Examples with WidgetPropertyListener org.csstudio.display.builder.model.WidgetPropertyListener used on opensource projects

Example 6 with WidgetPropertyListener

use of org.csstudio.display.builder.model.WidgetPropertyListener in project org.csstudio.display.builder by kasemir.

the class ImageRepresentation method createROI.

private void createROI(final ROIWidgetProperty model_roi) {
    final RegionOfInterest plot_roi = image_plot.addROI(model_roi.name().getValue(), JFXUtil.convert(model_roi.color().getValue()), model_roi.visible().getValue(), model_roi.interactive().getValue());
    // Show/hide ROI as roi.visible() changes
    model_roi.visible().addPropertyListener((prop, old, visible) -> {
        plot_roi.setVisible(visible);
        Platform.runLater(() -> image_plot.removeROITracker());
        image_plot.requestUpdate();
    });
    // For now _not_ listening to runtime changes of roi.interactive() or roi.file() ...
    // Listen to roi.x_value(), .. and update plot_roi
    final WidgetPropertyListener<Double> model_roi_listener = (o, old, value) -> {
        if (changing_roi)
            return;
        Rectangle2D region = plot_roi.getRegion();
        region = new Rectangle2D(existingOrProperty(region.getMinX(), model_roi.x_value()), existingOrProperty(region.getMinY(), model_roi.y_value()), existingOrProperty(region.getWidth(), model_roi.width_value()), existingOrProperty(region.getHeight(), model_roi.height_value()));
        changing_roi = true;
        plot_roi.setRegion(region);
        changing_roi = false;
        image_plot.requestUpdate();
    };
    model_roi.x_value().addPropertyListener(model_roi_listener);
    model_roi.y_value().addPropertyListener(model_roi_listener);
    model_roi.width_value().addPropertyListener(model_roi_listener);
    model_roi.height_value().addPropertyListener(model_roi_listener);
    // Load image file (if there is one) on background thread
    ModelThreadPool.getExecutor().execute(() -> loadROI_Image(plot_roi, model_roi));
}

Example 7 with WidgetPropertyListener

use of org.csstudio.display.builder.model.WidgetPropertyListener in project org.csstudio.display.builder by kasemir.

the class PropertyChangeHandler method firePropertyChange.

/**
 * Notify listeners of property change.
 *
 *  <p>New value usually matches <code>property.getValue()</code>,
 *  but in multi-threaded context value might already have changed
 *  _again_ by the time this executes.
 *
 *  <p>Suppresses notifications where old_value equals new_value,
 *  unless both values are null, treating that as a "notify anyway"
 *  case.
 *
 *  @param property Property that changed, or <code>null</code> for "many"
 *  @param old_value Original value
 *  @param new_value New value
 */
@SuppressWarnings("unchecked")
protected void firePropertyChange(final WidgetProperty<T> property, final T old_value, final T new_value) {
    // Does anybody care?
    final List<BaseWidgetPropertyListener> safe_copy = listeners;
    if (safe_copy == null)
        return;
    // Any change at all?
    if (new_value != null && old_value != null && new_value.equals(old_value))
        return;
    // If a property listener changes the property,
    // that triggers a recursive listener invocation.
    // Not necessarily a problem, but likely better avoided.
    final int recursion_level = recursions.incrementAndGet();
    if (recursion_level > 1)
        logger.log(Level.WARNING, "Recursive update of property " + property.getName() + ", " + recursion_level + " deep");
    // Notify listeners
    for (BaseWidgetPropertyListener listener : safe_copy) {
        try {
            if (listener instanceof WidgetPropertyListener)
                ((WidgetPropertyListener<T>) listener).propertyChanged(property, old_value, new_value);
            else
                ((UntypedWidgetPropertyListener) listener).propertyChanged(property, old_value, new_value);
        } catch (Throwable ex) {
            // Log error, then continue with next listener
            logger.log(Level.WARNING, "Property update error for " + property, ex);
        }
    }
    recursions.decrementAndGet();
}