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Re: [Chartsy-devel] Developing a new chart
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From: Alex L. <dj...@gm...> - 2010-11-17 10:56:34
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Hi Viorel
How do I:
1. Make sure that EMA and MACD packages are included in project libraries
(I've added them as non-api module dependencies in NetBeans. Is it enough?).
2. Make EMA and MACD public packages - How do I do that?
In addition, I've added your example code but NetBeans doesn't "see"
org.charty.macd and org.charty.ema as valid packages.
Thank you for your help.
On Wed, Nov 17, 2010 at 12:17 PM, Alex Lourie <dj...@gm...> wrote:
> Hi Viorel!
>
> Thank you so much for the help. I've tried to do this on my own and came up
> with something similar.
>
> I now only have 2 questions:
>
> 1. I think that the more correct code would be:
>
> if (emaDataset.getDataItem(i) != null && emaDataset.getDataItem(i-1) !=
> null
> && macdDataset.getDataItem(i) != null &&
> macdDataset.getDataItem(i-1) != null)
> {
> if (emaDataset.getCloseAt(i)
> > emaDataset.getCloseAt(i-1)
> && macdDataset.getCloseAt(i)
> > macdDataset.getCloseAt(i-1) )
> g.setColor(Color.GREEN);
> else if (emaDataset.getCloseAt(i)
> < emaDataset.getCloseAt(i-1)
> && macdDataset.getCloseAt(i)
> < macdDataset.getCloseAt(i-1))
> g.setColor(Color.RED);
> else
> g.setColor(Color.BLUE);
> }
>
> 2. Should it just compile? I had a problem at home with compiling this
> module for some reason...
>
>
> On Wed, Nov 17, 2010 at 11:24 AM, Viorel Gheba <vio...@gm...> wrote:
>
>> Hi Alex
>>
>> I tried to make a chart as you described.
>> This is the code that i used:
>>
>>
>> package org.chartsy.testmodule;
>>
>> import java.awt.Color;
>> import java.awt.Graphics2D;
>> import java.awt.Rectangle;
>> import org.chartsy.ema.EMA;
>> import org.chartsy.ema.OverlayProperties;
>> import org.chartsy.macd.IndicatorProperties;
>> import org.chartsy.macd.MACD;
>> import org.chartsy.main.ChartFrame;
>> import org.chartsy.main.ChartProperties;
>> import org.chartsy.main.chart.Chart;
>> import org.chartsy.main.data.ChartData;
>> import org.chartsy.main.data.Dataset;
>> import org.chartsy.main.utils.CoordCalc;
>> import org.chartsy.main.utils.Range;
>> import org.chartsy.main.utils.SerialVersion;
>> import org.chartsy.main.utils.StrokeGenerator;
>>
>> /**
>> *
>> * @author Viorel
>> */
>> public class TestChart extends Chart
>> {
>>
>> private static final long serialVersionUID = SerialVersion.APPVERSION;
>> private EMA ema;
>> private MACD macd;
>>
>> private Dataset mainDataset;
>>
>> public TestChart()
>> {
>> ema = new EMA();
>> OverlayProperties emaProps =
>> ema.getNode().getLookup().lookup(OverlayProperties.class);
>> emaProps.setPeriod(13);
>> macd = new MACD();
>> IndicatorProperties macdProps =
>> macd.getNode().getLookup().lookup(IndicatorProperties.class);
>> macdProps.setFast(12);
>> macdProps.setSlow(26);
>> macdProps.setSmooth(9);
>> }
>>
>> private void setDataset(Dataset dataset)
>> {
>> if (mainDataset == null)
>> {
>> mainDataset = dataset;
>> calculateDatasets();
>> }
>> else if (!mainDataset.equals(dataset))
>> {
>> mainDataset = dataset;
>> calculateDatasets();
>> }
>> }
>>
>> private void calculateDatasets()
>> {
>> ema.setDataset(mainDataset);
>> ema.calculate();
>> macd.setDataset(mainDataset);
>> macd.calculate();
>> }
>>
>> @Override public String getName()
>> {
>> return "Test Chart";
>> }
>>
>> @Override public void paint(Graphics2D g, ChartFrame cf)
>> {
>> setDataset(cf.getChartData().getDataset());
>>
>> ChartData cd = cf.getChartData();
>> ChartProperties cp = cf.getChartProperties();
>> Rectangle rect = cf.getSplitPanel().getChartPanel().getBounds();
>> rect.grow(-2, -2);
>> Range range = cf.getSplitPanel().getChartPanel().getRange();
>>
>> Dataset dataset = cd.getVisible();
>> Dataset emaDataset = ema.visibleDataset(cf, EMA.EMA);
>> Dataset macdDataset = macd.visibleDataset(cf, MACD.HISTOGRAM);
>>
>> if (dataset != null && emaDataset != null && macdDataset != null)
>> {
>> g.setStroke(StrokeGenerator.getStroke(3));
>>
>> int count = emaDataset.getItemsCount();
>> for (int i = 0; i < count; i++)
>> {
>> double open = dataset.getOpenAt(i);
>> double close = dataset.getCloseAt(i);
>> double high = dataset.getHighAt(i);
>> double low = dataset.getLowAt(i);
>>
>> double x = cd.getX(i, rect);
>> double yOpen = cd.getY(open, rect, range);
>> double yClose = cd.getY(close, rect, range);
>> double yHigh = cd.getY(high, rect, range);
>> double yLow = cd.getY(low, rect, range);
>>
>> double candleWidth = cp.getBarWidth();
>>
>> if (emaDataset.getDataItem(i) != null
>> && macdDataset.getDataItem(i) != null)
>> {
>> if (emaDataset.getCloseAt(i) > close &&
>> macdDataset.getCloseAt(i) > 0)
>> g.setColor(Color.GREEN);
>> else if (emaDataset.getCloseAt(i) < close &&
>> macdDataset.getCloseAt(i) < 0)
>> g.setColor(Color.RED);
>> else
>> g.setColor(Color.BLUE);
>> }
>> else
>> {
>> g.setColor(Color.BLUE);
>> }
>>
>> g.draw(CoordCalc.line(x, yLow, x, yHigh));
>> g.draw(CoordCalc.line(x, yOpen, x - candleWidth/2,
>> yOpen));
>> g.draw(CoordCalc.line(x, yClose, x + candleWidth/2,
>> yClose));
>> }
>> }
>> }
>>
>> }
>>
>> You ca see that I copied the OHLC code.
>> Note:
>> - Make sure that EMA and MACD packages are included in your project
>> libraries.
>> - Make EMA and MACD public packages.
>>
>> For more questions, please contact us.
>> Best regards,
>> Viorel
>>
>>
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>>
>
>
> --
> Alex Lourie
>
--
Alex Lourie
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