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    Default How to add Blank row in Simplecombobox?

    How to add Blank row in Simplecombobox?


    How to add Blank row in Simplecombobox in GXT 3?

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    Since the combo box is backed by a store, you'll need to add a <T> such that the result of your LabelProvider returns an empty string.

    Note that I have not tested this. It is possible that the UI will collapse this cell to not be the same height as the other cells in which case we'll need to try something else.

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    I want empty row of same height. Empty string will give very thin blank row. GXT 2 has setTemplate option by which we can achieve it. I want someway in gxt 3.

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    In the same way that you can use a template in gxt 2 (I think you draw a <br/>, though I don't recall, could be something with line-height instead), you can specify a SafeHtmlRenderer that returns custom html for any given value - pass this to the com.sencha.gxt.widget.core.client.form.ComboBox.ComboBox(ListStore<T>, LabelProvider<? super T>, SafeHtmlRenderer<T>) constructor. This can of course use an xtemplate - same basic impl as you used in GXT 2 should be acceptable and useful here, though with the GXT 3 version of XTemplates.

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    For making the empty entry same size, we added each entry a nbsp; via XTemplates.

    Code:
    public interface ComboBoxTemplates extends XTemplates {
        
        public final static ComboBoxTemplates INSTANCE = GWT.create(ComboBoxTemplates.class);
        
        @XTemplate("{text}&nbsp;")
        SafeHtml value(String text);
    }

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