使用setCellStyleGenerator时,表propertyId值为null

时间:2011-05-31 19:17:28

标签: css vaadin cell

我是Vaadin的新手,但确实有一些Java Swing经验。

我正在尝试使用table.setCellStyleGenerator来设置标题为“Name”的特定单元格的颜色。

我正在使用vaadin书中的一个例子:

Table table = new Table("Table with Cell Styles");
    table.addStyleName("checkerboard");

    table.addContainerProperty("0",String.class,null,"Name", null,  null);
    table.addContainerProperty("1",String.class,null,"Surname", null,  null);
    table.addContainerProperty("2",Date.class,null,"Date.", null,  null);
    table.addContainerProperty("3",Integer.class,null,"Required.", null,  null);
    table.addContainerProperty("4",Integer.class,null,"Complete", null,  null);


    table.addContainerProperty("5",String.class,null,"Cakes", null,  null);
    table.addContainerProperty("6",Integer.class,null,"Cake Quantity", null,  null);
    table.addContainerProperty("7",String.class,null,"Status", null,  null);
    table.addContainerProperty("8",TextField.class,null,"Notes", null,  null);

我填写了表格如下:

/* Add a few items in the table. */
    table.addItem(new Object[] {
        "Nicolaus","Copernicus",new Date("21/05/2011"), new Integer(1473), new Integer(1), "Cake",  new Integer(1473), "cakestatus", commentsField }, new Integer(3)); 

我可以与我的样式表进行通信,但是当我尝试以下内容时:

table.setCellStyleGenerator(new Table.CellStyleGenerator() {
        public String getStyle(Object itemId, Object propertyId) {
            int row = ((Integer)itemId).intValue();
          int col = Integer.parseInt((String)propertyId);


         System.out.println("COL:"+ col);  
            // The first column.
          if (col == 0)
             return "rowheader";
                                  .... 

[b] PropertyId [/ b]显示为null。

并且Tomcat发出以下信息:

  

严重:终端错误:
  java.lang.NumberFormatException:null
      在java.lang.Integer.parseInt(未知来源)

我很确定我正在制作一些初学者错误。

顺便说一下,我的styles.css访问如下:

mainWindow.setTheme("colouredCells");

/* Create the table with a caption. */
Table table = new Table("Table with Cell Styles");
table.addStyleName("checkerboard"); 

并且CSS包含以下内容:

@import url(../colouredCells/styles.css);
/* Using the old default theme (runo) as the basis for now */





/* Center the text in header. */
.v-table-header-cell {
    text-align: center;
}

/* Basic style for all cells. */
.v-table-checkerboard .v-table-cell-content {
    text-align: center;
    vertical-align: middle;
    padding-top: 12px;
    width: 20px;
    height: 28px;
}

/* Style specifically for the row header cells. */
.v-table-cell-content-rowheader {
    background: #E7EDF3
     url(../default/table/img/header-bg.png) repeat-x scroll 0 0;
}

/* Style specifically for the "white" cells. */
.v-table-cell-content-white {
    background: white;
    color: black;
}

/* Style specifically for the "black" cells. */
.v-table-cell-content-black {
    background: #60497b;
    color: white;
}

1 个答案:

答案 0 :(得分:1)

null属性Id的原因在CellStyleGenerator的javadoc中进行了解释:还调用单元格样式生成器以选择性地为每一行设置样式,在该场景中,propertyId为null。如果propertyId为null,您可能只想返回null。