DisplayReadOut.java

package org.goko.tools.dro;


import javax.annotation.PostConstruct;
import javax.inject.Inject;

import org.apache.commons.collections.CollectionUtils;
import org.eclipse.core.commands.Command;
import org.eclipse.core.commands.Parameterization;
import org.eclipse.core.commands.ParameterizedCommand;
import org.eclipse.core.commands.common.NotDefinedException;
import org.eclipse.e4.core.commands.ECommandService;
import org.eclipse.e4.core.commands.EHandlerService;
import org.eclipse.e4.core.contexts.IEclipseContext;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;
import org.eclipse.wb.swt.ResourceManager;
import org.eclipse.wb.swt.SWTResourceManager;
import org.goko.common.GkUiComponent;
import org.goko.core.common.exception.GkException;
import org.goko.core.common.exception.GkTechnicalException;
import org.goko.core.controller.bean.MachineValueDefinition;
import org.goko.core.log.GkLog;
import org.goko.tools.dro.controller.DisplayReadOutController;
import org.goko.tools.dro.controller.DisplayReadOutModel;
import org.goko.tools.dro.preferences.DROPreferences;

/**
 * DRO part
 *
 * @author PsyKo
 *
 */
public class DisplayReadOut extends GkUiComponent<DisplayReadOutController, DisplayReadOutModel> implements IPropertyChangeListener{
	/** LOG */
	private static final GkLog LOG = GkLog.getLogger(DisplayReadOut.class);
	private Composite parentComposite;
	@Inject
	private ECommandService commandService;
	@Inject
	private EHandlerService handlerService;
	
	@Inject
	public DisplayReadOut(IEclipseContext context) {
		super(context, new DisplayReadOutController());			
	}

	/**
	 * Create contents of the view part.
	 * @throws GkException GkException
	 */
	@PostConstruct
	public void createControls(Composite parent) {
		parent.setLayout(new FillLayout(SWT.HORIZONTAL));

		this.parentComposite = new Composite(parent, SWT.NONE);
		if(CollectionUtils.isEmpty(getDataModel().getObservedValuesDefinition())){
			createEmptyPanel(parentComposite);
		}else{
			createFields(parentComposite);
		}
		DROPreferences.getInstance().addPropertyChangeListener(this);
	}

	private void createEmptyPanel(Composite parent){
		parent.setLayout(new GridLayout(1, false));
		Composite composite = new Composite(parent, SWT.WRAP);
		composite.setLayout(new GridLayout(1, false));
		composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1));
		

		Label lblNoValueHere = new Label(composite, SWT.WRAP | SWT.CENTER);
		lblNoValueHere.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, false, 1, 1));

		lblNoValueHere.setText("No value here ? You can configure the displayed values in the preferences.");

		Button btnPreferences = new Button(composite, SWT.NONE);
		btnPreferences.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, false, 1, 1));
		btnPreferences.setImage(ResourceManager.getPluginImage("org.goko.tools.dro", "icons/gear.png"));
		btnPreferences.setText("Preferences");
		btnPreferences.addMouseListener(new MouseAdapter() {
			@Override
			public void mouseUp(MouseEvent e) {
				try {
					Command cmd = commandService.getCommand("org.goko.tools.dro.command.dropreferences");
					Parameterization param = new Parameterization(cmd.getParameter("goko.org.ui.page.id"), "org.goko.tools.dro.displayPreferences");
					ParameterizedCommand pCmd = new ParameterizedCommand(cmd, new Parameterization[]{param});
					if (handlerService.canExecute(pCmd)) {
						handlerService.executeHandler(pCmd);
					}
				} catch (NotDefinedException e1) {
					displayError(new GkTechnicalException(e1));
				}
			}
		});
	}
	
	private void createFields(Composite composite){
		composite.setBackground(SWTResourceManager.getColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW));
		composite.setLayout(new GridLayout(2, false));

		for(MachineValueDefinition definition : getDataModel().getObservedValuesDefinition()){
			Label label = new Label(composite, SWT.NONE);
			label.setBackground(SWTResourceManager.getColor(SWT.COLOR_WIDGET_HIGHLIGHT_SHADOW));
			label.setFont(SWTResourceManager.getFont("Segoe UI", 13, SWT.BOLD));
			label.setText(definition.getName());

			Text valueTxt = new Text(composite, SWT.BORDER | SWT.RIGHT | SWT.READ_ONLY);
			valueTxt.setText("--");
			valueTxt.setFont(SWTResourceManager.getFont("Consolas", 14, SWT.BOLD));

			GridData gridData = new GridData(SWT.FILL, SWT.CENTER, false, false, 1, 1);
			gridData.grabExcessHorizontalSpace = true;
			gridData.widthHint = 150;
			valueTxt.setLayoutData(gridData );
			getController().enableTextBindingOnValue(valueTxt, definition.getId());	
		}
	}

	/** (inheritDoc)
	 * @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
	 */
	@Override
	public void propertyChange(PropertyChangeEvent event) {
		if(parentComposite != null){
			/*
			 * Recreate fields for data when settings changes
			 */
			try {
				getController().updateDisplayedValues();				
				Composite parent = parentComposite.getParent();
				parentComposite.dispose();
				parentComposite = new Composite(parent, SWT.NONE);
				createControls(parentComposite);
				parent.setSize(parent.getSize());
				parent.layout();
			} catch (GkException e) {
				LOG.error(e);
			}
		}
	}


}