更改节点样式

在我的项目中，我使用gwt 2.5.1和gxt 3.0.1。我创建树。更改节点样式

protected void createTree(TreeStore<ProjectExtended> treeStore) { 

    ValueProvider<ProjectExtended, SafeHtml> provider = new ValueProvider<ProjectExtended, SafeHtml>() { 

     @Override 
     public void setValue(ProjectExtended object, SafeHtml value) { 

     } 

     @Override 
     public SafeHtml getValue(ProjectExtended object) { 

      if(object == null) return SafeHtmlUtils.EMPTY_SAFE_HTML; 

      if (!object.getActive()) { 
       return SafeHtmlUtils.fromTrustedString(
         "<span class=\"projectNotActive\">" + object.getName() + 
         "</span> " + "<span class=\"dictIdText\"> (" + 
         object.getId() + "/" + object.getParentId() + ") </span>"); 
      } else { 
       return SafeHtmlUtils.fromTrustedString(
         object.getName() + "<span class=\"dictIdText\"> (" + 
         object.getId() + "/" + object.getParentId() + ") </span>"); 
      } 
     } 

     @Override 
     public String getPath() { 
      return "name"; 
     } 
    }; 

    Tree<ProjectExtended, SafeHtml> tree = new Tree<ProjectExtended, SafeHtml>(treeStore, provider); 
    tree.getSelectionModel().setSelectionMode(SelectionMode.SINGLE); 

    add(tree); 
}

我尝试改变未激活的节点的样式。但我无法解决这个问题，因为浏览器显示它们错了！

http://i.stack.imgur.com/0Jmdq.png

是有没有办法解决此问题的方法？

来源

2013-10-29 De3MoHD

我解决了这个问题。帮助的文章是here。

有一个简单的代码示例。

您应该创建一个继承的类AbstractCell和重写Render方法：

public class SimpleAbstractCell extends AbstractCell<String> { 

    @Override 
    public void render(Context context, String value, SafeHtmlBuilder sb) { 
     /* 
     * Always do a null check on the value. Cell widgets can pass null to 
     * cells if the underlying data contains a null, or if the data arrives 
     * out of order. 
     */ 
     if (value == null) { 
      return; 
     } 

     SafeHtml safeValue = SafeHtmlUtils.fromTrustedString(value); 
     sb.append(safeValue); 
    } 
}

在创建过程中一棵树，你应该申报contentCell：

protected void createTree(TreeStore<ProjectExtended> treeStore) { 

    ValueProvider<ProjectExtended, String> provider = new ValueProvider<ProjectExtended, String>() { 

     @Override 
     public void setValue(ProjectExtended object, String value) { 

     } 

     @Override 
     public String getValue(ProjectExtended object) { 

      if(object == null) return ""; 

      if (!object.getActive()) { 
       return 
        "<span class=\"projectNotActive\">" + object.getName() + 
        "</span> " + "<span class=\"dictIdText\"> (" + 
        object.getId() + "/" + object.getParentId() + ") </span>"; 
      } else { 
       return 
        object.getName() + "<span class=\"dictIdText\"> (" + 
        object.getId() + "/" + object.getParentId() + ") </span>"; 
      } 
     } 

     @Override 
     public String getPath() { 
      return "name"; 
     } 
    }; 

    Tree<ProjectExtended, String> tree = new Tree<ProjectExtended, String>(treeStore, provider); 
    tree.setCell(new SimpleAbstractCell()); 
    tree.getSelectionModel().setSelectionMode(SelectionMode.SINGLE); 

    add(tree); 
}

这就是全部。我希望它对smb有用。

来源

2013-10-30 07:18:35 De3MoHD

更改节点样式

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