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  1. #1
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    Default Answered: Custom PropertyEditor / ValueBaseInputCell

    Answered: Custom PropertyEditor / ValueBaseInputCell


    I'm trying to write a custom field editor that will translate between Long and String. IE: String representation on screen but field type is a Long.

    I've implemented the PropertyEditor (HrMinPropertyEditor) but don't know how to wire it in. My HrMinField is quite clunky as I needed to use a TriggerFieldCell because the generic types inside TextInputCell prevented me from using it.

    Do I need to do a subclass of ValueBaseInputCell? That seems strange since my PropertyEditor has all the Long / String conversions. It also looks difficult.

    If so, is there a simple example or some documentation I can read?

    BTW, my learning project is Maven based and should be easy to fire up if necessary:
    1. svn checkout http://subversion.assembla.com/svn/f...lic/learn/gwt/ learn-gwt
    2. mvn gwt:run
    3. Navigate to GXT | Forms | Time Edit

    Thanks in advance,
    Pete

  2. Well I managed to get something going using a Converter and a Validator. The code below uses a Builder to construct the UI but you should be able to get the gist...

    From my PeriodBeanEditor:
    Code:
        @Ignore
        TextField hrMinField;
    
        ConverterEditorAdapter<Long, String, TextField> hrMin;
    
        @Override
        protected Widget createWidget() {
            FlowLayoutContainer c = new FlowLayoutContainerBuilder()
                    .add(new FieldLabelBuilder()
                            .text("Hr Min")
                            .widget(hrMinField = new TextFieldBuilder()
                                    .allowBlank(false)
                                    .addValidator(HrMinConverter.VALIDATOR)
                                    .textField)
                            .fieldLabel)
                    .flowLayoutContainer;
            hrMin = new ConverterEditorAdapter(hrMinField, HrMinConverter.INSTANCE);
            return c;
        }
    From my HrMinConverter:
    Code:
    public class HrMinConverter implements Converter<Long, String> {
        private static final String RE_STR = "^(-?)(\\d+)(:([0-5]?)(\\d))?$";
        public static final RegExp RE = RegExp.compile(RE_STR);
        public static final String RE_MSG = "Must be in the form '-h:m', '-' and ':m' are optional";
        public static final HrMinConverter INSTANCE = new HrMinConverter();
        public static final RegExValidator VALIDATOR = new RegExValidator(RE_STR, RE_MSG);
    ...
    For what it's worth I'm trying to publish the bean builder generator tool (b-generation) so I can use it in various places.

  3. #2
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    Default Converter + Validator Solution

    Converter + Validator Solution


    Well I managed to get something going using a Converter and a Validator. The code below uses a Builder to construct the UI but you should be able to get the gist...

    From my PeriodBeanEditor:
    Code:
        @Ignore
        TextField hrMinField;
    
        ConverterEditorAdapter<Long, String, TextField> hrMin;
    
        @Override
        protected Widget createWidget() {
            FlowLayoutContainer c = new FlowLayoutContainerBuilder()
                    .add(new FieldLabelBuilder()
                            .text("Hr Min")
                            .widget(hrMinField = new TextFieldBuilder()
                                    .allowBlank(false)
                                    .addValidator(HrMinConverter.VALIDATOR)
                                    .textField)
                            .fieldLabel)
                    .flowLayoutContainer;
            hrMin = new ConverterEditorAdapter(hrMinField, HrMinConverter.INSTANCE);
            return c;
        }
    From my HrMinConverter:
    Code:
    public class HrMinConverter implements Converter<Long, String> {
        private static final String RE_STR = "^(-?)(\\d+)(:([0-5]?)(\\d))?$";
        public static final RegExp RE = RegExp.compile(RE_STR);
        public static final String RE_MSG = "Must be in the form '-h:m', '-' and ':m' are optional";
        public static final HrMinConverter INSTANCE = new HrMinConverter();
        public static final RegExValidator VALIDATOR = new RegExValidator(RE_STR, RE_MSG);
    ...
    For what it's worth I'm trying to publish the bean builder generator tool (b-generation) so I can use it in various places.