intervalxydelegate.html

jfreechart1。0。2的api。

<FONT color="green">174</FONT>         * <a name="line.174"></a>
<FONT color="green">175</FONT>         * @return The interval position factor.<a name="line.175"></a>
<FONT color="green">176</FONT>         */<a name="line.176"></a>
<FONT color="green">177</FONT>        public double getIntervalPositionFactor() {<a name="line.177"></a>
<FONT color="green">178</FONT>            return this.intervalPositionFactor;<a name="line.178"></a>
<FONT color="green">179</FONT>        }<a name="line.179"></a>
<FONT color="green">180</FONT>    <a name="line.180"></a>
<FONT color="green">181</FONT>        /**<a name="line.181"></a>
<FONT color="green">182</FONT>         * Sets the interval position factor.  This controls how the interval is<a name="line.182"></a>
<FONT color="green">183</FONT>         * aligned to the x-value.  For a value of 0.5, the interval is aligned<a name="line.183"></a>
<FONT color="green">184</FONT>         * with the x-value in the center.  For a value of 0.0, the interval is<a name="line.184"></a>
<FONT color="green">185</FONT>         * aligned with the x-value at the lower end of the interval, and for a <a name="line.185"></a>
<FONT color="green">186</FONT>         * value of 1.0, the interval is aligned with the x-value at the upper<a name="line.186"></a>
<FONT color="green">187</FONT>         * end of the interval.<a name="line.187"></a>
<FONT color="green">188</FONT>         * <a name="line.188"></a>
<FONT color="green">189</FONT>         * Note that changing the interval position factor amounts to changing the <a name="line.189"></a>
<FONT color="green">190</FONT>         * data values represented by the dataset.  Therefore, the dataset that is <a name="line.190"></a>
<FONT color="green">191</FONT>         * using this delegate is responsible for generating the <a name="line.191"></a>
<FONT color="green">192</FONT>         * appropriate {@link DatasetChangeEvent}.     <a name="line.192"></a>
<FONT color="green">193</FONT>         * <a name="line.193"></a>
<FONT color="green">194</FONT>         * @param d  the new interval position factor (in the range <a name="line.194"></a>
<FONT color="green">195</FONT>         *           &lt;code&gt;0.0&lt;/code&gt; to &lt;code&gt;1.0&lt;/code&gt; inclusive).<a name="line.195"></a>
<FONT color="green">196</FONT>         */<a name="line.196"></a>
<FONT color="green">197</FONT>        public void setIntervalPositionFactor(double d) {<a name="line.197"></a>
<FONT color="green">198</FONT>            if (d &lt; 0.0 || 1.0 &lt; d) {<a name="line.198"></a>
<FONT color="green">199</FONT>                throw new IllegalArgumentException(<a name="line.199"></a>
<FONT color="green">200</FONT>                        "Argument 'd' outside valid range.");<a name="line.200"></a>
<FONT color="green">201</FONT>            }<a name="line.201"></a>
<FONT color="green">202</FONT>            this.intervalPositionFactor = d;<a name="line.202"></a>
<FONT color="green">203</FONT>        }<a name="line.203"></a>
<FONT color="green">204</FONT>    <a name="line.204"></a>
<FONT color="green">205</FONT>        /**<a name="line.205"></a>
<FONT color="green">206</FONT>         * Returns the fixed interval width.<a name="line.206"></a>
<FONT color="green">207</FONT>         * <a name="line.207"></a>
<FONT color="green">208</FONT>         * @return The fixed interval width.<a name="line.208"></a>
<FONT color="green">209</FONT>         */<a name="line.209"></a>
<FONT color="green">210</FONT>        public double getFixedIntervalWidth() {<a name="line.210"></a>
<FONT color="green">211</FONT>            return this.fixedIntervalWidth;<a name="line.211"></a>
<FONT color="green">212</FONT>        }<a name="line.212"></a>
<FONT color="green">213</FONT>        <a name="line.213"></a>
<FONT color="green">214</FONT>        /**<a name="line.214"></a>
<FONT color="green">215</FONT>         * Sets the fixed interval width and, as a side effect, sets the<a name="line.215"></a>
<FONT color="green">216</FONT>         * &lt;code&gt;autoWidth&lt;/code&gt; flag to &lt;code&gt;false&lt;/code&gt;.  <a name="line.216"></a>
<FONT color="green">217</FONT>         * <a name="line.217"></a>
<FONT color="green">218</FONT>         * Note that changing the interval width amounts to changing the data <a name="line.218"></a>
<FONT color="green">219</FONT>         * values represented by the dataset.  Therefore, the dataset<a name="line.219"></a>
<FONT color="green">220</FONT>         * that is using this delegate is responsible for generating the <a name="line.220"></a>
<FONT color="green">221</FONT>         * appropriate {@link DatasetChangeEvent}.<a name="line.221"></a>
<FONT color="green">222</FONT>         * <a name="line.222"></a>
<FONT color="green">223</FONT>         * @param w  the width (negative values not permitted).<a name="line.223"></a>
<FONT color="green">224</FONT>         */<a name="line.224"></a>
<FONT color="green">225</FONT>        public void setFixedIntervalWidth(double w) {<a name="line.225"></a>
<FONT color="green">226</FONT>            if (w &lt; 0.0) {<a name="line.226"></a>
<FONT color="green">227</FONT>                throw new IllegalArgumentException("Negative 'w' argument.");<a name="line.227"></a>
<FONT color="green">228</FONT>            }<a name="line.228"></a>
<FONT color="green">229</FONT>            this.fixedIntervalWidth = w;<a name="line.229"></a>
<FONT color="green">230</FONT>            this.autoWidth = false;<a name="line.230"></a>
<FONT color="green">231</FONT>        }<a name="line.231"></a>
<FONT color="green">232</FONT>        <a name="line.232"></a>
<FONT color="green">233</FONT>        /**<a name="line.233"></a>
<FONT color="green">234</FONT>         * Returns the interval width.  This method will return either the <a name="line.234"></a>
<FONT color="green">235</FONT>         * auto calculated interval width or the manually specified interval<a name="line.235"></a>
<FONT color="green">236</FONT>         * width, depending on the {@link #isAutoWidth()} result.<a name="line.236"></a>
<FONT color="green">237</FONT>         * <a name="line.237"></a>
<FONT color="green">238</FONT>         * @return The interval width to use.<a name="line.238"></a>
<FONT color="green">239</FONT>         */<a name="line.239"></a>
<FONT color="green">240</FONT>        public double getIntervalWidth() {<a name="line.240"></a>
<FONT color="green">241</FONT>            if (isAutoWidth() &amp;&amp; !Double.isInfinite(this.autoIntervalWidth)) {<a name="line.241"></a>
<FONT color="green">242</FONT>                // everything is fine: autoWidth is on, and an autoIntervalWidth <a name="line.242"></a>
<FONT color="green">243</FONT>                // was set.<a name="line.243"></a>
<FONT color="green">244</FONT>                return this.autoIntervalWidth;<a name="line.244"></a>
<FONT color="green">245</FONT>            }<a name="line.245"></a>
<FONT color="green">246</FONT>            else {<a name="line.246"></a>
<FONT color="green">247</FONT>                // either autoWidth is off or autoIntervalWidth was not set.<a name="line.247"></a>
<FONT color="green">248</FONT>                return this.fixedIntervalWidth;<a name="line.248"></a>
<FONT color="green">249</FONT>            }<a name="line.249"></a>
<FONT color="green">250</FONT>        }<a name="line.250"></a>
<FONT color="green">251</FONT>    <a name="line.251"></a>
<FONT color="green">252</FONT>        /**<a name="line.252"></a>
<FONT color="green">253</FONT>         * Returns the start value of the x-interval for an item within a series.<a name="line.253"></a>
<FONT color="green">254</FONT>         * <a name="line.254"></a>
<FONT color="green">255</FONT>         * @param series  the series index.<a name="line.255"></a>
<FONT color="green">256</FONT>         * @param item  the item index.<a name="line.256"></a>
<FONT color="green">257</FONT>         * <a name="line.257"></a>
<FONT color="green">258</FONT>         * @return The start value of the x-interval (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.258"></a>
<FONT color="green">259</FONT>         * <a name="line.259"></a>
<FONT color="green">260</FONT>         * @see #getStartXValue(int, int)<a name="line.260"></a>
<FONT color="green">261</FONT>         */<a name="line.261"></a>
<FONT color="green">262</FONT>        public Number getStartX(int series, int item) {<a name="line.262"></a>
<FONT color="green">263</FONT>            Number startX = null;<a name="line.263"></a>
<FONT color="green">264</FONT>            Number x = this.dataset.getX(series, item);<a name="line.264"></a>
<FONT color="green">265</FONT>            if (x != null) {<a name="line.265"></a>
<FONT color="green">266</FONT>                startX = new Double(x.doubleValue() <a name="line.266"></a>
<FONT color="green">267</FONT>                         - (getIntervalPositionFactor() * getIntervalWidth())); <a name="line.267"></a>
<FONT color="green">268</FONT>            }<a name="line.268"></a>
<FONT color="green">269</FONT>            return startX;<a name="line.269"></a>
<FONT color="green">270</FONT>        }<a name="line.270"></a>
<FONT color="green">271</FONT>        <a name="line.271"></a>
<FONT color="green">272</FONT>        /**<a name="line.272"></a>
<FONT color="green">273</FONT>         * Returns the start value of the x-interval for an item within a series.<a name="line.273"></a>
<FONT color="green">274</FONT>         * <a name="line.274"></a>
<FONT color="green">275</FONT>         * @param series  the series index.<a name="line.275"></a>
<FONT color="green">276</FONT>         * @param item  the item index.<a name="line.276"></a>
<FONT color="green">277</FONT>         * <a name="line.277"></a>
<FONT color="green">278</FONT>         * @return The start value of the x-interval.<a name="line.278"></a>
<FONT color="green">279</FONT>         * <a name="line.279"></a>
<FONT color="green">280</FONT>         * @see #getStartX(int, int)<a name="line.280"></a>
<FONT color="green">281</FONT>         */<a name="line.281"></a>
<FONT color="green">282</FONT>        public double getStartXValue(int series, int item) {<a name="line.282"></a>
<FONT color="green">283</FONT>            return dataset.getXValue(series, item) - getIntervalPositionFactor() <a name="line.283"></a>
<FONT color="green">284</FONT>                * getIntervalWidth();<a name="line.284"></a>
<FONT color="green">285</FONT>        }<a name="line.285"></a>
<FONT color="green">286</FONT>        <a name="line.286"></a>
<FONT color="green">287</FONT>        /**<a name="line.287"></a>
<FONT color="green">288</FONT>         * Returns the end value of the x-interval for an item within a series.<a name="line.288"></a>
<FONT color="green">289</FONT>         * <a name="line.289"></a>
<FONT color="green">290</FONT>         * @param series  the series index.<a name="line.290"></a>
<FONT color="green">291</FONT>         * @param item  the item index.<a name="line.291"></a>
<FONT color="green">292</FONT>         * <a name="line.292"></a>
<FONT color="green">293</FONT>         * @return The end value of the x-interval (possibly &lt;code&gt;null&lt;/code&gt;).<a name="line.293"></a>
<FONT color="green">294</FONT>         * <a name="line.294"></a>
<FONT color="green">295</FONT>         * @see #getEndXValue(int, int)<a name="line.295"></a>
<FONT color="green">296</FONT>         */<a name="line.296"></a>
<FONT color="green">297</FONT>        public Number getEndX(int series, int item) {<a name="line.297"></a>
<FONT color="green">298</FONT>            Number endX = null;<a name="line.298"></a>
<FONT color="green">299</FONT>            Number x = this.dataset.getX(series, item);<a name="line.299"></a>
<FONT color="green">300</FONT>            if (x != null) {<a name="line.300"></a>
<FONT color="green">301</FONT>                endX = new Double(x.doubleValue() <a name="line.301"></a>
<FONT color="green">302</FONT>                    + ((1.0 - getIntervalPositionFactor()) * getIntervalWidth())); <a name="line.302"></a>
<FONT color="green">303</FONT>            }<a name="line.303"></a>
<FONT color="green">304</FONT>            return endX;<a name="line.304"></a>
<FONT color="green">305</FONT>        }<a name="line.305"></a>
<FONT color="green">306</FONT>    <a name="line.306"></a>
<FONT color="green">307</FONT>        /**<a name="line.307"></a>
<FONT color="green">308</FONT>         * Returns the end value of the x-interval for an item within a series.<a name="line.308"></a>
<FONT color="green">309</FONT>         * <a name="line.309"></a>
<FONT color="green">310</FONT>         * @param series  the series index.<a name="line.310"></a>
<FONT color="green">311</FONT>         * @param item  the item index.<a name="line.311"></a>
<FONT color="green">312</FONT>         * <a name="line.312"></a>
<FONT color="green">313</FONT>         * @return The end value of the x-interval.<a name="line.313"></a>
<FONT color="green">314</FONT>         * <a name="line.314"></a>
<FONT color="green">315</FONT>         * @see #getEndX(int, int)<a name="line.315"></a>
<FONT color="green">316</FONT>         */<a name="line.316"></a>
<FONT color="green">317</FONT>        public double getEndXValue(int series, int item) {<a name="line.317"></a>
<FONT color="green">318</FONT>            return dataset.getXValue(series, item) <a name="line.318"></a>
<FONT color="green">319</FONT>                + (1.0 - getIntervalPositionFactor()) * getIntervalWidth();<a name="line.319"></a>
<FONT color="green">320</FONT>        }<a name="line.320"></a>
<FONT color="green">321</FONT>        <a name="line.321"></a>
<FONT color="green">322</FONT>        /**<a name="line.322"></a>
<FONT color="green">323</FONT>         * Returns the minimum x-value in the dataset.<a name="line.323"></a>
<FONT color="green">324</FONT>         *<a name="line.324"></a>
<FONT color="green">325</FONT>         * @param includeInterval  a flag that determines whether or not the<a name="line.325"></a>
<FONT color="green">326</FONT>         *                         x-interval is taken into account.<a name="line.326"></a>
<FONT color="green">327</FONT>         * <a name="line.327"></a>
<FONT color="green">328</FONT>         * @return The minimum value.<a name="line.328"></a>
<FONT color="green">329</FONT>         */<a name="line.329"></a>
<FONT color="green">330</FONT>        public double getDomainLowerBound(boolean includeInterval) {<a name="line.330"></a>
<FONT color="green">331</FONT>            double result = Double.NaN;<a name="line.331"></a>
<FONT color="green">332</FONT>            Range r = getDomainBounds(includeInterval);<a name="line.332"></a>
<FONT color="green">333</FONT>            if (r != null) {<a name="line.333"></a>
<FONT color="green">334</FONT>                result = r.getLowerBound();<a name="line.334"></a>
<FONT color="green">335</FONT>            }<a name="line.335"></a>
<FONT color="green">336</FONT>            return result;<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 maximum x-value in the dataset.<a name="line.340"></a>
<FONT color="green">341</FONT>         *<a name="line.341"></a>
<FONT color="green">342</FONT>         * @param includeInterval  a flag that determines whether or not the<a name="line.342"></a>
<FONT color="green">343</FONT>         *                         x-interval is taken into account.<a name="line.343"></a>
<FONT color="green">344</FONT>         * <a name="line.344"></a>
<FONT color="green">345</FONT>         * @return The maximum value.<a name="line.345"></a>
<FONT color="green">346</FONT>         */<a name="line.346"></a>
<FONT color="green">347</FONT>        public double getDomainUpperBound(boolean includeInterval) {<a name="line.347"></a>
<FONT color="green">348</FONT>            double result = Double.NaN;<a name="line.348"></a>
<FONT color="green">349</FONT>            Range r = getDomainBounds(includeInterval);<a name="line.349"></a>