layeredbarrenderer.html

jfreechart1。0。2的api。

<FONT color="green">140</FONT>            // another, so there is effectively only one bar per category for<a name="line.140"></a>
<FONT color="green">141</FONT>            // the purpose of the bar width calculation<a name="line.141"></a>
<FONT color="green">142</FONT>            CategoryAxis domainAxis = getDomainAxis(plot, rendererIndex);<a name="line.142"></a>
<FONT color="green">143</FONT>            CategoryDataset dataset = plot.getDataset(rendererIndex);<a name="line.143"></a>
<FONT color="green">144</FONT>            if (dataset != null) {<a name="line.144"></a>
<FONT color="green">145</FONT>                int columns = dataset.getColumnCount();<a name="line.145"></a>
<FONT color="green">146</FONT>                int rows = dataset.getRowCount();<a name="line.146"></a>
<FONT color="green">147</FONT>                double space = 0.0;<a name="line.147"></a>
<FONT color="green">148</FONT>                PlotOrientation orientation = plot.getOrientation();<a name="line.148"></a>
<FONT color="green">149</FONT>                if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.149"></a>
<FONT color="green">150</FONT>                    space = dataArea.getHeight();<a name="line.150"></a>
<FONT color="green">151</FONT>                }<a name="line.151"></a>
<FONT color="green">152</FONT>                else if (orientation == PlotOrientation.VERTICAL) {<a name="line.152"></a>
<FONT color="green">153</FONT>                    space = dataArea.getWidth();<a name="line.153"></a>
<FONT color="green">154</FONT>                }<a name="line.154"></a>
<FONT color="green">155</FONT>                double maxWidth = space * getMaximumBarWidth();<a name="line.155"></a>
<FONT color="green">156</FONT>                double categoryMargin = 0.0;<a name="line.156"></a>
<FONT color="green">157</FONT>                if (columns &gt; 1) {<a name="line.157"></a>
<FONT color="green">158</FONT>                    categoryMargin = domainAxis.getCategoryMargin();<a name="line.158"></a>
<FONT color="green">159</FONT>                }<a name="line.159"></a>
<FONT color="green">160</FONT>                double used = space * (1 - domainAxis.getLowerMargin() <a name="line.160"></a>
<FONT color="green">161</FONT>                    - domainAxis.getUpperMargin() - categoryMargin);<a name="line.161"></a>
<FONT color="green">162</FONT>                if ((rows * columns) &gt; 0) {<a name="line.162"></a>
<FONT color="green">163</FONT>                    state.setBarWidth(Math.min(used / (dataset.getColumnCount()), <a name="line.163"></a>
<FONT color="green">164</FONT>                            maxWidth));<a name="line.164"></a>
<FONT color="green">165</FONT>                } <a name="line.165"></a>
<FONT color="green">166</FONT>                else {<a name="line.166"></a>
<FONT color="green">167</FONT>                    state.setBarWidth(Math.min(used, maxWidth));<a name="line.167"></a>
<FONT color="green">168</FONT>                }<a name="line.168"></a>
<FONT color="green">169</FONT>            }<a name="line.169"></a>
<FONT color="green">170</FONT>        }<a name="line.170"></a>
<FONT color="green">171</FONT>    <a name="line.171"></a>
<FONT color="green">172</FONT>        /**<a name="line.172"></a>
<FONT color="green">173</FONT>         * Draws the bar for one item in the dataset.<a name="line.173"></a>
<FONT color="green">174</FONT>         *<a name="line.174"></a>
<FONT color="green">175</FONT>         * @param g2  the graphics device.<a name="line.175"></a>
<FONT color="green">176</FONT>         * @param state  the renderer state.<a name="line.176"></a>
<FONT color="green">177</FONT>         * @param dataArea  the plot area.<a name="line.177"></a>
<FONT color="green">178</FONT>         * @param plot  the plot.<a name="line.178"></a>
<FONT color="green">179</FONT>         * @param domainAxis  the domain (category) axis.<a name="line.179"></a>
<FONT color="green">180</FONT>         * @param rangeAxis  the range (value) axis.<a name="line.180"></a>
<FONT color="green">181</FONT>         * @param data  the data.<a name="line.181"></a>
<FONT color="green">182</FONT>         * @param row  the row index (zero-based).<a name="line.182"></a>
<FONT color="green">183</FONT>         * @param column  the column index (zero-based).<a name="line.183"></a>
<FONT color="green">184</FONT>         * @param pass  the pass index.<a name="line.184"></a>
<FONT color="green">185</FONT>         */<a name="line.185"></a>
<FONT color="green">186</FONT>        public void drawItem(Graphics2D g2,<a name="line.186"></a>
<FONT color="green">187</FONT>                             CategoryItemRendererState state,<a name="line.187"></a>
<FONT color="green">188</FONT>                             Rectangle2D dataArea,<a name="line.188"></a>
<FONT color="green">189</FONT>                             CategoryPlot plot,<a name="line.189"></a>
<FONT color="green">190</FONT>                             CategoryAxis domainAxis,<a name="line.190"></a>
<FONT color="green">191</FONT>                             ValueAxis rangeAxis,<a name="line.191"></a>
<FONT color="green">192</FONT>                             CategoryDataset data,<a name="line.192"></a>
<FONT color="green">193</FONT>                             int row,<a name="line.193"></a>
<FONT color="green">194</FONT>                             int column,<a name="line.194"></a>
<FONT color="green">195</FONT>                             int pass) {<a name="line.195"></a>
<FONT color="green">196</FONT>    <a name="line.196"></a>
<FONT color="green">197</FONT>            PlotOrientation orientation = plot.getOrientation();<a name="line.197"></a>
<FONT color="green">198</FONT>            if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.198"></a>
<FONT color="green">199</FONT>                drawHorizontalItem(g2, state, dataArea, plot, domainAxis, rangeAxis, <a name="line.199"></a>
<FONT color="green">200</FONT>                    data, row, column);<a name="line.200"></a>
<FONT color="green">201</FONT>            }<a name="line.201"></a>
<FONT color="green">202</FONT>            else if (orientation == PlotOrientation.VERTICAL) {<a name="line.202"></a>
<FONT color="green">203</FONT>                drawVerticalItem(g2, state, dataArea, plot, domainAxis, rangeAxis, <a name="line.203"></a>
<FONT color="green">204</FONT>                    data, row, column);<a name="line.204"></a>
<FONT color="green">205</FONT>            }<a name="line.205"></a>
<FONT color="green">206</FONT>    <a name="line.206"></a>
<FONT color="green">207</FONT>        }<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>         * Draws the bar for a single (series, category) data item.<a name="line.210"></a>
<FONT color="green">211</FONT>         *<a name="line.211"></a>
<FONT color="green">212</FONT>         * @param g2  the graphics device.<a name="line.212"></a>
<FONT color="green">213</FONT>         * @param state  the renderer state.<a name="line.213"></a>
<FONT color="green">214</FONT>         * @param dataArea  the data area.<a name="line.214"></a>
<FONT color="green">215</FONT>         * @param plot  the plot.<a name="line.215"></a>
<FONT color="green">216</FONT>         * @param domainAxis  the domain axis.<a name="line.216"></a>
<FONT color="green">217</FONT>         * @param rangeAxis  the range axis.<a name="line.217"></a>
<FONT color="green">218</FONT>         * @param data  the data.<a name="line.218"></a>
<FONT color="green">219</FONT>         * @param row  the row index (zero-based).<a name="line.219"></a>
<FONT color="green">220</FONT>         * @param column  the column index (zero-based).<a name="line.220"></a>
<FONT color="green">221</FONT>         */<a name="line.221"></a>
<FONT color="green">222</FONT>        protected void drawHorizontalItem(Graphics2D g2,<a name="line.222"></a>
<FONT color="green">223</FONT>                                          CategoryItemRendererState state,<a name="line.223"></a>
<FONT color="green">224</FONT>                                          Rectangle2D dataArea,<a name="line.224"></a>
<FONT color="green">225</FONT>                                          CategoryPlot plot,<a name="line.225"></a>
<FONT color="green">226</FONT>                                          CategoryAxis domainAxis,<a name="line.226"></a>
<FONT color="green">227</FONT>                                          ValueAxis rangeAxis,<a name="line.227"></a>
<FONT color="green">228</FONT>                                          CategoryDataset data,<a name="line.228"></a>
<FONT color="green">229</FONT>                                          int row,<a name="line.229"></a>
<FONT color="green">230</FONT>                                          int column) {<a name="line.230"></a>
<FONT color="green">231</FONT>    <a name="line.231"></a>
<FONT color="green">232</FONT>            // nothing is drawn for null values...<a name="line.232"></a>
<FONT color="green">233</FONT>            Number dataValue = data.getValue(row, column);<a name="line.233"></a>
<FONT color="green">234</FONT>            if (dataValue == null) {<a name="line.234"></a>
<FONT color="green">235</FONT>                return;<a name="line.235"></a>
<FONT color="green">236</FONT>            }<a name="line.236"></a>
<FONT color="green">237</FONT>    <a name="line.237"></a>
<FONT color="green">238</FONT>            // X<a name="line.238"></a>
<FONT color="green">239</FONT>            double value = dataValue.doubleValue();<a name="line.239"></a>
<FONT color="green">240</FONT>            double base = 0.0;<a name="line.240"></a>
<FONT color="green">241</FONT>            double lclip = getLowerClip();<a name="line.241"></a>
<FONT color="green">242</FONT>            double uclip = getUpperClip();<a name="line.242"></a>
<FONT color="green">243</FONT>            if (uclip &lt;= 0.0) {  // cases 1, 2, 3 and 4<a name="line.243"></a>
<FONT color="green">244</FONT>                if (value &gt;= uclip) {<a name="line.244"></a>
<FONT color="green">245</FONT>                    return; // bar is not visible<a name="line.245"></a>
<FONT color="green">246</FONT>                }<a name="line.246"></a>
<FONT color="green">247</FONT>                base = uclip;<a name="line.247"></a>
<FONT color="green">248</FONT>                if (value &lt;= lclip) {<a name="line.248"></a>
<FONT color="green">249</FONT>                    value = lclip;<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>            else if (lclip &lt;= 0.0) { // cases 5, 6, 7 and 8<a name="line.252"></a>
<FONT color="green">253</FONT>                if (value &gt;= uclip) {<a name="line.253"></a>
<FONT color="green">254</FONT>                    value = uclip;<a name="line.254"></a>
<FONT color="green">255</FONT>                }<a name="line.255"></a>
<FONT color="green">256</FONT>                else {<a name="line.256"></a>
<FONT color="green">257</FONT>                    if (value &lt;= lclip) {<a name="line.257"></a>
<FONT color="green">258</FONT>                        value = lclip;<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>            else { // cases 9, 10, 11 and 12<a name="line.262"></a>
<FONT color="green">263</FONT>                if (value &lt;= lclip) {<a name="line.263"></a>
<FONT color="green">264</FONT>                    return; // bar is not visible<a name="line.264"></a>
<FONT color="green">265</FONT>                }<a name="line.265"></a>
<FONT color="green">266</FONT>                base = lclip;<a name="line.266"></a>
<FONT color="green">267</FONT>                if (value &gt;= uclip) {<a name="line.267"></a>
<FONT color="green">268</FONT>                    value = uclip;<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>            RectangleEdge edge = plot.getRangeAxisEdge();<a name="line.272"></a>
<FONT color="green">273</FONT>            double transX1 = rangeAxis.valueToJava2D(base, dataArea, edge);<a name="line.273"></a>
<FONT color="green">274</FONT>            double transX2 = rangeAxis.valueToJava2D(value, dataArea, edge);<a name="line.274"></a>
<FONT color="green">275</FONT>            double rectX = Math.min(transX1, transX2);<a name="line.275"></a>
<FONT color="green">276</FONT>            double rectWidth = Math.abs(transX2 - transX1);<a name="line.276"></a>
<FONT color="green">277</FONT>    <a name="line.277"></a>
<FONT color="green">278</FONT>            // Y<a name="line.278"></a>
<FONT color="green">279</FONT>            double rectY = domainAxis.getCategoryMiddle(column, getColumnCount(), <a name="line.279"></a>
<FONT color="green">280</FONT>                    dataArea, plot.getDomainAxisEdge()) - state.getBarWidth() / 2.0;<a name="line.280"></a>
<FONT color="green">281</FONT>    <a name="line.281"></a>