studyrangedlabeltheme.java

CreateMyFirstMap

package myfirstmap;
import com.mapinfo.mapj.FeatureLayer;
import com.mapinfo.labeltheme.RangedLabelTheme;
import com.mapinfo.mapj.MapJ;
import com.mapinfo.unit.LinearUnit;
import com.mapinfo.util.DoublePoint;
import com.mapinfo.util.DoubleRect;
import com.mapinfo.mapj.Layers;
import com.mapinfo.labeltheme.LabelThemeList;
import com.mapinfo.dp.ColumnStatistics;
import java.util.List;
import com.mapinfo.dp.util.Bucketer;
import com.mapinfo.graphics.Rendition;
import com.mapinfo.graphics.RenditionImpl;
import java.awt.Color;
import com.mapinfo.dp.util.LinearRenditionSpreader;
import java.util.ArrayList;
import com.mapinfo.mapj.LabelProperties;
import com.mapinfo.xmlprot.mxtj.ImageRequestComposer;
import com.mapinfo.mapxtreme.client.MapXtremeImageRenderer;
import com.mapinfo.mapj.DataLayer;
import com.mapinfo.dp.Attribute;
public class StudyRangedLabelTheme
{
  private String mdfFilePath="e:\\MapInfo\\study\\mapmdf";
  private  String mdfFileName="states.mdf";
  private String mapxtremeURL="http://901-32:8083/mapxtreme47/mapxtreme";
  String TARGET_COLUMN_NAME = "POP_1990";
  int NUMBER_OF_BREAKPOINTS = 10;
  String TARGET_LAYER_NAME = "STATES";
  public StudyRangedLabelTheme()
  {
  }
public void studyRangedLabelTheme()
{
     MapJ mapj=new MapJ();
     double zoom = 10000.0;
     DataLayer dataLayer=null;
     DoublePoint centerPoint=new DoublePoint(-108.8,42.5);
     LinearUnit unit=LinearUnit.kilometer ;
     DoubleRect bound=new DoubleRect(0,0,800,600);
     Layers layers=null;
     FeatureLayer featureLayer=null;
     try
     {
       mapj.loadMapDefinition(mdfFilePath + "\\" + mdfFileName);
       mapj.setDistanceUnits(unit);
       layers = mapj.getLayers();
       dataLayer = (DataLayer) layers.get(0);
       DoubleRect rect = dataLayer.getBounds();
       double width = (rect.xmax - rect.xmin) / 4;
       double height = (rect.ymax - rect.ymin) / 4;
       mapj.setBounds(new DoubleRect(centerPoint, width, height));
       mapj.setDeviceBounds(bound);
     }catch(Exception e)
     {
       System.out.println("get a "+e.getClass() +"\nwith message "+e.getMessage() ) ;
     }
     //
     // obtain a reference to the target layer
     // name of the target layer whose labels' appearance will be altered by the RangedLabelTheme
    if ((featureLayer = (FeatureLayer)mapj.getLayers().getLayer(TARGET_LAYER_NAME)) != null)
    {//begin outer if
      // obtain the target layer's LabelThemeList, and add a new RangedLabelTheme theme to it
      LabelThemeList labelThemeList = null;
      if ((labelThemeList = featureLayer.getLabelThemeList()) != null)
      {//begin inner if
        /* generate a column statistics object for a specific column within our
         target table name of a column in the target layer's underlying table, which the created
          RangedLabelTheme will be based upon.
         */
       try {
         ColumnStatistics columnStatistics = featureLayer.fetchColumnStatistics( TARGET_COLUMN_NAME);
          //just study ColumnStatistics class
         /*int count=columnStatistics.getCount() ;
         Attribute attmax=         columnStatistics.getMax() ;
         double dmax=attmax.getDouble() ;
         Attribute attmin=         columnStatistics.getMin() ;
         double dmin=attmin.getDouble() ;
         double mean=         columnStatistics.getMean() ;
         double devi=    columnStatistics.getStandardDeviation() ;*/

         /*
          generate a List of breakpoints, such that each breakpoints
          represents a specific numeric range into which the records of our
          table will be logically grouped.
          */
         //number of breakpoint ranges to create for the RangedLabelTheme
         List breakPointSeries = (List) Bucketer.computeDistribution(NUMBER_OF_BREAKPOINTS,
             columnStatistics,  Bucketer.DISTRIBUTION_TYPE_EQUAL_COUNT);
         /*DISTRIBUTION_TYPE_EQUAL_COUNT:
          Has the same number of records in each range. If you want the Bucketer to group 100 records
           into 4 ranges using equal count, it computes the ranges so that approximately 25 records
           fall into each range, depending on the rounding factor you set.
          */
         /* create two(2) rendition objects that will act as the end-points
          for a range of renditions object that are to be created
          */
         /*int bpSize=breakPointSeries.size() ;
         for(int ii=0;ii<breakPointSeries.size() ;ii++)
         {//<=800000:8            <=1100000:2   <=1600000:6  <=2600000:5
          //  <=3500000:6          <=4000000:2    <=5100000:7  <=5500000:7
          // <=7700000:5            <=29800000:9
         ///  from this group I find this ranged group is not so good
            }
           Object obj=breakPointSeries.get(ii);
           String str=obj.toString() ;
           str="wait";
         }*/
         Rendition rendStart = new RenditionImpl();
         rendStart.setValue(Rendition.FONT_FAMILY, "Arial");
         rendStart.setValue(Rendition.FONT_WEIGHT, 1); // NOTE: 2 == bold
         rendStart.setValue(Rendition.FONT_SIZE, 12);
         rendStart.setValue(Rendition.SYMBOL_FOREGROUND, Color.red);
         Rendition rendEnd = new RenditionImpl();
         rendEnd.setValue(Rendition.FONT_FAMILY, "Arial");
         rendEnd.setValue(Rendition.FONT_WEIGHT, 2); // NOTE: 2 == bold
         rendEnd.setValue(Rendition.FONT_SIZE, 21);
         rendEnd.setValue(Rendition.SYMBOL_FOREGROUND, Color.blue);
         /* using the two(2) rendition objects, create a series of rendition
          objects that represent a gradation from the start rendition to the
          end rendition
          */
         List renditionSeries = (List) LinearRenditionSpreader.spread(NUMBER_OF_BREAKPOINTS,
             rendStart, rendEnd);
         int rendCount=renditionSeries.size() ;
         for(int jj=0;jj<renditionSeries.size() ;jj++)
         {
           Rendition rend=(Rendition)renditionSeries.get(jj) ;
           Object obj=rend.getValue(Rendition.FONT_SIZE ) ;
           String str=obj.toString() ;//12,13,14,15,16,17,18,19,20,21
           obj=rend.getValue(Rendition.FONT_FAMILY ) ;
           str=obj.toString() ;//Arial
           obj=rend.getValue(Rendition.FONT_WEIGHT ) ;
           str=obj.toString() ;//1,1,1,1,1,1,1,1,1,2:
           str="wait";
         }
         /* create an ArrayList of LabelProperties objects, such that each
          LabelProperties object within this vector is assigned a rendition
          object from our above created series of rendition objects
          */
         List labelPropertiesSeries = new ArrayList();
         LabelProperties labelProperties = null;
         for (int i = 0; i < NUMBER_OF_BREAKPOINTS; i++)
         {
           labelProperties = new LabelProperties();
           labelProperties.setRendition( (Rendition) renditionSeries.get(i));
           labelProperties.setLabelColumn(TARGET_COLUMN_NAME);
           labelPropertiesSeries.add(labelProperties);
         }
         /* create a new RangedLabelTheme object and add it to ourconcerned
              layer's LabelThemeList object. Create a simple description for the
                    RangedLabelTheme.
          */
         String THEME_DESCRIPTION_NAME = "test_for_ranged_label_theme";
         RangedLabelTheme rangedLabelTheme = new RangedLabelTheme(
             TARGET_COLUMN_NAME, // java.lang.String
             breakPointSeries, // java.util.List
             labelPropertiesSeries, // java.util.List
             THEME_DESCRIPTION_NAME // java.lang.String
             );
         labelThemeList.add(rangedLabelTheme);
         //
         featureLayer.setAutoLabel(true) ;
         ImageRequestComposer imageRC=ImageRequestComposer.create(mapj,256,Color.white ,"image/png");
         MapXtremeImageRenderer render=new MapXtremeImageRenderer(mapxtremeURL);
         render.render(imageRC) ;
         render.toFile("E:\\MapInfo\\study\\png\\rangedlabeltheme.png") ;
       }catch(Exception e)
       {
         System.out.println("get a "+e.getClass() +"\nwith message "+e.getMessage() ) ;
       }//end try
   }//end inner if

 }//end outer if
}//end function
}//end this class