MapXtreme2005中关于使用动画图层的一个方法

 关于使用动画图层的一个方法

 首先是要对图层进行初始化，初始出来新的一个图层中的两个图元。

 private void btnInitializeObjects_Click(object sender, System.EventArgs e)

 {

  Catalog Cat = MapInfo.Engine.Session.Current.Catalog;

  //Create Temp layer

  TableInfoMemTable tblInfoTemp = new TableInfoMemTable("Animation");

  Table tblTemp = Cat.GetTable("Animation");

  if (tblTemp != null) //Table exists close it

   Cat.CloseTable("Animation");

  

  tblInfoTemp.Columns.Add(ColumnFactory.CreateFeatureGeometryColumn(mapControl1.Map.GetDisplayCoordSys()));

  tblInfoTemp.Columns.Add(ColumnFactory.CreateStyleColumn());

  tblInfoTemp.Columns.Add(ColumnFactory.CreateStringColumn("Name", 40));

  tblInfoTemp.Columns.Add(ColumnFactory.CreateStringColumn("Dept", 15));

  tblInfoTemp.Columns.Add(ColumnFactory.CreateIntColumn("Level"));

  tblTemp = Cat.CreateTable(tblInfoTemp);

  FeatureLayer lyr = new FeatureLayer(tblTemp);

  mapControl1.Map.Layers.Add(lyr);

  //Create Points

  FeatureGeometry pt = new MapInfo.Geometry.Point(lyr.CoordSys, new DPoint(130, 42)) as FeatureGeometry;

  CompositeStyle cs = new CompositeStyle(new SimpleVectorPointStyle(37, System.Drawing.Color.Red, 10));

  Feature ftr = new Feature(tblTemp.TableInfo.Columns);

  ftr.Geometry = pt;

  ftr.Style = cs;

  ftr["Name"] = "Kelly";

  ftr["Dept"] = "Sales";

  ftr["Level"] = 3;

  tblTemp.InsertFeature(ftr);

  FeatureGeometry pt2 = new MapInfo.Geometry.Point(lyr.CoordSys, new DPoint(122, 45)) as FeatureGeometry;

  CompositeStyle cs2 = new CompositeStyle(new SimpleVectorPointStyle(44, System.Drawing.Color.Purple, 10));

  Feature ftr2 = new Feature(tblTemp.TableInfo.Columns);

  ftr2.Geometry = pt2;

  ftr2.Style = cs2;

  ftr2["Name"] = "Greg";

  ftr2["Dept"] = "Marketing";

  ftr2["Level"] = 2;

  tblTemp.InsertFeature(ftr2);

 }

 在Timer事件中进行对图元的移动。

 private void timer1_Tick(object sender, System.EventArgs e)

 {

  Catalog  cat = MapInfo.Engine.Session.Current.Catalog;

  Table tbl = cat.GetTable("Animation");

  if (tbl != null) 

  {

   //Update the position of the points

   SearchInfo  si = MapInfo.Data.SearchInfoFactory.SearchWhere("Name = 'Kelly'");

   Feature ftr = cat.SearchForFeature(tbl, si);

   SearchInfo si2 = MapInfo.Data.SearchInfoFactory.SearchWhere("Name = 'Greg'");

   Feature ftr2 = cat.SearchForFeature(tbl, si2);

   if (DateTime.Now.TimeOfDay.Seconds % 4 == 0)

   {

    ftr.Geometry.GeometryEditor.OffsetByXY(-5, -25, DistanceUnit.Mile, DistanceType.Spherical);

    ftr2.Geometry.GeometryEditor.OffsetByXY(0, 25, DistanceUnit.Mile, DistanceType.Spherical);

   }

   else

   {

    ftr.Geometry.GeometryEditor.OffsetByXY(-10, 0, DistanceUnit.Mile, DistanceType.Spherical);

    ftr2.Geometry.GeometryEditor.OffsetByXY(10, 5, DistanceUnit.Mile, DistanceType.Spherical);

   }

     

   ftr.Geometry.EditingComplete();

   ftr2.Geometry.EditingComplete();

   ftr.Update();

   ftr2.Update();

  }

 }