Datasource fetch causing cursor jump if masksaveliterals are enabled

[zsolt.sandor]

1. SmartGWT lgpl-5.0-p20150628
2. Firefox 39.0
3. No server side component necessary

Basic steps to create the applications:

1, Create a datasource which is pointing to somewhere
2, Create a timer that periodically fetches the datasource
3, Create a form
4, Add a textItem to the form with mask AND setMaskSaveLiterals set to true
5, Display form
6, Start application

Steps to reproduce the bug:

7, Enter some digits in the textfield (like 55) and wait till the timer starts a database fetch
8, The cursor is jumping to the end of the textitem

If I remove either the automatic fetch OR the setMaskSaveLiterals() option then cursor does not move in case of timer action is executed.

public class SmartGWTTextItem implements EntryPoint {

CountryDS dataSource = CountryDS.getInstance();

/**
* This is the entry point method.
*/
public void onModuleLoad() {

Timer t = new Timer() {
@Override
public void run() {
updateMethod();
}
};

t.scheduleRepeating(5000);

DynamicForm form = new DynamicForm();
form.setWidth(400);

TextItem dateField = new TextItem("date", "My custom date");
dateField.setMask("##-##-####");
dateField.setMaskSaveLiterals(true);

form.setFields(dateField);
form.draw();
}

private void updateMethod(){
dataSource.fetchData(new Criteria(), new DSCallback() {

@Override
public void execute(DSResponse dsResponse, Object data, DSRequest dsRequest) {
// do nothing
}
});
}

private static class CountryDS extends DataSource {
// The DataSource would normally be defined external to any classes that use it.

private static CountryDS instance = null;

public static CountryDS getInstance() {
if (instance == null) {
instance = new CountryDS("countryDS_JSON");
}
return instance;
}

public CountryDS(String id) {
setID(id);
setDataFormat(DSDataFormat.JSON);
DataSourceField countryCodeField = new DataSourceField("countryCode", FieldType.TEXT, "Code");
DataSourceField countryNameField = new DataSourceField("countryName", FieldType.TEXT, "Country");
DataSourceField capitalField = new DataSourceField("capital", FieldType.TEXT, "Capital");
setFields(countryCodeField, countryNameField, capitalField);
setDataURL("ds/countryData.json");
}

}


}

[Isomorphic]

DataSources fetches block the UI by default, which means focus is moved away from the field and back. Rather than worry about this moving the input point, for a periodic fetch you almost certainly want to avoid blocking the UI at all. Use showPrompt:false to do so.

[zsolt.sandor]

Thank you very much for your quick response. So the reason is something i suspected.

My question is: could you please provide me an URL to the javadoc to which component i should set showPrompt? Is it the DataSource?

I think my issue is related to this previous one:

http://forums.smartclient.com/showthread.php?t=25866

[zsolt.sandor]

This is how i solved the problem, however i think this is not a "proper" solution but a workaround...

private void updateMethod(){

DSRequest request = new DSRequest();
request.setShowPrompt(false);

dataSource.fetchData(new Criteria(), new DSCallback() {

@Override
public void execute(DSResponse dsResponse, Object data, DSRequest dsRequest) {
// do nothing
}
}, request);

}