Examples with RuntimePVListener org.csstudio.display.builder.runtime.pv.RuntimePVListener used on opensource projects

Example 6 with RuntimePVListener

use of org.csstudio.display.builder.runtime.pv.RuntimePVListener in project org.csstudio.display.builder by kasemir.

the class XYPlotWidgetRuntime method bindMarker.

private void bindMarker(final WidgetProperty<String> name_prop, final WidgetProperty<Double> value_prop) {
    final String pv_name = name_prop.getValue();
    if (pv_name.isEmpty())
        return;
    logger.log(Level.FINER, "Connecting {0} to Marker PV {1}", new Object[] { widget, pv_name });
    try {
        final RuntimePV pv = PVFactory.getPV(pv_name);
        addPV(pv);
        marker_pvs.add(pv);
        // Write value changes to the PV
        final WidgetPropertyListener<Double> prop_listener = (prop, old, value) -> {
            // Ignore if PV already has same value to break update loops
            double pv_value = VTypeUtil.getValueNumber(pv.read()).doubleValue();
            if (value == pv_value)
                return;
            try {
                // System.out.println("Writing " + value_prop + " to PV " + pv_name);
                pv.write(value);
            } catch (Exception ex) {
                logger.log(Level.WARNING, "Error writing marker value to PV " + pv_name, ex);
                // Restore property to the unchanged value of the PV
                value_prop.setValue(pv_value);
            }
        };
        value_prop.addPropertyListener(prop_listener);
        marker_prop_listeners.put(value_prop, prop_listener);
        // Write PV updates to the value
        final RuntimePVListener pv_listener = new RuntimePVListener() {

            @Override
            public void valueChanged(final RuntimePV pv, final VType value) {
                final double number = VTypeUtil.getValueNumber(value).doubleValue();
                if (number == value_prop.getValue())
                    return;
                // System.out.println("Writing " + number + " from PV " + pv_name + " to " + value_prop);
                value_prop.setValue(number);
            }
        };
        pv.addListener(pv_listener);
        marker_pv_listeners.put(pv, pv_listener);
    } catch (Exception ex) {
        logger.log(Level.WARNING, "Error connecting Marker PV " + pv_name, ex);
    }
}