📄 xyarearenderer.html
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<FONT color="green">348</FONT> String label = lg.generateLabel(dataset, series);<a name="line.348"></a><FONT color="green">349</FONT> String description = label;<a name="line.349"></a><FONT color="green">350</FONT> String toolTipText = null;<a name="line.350"></a><FONT color="green">351</FONT> if (getLegendItemToolTipGenerator() != null) {<a name="line.351"></a><FONT color="green">352</FONT> toolTipText = getLegendItemToolTipGenerator().generateLabel(<a name="line.352"></a><FONT color="green">353</FONT> dataset, series);<a name="line.353"></a><FONT color="green">354</FONT> }<a name="line.354"></a><FONT color="green">355</FONT> String urlText = null;<a name="line.355"></a><FONT color="green">356</FONT> if (getLegendItemURLGenerator() != null) {<a name="line.356"></a><FONT color="green">357</FONT> urlText = getLegendItemURLGenerator().generateLabel(<a name="line.357"></a><FONT color="green">358</FONT> dataset, series);<a name="line.358"></a><FONT color="green">359</FONT> }<a name="line.359"></a><FONT color="green">360</FONT> Paint paint = getSeriesPaint(series);<a name="line.360"></a><FONT color="green">361</FONT> result = new LegendItem(label, description, toolTipText, <a name="line.361"></a><FONT color="green">362</FONT> urlText, this.legendArea, paint);<a name="line.362"></a><FONT color="green">363</FONT> }<a name="line.363"></a><FONT color="green">364</FONT> }<a name="line.364"></a><FONT color="green">365</FONT> return result;<a name="line.365"></a><FONT color="green">366</FONT> }<a name="line.366"></a><FONT color="green">367</FONT> <a name="line.367"></a><FONT color="green">368</FONT> /**<a name="line.368"></a><FONT color="green">369</FONT> * Draws the visual representation of a single data item.<a name="line.369"></a><FONT color="green">370</FONT> *<a name="line.370"></a><FONT color="green">371</FONT> * @param g2 the graphics device.<a name="line.371"></a><FONT color="green">372</FONT> * @param state the renderer state.<a name="line.372"></a><FONT color="green">373</FONT> * @param dataArea the area within which the data is being drawn.<a name="line.373"></a><FONT color="green">374</FONT> * @param info collects information about the drawing.<a name="line.374"></a><FONT color="green">375</FONT> * @param plot the plot (can be used to obtain standard color information <a name="line.375"></a><FONT color="green">376</FONT> * etc).<a name="line.376"></a><FONT color="green">377</FONT> * @param domainAxis the domain axis.<a name="line.377"></a><FONT color="green">378</FONT> * @param rangeAxis the range axis.<a name="line.378"></a><FONT color="green">379</FONT> * @param dataset the dataset.<a name="line.379"></a><FONT color="green">380</FONT> * @param series the series index (zero-based).<a name="line.380"></a><FONT color="green">381</FONT> * @param item the item index (zero-based).<a name="line.381"></a><FONT color="green">382</FONT> * @param crosshairState crosshair information for the plot <a name="line.382"></a><FONT color="green">383</FONT> * (<code>null</code> permitted).<a name="line.383"></a><FONT color="green">384</FONT> * @param pass the pass index.<a name="line.384"></a><FONT color="green">385</FONT> */<a name="line.385"></a><FONT color="green">386</FONT> public void drawItem(Graphics2D g2, XYItemRendererState state,<a name="line.386"></a><FONT color="green">387</FONT> Rectangle2D dataArea, PlotRenderingInfo info, XYPlot plot,<a name="line.387"></a><FONT color="green">388</FONT> ValueAxis domainAxis, ValueAxis rangeAxis, XYDataset dataset,<a name="line.388"></a><FONT color="green">389</FONT> int series, int item, CrosshairState crosshairState, int pass) {<a name="line.389"></a><FONT color="green">390</FONT> <a name="line.390"></a><FONT color="green">391</FONT> if (!getItemVisible(series, item)) {<a name="line.391"></a><FONT color="green">392</FONT> return; <a name="line.392"></a><FONT color="green">393</FONT> }<a name="line.393"></a><FONT color="green">394</FONT> XYAreaRendererState areaState = (XYAreaRendererState) state;<a name="line.394"></a><FONT color="green">395</FONT> <a name="line.395"></a><FONT color="green">396</FONT> // get the data point...<a name="line.396"></a><FONT color="green">397</FONT> double x1 = dataset.getXValue(series, item);<a name="line.397"></a><FONT color="green">398</FONT> double y1 = dataset.getYValue(series, item);<a name="line.398"></a><FONT color="green">399</FONT> if (Double.isNaN(y1)) {<a name="line.399"></a><FONT color="green">400</FONT> y1 = 0.0;<a name="line.400"></a><FONT color="green">401</FONT> }<a name="line.401"></a><FONT color="green">402</FONT> double transX1 = domainAxis.valueToJava2D(x1, dataArea, <a name="line.402"></a><FONT color="green">403</FONT> plot.getDomainAxisEdge());<a name="line.403"></a><FONT color="green">404</FONT> double transY1 = rangeAxis.valueToJava2D(y1, dataArea, <a name="line.404"></a><FONT color="green">405</FONT> plot.getRangeAxisEdge());<a name="line.405"></a><FONT color="green">406</FONT> <a name="line.406"></a><FONT color="green">407</FONT> // get the previous point and the next point so we can calculate a <a name="line.407"></a><FONT color="green">408</FONT> // "hot spot" for the area (used by the chart entity)...<a name="line.408"></a><FONT color="green">409</FONT> int itemCount = dataset.getItemCount(series);<a name="line.409"></a><FONT color="green">410</FONT> double x0 = dataset.getXValue(series, Math.max(item - 1, 0));<a name="line.410"></a><FONT color="green">411</FONT> double y0 = dataset.getYValue(series, Math.max(item - 1, 0));<a name="line.411"></a><FONT color="green">412</FONT> if (Double.isNaN(y0)) {<a name="line.412"></a><FONT color="green">413</FONT> y0 = 0.0;<a name="line.413"></a><FONT color="green">414</FONT> }<a name="line.414"></a><FONT color="green">415</FONT> double transX0 = domainAxis.valueToJava2D(x0, dataArea, <a name="line.415"></a><FONT color="green">416</FONT> plot.getDomainAxisEdge());<a name="line.416"></a><FONT color="green">417</FONT> double transY0 = rangeAxis.valueToJava2D(y0, dataArea, <a name="line.417"></a><FONT color="green">418</FONT> plot.getRangeAxisEdge());<a name="line.418"></a><FONT color="green">419</FONT> <a name="line.419"></a><FONT color="green">420</FONT> double x2 = dataset.getXValue(series, Math.min(item + 1, <a name="line.420"></a><FONT color="green">421</FONT> itemCount - 1));<a name="line.421"></a><FONT color="green">422</FONT> double y2 = dataset.getYValue(series, Math.min(item + 1, <a name="line.422"></a><FONT color="green">423</FONT> itemCount - 1));<a name="line.423"></a><FONT color="green">424</FONT> if (Double.isNaN(y2)) {<a name="line.424"></a><FONT color="green">425</FONT> y2 = 0.0;<a name="line.425"></a><FONT color="green">426</FONT> }<a name="line.426"></a><FONT color="green">427</FONT> double transX2 = domainAxis.valueToJava2D(x2, dataArea, <a name="line.427"></a><FONT color="green">428</FONT> plot.getDomainAxisEdge());<a name="line.428"></a><FONT color="green">429</FONT> double transY2 = rangeAxis.valueToJava2D(y2, dataArea, <a name="line.429"></a><FONT color="green">430</FONT> plot.getRangeAxisEdge());<a name="line.430"></a><FONT color="green">431</FONT> <a name="line.431"></a><FONT color="green">432</FONT> double transZero = rangeAxis.valueToJava2D(0.0, dataArea, <a name="line.432"></a><FONT color="green">433</FONT> plot.getRangeAxisEdge());<a name="line.433"></a><FONT color="green">434</FONT> Polygon hotspot = null;<a name="line.434"></a><FONT color="green">435</FONT> if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {<a name="line.435"></a><FONT color="green">436</FONT> hotspot = new Polygon();<a name="line.436"></a><FONT color="green">437</FONT> hotspot.addPoint((int) transZero, <a name="line.437"></a><FONT color="green">438</FONT> (int) ((transX0 + transX1) / 2.0));<a name="line.438"></a><FONT color="green">439</FONT> hotspot.addPoint((int) ((transY0 + transY1) / 2.0), <a name="line.439"></a><FONT color="green">440</FONT> (int) ((transX0 + transX1) / 2.0));<a name="line.440"></a><FONT color="green">441</FONT> hotspot.addPoint((int) transY1, (int) transX1);<a name="line.441"></a><FONT color="green">442</FONT> hotspot.addPoint((int) ((transY1 + transY2) / 2.0), <a name="line.442"></a><FONT color="green">443</FONT> (int) ((transX1 + transX2) / 2.0));<a name="line.443"></a><FONT color="green">444</FONT> hotspot.addPoint((int) transZero, <a name="line.444"></a><FONT color="green">445</FONT> (int) ((transX1 + transX2) / 2.0));<a name="line.445"></a><FONT color="green">446</FONT> }<a name="line.446"></a><FONT color="green">447</FONT> else { // vertical orientation<a name="line.447"></a><FONT color="green">448</FONT> hotspot = new Polygon();<a name="line.448"></a><FONT color="green">449</FONT> hotspot.addPoint((int) ((transX0 + transX1) / 2.0), <a name="line.449"></a><FONT color="green">450</FONT> (int) transZero);<a name="line.450"></a><FONT color="green">451</FONT> hotspot.addPoint((int) ((transX0 + transX1) / 2.0), <a name="line.451"></a><FONT color="green">452</FONT> (int) ((transY0 + transY1) / 2.0));<a name="line.452"></a><FONT color="green">453</FONT> hotspot.addPoint((int) transX1, (int) transY1);<a name="line.453"></a><FONT color="green">454</FONT> hotspot.addPoint((int) ((transX1 + transX2) / 2.0), <a name="line.454"></a><FONT color="green">455</FONT> (int) ((transY1 + transY2) / 2.0));<a name="line.455"></a><FONT color="green">456</FONT> hotspot.addPoint((int) ((transX1 + transX2) / 2.0), <a name="line.456"></a><FONT color="green">457</FONT> (int) transZero);<a name="line.457"></a><FONT color="green">458</FONT> }<a name="line.458"></a><FONT color="green">459</FONT> <a name="line.459"></a><FONT color="green">460</FONT> if (item == 0) { // create a new area polygon for the series<a name="line.460"></a><FONT color="green">461</FONT> areaState.area = new Polygon();<a name="line.461"></a><FONT color="green">462</FONT> // the first point is (x, 0)<a name="line.462"></a><FONT color="green">463</FONT> double zero = rangeAxis.valueToJava2D(0.0, dataArea, <a name="line.463"></a><FONT color="green">464</FONT> plot.getRangeAxisEdge());<a name="line.464"></a><FONT color="green">465</FONT> if (plot.getOrientation() == PlotOrientation.VERTICAL) {<a name="line.465"></a><FONT color="green">466</FONT> areaState.area.addPoint((int) transX1, (int) zero);<a name="line.466"></a><FONT color="green">467</FONT> }<a name="line.467"></a><FONT color="green">468</FONT> else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {<a name="line.468"></a><FONT color="green">469</FONT> areaState.area.addPoint((int) zero, (int) transX1);<a name="line.469"></a><FONT color="green">470</FONT> }<a name="line.470"></a><FONT color="green">471</FONT> }<a name="line.471"></a><FONT color="green">472</FONT> <a name="line.472"></a><FONT color="green">473</FONT> // Add each point to Area (x, y)<a name="line.473"></a><FONT color="green">474</FONT> if (plot.getOrientation() == PlotOrientation.VERTICAL) {<a name="line.474"></a><FONT color="green">475</FONT> areaState.area.addPoint((int) transX1, (int) transY1);<a name="line.475"></a><FONT color="green">476</FONT> }<a name="line.476"></a><FONT color="green">477</FONT> else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {<a name="line.477"></a><FONT color="green">478</FONT> areaState.area.addPoint((int) transY1, (int) transX1);<a name="line.478"></a><FONT color="green">479</FONT> }<a name="line.479"></a><FONT color="green">480</FONT> <a name="line.480"></a><FONT color="green">481</FONT> PlotOrientation orientation = plot.getOrientation();<a name="line.481"></a><FONT color="green">482</FONT> Paint paint = getItemPaint(series, item);<a name="line.482"></a><FONT color="green">483</FONT> Stroke stroke = getItemStroke(series, item);<a name="line.483"></a><FONT color="green">484</FONT> g2.setPaint(paint);<a name="line.484"></a><FONT color="green">485</FONT> g2.setStroke(stroke);<a name="line.485"></a><FONT color="green">486</FONT> <a name="line.486"></a><FONT color="green">487</FONT> Shape shape = null;<a name="line.487"></a><FONT color="green">488</FONT> if (getPlotShapes()) {<a name="line.488"></a><FONT color="green">489</FONT> shape = getItemShape(series, item);<a name="line.489"></a><FONT color="green">490</FONT> if (orientation == PlotOrientation.VERTICAL) {<a name="line.490"></a><FONT color="green">491</FONT> shape = ShapeUtilities.createTranslatedShape(shape, transX1, <a name="line.491"></a><FONT color="green">492</FONT> transY1);<a name="line.492"></a><FONT color="green">493</FONT> }<a name="line.493"></a><FONT color="green">494</FONT> else if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.494"></a><FONT color="green">495</FONT> shape = ShapeUtilities.createTranslatedShape(shape, transY1, <a name="line.495"></a><FONT color="green">496</FONT> transX1);<a name="line.496"></a><FONT color="green">497</FONT> }<a name="line.497"></a><FONT color="green">498</FONT> g2.draw(shape);<a name="line.498"></a><FONT color="green">499</FONT> }<a name="line.499"></a><FONT color="green">500</FONT> <a name="line.500"></a><FONT color="green">501</FONT> if (getPlotLines()) {<a name="line.501"></a><FONT color="green">502</FONT> if (item > 0) {<a name="line.502"></a><FONT color="green">503</FONT> if (plot.getOrientation() == PlotOrientation.VERTICAL) {<a name="line.503"></a><FONT color="green">504</FONT> areaState.line.setLine(transX0, transY0, transX1, transY1);<a name="line.504"></a><FONT color="green">505</FONT> }<a name="line.505"></a><FONT color="green">506</FONT> else if (plot.getOrientation() == PlotOrientation.HORIZONTAL) {<a name="line.506"></a><FONT color="green">507</FONT> areaState.line.setLine(transY0, transX0, transY1, transX1);<a name="line.507"></a><FONT color="green">508</FONT> }<a name="line.508"></a><FONT color="green">509</FONT> g2.draw(areaState.line);<a name="line.509"></a><FONT color="green">510</FONT> }<a name="line.510"></a><FONT color="green">511</FONT> }<a name="line.511"></a><FONT color="green">512</FONT> <a name="line.512"></a><FONT color="green">513</FONT> // Check if the item is the last item for the series.<a name="line.513"></a><FONT color="green">514</FONT> // and number of items > 0. We can't draw an area for a single point.<a name="line.514"></a><FONT color="green">515</FONT> if (getPlotArea() && item > 0 && item == (itemCount - 1)) {<a name="line.515"></a><FONT color="green">516</FONT> <a name="line.516"></a><FONT color="green">517</FONT> if (orientation == PlotOrientation.VERTICAL) {<a name="line.517"></a><FONT color="green">518</FONT> // Add the last point (x,0)<a name="line.518"></a><FONT color="green">519</FONT> areaState.area.addPoint((int) transX1, (int) transZero);<a name="line.519"></a><FONT color="green">520</FONT> }<a name="line.520"></a><FONT color="green">521</FONT> else if (orientation == PlotOrientation.HORIZONTAL) {<a name="line.521"></a><FONT color="green">522</FONT> // Add the last point (x,0)<a name="line.522"></a>⌨️ 快捷键说明
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