java - Change JFreeChart Histogram colors dynamically? -

i'm trying show histogram of image , show colors. i've done jfreechart , createxylinechart , getting data iterating on pixels.

to speed i'm trying "createhistogram". i've followed this code.

to update chart new values i've used 2 methods:

xyplot plot = (xyplot) chart.getplot(); plot.setdataset(sethistogram(red, green, blue)); 

being sethistogram method returns histogramdataset depending on checkbox activated (boolean red, green , blue).

that works intended.

the second thing must when update colors of each series, otherwise default value. did following more or less same procedure values:

private void sethistogramcolors(boolean red, boolean green, boolean blue) {     xyplot plot = (xyplot) chart.getplot();     xybarrenderer renderer = (xybarrenderer) plot.getrenderer();     renderer.setbarpainter(new standardxybarpainter());     paint[] paintarray = null;     if (red) {         if (green) {             if (blue) {                 paintarray = new paint[3];                 paintarray[0] = new color(0x80ff0000, true);// translucent red, green & blue                 paintarray[1] = new color(0x8000ff00, true);                 paintarray[2] = new color(0x800000ff, true);             } else {                 paintarray = new paint[2];                 paintarray[0] = new color(0x80ff0000, true);                 paintarray[1] = new color(0x8000ff00, true);             }         } else {             paintarray = new paint[1];             paintarray[0] = new color(0x80ff0000, true);         }     } else if (green) {         if (blue) {             paintarray = new paint[2];             paintarray[0] = new color(0x8000ff00, true);             paintarray[1] = new color(0x800000ff, true);         } else {             paintarray = new paint[1];             paintarray[0] = new color(0x8000ff00, true);         }     } else if (blue){         paintarray = new paint[1];         paintarray[0] = new color(0x800000ff, true);     }     else {         return;     }     plot.setdrawingsupplier(new defaultdrawingsupplier(             paintarray,             defaultdrawingsupplier.default_fill_paint_sequence,             defaultdrawingsupplier.default_outline_paint_sequence,             defaultdrawingsupplier.default_stroke_sequence,             defaultdrawingsupplier.default_outline_stroke_sequence,             defaultdrawingsupplier.default_shape_sequence)); } 

but can see works when plot code first time, , next plots of different series take sames colors. here example, rgb color supposed be: [ when update red color goes green histogram , green's blue one:

is there anyway fix this?

based on fragment , comment, looks trying change display adding , removing series dataset in checkbox handlers. instead of altering model, change visibility of series in view. in case can give each checkbox suitable action, shown here , below. note in particular visibleaction uses series index matches corresponding color in custom drawingsupplier.

import java.awt.borderlayout; import java.awt.color; import java.awt.eventqueue; import java.awt.paint; import java.awt.event.actionevent; import java.awt.image.bufferedimage; import java.awt.image.raster; import java.io.ioexception; import java.net.url; import javax.imageio.imageio; import javax.swing.abstractaction; import javax.swing.imageicon; import javax.swing.jcheckbox; import javax.swing.jframe; import javax.swing.jlabel; import javax.swing.jpanel; import org.jfree.chart.chartfactory; import org.jfree.chart.chartpanel; import org.jfree.chart.jfreechart; import org.jfree.chart.plot.defaultdrawingsupplier; import org.jfree.chart.plot.plotorientation; import org.jfree.chart.plot.xyplot; import org.jfree.chart.renderer.xy.standardxybarpainter; import org.jfree.chart.renderer.xy.xybarrenderer; import org.jfree.data.statistics.histogramdataset;  /**  * @see https://stackoverflow.com/q/40537278/230513  * @see https://stackoverflow.com/q/11870416/230513  * @see https://stackoverflow.com/a/28519356/230513  */ public class histogram {      private static final int bins = 256;     private final bufferedimage image = getimage();     private histogramdataset dataset;     private xybarrenderer renderer;      private bufferedimage getimage() {         try {             return imageio.read(new url(                 "http://i.imgur.com/kxxhih1.jpg"));         } catch (ioexception e) {             e.printstacktrace(system.err);         }         return null;     }      private chartpanel createchartpanel() {         // dataset         dataset = new histogramdataset();         raster raster = image.getraster();         final int w = image.getwidth();         final int h = image.getheight();         double[] r = new double[w * h];         r = raster.getsamples(0, 0, w, h, 0, r);         dataset.addseries("red", r, bins);         r = raster.getsamples(0, 0, w, h, 1, r);         dataset.addseries("green", r, bins);         r = raster.getsamples(0, 0, w, h, 2, r);         dataset.addseries("blue", r, bins);         // chart         jfreechart chart = chartfactory.createhistogram("histogram", "value",             "count", dataset, plotorientation.vertical, true, true, false);         xyplot plot = (xyplot) chart.getplot();         renderer = (xybarrenderer) plot.getrenderer();         renderer.setbarpainter(new standardxybarpainter());         // translucent red, green & blue         paint[] paintarray = {             new color(0x80ff0000, true),             new color(0x8000ff00, true),             new color(0x800000ff, true)         };         plot.setdrawingsupplier(new defaultdrawingsupplier(             paintarray,             defaultdrawingsupplier.default_fill_paint_sequence,             defaultdrawingsupplier.default_outline_paint_sequence,             defaultdrawingsupplier.default_stroke_sequence,             defaultdrawingsupplier.default_outline_stroke_sequence,             defaultdrawingsupplier.default_shape_sequence));         chartpanel panel = new chartpanel(chart);         panel.setmousewheelenabled(true);         return panel;     }      private jpanel createcontrolpanel() {         jpanel panel = new jpanel();         panel.add(new jcheckbox(new visibleaction(0)));         panel.add(new jcheckbox(new visibleaction(1)));         panel.add(new jcheckbox(new visibleaction(2)));         return panel;     }      private class visibleaction extends abstractaction {          private final int i;          public visibleaction(int i) {             this.i = i;             this.putvalue(name, (string) dataset.getserieskey(i));             this.putvalue(selected_key, true);             renderer.setseriesvisible(i, true);         }          @override         public void actionperformed(actionevent e) {             renderer.setseriesvisible(i, !renderer.getseriesvisible(i));         }     }      private void display() {         jframe f = new jframe("histogram");         f.setdefaultcloseoperation(jframe.exit_on_close);         f.add(createchartpanel());         f.add(createcontrolpanel(), borderlayout.south);         f.add(new jlabel(new imageicon(image)), borderlayout.west);         f.pack();         f.setlocationrelativeto(null);         f.setvisible(true);     }      public static void main(string[] args) {         eventqueue.invokelater(() -> {             new histogram().display();         });     } }