Examples of org.eclipse.nebula.widgets.nattable.summaryrow.command.CalculateSummaryRowValuesCommand

org.eclipse.nebula.widgets.nattable.summaryrow.command.CalculateSummaryRowValuesCommand

Command to trigger the calculation of the summary row values manually.

Usually the calculation will be triggered when the summary row moves into the viewport. For large tables that should be printed or exported the calculation is too late. This is because the calculation happens in a seperate thread to avoid freezing of the table on calculation.

There is no special handler for this event, as it is tight coupled to the summary row. Therefore the handling of this command is implemented directly in the SummaryRowLayer.

Note: This is only intended for internal usage and could cause a performance leak. If you want to use it for your use cases you should be careful about performance issues. @author Dirk Fauth @see SummaryRowLayer

        @Override
        public void run() {
            if (printer.startJob("NatTable")) { //$NON-NLS-1$
                // if a SummaryRowLayer is in the layer stack, we need to ensure
                // that the values are calculated
                layer.doCommand(new CalculateSummaryRowValuesCommand());


                // ensure that the viewport is turned off
                layer.doCommand(new TurnViewportOffCommand());


                // set the size of the layer according to the print setttings

        layer.doCommand(new TurnViewportOffCommand());
        setClientAreaToMaximum(layer);


        // if a SummaryRowLayer is in the layer stack, we need to ensure that
        // the values are calculated
        layer.doCommand(new CalculateSummaryRowValuesCommand());


        ProgressBar progressBar = null;


        if (shell != null) {
            Shell childShell = new Shell(shell.getDisplay(), SWT.DIALOG_TRIM


    @Test
    public void shouldSummarizeAskPriceColumnImmediatelyOnPreCalculation()
            throws Exception {
        // Trigger summary calculation via command
        natTable.doCommand(new CalculateSummaryRowValuesCommand());


        Object askPriceSummary = natTable.getDataValueByPosition(
                askPriceColumnIndex, 4);
        assertEquals("110.0", askPriceSummary.toString());
    }

Examples of org.eclipse.nebula.widgets.nattable.summaryrow.command.CalculateSummaryRowValuesCommand

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