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jfreechart1。0。2的api。

<FONT color="green">171</FONT>         *                             permitted).<a name="line.171"></a>
<FONT color="green">172</FONT>         * @param verticalAlignment  the vertical alignment of the title (TOP, <a name="line.172"></a>
<FONT color="green">173</FONT>         *                           MIDDLE or BOTTOM, &lt;code&gt;null&lt;/code&gt; not <a name="line.173"></a>
<FONT color="green">174</FONT>         *                           permitted).<a name="line.174"></a>
<FONT color="green">175</FONT>         * @param padding  the amount of space to leave around the outside of the <a name="line.175"></a>
<FONT color="green">176</FONT>         *                 title (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.176"></a>
<FONT color="green">177</FONT>         */<a name="line.177"></a>
<FONT color="green">178</FONT>        protected Title(RectangleEdge position,<a name="line.178"></a>
<FONT color="green">179</FONT>                        HorizontalAlignment horizontalAlignment, <a name="line.179"></a>
<FONT color="green">180</FONT>                        VerticalAlignment verticalAlignment,<a name="line.180"></a>
<FONT color="green">181</FONT>                        RectangleInsets padding) {<a name="line.181"></a>
<FONT color="green">182</FONT>    <a name="line.182"></a>
<FONT color="green">183</FONT>            // check arguments...<a name="line.183"></a>
<FONT color="green">184</FONT>            if (position == null) {<a name="line.184"></a>
<FONT color="green">185</FONT>                throw new IllegalArgumentException("Null 'position' argument.");<a name="line.185"></a>
<FONT color="green">186</FONT>            }<a name="line.186"></a>
<FONT color="green">187</FONT>            if (horizontalAlignment == null) {<a name="line.187"></a>
<FONT color="green">188</FONT>                throw new IllegalArgumentException(<a name="line.188"></a>
<FONT color="green">189</FONT>                    "Null 'horizontalAlignment' argument."<a name="line.189"></a>
<FONT color="green">190</FONT>                );<a name="line.190"></a>
<FONT color="green">191</FONT>            }<a name="line.191"></a>
<FONT color="green">192</FONT>    <a name="line.192"></a>
<FONT color="green">193</FONT>            if (verticalAlignment == null) {<a name="line.193"></a>
<FONT color="green">194</FONT>                throw new IllegalArgumentException(<a name="line.194"></a>
<FONT color="green">195</FONT>                    "Null 'verticalAlignment' argument."<a name="line.195"></a>
<FONT color="green">196</FONT>                );<a name="line.196"></a>
<FONT color="green">197</FONT>            }<a name="line.197"></a>
<FONT color="green">198</FONT>            if (padding == null) {<a name="line.198"></a>
<FONT color="green">199</FONT>                throw new IllegalArgumentException("Null 'spacer' argument.");<a name="line.199"></a>
<FONT color="green">200</FONT>            }<a name="line.200"></a>
<FONT color="green">201</FONT>    <a name="line.201"></a>
<FONT color="green">202</FONT>            this.position = position;<a name="line.202"></a>
<FONT color="green">203</FONT>            this.horizontalAlignment = horizontalAlignment;<a name="line.203"></a>
<FONT color="green">204</FONT>            this.verticalAlignment = verticalAlignment;<a name="line.204"></a>
<FONT color="green">205</FONT>            setPadding(padding);<a name="line.205"></a>
<FONT color="green">206</FONT>            this.listenerList = new EventListenerList();<a name="line.206"></a>
<FONT color="green">207</FONT>            this.notify = true;<a name="line.207"></a>
<FONT color="green">208</FONT>    <a name="line.208"></a>
<FONT color="green">209</FONT>        }<a name="line.209"></a>
<FONT color="green">210</FONT>    <a name="line.210"></a>
<FONT color="green">211</FONT>        /**<a name="line.211"></a>
<FONT color="green">212</FONT>         * Returns the position of the title.<a name="line.212"></a>
<FONT color="green">213</FONT>         *<a name="line.213"></a>
<FONT color="green">214</FONT>         * @return The title position (never &lt;code&gt;null&lt;/code&gt;).<a name="line.214"></a>
<FONT color="green">215</FONT>         */<a name="line.215"></a>
<FONT color="green">216</FONT>        public RectangleEdge getPosition() {<a name="line.216"></a>
<FONT color="green">217</FONT>            return this.position;<a name="line.217"></a>
<FONT color="green">218</FONT>        }<a name="line.218"></a>
<FONT color="green">219</FONT>    <a name="line.219"></a>
<FONT color="green">220</FONT>        /**<a name="line.220"></a>
<FONT color="green">221</FONT>         * Sets the position for the title and sends a {@link TitleChangeEvent} to <a name="line.221"></a>
<FONT color="green">222</FONT>         * all registered listeners.<a name="line.222"></a>
<FONT color="green">223</FONT>         *<a name="line.223"></a>
<FONT color="green">224</FONT>         * @param position  the position (&lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.224"></a>
<FONT color="green">225</FONT>         */<a name="line.225"></a>
<FONT color="green">226</FONT>        public void setPosition(RectangleEdge position) {<a name="line.226"></a>
<FONT color="green">227</FONT>            if (position == null) {<a name="line.227"></a>
<FONT color="green">228</FONT>                throw new IllegalArgumentException("Null 'position' argument.");<a name="line.228"></a>
<FONT color="green">229</FONT>            }<a name="line.229"></a>
<FONT color="green">230</FONT>            if (this.position != position) {<a name="line.230"></a>
<FONT color="green">231</FONT>                this.position = position;<a name="line.231"></a>
<FONT color="green">232</FONT>                notifyListeners(new TitleChangeEvent(this));<a name="line.232"></a>
<FONT color="green">233</FONT>            }<a name="line.233"></a>
<FONT color="green">234</FONT>        }<a name="line.234"></a>
<FONT color="green">235</FONT>    <a name="line.235"></a>
<FONT color="green">236</FONT>        /**<a name="line.236"></a>
<FONT color="green">237</FONT>         * Returns the horizontal alignment of the title.<a name="line.237"></a>
<FONT color="green">238</FONT>         *<a name="line.238"></a>
<FONT color="green">239</FONT>         * @return The horizontal alignment (never &lt;code&gt;null&lt;/code&gt;).<a name="line.239"></a>
<FONT color="green">240</FONT>         */<a name="line.240"></a>
<FONT color="green">241</FONT>        public HorizontalAlignment getHorizontalAlignment() {<a name="line.241"></a>
<FONT color="green">242</FONT>            return this.horizontalAlignment;<a name="line.242"></a>
<FONT color="green">243</FONT>        }<a name="line.243"></a>
<FONT color="green">244</FONT>    <a name="line.244"></a>
<FONT color="green">245</FONT>        /**<a name="line.245"></a>
<FONT color="green">246</FONT>         * Sets the horizontal alignment for the title and sends a <a name="line.246"></a>
<FONT color="green">247</FONT>         * {@link TitleChangeEvent} to all registered listeners.<a name="line.247"></a>
<FONT color="green">248</FONT>         *<a name="line.248"></a>
<FONT color="green">249</FONT>         * @param alignment  the horizontal alignment (&lt;code&gt;null&lt;/code&gt; not <a name="line.249"></a>
<FONT color="green">250</FONT>         *                   permitted).<a name="line.250"></a>
<FONT color="green">251</FONT>         */<a name="line.251"></a>
<FONT color="green">252</FONT>        public void setHorizontalAlignment(HorizontalAlignment alignment) {<a name="line.252"></a>
<FONT color="green">253</FONT>            if (alignment == null) {<a name="line.253"></a>
<FONT color="green">254</FONT>                throw new IllegalArgumentException("Null 'alignment' argument.");<a name="line.254"></a>
<FONT color="green">255</FONT>            }<a name="line.255"></a>
<FONT color="green">256</FONT>            if (this.horizontalAlignment != alignment) {<a name="line.256"></a>
<FONT color="green">257</FONT>                this.horizontalAlignment = alignment;<a name="line.257"></a>
<FONT color="green">258</FONT>                notifyListeners(new TitleChangeEvent(this));<a name="line.258"></a>
<FONT color="green">259</FONT>            }<a name="line.259"></a>
<FONT color="green">260</FONT>        }<a name="line.260"></a>
<FONT color="green">261</FONT>    <a name="line.261"></a>
<FONT color="green">262</FONT>        /**<a name="line.262"></a>
<FONT color="green">263</FONT>         * Returns the vertical alignment of the title.<a name="line.263"></a>
<FONT color="green">264</FONT>         *<a name="line.264"></a>
<FONT color="green">265</FONT>         * @return The vertical alignment (never &lt;code&gt;null&lt;/code&gt;).<a name="line.265"></a>
<FONT color="green">266</FONT>         */<a name="line.266"></a>
<FONT color="green">267</FONT>        public VerticalAlignment getVerticalAlignment() {<a name="line.267"></a>
<FONT color="green">268</FONT>            return this.verticalAlignment;<a name="line.268"></a>
<FONT color="green">269</FONT>        }<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>         * Sets the vertical alignment for the title, and notifies any registered<a name="line.272"></a>
<FONT color="green">273</FONT>         * listeners of the change.<a name="line.273"></a>
<FONT color="green">274</FONT>         *<a name="line.274"></a>
<FONT color="green">275</FONT>         * @param alignment  the new vertical alignment (TOP, MIDDLE or BOTTOM, <a name="line.275"></a>
<FONT color="green">276</FONT>         *                   &lt;code&gt;null&lt;/code&gt; not permitted).<a name="line.276"></a>
<FONT color="green">277</FONT>         */<a name="line.277"></a>
<FONT color="green">278</FONT>        public void setVerticalAlignment(VerticalAlignment alignment) {<a name="line.278"></a>
<FONT color="green">279</FONT>            if (alignment == null) {<a name="line.279"></a>
<FONT color="green">280</FONT>                throw new IllegalArgumentException("Null 'alignment' argument.");<a name="line.280"></a>
<FONT color="green">281</FONT>            }<a name="line.281"></a>
<FONT color="green">282</FONT>            if (this.verticalAlignment != alignment) {<a name="line.282"></a>
<FONT color="green">283</FONT>                this.verticalAlignment = alignment;<a name="line.283"></a>
<FONT color="green">284</FONT>                notifyListeners(new TitleChangeEvent(this));<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>        /**<a name="line.288"></a>
<FONT color="green">289</FONT>         * Returns the flag that indicates whether or not the notification <a name="line.289"></a>
<FONT color="green">290</FONT>         * mechanism is enabled.<a name="line.290"></a>
<FONT color="green">291</FONT>         *<a name="line.291"></a>
<FONT color="green">292</FONT>         * @return The flag.<a name="line.292"></a>
<FONT color="green">293</FONT>         */<a name="line.293"></a>
<FONT color="green">294</FONT>        public boolean getNotify() {<a name="line.294"></a>
<FONT color="green">295</FONT>            return this.notify;<a name="line.295"></a>
<FONT color="green">296</FONT>        }<a name="line.296"></a>
<FONT color="green">297</FONT>    <a name="line.297"></a>
<FONT color="green">298</FONT>        /**<a name="line.298"></a>
<FONT color="green">299</FONT>         * Sets the flag that indicates whether or not the notification mechanism<a name="line.299"></a>
<FONT color="green">300</FONT>         * is enabled.  There are certain situations (such as cloning) where you<a name="line.300"></a>
<FONT color="green">301</FONT>         * want to turn notification off temporarily.<a name="line.301"></a>
<FONT color="green">302</FONT>         *<a name="line.302"></a>
<FONT color="green">303</FONT>         * @param flag  the new value of the flag.<a name="line.303"></a>
<FONT color="green">304</FONT>         */<a name="line.304"></a>
<FONT color="green">305</FONT>        public void setNotify(boolean flag) {<a name="line.305"></a>
<FONT color="green">306</FONT>            this.notify = flag;<a name="line.306"></a>
<FONT color="green">307</FONT>            if (flag) {<a name="line.307"></a>
<FONT color="green">308</FONT>                notifyListeners(new TitleChangeEvent(this));   <a name="line.308"></a>
<FONT color="green">309</FONT>            }<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>         * Draws the title on a Java 2D graphics device (such as the screen or a <a name="line.313"></a>
<FONT color="green">314</FONT>         * printer).<a name="line.314"></a>
<FONT color="green">315</FONT>         *<a name="line.315"></a>
<FONT color="green">316</FONT>         * @param g2  the graphics device.<a name="line.316"></a>
<FONT color="green">317</FONT>         * @param area  the area allocated for the title (subclasses should not<a name="line.317"></a>
<FONT color="green">318</FONT>         *              draw outside this area).<a name="line.318"></a>
<FONT color="green">319</FONT>         */<a name="line.319"></a>
<FONT color="green">320</FONT>        public abstract void draw(Graphics2D g2, Rectangle2D area);<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 a clone of the title.<a name="line.323"></a>
<FONT color="green">324</FONT>         * &lt;P&gt;<a name="line.324"></a>
<FONT color="green">325</FONT>         * One situation when this is useful is when editing the title properties -<a name="line.325"></a>
<FONT color="green">326</FONT>         * you can edit a clone, and then it is easier to cancel the changes if<a name="line.326"></a>
<FONT color="green">327</FONT>         * necessary.<a name="line.327"></a>
<FONT color="green">328</FONT>         *<a name="line.328"></a>
<FONT color="green">329</FONT>         * @return A clone of the title.<a name="line.329"></a>
<FONT color="green">330</FONT>         *<a name="line.330"></a>
<FONT color="green">331</FONT>         * @throws CloneNotSupportedException not thrown by this class, but it may <a name="line.331"></a>
<FONT color="green">332</FONT>         *         be thrown by subclasses.<a name="line.332"></a>
<FONT color="green">333</FONT>         */<a name="line.333"></a>
<FONT color="green">334</FONT>        public Object clone() throws CloneNotSupportedException {<a name="line.334"></a>
<FONT color="green">335</FONT>    <a name="line.335"></a>
<FONT color="green">336</FONT>            Title duplicate = (Title) super.clone();<a name="line.336"></a>
<FONT color="green">337</FONT>            duplicate.listenerList = new EventListenerList();<a name="line.337"></a>
<FONT color="green">338</FONT>            // RectangleInsets is immutable =&gt; same reference in clone OK<a name="line.338"></a>
<FONT color="green">339</FONT>            return duplicate;<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>        /**<a name="line.342"></a>
<FONT color="green">343</FONT>         * Registers an object for notification of changes to the title.<a name="line.343"></a>