📄 fastscatterplot.html
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<FONT color="green">436</FONT> <a name="line.436"></a><FONT color="green">437</FONT> // set up info collection...<a name="line.437"></a><FONT color="green">438</FONT> if (info != null) {<a name="line.438"></a><FONT color="green">439</FONT> info.setPlotArea(area);<a name="line.439"></a><FONT color="green">440</FONT> }<a name="line.440"></a><FONT color="green">441</FONT> <a name="line.441"></a><FONT color="green">442</FONT> // adjust the drawing area for plot insets (if any)...<a name="line.442"></a><FONT color="green">443</FONT> RectangleInsets insets = getInsets();<a name="line.443"></a><FONT color="green">444</FONT> insets.trim(area);<a name="line.444"></a><FONT color="green">445</FONT> <a name="line.445"></a><FONT color="green">446</FONT> AxisSpace space = new AxisSpace();<a name="line.446"></a><FONT color="green">447</FONT> space = this.domainAxis.reserveSpace(<a name="line.447"></a><FONT color="green">448</FONT> g2, this, area, RectangleEdge.BOTTOM, space<a name="line.448"></a><FONT color="green">449</FONT> );<a name="line.449"></a><FONT color="green">450</FONT> space = this.rangeAxis.reserveSpace(<a name="line.450"></a><FONT color="green">451</FONT> g2, this, area, RectangleEdge.LEFT, space<a name="line.451"></a><FONT color="green">452</FONT> );<a name="line.452"></a><FONT color="green">453</FONT> Rectangle2D dataArea = space.shrink(area, null);<a name="line.453"></a><FONT color="green">454</FONT> <a name="line.454"></a><FONT color="green">455</FONT> if (info != null) {<a name="line.455"></a><FONT color="green">456</FONT> info.setDataArea(dataArea);<a name="line.456"></a><FONT color="green">457</FONT> }<a name="line.457"></a><FONT color="green">458</FONT> <a name="line.458"></a><FONT color="green">459</FONT> // draw the plot background and axes...<a name="line.459"></a><FONT color="green">460</FONT> drawBackground(g2, dataArea);<a name="line.460"></a><FONT color="green">461</FONT> <a name="line.461"></a><FONT color="green">462</FONT> AxisState domainAxisState = null;<a name="line.462"></a><FONT color="green">463</FONT> AxisState rangeAxisState = null;<a name="line.463"></a><FONT color="green">464</FONT> if (this.domainAxis != null) {<a name="line.464"></a><FONT color="green">465</FONT> domainAxisState = this.domainAxis.draw(<a name="line.465"></a><FONT color="green">466</FONT> g2, dataArea.getMaxY(), area, dataArea, <a name="line.466"></a><FONT color="green">467</FONT> RectangleEdge.BOTTOM, info<a name="line.467"></a><FONT color="green">468</FONT> );<a name="line.468"></a><FONT color="green">469</FONT> }<a name="line.469"></a><FONT color="green">470</FONT> if (this.rangeAxis != null) {<a name="line.470"></a><FONT color="green">471</FONT> rangeAxisState = this.rangeAxis.draw(<a name="line.471"></a><FONT color="green">472</FONT> g2, dataArea.getMinX(), area, dataArea, <a name="line.472"></a><FONT color="green">473</FONT> RectangleEdge.LEFT, info<a name="line.473"></a><FONT color="green">474</FONT> );<a name="line.474"></a><FONT color="green">475</FONT> }<a name="line.475"></a><FONT color="green">476</FONT> drawDomainGridlines(g2, dataArea, domainAxisState.getTicks());<a name="line.476"></a><FONT color="green">477</FONT> drawRangeGridlines(g2, dataArea, rangeAxisState.getTicks());<a name="line.477"></a><FONT color="green">478</FONT> <a name="line.478"></a><FONT color="green">479</FONT> Shape originalClip = g2.getClip();<a name="line.479"></a><FONT color="green">480</FONT> Composite originalComposite = g2.getComposite();<a name="line.480"></a><FONT color="green">481</FONT> <a name="line.481"></a><FONT color="green">482</FONT> g2.clip(dataArea);<a name="line.482"></a><FONT color="green">483</FONT> g2.setComposite(<a name="line.483"></a><FONT color="green">484</FONT> AlphaComposite.getInstance(<a name="line.484"></a><FONT color="green">485</FONT> AlphaComposite.SRC_OVER, getForegroundAlpha()<a name="line.485"></a><FONT color="green">486</FONT> )<a name="line.486"></a><FONT color="green">487</FONT> );<a name="line.487"></a><FONT color="green">488</FONT> <a name="line.488"></a><FONT color="green">489</FONT> render(g2, dataArea, info, null);<a name="line.489"></a><FONT color="green">490</FONT> <a name="line.490"></a><FONT color="green">491</FONT> g2.setClip(originalClip);<a name="line.491"></a><FONT color="green">492</FONT> g2.setComposite(originalComposite);<a name="line.492"></a><FONT color="green">493</FONT> drawOutline(g2, dataArea);<a name="line.493"></a><FONT color="green">494</FONT> <a name="line.494"></a><FONT color="green">495</FONT> }<a name="line.495"></a><FONT color="green">496</FONT> <a name="line.496"></a><FONT color="green">497</FONT> /**<a name="line.497"></a><FONT color="green">498</FONT> * Draws a representation of the data within the dataArea region. The <a name="line.498"></a><FONT color="green">499</FONT> * <code>info</code> and <code>crosshairState</code> arguments may be <a name="line.499"></a><FONT color="green">500</FONT> * <code>null</code>.<a name="line.500"></a><FONT color="green">501</FONT> *<a name="line.501"></a><FONT color="green">502</FONT> * @param g2 the graphics device.<a name="line.502"></a><FONT color="green">503</FONT> * @param dataArea the region in which the data is to be drawn.<a name="line.503"></a><FONT color="green">504</FONT> * @param info an optional object for collection dimension information.<a name="line.504"></a><FONT color="green">505</FONT> * @param crosshairState collects crosshair information (<code>null</code><a name="line.505"></a><FONT color="green">506</FONT> * permitted).<a name="line.506"></a><FONT color="green">507</FONT> */<a name="line.507"></a><FONT color="green">508</FONT> public void render(Graphics2D g2, Rectangle2D dataArea,<a name="line.508"></a><FONT color="green">509</FONT> PlotRenderingInfo info, CrosshairState crosshairState) {<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> //long start = System.currentTimeMillis();<a name="line.512"></a><FONT color="green">513</FONT> //System.out.println("Start: " + start);<a name="line.513"></a><FONT color="green">514</FONT> g2.setPaint(this.paint);<a name="line.514"></a><FONT color="green">515</FONT> <a name="line.515"></a><FONT color="green">516</FONT> // if the axes use a linear scale, you can uncomment the code below and<a name="line.516"></a><FONT color="green">517</FONT> // switch to the alternative transX/transY calculation inside the loop <a name="line.517"></a><FONT color="green">518</FONT> // that follows - it is a little bit faster then.<a name="line.518"></a><FONT color="green">519</FONT> // <a name="line.519"></a><FONT color="green">520</FONT> // int xx = (int) dataArea.getMinX();<a name="line.520"></a><FONT color="green">521</FONT> // int ww = (int) dataArea.getWidth();<a name="line.521"></a><FONT color="green">522</FONT> // int yy = (int) dataArea.getMaxY();<a name="line.522"></a><FONT color="green">523</FONT> // int hh = (int) dataArea.getHeight();<a name="line.523"></a><FONT color="green">524</FONT> // double domainMin = this.domainAxis.getLowerBound();<a name="line.524"></a><FONT color="green">525</FONT> // double domainLength = this.domainAxis.getUpperBound() - domainMin;<a name="line.525"></a><FONT color="green">526</FONT> // double rangeMin = this.rangeAxis.getLowerBound();<a name="line.526"></a><FONT color="green">527</FONT> // double rangeLength = this.rangeAxis.getUpperBound() - rangeMin;<a name="line.527"></a><FONT color="green">528</FONT> <a name="line.528"></a><FONT color="green">529</FONT> if (this.data != null) {<a name="line.529"></a><FONT color="green">530</FONT> for (int i = 0; i < this.data[0].length; i++) {<a name="line.530"></a><FONT color="green">531</FONT> float x = this.data[0][i];<a name="line.531"></a><FONT color="green">532</FONT> float y = this.data[1][i];<a name="line.532"></a><FONT color="green">533</FONT> <a name="line.533"></a><FONT color="green">534</FONT> //int transX = (int) (xx + ww * (x - domainMin) / domainLength);<a name="line.534"></a><FONT color="green">535</FONT> //int transY = (int) (yy - hh * (y - rangeMin) / rangeLength); <a name="line.535"></a><FONT color="green">536</FONT> int transX = (int) this.domainAxis.valueToJava2D(<a name="line.536"></a><FONT color="green">537</FONT> x, dataArea, RectangleEdge.BOTTOM<a name="line.537"></a><FONT color="green">538</FONT> );<a name="line.538"></a><FONT color="green">539</FONT> int transY = (int) this.rangeAxis.valueToJava2D(<a name="line.539"></a><FONT color="green">540</FONT> y, dataArea, RectangleEdge.LEFT<a name="line.540"></a><FONT color="green">541</FONT> );<a name="line.541"></a><FONT color="green">542</FONT> g2.fillRect(transX, transY, 1, 1);<a name="line.542"></a><FONT color="green">543</FONT> }<a name="line.543"></a><FONT color="green">544</FONT> }<a name="line.544"></a><FONT color="green">545</FONT> //long finish = System.currentTimeMillis();<a name="line.545"></a><FONT color="green">546</FONT> //System.out.println("Finish: " + finish);<a name="line.546"></a><FONT color="green">547</FONT> //System.out.println("Time: " + (finish - start));<a name="line.547"></a><FONT color="green">548</FONT> <a name="line.548"></a><FONT color="green">549</FONT> }<a name="line.549"></a><FONT color="green">550</FONT> <a name="line.550"></a><FONT color="green">551</FONT> /**<a name="line.551"></a><FONT color="green">552</FONT> * Draws the gridlines for the plot, if they are visible.<a name="line.552"></a><FONT color="green">553</FONT> *<a name="line.553"></a><FONT color="green">554</FONT> * @param g2 the graphics device.<a name="line.554"></a><FONT color="green">555</FONT> * @param dataArea the data area.<a name="line.555"></a><FONT color="green">556</FONT> * @param ticks the ticks.<a name="line.556"></a><FONT color="green">557</FONT> */<a name="line.557"></a><FONT color="green">558</FONT> protected void drawDomainGridlines(Graphics2D g2, Rectangle2D dataArea, <a name="line.558"></a><FONT color="green">559</FONT> List ticks) {<a name="line.559"></a><FONT color="green">560</FONT> <a name="line.560"></a><FONT color="green">561</FONT> // draw the domain grid lines, if any...<a name="line.561"></a><FONT color="green">562</FONT> if (isDomainGridlinesVisible()) {<a name="line.562"></a><FONT color="green">563</FONT> Stroke gridStroke = getDomainGridlineStroke();<a name="line.563"></a><FONT color="green">564</FONT> Paint gridPaint = getDomainGridlinePaint();<a name="line.564"></a><FONT color="green">565</FONT> if ((gridStroke != null) && (gridPaint != null)) {<a name="line.565"></a><FONT color="green">566</FONT> Iterator iterator = ticks.iterator();<a name="line.566"></a><FONT color="green">567</FONT> while (iterator.hasNext()) {<a name="line.567"></a><FONT color="green">568</FONT> ValueTick tick = (ValueTick) iterator.next();<a name="line.568"></a><FONT color="green">569</FONT> double v = this.domainAxis.valueToJava2D(<a name="line.569"></a><FONT color="green">570</FONT> tick.getValue(), dataArea, RectangleEdge.BOTTOM<a name="line.570"></a><FONT color="green">571</FONT> );<a name="line.571"></a><FONT color="green">572</FONT> Line2D line = new Line2D.Double(<a name="line.572"></a><FONT color="green">573</FONT> v, dataArea.getMinY(), v, dataArea.getMaxY()<a name="line.573"></a><FONT color="green">574</FONT> );<a name="line.574"></a><FONT color="green">575</FONT> g2.setPaint(gridPaint);<a name="line.575"></a><FONT color="green">576</FONT> g2.setStroke(gridStroke);<a name="line.576"></a><FONT color="green">577</FONT> g2.draw(line); <a name="line.577"></a><FONT color="green">578</FONT> }<a name="line.578"></a><FONT color="green">579</FONT> }<a name="line.579"></a><FONT color="green">580</FONT> }<a name="line.580"></a><FONT color="green">581</FONT> }<a name="line.581"></a>⌨️ 快捷键说明
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