crosshairstate.html

jfreechart1。0。2的api。

<FONT color="green">156</FONT>                }<a name="line.156"></a>
<FONT color="green">157</FONT>            }<a name="line.157"></a>
<FONT color="green">158</FONT>    <a name="line.158"></a>
<FONT color="green">159</FONT>        }<a name="line.159"></a>
<FONT color="green">160</FONT>    <a name="line.160"></a>
<FONT color="green">161</FONT>        /**<a name="line.161"></a>
<FONT color="green">162</FONT>         * Evaluates an x-value and if it is the closest to the anchor point it<a name="line.162"></a>
<FONT color="green">163</FONT>         * becomes the new crosshair point.<a name="line.163"></a>
<FONT color="green">164</FONT>         * &lt;P&gt;<a name="line.164"></a>
<FONT color="green">165</FONT>         * Used in cases where only the x-axis is numerical.<a name="line.165"></a>
<FONT color="green">166</FONT>         *<a name="line.166"></a>
<FONT color="green">167</FONT>         * @param candidateX  x position of the candidate for the new crosshair <a name="line.167"></a>
<FONT color="green">168</FONT>         *                    point.<a name="line.168"></a>
<FONT color="green">169</FONT>         */<a name="line.169"></a>
<FONT color="green">170</FONT>        public void updateCrosshairX(double candidateX) {<a name="line.170"></a>
<FONT color="green">171</FONT>    <a name="line.171"></a>
<FONT color="green">172</FONT>            double d = Math.abs(candidateX - this.anchorX);<a name="line.172"></a>
<FONT color="green">173</FONT>            if (d &lt; this.distance) {<a name="line.173"></a>
<FONT color="green">174</FONT>                this.crosshairX = candidateX;<a name="line.174"></a>
<FONT color="green">175</FONT>                this.distance = d;<a name="line.175"></a>
<FONT color="green">176</FONT>            }<a name="line.176"></a>
<FONT color="green">177</FONT>    <a name="line.177"></a>
<FONT color="green">178</FONT>        }<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>         * Evaluates a y-value and if it is the closest to the anchor point it<a name="line.181"></a>
<FONT color="green">182</FONT>         * becomes the new crosshair point.<a name="line.182"></a>
<FONT color="green">183</FONT>         * &lt;P&gt;<a name="line.183"></a>
<FONT color="green">184</FONT>         * Used in cases where only the y-axis is numerical.<a name="line.184"></a>
<FONT color="green">185</FONT>         *<a name="line.185"></a>
<FONT color="green">186</FONT>         * @param candidateY  y position of the candidate for the new crosshair <a name="line.186"></a>
<FONT color="green">187</FONT>         *                    point.<a name="line.187"></a>
<FONT color="green">188</FONT>         */<a name="line.188"></a>
<FONT color="green">189</FONT>        public void updateCrosshairY(double candidateY) {<a name="line.189"></a>
<FONT color="green">190</FONT>    <a name="line.190"></a>
<FONT color="green">191</FONT>            double d = Math.abs(candidateY - this.anchorY);<a name="line.191"></a>
<FONT color="green">192</FONT>            if (d &lt; this.distance) {<a name="line.192"></a>
<FONT color="green">193</FONT>                this.crosshairY = candidateY;<a name="line.193"></a>
<FONT color="green">194</FONT>                this.distance = d;<a name="line.194"></a>
<FONT color="green">195</FONT>            }<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>    <a name="line.198"></a>
<FONT color="green">199</FONT>        /** <a name="line.199"></a>
<FONT color="green">200</FONT>         * Sets the anchor point.  This is usually the mouse click point in a chart<a name="line.200"></a>
<FONT color="green">201</FONT>         * panel, and the crosshair point will often be the data item that is <a name="line.201"></a>
<FONT color="green">202</FONT>         * closest to the anchor point.<a name="line.202"></a>
<FONT color="green">203</FONT>         * <a name="line.203"></a>
<FONT color="green">204</FONT>         * @param anchor  the anchor point.<a name="line.204"></a>
<FONT color="green">205</FONT>         */<a name="line.205"></a>
<FONT color="green">206</FONT>        public void setAnchor(Point2D anchor) {<a name="line.206"></a>
<FONT color="green">207</FONT>            this.anchor = anchor;<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>         * Get the x-value for the crosshair point.<a name="line.211"></a>
<FONT color="green">212</FONT>         *<a name="line.212"></a>
<FONT color="green">213</FONT>         * @return The x position of the crosshair point.<a name="line.213"></a>
<FONT color="green">214</FONT>         */<a name="line.214"></a>
<FONT color="green">215</FONT>        public double getCrosshairX() {<a name="line.215"></a>
<FONT color="green">216</FONT>            return this.crosshairX;<a name="line.216"></a>
<FONT color="green">217</FONT>        }<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>         * Sets the x coordinate for the crosshair.  This is the coordinate in data<a name="line.220"></a>
<FONT color="green">221</FONT>         * space measured against the domain axis.<a name="line.221"></a>
<FONT color="green">222</FONT>         * <a name="line.222"></a>
<FONT color="green">223</FONT>         * @param x the coordinate.<a name="line.223"></a>
<FONT color="green">224</FONT>         */<a name="line.224"></a>
<FONT color="green">225</FONT>        public void setCrosshairX(double x) {<a name="line.225"></a>
<FONT color="green">226</FONT>            this.crosshairX = x;<a name="line.226"></a>
<FONT color="green">227</FONT>        }<a name="line.227"></a>
<FONT color="green">228</FONT>    <a name="line.228"></a>
<FONT color="green">229</FONT>        /**<a name="line.229"></a>
<FONT color="green">230</FONT>         * Get the y-value for the crosshair point.  This is the coordinate in data<a name="line.230"></a>
<FONT color="green">231</FONT>         * space measured against the range axis.<a name="line.231"></a>
<FONT color="green">232</FONT>         *<a name="line.232"></a>
<FONT color="green">233</FONT>         * @return The y position of the crosshair point.<a name="line.233"></a>
<FONT color="green">234</FONT>         */<a name="line.234"></a>
<FONT color="green">235</FONT>        public double getCrosshairY() {<a name="line.235"></a>
<FONT color="green">236</FONT>            return this.crosshairY;<a name="line.236"></a>
<FONT color="green">237</FONT>        }<a name="line.237"></a>
<FONT color="green">238</FONT>    <a name="line.238"></a>
<FONT color="green">239</FONT>        /**<a name="line.239"></a>
<FONT color="green">240</FONT>         * Sets the y coordinate for the crosshair.<a name="line.240"></a>
<FONT color="green">241</FONT>         * <a name="line.241"></a>
<FONT color="green">242</FONT>         * @param y  the y coordinate.<a name="line.242"></a>
<FONT color="green">243</FONT>         */<a name="line.243"></a>
<FONT color="green">244</FONT>        public void setCrosshairY(double y) {<a name="line.244"></a>
<FONT color="green">245</FONT>            this.crosshairY = y;<a name="line.245"></a>
<FONT color="green">246</FONT>        }<a name="line.246"></a>
<FONT color="green">247</FONT>    <a name="line.247"></a>
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