ListGrid SelectionChangedHandler bug

[Hirn]

I slightly changed the Simple Select Sample in this way...

       public class SimpleSelectSample implements EntryPoint {  
Canvas canvas = new Canvas();

        final ListGrid selectedCountriesGrid = new ListGrid();
        selectedCountriesGrid.setWidth(250);
        selectedCountriesGrid.setHeight(100);
        selectedCountriesGrid.setTop(250);
        selectedCountriesGrid.setShowAllRecords(true);
        ListGridField selectedCountriesField = new ListGridField("countryName", "Selected Countries");
        selectedCountriesGrid.setFields(selectedCountriesField);

        final ListGrid countryGrid = new ListGrid();
        countryGrid.setWidth(500);
        countryGrid.setHeight(224);
        countryGrid.setShowAllRecords(true);
        countryGrid.setSelectionType(SelectionStyle.SIMPLE);

        ListGridField countryCodeField = new ListGridField("countryCode", "Flag", 40);
        countryCodeField.setAlign(Alignment.CENTER);
        countryCodeField.setType(ListGridFieldType.IMAGE);
        countryCodeField.setImageURLPrefix("flags/16/");
        countryCodeField.setImageURLSuffix(".png");

        ListGridField nameField = new ListGridField("countryName", "Country");
---------------------------------------------------------
        nameField.setFrozen(true);
---------------------------------------------------------
        ListGridField capitalField = new ListGridField("capital", "Capital");
        ListGridField continentField = new ListGridField("continent", "Continent");
        countryGrid.setFields(countryCodeField, nameField, capitalField, continentField);

        countryGrid.setData(CountrySampleData.getRecords());
        countryGrid.addSelectionChangedHandler(new SelectionChangedHandler() {
            public void onSelectionChanged(SelectionEvent event) {
                selectedCountriesGrid.setData(countryGrid.getSelection());
            }
        });

        canvas.addChild(countryGrid);
        canvas.addChild(selectedCountriesGrid);

        canvas.draw();
    }

And now, when I select a row for the first time, the SelectionChanged event handler is called twice
If I select another row, the SelectionChanged is called four times.

SmartClient Version v12.1p_2022-11-02/Pro Deployment (2022-11-02)

[Hirn]

The same thing happens if you add such code to the Timeline example...

ListGridField titleField = new ListGridField("title");

        ListGrid tasksLineProps = new ListGrid();
        tasksLineProps.setCanSort(false);
        tasksLineProps.setSelectionType(SelectionStyle.SINGLE);
        tasksLineProps.setShowSelectedStyle(true);
        tasksLineProps.setFields(titleField);

        tasksLineProps.addSelectionChangedHandler(new SelectionChangedHandler() {
            @Override
            public void onSelectionChanged(SelectionEvent event) {
----
----
            }
        });

Timeline calendar = new Timeline();
calendar.setAutoChildProperties("timelineView", tasksLineProps);
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[Isomorphic]

Thanks for the notification and the additional information.
We've made a change to the framework to address this problem. Please try the next nightly build, dated May 19 2023 or above

Regards
Isomorphic Software