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

Example 1 with RuntimePVListener

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

the class XYPlotWidgetRuntime method stop.

@Override
public void stop() {
    // Disconnect Marker PVs and listeners
    for (Map.Entry<WidgetProperty<?>, WidgetPropertyListener<?>> entry : marker_prop_listeners.entrySet()) entry.getKey().removePropertyListener(entry.getValue());
    marker_prop_listeners.clear();
    for (Map.Entry<RuntimePV, RuntimePVListener> entry : marker_pv_listeners.entrySet()) entry.getKey().removeListener(entry.getValue());
    marker_pv_listeners.clear();
    for (RuntimePV pv : marker_pvs) {
        removePV(pv);
        PVFactory.releasePV(pv);
    }
    marker_pvs.clear();
    for (PVNameToValueBinding binding : bindings) binding.dispose();
    super.stop();
}

Example 2 with RuntimePVListener

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

the class PVFactoryTest method testPVFactory.

@Test
public void testPVFactory() throws Exception {
    final RuntimePV pv = PVFactory.getPV("loc://test(3.14)");
    try {
        // vtype.pv uses the base name, without initializer
        assertThat(pv.getName(), equalTo("loc://test"));
        final CountDownLatch updates = new CountDownLatch(1);
        final AtomicReference<Number> number = new AtomicReference<>();
        RuntimePVListener listener = new RuntimePVListener() {

            @Override
            public void valueChanged(RuntimePV pv, VType value) {
                System.out.println(pv.getName() + " = " + value);
                number.set(VTypeUtil.getValueNumber(value));
                updates.countDown();
            }
        };
        pv.addListener(listener);
        updates.await();
        assertThat(number.get(), equalTo(3.14));
    } finally {
        PVFactory.releasePV(pv);
    }
}

Example 3 with RuntimePVListener

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

the class PVUtil method createPV.

/**
 * Create a PV.
 *
 *  <p>Ideally, scripts use the PVs of widgets or the script 'input' PVs,
 *  where the display runtime handles the PV connection.
 *  In rare cases it might be necessary to create a PV in a script,
 *  in which case the script <b>must</b> then also release the PV.
 *
 *  @param pv_name Mame of the PV
 *  @param timeout Connection timeout in milliseconds
 *  @return PV
 *  @throws Exception on error
 *  @see #releasePV(RuntimePV)
 */
public static RuntimePV createPV(final String pv_name, final int timeout_ms) throws Exception {
    final CountDownLatch connected = new CountDownLatch(1);
    final RuntimePVListener await_connection = new RuntimePVListener() {

        @Override
        public void valueChanged(final RuntimePV pv, final VType value) {
            if (value != null)
                connected.countDown();
        }
    };
    final RuntimePV pv = PVFactory.getPV(pv_name);
    pv.addListener(await_connection);
    try {
        if (!connected.await(timeout_ms, TimeUnit.MILLISECONDS)) {
            PVFactory.releasePV(pv);
            throw new Exception("Failed to connect to '" + pv_name + "' within " + timeout_ms + " ms");
        }
    } finally {
        pv.removeListener(await_connection);
    }
    return pv;
}

Example 4 with RuntimePVListener

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

the class ImageWidgetRuntime method bindROI.

/**
 * Bind an ROI PV to an ROI value
 *  @param name_prop Property for the PV name
 *  @param value_prop Property for the value
 */
private void bindROI(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 ROI PV {1}", new Object[] { widget, pv_name });
    try {
        final RuntimePV pv = PVFactory.getPV(pv_name);
        addPV(pv);
        roi_pvs.add(pv);
        // Write value changes to the PV
        final WidgetPropertyListener<Double> prop_listener = (prop, old, value) -> {
            try {
                if (value == VTypeUtil.getValueNumber(pv.read()).doubleValue())
                    return;
                // System.out.println("Writing " + value_prop + " to PV " + pv_name);
                pv.write(value);
            } catch (Exception ex) {
                logger.log(Level.WARNING, "Error writing ROI value to PV " + pv_name, ex);
            }
        };
        value_prop.addPropertyListener(prop_listener);
        roi_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 from PV " + pv_name + " to " + value_prop);
                value_prop.setValue(number);
            }
        };
        pv.addListener(pv_listener);
        roi_pv_listeners.put(pv, pv_listener);
    } catch (Exception ex) {
        logger.log(Level.WARNING, "Error connecting ROI PV " + pv_name, ex);
    }
}

Example 5 with RuntimePVListener

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

the class ImageWidgetRuntime method stop.

@Override
public void stop() {
    // Disconnect ROI PVs and listeners
    for (Map.Entry<WidgetProperty<?>, WidgetPropertyListener<?>> entry : roi_prop_listeners.entrySet()) entry.getKey().removePropertyListener(entry.getValue());
    roi_prop_listeners.clear();
    for (Map.Entry<RuntimePV, RuntimePVListener> entry : roi_pv_listeners.entrySet()) entry.getKey().removeListener(entry.getValue());
    roi_pv_listeners.clear();
    for (RuntimePV pv : roi_pvs) {
        removePV(pv);
        PVFactory.releasePV(pv);
    }
    roi_pvs.clear();
    // Disconnect cursor info PV
    if (x_pv != null && y_pv != null) {
        y_pv.removeListener(cursor_pv_listener);
        x_pv.removeListener(cursor_pv_listener);
    }
    if (unbind(cursor_pv))
        widget.runtimePropCursorInfo().removePropertyListener(cursor_info_listener);
    boolean x_or_y = unbind(y_pv);
    x_or_y |= unbind(x_pv);
    if (x_or_y)
        widget.runtimePropCrosshair().removePropertyListener(crosshair_listener);
    y_pv = x_pv = cursor_pv = null;
    super.stop();
}