Re: [Chartsy-devel] Chartsy-devel Digest, Vol 8, Issue 3

[Viorel G. <vio...@gm...>]

On 17.11.2010 12:17, cha...@li... wrote:
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> Today's Topics:
>
>     1. Developing a new chart (Viorel Gheba)
>     2. Re: Developing a new chart (Alex Lourie)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Wed, 17 Nov 2010 11:24:09 +0200
> From: Viorel Gheba<vio...@gm...>
> Subject: [Chartsy-devel] Developing a new chart
> To: cha...@li...
> Message-ID:<4CE...@gm...>
> Content-Type: text/plain; charset="iso-8859-1"
>
> 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
> -------------- next part --------------
> An HTML attachment was scrubbed...
>
> ------------------------------
>
> Message: 2
> Date: Wed, 17 Nov 2010 12:17:07 +0200
> From: Alex Lourie<dj...@gm...>
> Subject: Re: [Chartsy-devel] Developing a new chart
> To: cha...@li...
> Message-ID:
> 	<AAN...@ma...>
> Content-Type: text/plain; charset="iso-8859-1"
>
> 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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>> Cha...@li...
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>>
>>
>
Hi Alex,

1. My code was an example :). Make the changes that you need to 
implement the new chart.
2. Can you please send me the error text?

Best regards,
Viorel