MAPX development target Trajectory display core code (VC + +)

One, the affirmation variableCMAPX m_ctrlmapx;            Cmapxlayer M_objlayer;          Moving target layer Cmapxlayer m_tracelayer;   The target trajectory layer cmapxlayer m_scalebarlayer;  Scale layer Cmapxfeature m_objft;       Double M_lfcenterlon;         Map center longitude double M_lfcenterlat; Map Center latitude Cmapxfeature M_objtrackft[maxnuminemap]; Second, create a map controlCRect RC;  GetClientRect (&AMP;RC); M_ctrlmapx. Create(Null,ws_visible, RC, this, idc_map);  M_ctrlmapx.setcurrenttool (Mipantool); Char Geoname[max_path]; GetCurrentDirectory (Max_path,geoname); strcat (Geoname, "/map/asia.gst"); String 3 m_ctrlmapx. Setgeoset(geoname);//Set map name M_ctrlmapx.settitletext (""); M_ctrlmapx. Setmapunit(miunitkilometer)//Set map unit M_ctrlmapx.setpaperunit (mipaperunitkilometer); M_scalebarlayer = M_ctrlmapx.getlayers (). Adduserdrawlayer("scale", 1);//Add User display layer M_ctrlmapx.setautoredraw (TRUE); Third, create the target trajectory layer  m_objlayer = M_ctrlmapx.getlayers (). Createlayer ("Goal", NULL, 1, 32);  m_ctrlmapx.getlayers (). Setanimationlayer (M_objlayer);/set the layer to animation layer  m_objlayer.setselectable (FALSE);//Set this layer target is not selectable  m_ Objlayer.setautolabel (TRUE);/set this layer target to automatically callout  m_objlayer.getlabel (). Setlinetype (Milinetypenone);//Set Callout linear  m_objlayer.getlabel (). SetPosition (MIPOSITIONTR);//Set Callout position  m_objlayer.getlabel (). SetOffset (2);/Set callout offset  m_objlayer.setoverridestyle (TRUE);//All Feature in this layer use the same style,*** key point, when using different style, the parameter is false*** string 1  m_objlayer.getlabel (). GetStyle (). Settextfontcolor (micolorred);//Set Callout color  m_objlayer.getlabel (). Setoverlap (TRUE);//allow annotations to overwrite  m_objlayer.getstyle (). Getsymbolfont (). SetName ("Mapinfo symbols");//Set the font  m_objlayer.getstyle () used by the symbol feature. Setsymbolcharacter (53);//Set the character  m_objlayer.getstyle () used by the symbol feature. Setsymbolfontcolor (RGB (255,0,0));//Set the color  m_objlayer.getstyle () used by the symbol feature. Setlinewidth (1)//Set line width of linear feature  m_objLayer.setdrawlabelsafter (TRUE);//Draw callout After all layers have been drawn Iv. Creating the target trajectory layerM_tracelayer = M_ctrlmapx.getlayers ().  Createlayer ("Trajectory", NULL, 2, 32); M_ctrlmapx.getlayers ().  Setanimationlayer (M_tracelayer);  M_tracelayer.setselectable (FALSE); M_tracelayer.setdrawlabelsafter (TRUE);//affects key to annotation refresh v. Response Ondrawuserlayer Draw scale layer Six, change the target position in the timer Vii. refreshing electronic maps  m_objlayer.beginaccess (miaccessreadwrite);//significantly reduce CPU overhead  m_tracelayer.beginaccess (miAccessReadWrite); /significantly reduce CPU overhead  for (int i=0;i<maxnuminemap; i++)  { //Set Target location   sobjectinemap[i].ft. GetPoint (). Set (sgispoint[i][0].x, SGISPOINT[I][0].Y);   sobjectinemap[i].ft. Update ();      //Set Target trajectory  //empty time to create target trajectory object   if (m_objtrackft[i]==null)   {   Cmapxfeatur e ft;    ft. CreateDispatch (ft.) Getclsid ());    ft. Attach (M_ctrlmapx.getdispatch (FALSE));    ft. SetType (Mifeaturetypeline);    ft. GetStyle (). Setlinecolor (colors[i%12]);    ft. GetStyle (). Setlinestyle (1);//77-rails (reference help)    ft. GetStyle (). Setlinewidth (2);    cmapxpoints pts;    pts. CreateDispatch (pts. Getclsid ());   //Add coordinate Data    pts. ADDXY (sgispoint[i][1].x, SGISPOINT[I][1].Y);    pts. ADDXY (sgispoint[i][0].x, SGISPOINT[I][0].Y);    ft. GetParts (). Add(pts);   //Add to target layer    m_objtrackft[i] = m_tracelayer.addfeature ((lpdispatch) ft); String 6  }   else   {  //Update target trajectory object    m_objtrackft[i]. GetParts (). Item (1). ADDXY (sgispoint[i][0].x, SGISPOINT[I][0].Y);    M_objtrackft[i]. Update ();  }   Sgispoint[i][1] = sgispoint[i][0];  }  m_tracelayer.endaccess ();  m_objlayer.endaccess ();