONT color="green">286</FONT>         * @return The tick unit for the axis.<a name="line.286"></a>
<FONT color="green">287</FONT>         * <a name="line.287"></a>
<FONT color="green">288</FONT>         * @see #setTickUnit(NumberTickUnit)<a name="line.288"></a>
<FONT color="green">289</FONT>         * @see ValueAxis#isAutoTickUnitSelection()<a name="line.289"></a>
<FONT color="green">290</FONT>         */<a name="line.290"></a>
<FONT color="green">291</FONT>        public NumberTickUnit getTickUnit() {<a name="line.291"></a>
<FONT color="green">292</FONT>            return this.tickUnit;<a name="line.292"></a>
<FONT color="green">293</FONT>        }<a name="line.293"></a>
<FONT color="green">294</FONT>    <a name="line.294"></a>
<FONT color="green">295</FONT>        /**<a name="line.295"></a>
<FONT color="green">296</FONT>         * Sets the tick unit for the axis and sends an {@link AxisChangeEvent} to <a name="line.296"></a>
<FONT color="green">297</FONT>         * all registered listeners.  A side effect of calling this method is that<a name="line.297"></a>
<FONT color="green">298</FONT>         * the "auto-select" feature for tick units is switched off (you can <a name="line.298"></a>
<FONT color="green">299</FONT>         * restore it using the {@link ValueAxis#setAutoTickUnitSelection(boolean)}<a name="line.299"></a>
<FONT color="green">300</FONT>         * method).<a name="line.300"></a>
<FONT color="green">301</FONT>         *<a name="line.301"></a>
<FONT color="green">302</FONT>         * @param unit  the new tick unit (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.302"></a>
<FONT color="green">303</FONT>         * <a name="line.303"></a>
<FONT color="green">304</FONT>         * @see #getTickUnit()<a name="line.304"></a>
<FONT color="green">305</FONT>         * @see #setTickUnit(NumberTickUnit, boolean, boolean)<a name="line.305"></a>
<FONT color="green">306</FONT>         */<a name="line.306"></a>
<FONT color="green">307</FONT>        public void setTickUnit(NumberTickUnit unit) {<a name="line.307"></a>
<FONT color="green">308</FONT>            // defer argument checking...<a name="line.308"></a>
<FONT color="green">309</FONT>            setTickUnit(unit, true, true);<a name="line.309"></a>
<FONT color="green">310</FONT>        }<a name="line.310"></a>
<FONT color="green">311</FONT>    <a name="line.311"></a>
<FONT color="green">312</FONT>        /**<a name="line.312"></a>
<FONT color="green">313</FONT>         * Sets the tick unit for the axis and, if requested, sends an <a name="line.313"></a>
<FONT color="green">314</FONT>         * {@link AxisChangeEvent} to all registered listeners.  In addition, an <a name="line.314"></a>
<FONT color="green">315</FONT>         * option is provided to turn off the "auto-select" feature for tick units <a name="line.315"></a>
<FONT color="green">316</FONT>         * (you can restore it using the <a name="line.316"></a>
<FONT color="green">317</FONT>         * {@link ValueAxis#setAutoTickUnitSelection(boolean)} method).<a name="line.317"></a>
<FONT color="green">318</FONT>         *<a name="line.318"></a>
<FONT color="green">319</FONT>         * @param unit  the new tick unit (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.319"></a>
<FONT color="green">320</FONT>         * @param notify  notify listeners?<a name="line.320"></a>
<FONT color="green">321</FONT>         * @param turnOffAutoSelect  turn off the auto-tick selection?<a name="line.321"></a>
<FONT color="green">322</FONT>         */<a name="line.322"></a>
<FONT color="green">323</FONT>        public void setTickUnit(NumberTickUnit unit, boolean notify, <a name="line.323"></a>
<FONT color="green">324</FONT>                                boolean turnOffAutoSelect) {<a name="line.324"></a>
<FONT color="green">325</FONT>    <a name="line.325"></a>
<FONT color="green">326</FONT>            if (unit == null) {<a name="line.326"></a>
<FONT color="green">327</FONT>                throw new IllegalArgumentException("Null 'unit' argument.");   <a name="line.327"></a>
<FONT color="green">328</FONT>            }<a name="line.328"></a>
<FONT color="green">329</FONT>            this.tickUnit = unit;<a name="line.329"></a>
<FONT color="green">330</FONT>            if (turnOffAutoSelect) {<a name="line.330"></a>
<FONT color="green">331</FONT>                setAutoTickUnitSelection(false, false);<a name="line.331"></a>
<FONT color="green">332</FONT>            }<a name="line.332"></a>
<FONT color="green">333</FONT>            if (notify) {<a name="line.333"></a>
<FONT color="green">334</FONT>                notifyListeners(new AxisChangeEvent(this));<a name="line.334"></a>
<FONT color="green">335</FONT>            }<a name="line.335"></a>
<FONT color="green">336</FONT>    <a name="line.336"></a>
<FONT color="green">337</FONT>        }<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>         * Returns the number format override.  If this is non-null, then it will <a name="line.340"></a>
<FONT color="green">341</FONT>         * be used to format the numbers on the axis.<a name="line.341"></a>
<FONT color="green">342</FONT>         *<a name="line.342"></a>
<FONT color="green">343</FONT>         * @return The number formatter (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.343"></a>
<FONT color="green">344</FONT>         */<a name="line.344"></a>
<FONT color="green">345</FONT>        public NumberFormat getNumberFormatOverride() {<a name="line.345"></a>
<FONT color="green">346</FONT>            return this.numberFormatOverride;<a name="line.346"></a>
<FONT color="green">347</FONT>        }<a name="line.347"></a>
<FONT color="green">348</FONT>    <a name="line.348"></a>
<FONT color="green">349</FONT>        /**<a name="line.349"></a>
<FONT color="green">350</FONT>         * Sets the number format override.  If this is non-null, then it will be <a name="line.350"></a>
<FONT color="green">351</FONT>         * used to format the numbers on the axis.<a name="line.351"></a>
<FONT color="green">352</FONT>         *<a name="line.352"></a>
<FONT color="green">353</FONT>         * @param formatter  the number formatter (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.353"></a>
<FONT color="green">354</FONT>         */<a name="line.354"></a>
<FONT color="green">355</FONT>        public void setNumberFormatOverride(NumberFormat formatter) {<a name="line.355"></a>
<FONT color="green">356</FONT>            this.numberFormatOverride = formatter;<a name="line.356"></a>
<FONT color="green">357</FONT>            notifyListeners(new AxisChangeEvent(this));<a name="line.357"></a>
<FONT color="green">358</FONT>        }<a name="line.358"></a>
<FONT color="green">359</FONT>    <a name="line.359"></a>
<FONT color="green">360</FONT>        /**<a name="line.360"></a>
<FONT color="green">361</FONT>         * Returns the (optional) marker band for the axis.<a name="line.361"></a>
<FONT color="green">362</FONT>         *<a name="line.362"></a>
<FONT color="green">363</FONT>         * @return The marker band (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.363"></a>
<FONT color="green">364</FONT>         */<a name="line.364"></a>
<FONT color="green">365</FONT>        public MarkerAxisBand getMarkerBand() {<a name="line.365"></a>
<FONT color="green">366</FONT>            return this.markerBand;<a name="line.366"></a>
<FONT color="green">367</FONT>        }<a name="line.367"></a>
<FONT color="green">368</FONT>    <a name="line.368"></a>
<FONT color="green">369</FONT>        /**<a name="line.369"></a>
<FONT color="green">370</FONT>         * Sets the marker band for the axis.<a name="line.370"></a>
<FONT color="green">371</FONT>         * &lt;P&gt;<a name="line.371"></a>
<FONT color="green">372</FONT>         * The marker band is optional, leave it set to &lt;code&gt;null&lt;/code&gt; if you <a name="line.372"></a>
<FONT color="green">373</FONT>         * don't require it.<a name="line.373"></a>
<FONT color="green">374</FONT>         *<a name="line.374"></a>
<FONT color="green">375</FONT>         * @param band the new band (&lt;code&gt;null&lt;code&gt; permitted).<a name="line.375"></a>
<FONT color="green">376</FONT>         */<a name="line.376"></a>
<FONT color="green">377</FONT>        public void setMarkerBand(MarkerAxisBand band) {<a name="line.377"></a>
<FONT color="green">378</FONT>            this.markerBand = band;<a name="line.378"></a>
<FONT color="green">379</FONT>            notifyListeners(new AxisChangeEvent(this));<a name="line.379"></a>
<FONT color="green">380</FONT>        }<a name="line.380"></a>
<FONT color="green">381</FONT>    <a name="line.381"></a>
<FONT color="green">382</FONT>        /**<a name="line.382"></a>
<FONT color="green">383</FONT>         * Configures the axis to work with the specified plot.  If the axis has<a name="line.383"></a>
<FONT color="green">384</FONT>         * auto-scaling, then sets the maximum and minimum values.<a name="line.384"></a>
<FONT color="green">385</FONT>         */<a name="line.385"></a>
<FONT color="green">386</FONT>        public void configure() {<a name="line.386"></a>
<FONT color="green">387</FONT>            if (isAutoRange()) {<a name="line.387"></a>
<FONT color="green">388</FONT>                autoAdjustRange();<a name="line.388"></a>
<FONT color="green">389</FONT>            }<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>         * Rescales the axis to ensure that all data is visible.<a name="line.393"></a>
<FONT color="green">394</FONT>         */<a name="line.394"></a>
<FONT color="green">395</FONT>        protected void autoAdjustRange() {<a name="line.395"></a>
<FONT color="green">396</FONT>    <a name="line.396"></a>
<FONT color="green">397</FONT>            Plot plot = getPlot();<a name="line.397"></a>
<FONT color="green">398</FONT>            if (plot == null) {<a name="line.398"></a>
<FONT color="green">399</FONT>                return;  // no plot, no data<a name="line.399"></a>
<FONT color="green">400</FONT>            }<a name="line.400"></a>
<FONT color="green">401</FONT>    <a name="line.401"></a>
<FONT color="green">402</FONT>            if (plot instanceof ValueAxisPlot) {<a name="line.402"></a>
<FONT color="green">403</FONT>                ValueAxisPlot vap = (ValueAxisPlot) plot;<a name="line.403"></a>
<FONT color="green">404</FONT>    <a name="line.404"></a>
<FONT color="green">405</FONT>                Range r = vap.getDataRange(this);<a name="line.405"></a>
<FONT color="green">406</FONT>                if (r == null) {<a name="line.406"></a>
<FONT color="green">407</FONT>                    r = new Range(DEFAULT_LOWER_BOUND, DEFAULT_UPPER_BOUND);<a name="line.407"></a>
<FONT color="green">408</FONT>                }<a name="line.408"></a>
<FONT color="green">409</FONT>                <a name="line.409"></a>
<FONT color="green">410</FONT>                double upper = r.getUpperBound();<a name="line.410"></a>
<FONT color="green">411</FONT>                double lower = r.getLowerBound();<a name="line.411"></a>
<FONT color="green">412</FONT>                if (this.rangeType == RangeType.POSITIVE) {<a name="line.412"></a>
<FONT color="green">413</FONT>                    lower = Math.max(0.0, lower);<a name="line.413"></a>
<FONT color="green">414</FONT>                    upper = Math.max(0.0, upper);<a name="line.414"></a>
<FONT color="green">415</FONT>                }<a name="line.415"></a>
<FONT color="green">416</FONT>                else if (this.rangeType == RangeType.NEGATIVE) {<a name="line.416"></a>
<FONT color="green">417</FONT>                    lower = Math.min(0.0, lower);<a name="line.417"></a>