标签专题图的问题

如果要使用tl.items，必须设置tl.rangeExpression。

参考代码：

ThemeLabel tl = new ThemeLabel();
   tl.labelExpression = "Country";
   tl.rangeExpression = "SmID";
   tl.items = new ThemeLabelItem[2];
   tl.items[0] = new ThemeLabelItem();
   tl.items[0].start = 1;
   tl.items[0].end = 147;
   tl.items[0].style = new TextStyle();
   tl.items[0].style.bold = true;
   tl.items[0].style.italic = true;
   tl.items[0].style.color = Color.sysColorToServicesColor(java.awt.Color.RED);
   tl.items[0].visible = true;
   tl.items[0].caption = "caption0";
   
   tl.items[1] = new ThemeLabelItem();
   tl.items[1].start = 147;
   tl.items[1].end = 247;
   tl.items[1].style = new TextStyle();
   tl.items[1].style.bold = true;
   tl.items[1].style.italic = true;
   tl.items[1].style.color = Color.sysColorToServicesColor(java.awt.Color.YELLOW);
   tl.items[1].visible = true;
   tl.items[1].caption = "caption1";