AbstractScaledWidgetEditPart.java

package org.csstudio.sds.components.ui.internal.editparts;

import org.csstudio.sds.components.model.AbstractScaledWidgetModel;
import org.csstudio.sds.components.ui.internal.figures.AbstractScaledWidgetFigure;
import org.csstudio.sds.ui.editparts.AbstractBaseEditPart;
import org.csstudio.sds.ui.editparts.AbstractWidgetEditPart;
import org.csstudio.sds.ui.editparts.IWidgetPropertyChangeHandler;
import org.eclipse.draw2d.IFigure;

/**
 * Base editPart controller for a widget based on {@link AbstractScaledWidgetModel}.
 * 
 * @author Xihui Chen
 * 
 */
public abstract class AbstractScaledWidgetEditPart extends AbstractWidgetEditPart {

	/**
	 * Sets those properties on the figure that are defined in the
	 * {@link AbstractScaledWidgetFigure} base class. This method is provided for the
	 * convenience of subclasses, which can call this method in their
	 * implementation of {@link AbstractBaseEditPart#doCreateFigure()}.
	 * 
	 * @param figure
	 *            the figure.
	 * @param model
	 *            the model.
	 */
	protected void initializeCommonFigureProperties(
			final AbstractScaledWidgetFigure figure, final AbstractScaledWidgetModel model) {
		
		figure.setRange(model.getMinimum(), model.getMaximum());
		figure.setValue(model.getValue());
		figure.setMajorTickMarkStepHint(model.getMajorTickStepHint());
		figure.setLogScale(model.isLogScaleEnabled());
		figure.setShowScale(model.isShowScale());
		figure.setShowMinorTicks(model.isShowMinorTicks());	
		figure.setTransparent(model.isTransparent());
		
		
	}	
	
	/**
	 * Registers property change handlers for the properties defined in
	 * {@link AbstractScaledWidgetModel}. This method is provided for the convenience
	 * of subclasses, which can call this method in their implementation of
	 * {@link #registerPropertyChangeHandlers()}.
	 */
	protected void registerCommonPropertyChangeHandlers() {
		setValueHandler();
		setMinRangeHandler();
		setMaxRangeHandler();
		setMajorTickMarkStepHintHandler();
		setLogScaleHandler();
		setShowScaleHandler();
		setShowMinorTicksHandler();
		setTransparentHandler();
	}

    /**
     * 
     */
    private void setTransparentHandler() {
        IWidgetPropertyChangeHandler transparentHandler = new IWidgetPropertyChangeHandler() {
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue,
					final IFigure refreshableFigure) {
				AbstractScaledWidgetFigure figure = (AbstractScaledWidgetFigure) refreshableFigure;
				figure.setTransparent((Boolean) newValue);
				return true;
			}
		};
		setPropertyChangeHandler(AbstractScaledWidgetModel.PROP_TRANSPARENT, transparentHandler);
    }

    /**
     * 
     */
    private void setShowMinorTicksHandler() {
        IWidgetPropertyChangeHandler showMinorTicksHandler = new IWidgetPropertyChangeHandler() {
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue,
					final IFigure refreshableFigure) {
				AbstractScaledWidgetFigure figure = (AbstractScaledWidgetFigure) refreshableFigure;
				figure.setShowMinorTicks((Boolean) newValue);
				return true;
			}
		};
		setPropertyChangeHandler(AbstractScaledWidgetModel.PROP_SHOW_MINOR_TICKS, showMinorTicksHandler);
    }

    /**
     * 
     */
    private void setShowScaleHandler() {
        IWidgetPropertyChangeHandler showScaleHandler = new IWidgetPropertyChangeHandler() {
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue,
					final IFigure refreshableFigure) {
				AbstractScaledWidgetFigure figure = (AbstractScaledWidgetFigure) refreshableFigure;
				figure.setShowScale((Boolean) newValue);
				return true;
			}
		};
		setPropertyChangeHandler(AbstractScaledWidgetModel.PROP_SHOW_SCALE, showScaleHandler);
    }

    /**
     * 
     */
    private void setLogScaleHandler() {
        IWidgetPropertyChangeHandler logScaleHandler = new IWidgetPropertyChangeHandler() {
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue,
					final IFigure refreshableFigure) {
				AbstractScaledWidgetFigure figure = (AbstractScaledWidgetFigure) refreshableFigure;
				figure.setLogScale((Boolean) newValue);
				return true;
			}
		};
		setPropertyChangeHandler(AbstractScaledWidgetModel.PROP_LOG_SCALE, logScaleHandler);
    }

    /**
     * 
     */
    private void setMajorTickMarkStepHintHandler() {
        IWidgetPropertyChangeHandler majorTickHandler = new IWidgetPropertyChangeHandler() {
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue,
					final IFigure refreshableFigure) {
				AbstractScaledWidgetFigure figure = (AbstractScaledWidgetFigure) refreshableFigure;
				figure.setMajorTickMarkStepHint((Double) newValue);
				return true;
			}
		};
		setPropertyChangeHandler(AbstractScaledWidgetModel.PROP_MAJOR_TICK_STEP_HINT, majorTickHandler);
    }

    /**
     * 
     */
    private void setMaxRangeHandler() {
        IWidgetPropertyChangeHandler maximumHandler = new IWidgetPropertyChangeHandler() {
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue,
					final IFigure refreshableFigure) {
				AbstractScaledWidgetFigure figure = (AbstractScaledWidgetFigure) refreshableFigure;
				figure.setRange(((AbstractScaledWidgetModel)getModel()).getMinimum(), (Double) newValue);
				return true;
			}
		};
		setPropertyChangeHandler(AbstractScaledWidgetModel.PROP_MAX, maximumHandler);
    }

    /**
     * 
     */
    private void setMinRangeHandler() {
        IWidgetPropertyChangeHandler minimumHandler = new IWidgetPropertyChangeHandler() {
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue,
					final IFigure refreshableFigure) {
				AbstractScaledWidgetFigure figure = (AbstractScaledWidgetFigure) refreshableFigure;
				figure.setRange((Double) newValue, ((AbstractScaledWidgetModel)getModel()).getMaximum());
				return true;
			}
		};
		setPropertyChangeHandler(AbstractScaledWidgetModel.PROP_MIN, minimumHandler);
    }

    /**
     * 
     */
    private void setValueHandler() {
        IWidgetPropertyChangeHandler valueHandler = new IWidgetPropertyChangeHandler() {
			@Override
			public boolean handleChange(final Object oldValue,
					final Object newValue,
					final IFigure refreshableFigure) {
				AbstractScaledWidgetFigure figure = (AbstractScaledWidgetFigure) refreshableFigure;
				figure.setValue((Double) newValue);
				return true;
			}
		};
		setPropertyChangeHandler(AbstractScaledWidgetModel.PROP_VALUE, valueHandler);
    }

}