更改節點樣式

在我的項目中，我使用gwt 2.5.1和gxt 3.0.1。我創建樹。更改節點樣式

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); 
}

我嘗試改變未激活的節點的樣式。但我無法解決這個問題，因爲瀏覽器顯示它們錯了！

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

是有沒有辦法解決此問題的方法？

來源

2013-10-29 De3MoHD

我解決了這個問題。幫助的文章是here。

有一個簡單的代碼示例。

您應該創建一個繼承的類AbstractCell和重寫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); 
    } 
}

在創建過程中一棵樹，你應該申報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); 
}

這就是全部。我希望它對smb有用。

來源

2013-10-30 07:18:35 De3MoHD

更改節點樣式

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