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  1. #1
    Sencha User
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    Default [GXT 2.2.5] NPE in Checkbox

    [GXT 2.2.5] NPE in Checkbox


    Code:
    at com.extjs.gxt.ui.client.widget.form.CheckBox.setBoxLabel(CheckBox.java:116)
    To reproduce add a checkbox with box label null to a panel.
    If after rendering the lable is changed the NPE is thrown as boxLabelEl is null.

    Code:
    public void setBoxLabel(String boxLabel) {    this.boxLabel = boxLabel;
        if (rendered) {
          boxLabelEl.update(getBoxLabel());
        }
      }
    as of:

    Code:
    @Override  protected void onRender(Element target, int index) {
        ...
        if (boxLabel != null) {
          boxLabelEl = new El(DOM.createLabel());
          ...
        }
    ...
      }

  2. #2
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    Default


    As workaround you should use setBoxLabel("") initially.

  3. #3
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    Default


    Hello Sven,

    thanks again for your fast reply.

    In some cases box labels have to be null. For empty Strings the onRender method adds a label Element to the dom. My workaround overrides the CheckBox#setBoxLabel(String) Method. As in onRender my method adds or removes the label element from the dom depending on the old and new box label.

    Greetings Nico.

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