xysteparearenderer.html

jfreechart1。0。2的api。

<FONT color="green">314</FONT>         *                        (&lt;code&gt;null&lt;/code&gt; permitted).<a name="line.314"></a>
<FONT color="green">315</FONT>         * @param pass  the pass index.<a name="line.315"></a>
<FONT color="green">316</FONT>         */<a name="line.316"></a>
<FONT color="green">317</FONT>        public void drawItem(Graphics2D g2,<a name="line.317"></a>
<FONT color="green">318</FONT>                             XYItemRendererState state,<a name="line.318"></a>
<FONT color="green">319</FONT>                             Rectangle2D dataArea,<a name="line.319"></a>
<FONT color="green">320</FONT>                             PlotRenderingInfo info,<a name="line.320"></a>
<FONT color="green">321</FONT>                             XYPlot plot,<a name="line.321"></a>
<FONT color="green">322</FONT>                             ValueAxis domainAxis,<a name="line.322"></a>
<FONT color="green">323</FONT>                             ValueAxis rangeAxis,<a name="line.323"></a>
<FONT color="green">324</FONT>                             XYDataset dataset,<a name="line.324"></a>
<FONT color="green">325</FONT>                             int series,<a name="line.325"></a>
<FONT color="green">326</FONT>                             int item,<a name="line.326"></a>
<FONT color="green">327</FONT>                             CrosshairState crosshairState,<a name="line.327"></a>
<FONT color="green">328</FONT>                             int pass) {<a name="line.328"></a>
<FONT color="green">329</FONT>                                 <a name="line.329"></a>
<FONT color="green">330</FONT>            PlotOrientation orientation = plot.getOrientation();<a name="line.330"></a>
<FONT color="green">331</FONT>            <a name="line.331"></a>
<FONT color="green">332</FONT>            // Get the item count for the series, so that we can know which is the <a name="line.332"></a>
<FONT color="green">333</FONT>            // end of the series.<a name="line.333"></a>
<FONT color="green">334</FONT>            int itemCount = dataset.getItemCount(series);<a name="line.334"></a>
<FONT color="green">335</FONT>    <a name="line.335"></a>
<FONT color="green">336</FONT>            Paint paint = getItemPaint(series, item);<a name="line.336"></a>
<FONT color="green">337</FONT>            Stroke seriesStroke = getItemStroke(series, item);<a name="line.337"></a>
<FONT color="green">338</FONT>            g2.setPaint(paint);<a name="line.338"></a>
<FONT color="green">339</FONT>            g2.setStroke(seriesStroke);<a name="line.339"></a>
<FONT color="green">340</FONT>    <a name="line.340"></a>
<FONT color="green">341</FONT>            // get the data point...<a name="line.341"></a>
<FONT color="green">342</FONT>            double x1 = dataset.getXValue(series, item);<a name="line.342"></a>
<FONT color="green">343</FONT>            double y1 = dataset.getYValue(series, item);<a name="line.343"></a>
<FONT color="green">344</FONT>            double x = x1;<a name="line.344"></a>
<FONT color="green">345</FONT>            double y = Double.isNaN(y1) ? getRangeBase() : y1;<a name="line.345"></a>
<FONT color="green">346</FONT>            double transX1 = domainAxis.valueToJava2D(x, dataArea, <a name="line.346"></a>
<FONT color="green">347</FONT>                    plot.getDomainAxisEdge());<a name="line.347"></a>
<FONT color="green">348</FONT>            double transY1 = rangeAxis.valueToJava2D(y, dataArea, <a name="line.348"></a>
<FONT color="green">349</FONT>                    plot.getRangeAxisEdge());<a name="line.349"></a>
<FONT color="green">350</FONT>                                                              <a name="line.350"></a>
<FONT color="green">351</FONT>            // avoid possible sun.dc.pr.PRException: endPath: bad path<a name="line.351"></a>
<FONT color="green">352</FONT>            transY1 = restrictValueToDataArea(transY1, plot, dataArea);         <a name="line.352"></a>
<FONT color="green">353</FONT>    <a name="line.353"></a>
<FONT color="green">354</FONT>            if (this.pArea == null &amp;&amp; !Double.isNaN(y1)) {<a name="line.354"></a>
<FONT color="green">355</FONT>    <a name="line.355"></a>
<FONT color="green">356</FONT>                // Create a new Area for the series<a name="line.356"></a>
<FONT color="green">357</FONT>                this.pArea = new Polygon();<a name="line.357"></a>
<FONT color="green">358</FONT>            <a name="line.358"></a>
<FONT color="green">359</FONT>                // start from Y = rangeBase<a name="line.359"></a>
<FONT color="green">360</FONT>                double transY2 = rangeAxis.valueToJava2D(getRangeBase(), dataArea,<a name="line.360"></a>
<FONT color="green">361</FONT>                        plot.getRangeAxisEdge());<a name="line.361"></a>
<FONT color="green">362</FONT>            <a name="line.362"></a>
<FONT color="green">363</FONT>                // avoid possible sun.dc.pr.PRException: endPath: bad path<a name="line.363"></a>
<FONT color="green">364</FONT>                transY2 = restrictValueToDataArea(transY2, plot, dataArea);         <a name="line.364"></a>
<FONT color="green">365</FONT>            <a name="line.365"></a>
<FONT color="green">366</FONT>                // The first point is (x, this.baseYValue)<a name="line.366"></a>
<FONT color="green">367</FONT>                if (orientation == PlotOrientation.VERTICAL) {<a name="line.367"></a>
<FONT color="green">368</FONT>                    this.pArea.addPoint((int) transX1, (int) transY2);<a name="line.368"></a>
<FONT color="green">369</FONT>                }<a name="line.369"></a>
<FONT color="green">370</FONT>                else if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.370"></a>
<FONT color="green">371</FONT>                    this.pArea.addPoint((int) transY2, (int) transX1);<a name="line.371"></a>
<FONT color="green">372</FONT>                }<a name="line.372"></a>
<FONT color="green">373</FONT>            }<a name="line.373"></a>
<FONT color="green">374</FONT>    <a name="line.374"></a>
<FONT color="green">375</FONT>            double transX0 = 0;<a name="line.375"></a>
<FONT color="green">376</FONT>            double transY0 = restrictValueToDataArea(<a name="line.376"></a>
<FONT color="green">377</FONT>                getRangeBase(), plot, dataArea<a name="line.377"></a>
<FONT color="green">378</FONT>            );           <a name="line.378"></a>
<FONT color="green">379</FONT>            <a name="line.379"></a>
<FONT color="green">380</FONT>            double x0;<a name="line.380"></a>
<FONT color="green">381</FONT>            double y0;<a name="line.381"></a>
<FONT color="green">382</FONT>            if (item &gt; 0) {<a name="line.382"></a>
<FONT color="green">383</FONT>                // get the previous data point...<a name="line.383"></a>
<FONT color="green">384</FONT>                x0 = dataset.getXValue(series, item - 1);<a name="line.384"></a>
<FONT color="green">385</FONT>                y0 = Double.isNaN(y1) ? y1 : dataset.getYValue(series, item - 1);<a name="line.385"></a>
<FONT color="green">386</FONT>    <a name="line.386"></a>
<FONT color="green">387</FONT>                x = x0;<a name="line.387"></a>
<FONT color="green">388</FONT>                y = Double.isNaN(y0) ? getRangeBase() : y0;<a name="line.388"></a>
<FONT color="green">389</FONT>                transX0 = domainAxis.valueToJava2D(x, dataArea, <a name="line.389"></a>
<FONT color="green">390</FONT>                        plot.getDomainAxisEdge());<a name="line.390"></a>
<FONT color="green">391</FONT>                transY0 = rangeAxis.valueToJava2D(y, dataArea, <a name="line.391"></a>
<FONT color="green">392</FONT>                        plot.getRangeAxisEdge());<a name="line.392"></a>
<FONT color="green">393</FONT>    <a name="line.393"></a>
<FONT color="green">394</FONT>                // avoid possible sun.dc.pr.PRException: endPath: bad path<a name="line.394"></a>
<FONT color="green">395</FONT>                transY0 = restrictValueToDataArea(transY0, plot, dataArea);<a name="line.395"></a>
<FONT color="green">396</FONT>                            <a name="line.396"></a>
<FONT color="green">397</FONT>                if (Double.isNaN(y1)) {<a name="line.397"></a>
<FONT color="green">398</FONT>                    // NULL value -&gt; insert point on base line<a name="line.398"></a>
<FONT color="green">399</FONT>                    // instead of 'step point'<a name="line.399"></a>
<FONT color="green">400</FONT>                    transX1 = transX0;<a name="line.400"></a>
<FONT color="green">401</FONT>                    transY0 = transY1;          <a name="line.401"></a>
<FONT color="green">402</FONT>                }<a name="line.402"></a>
<FONT color="green">403</FONT>                if (transY0 != transY1) {<a name="line.403"></a>
<FONT color="green">404</FONT>                    // not just a horizontal bar but need to perform a 'step'.<a name="line.404"></a>
<FONT color="green">405</FONT>                    if (orientation == PlotOrientation.VERTICAL) {<a name="line.405"></a>
<FONT color="green">406</FONT>                        this.pArea.addPoint((int) transX1, (int) transY0);<a name="line.406"></a>
<FONT color="green">407</FONT>                    }<a name="line.407"></a>
<FONT color="green">408</FONT>                    else if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.408"></a>
<FONT color="green">409</FONT>                        this.pArea.addPoint((int) transY0, (int) transX1);<a name="line.409"></a>
<FONT color="green">410</FONT>                    }<a name="line.410"></a>
<FONT color="green">411</FONT>                }<a name="line.411"></a>
<FONT color="green">412</FONT>            }           <a name="line.412"></a>
<FONT color="green">413</FONT>    <a name="line.413"></a>
<FONT color="green">414</FONT>            Shape shape = null;<a name="line.414"></a>
<FONT color="green">415</FONT>            if (!Double.isNaN(y1)) {<a name="line.415"></a>
<FONT color="green">416</FONT>                // Add each point to Area (x, y)<a name="line.416"></a>
<FONT color="green">417</FONT>                if (orientation == PlotOrientation.VERTICAL) {<a name="line.417"></a>
<FONT color="green">418</FONT>                    this.pArea.addPoint((int) transX1, (int) transY1);<a name="line.418"></a>
<FONT color="green">419</FONT>                }<a name="line.419"></a>
<FONT color="green">420</FONT>                else if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.420"></a>
<FONT color="green">421</FONT>                    this.pArea.addPoint((int) transY1, (int) transX1);<a name="line.421"></a>
<FONT color="green">422</FONT>                }<a name="line.422"></a>
<FONT color="green">423</FONT>    <a name="line.423"></a>
<FONT color="green">424</FONT>                if (getShapesVisible()) {<a name="line.424"></a>
<FONT color="green">425</FONT>                    shape = getItemShape(series, item);<a name="line.425"></a>
<FONT color="green">426</FONT>                    if (orientation == PlotOrientation.VERTICAL) {<a name="line.426"></a>
<FONT color="green">427</FONT>                        shape = ShapeUtilities.createTranslatedShape(shape, <a name="line.427"></a>
<FONT color="green">428</FONT>                                transX1, transY1);<a name="line.428"></a>
<FONT color="green">429</FONT>                    }<a name="line.429"></a>
<FONT color="green">430</FONT>                    else if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.430"></a>
<FONT color="green">431</FONT>                        shape = ShapeUtilities.createTranslatedShape(shape, <a name="line.431"></a>
<FONT color="green">432</FONT>                                transY1, transX1);<a name="line.432"></a>
<FONT color="green">433</FONT>                    }<a name="line.433"></a>
<FONT color="green">434</FONT>                    if (isShapesFilled()) {<a name="line.434"></a>
<FONT color="green">435</FONT>                        g2.fill(shape);<a name="line.435"></a>
<FONT color="green">436</FONT>                    }   <a name="line.436"></a>
<FONT color="green">437</FONT>                    else {<a name="line.437"></a>
<FONT color="green">438</FONT>                        g2.draw(shape);<a name="line.438"></a>
<FONT color="green">439</FONT>                    }   <a name="line.439"></a>
<FONT color="green">440</FONT>                }<a name="line.440"></a>
<FONT color="green">441</FONT>                else {<a name="line.441"></a>
<FONT color="green">442</FONT>                    if (orientation == PlotOrientation.VERTICAL) {<a name="line.442"></a>
<FONT color="green">443</FONT>                        shape = new Rectangle2D.Double(transX1 - 2, transY1 - 2, <a name="line.443"></a>
<FONT color="green">444</FONT>                                4.0, 4.0);<a name="line.444"></a>
<FONT color="green">445</FONT>                    }<a name="line.445"></a>
<FONT color="green">446</FONT>                    else if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.446"></a>
<FONT color="green">447</FONT>                        shape = new Rectangle2D.Double(transY1 - 2, transX1 - 2, <a name="line.447"></a>
<FONT color="green">448</FONT>                                4.0, 4.0);<a name="line.448"></a>
<FONT color="green">449</FONT>                    }<a name="line.449"></a>
<FONT color="green">450</FONT>                }<a name="line.450"></a>
<FONT color="green">451</FONT>            }<a name="line.451"></a>
<FONT color="green">452</FONT>    <a name="line.452"></a>
<FONT color="green">453</FONT>            // Check if the item is the last item for the series or if it<a name="line.453"></a>
<FONT color="green">454</FONT>            // is a NULL value and number of items &gt; 0.  We can't draw an area for <a name="line.454"></a>
<FONT color="green">455</FONT>            // a single point.<a name="line.455"></a>
<FONT color="green">456</FONT>            if (getPlotArea() &amp;&amp; item &gt; 0 &amp;&amp; this.pArea != null <a name="line.456"></a>
<FONT color="green">457</FONT>                              &amp;&amp; (item == (itemCount - 1) || Double.isNaN(y1))) {<a name="line.457"></a>
<FONT color="green">458</FONT>    <a name="line.458"></a>
<FONT color="green">459</FONT>                double transY2 = rangeAxis.valueToJava2D(getRangeBase(), dataArea, <a name="line.459"></a>
<FONT color="green">460</FONT>                        plot.getRangeAxisEdge());<a name="line.460"></a>
<FONT color="green">461</FONT>    <a name="line.461"></a>
<FONT color="green">462</FONT>                // avoid possible sun.dc.pr.PRException: endPath: bad path<a name="line.462"></a>
<FONT color="green">463</FONT>                transY2 = restrictValueToDataArea(transY2, plot, dataArea);         <a name="line.463"></a>
<FONT color="green">464</FONT>    <a name="line.464"></a>
<FONT color="green">465</FONT>                if (orientation == PlotOrientation.VERTICAL) {<a name="line.465"></a>
<FONT color="green">466</FONT>                    // Add the last point (x,0)<a name="line.466"></a>
<FONT color="green">467</FONT>                    this.pArea.addPoint((int) transX1, (int) transY2);<a name="line.467"></a>
<FONT color="green">468</FONT>                }<a name="line.468"></a>
<FONT color="green">469</FONT>                else if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.469"></a>
<FONT color="green">470</FONT>                    // Add the last point (x,0)<a name="line.470"></a>
<FONT color="green">471</FONT>                    this.pArea.addPoint((int) transY2, (int) transX1);<a name="line.471"></a>