Java tutorial
/* * This file is part of the ISIS IBEX application. * Copyright (C) 2012-2015 Science & Technology Facilities Council. * All rights reserved. * * This program is distributed in the hope that it will be useful. * This program and the accompanying materials are made available under the * terms of the Eclipse Public License v1.0 which accompanies this distribution. * EXCEPT AS EXPRESSLY SET FORTH IN THE ECLIPSE PUBLIC LICENSE V1.0, THE PROGRAM * AND ACCOMPANYING MATERIALS ARE PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES * OR CONDITIONS OF ANY KIND. See the Eclipse Public License v1.0 for more details. * * You should have received a copy of the Eclipse Public License v1.0 * along with this program; if not, you can obtain a copy from * https://www.eclipse.org/org/documents/epl-v10.php or * http://opensource.org/licenses/eclipse-1.0.php */ package uk.ac.stfc.isis.ibex.ui.synoptic.widgets; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import java.util.List; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.beans.BeanProperties; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Combo; import org.eclipse.wb.swt.ResourceManager; import org.eclipse.wb.swt.SWTResourceManager; import uk.ac.stfc.isis.ibex.ui.synoptic.Activator; import uk.ac.stfc.isis.ibex.ui.synoptic.NavigationPresenter; import uk.ac.stfc.isis.ibex.ui.synoptic.SynopticPresenter; @SuppressWarnings("checkstyle:magicnumber") public class Navigator extends Composite { private final SynopticPresenter presenter; private final Button previous; private final Button up; private final Button next; private final Combo gotoCombo; private static final Color BACKGROUND = SWTResourceManager.getColor(240, 240, 240); public Navigator(Composite parent, int style) { super(parent, style); GridLayout gridLayout = new GridLayout(6, false); gridLayout.marginRight = 2; gridLayout.marginLeft = 2; gridLayout.marginTop = -6; gridLayout.marginBottom = -6; setLayout(gridLayout); gotoCombo = new Combo(this, SWT.READ_ONLY); GridData gdGotoCombo = new GridData(SWT.FILL, SWT.CENTER, false, false, 1, 1); gdGotoCombo.widthHint = 120; gotoCombo.setLayoutData(gdGotoCombo); new Label(this, SWT.NONE); previous = new Button(this, SWT.NONE); previous.setImage( ResourceManager.getPluginImage("uk.ac.stfc.isis.ibex.ui.synoptic", "icons/navigate_left.png")); previous.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false, 1, 1)); up = new Button(this, SWT.NONE); up.setImage(ResourceManager.getPluginImage("uk.ac.stfc.isis.ibex.ui.synoptic", "icons/navigate_up.png")); up.setSelection(true); up.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false, 1, 1)); next = new Button(this, SWT.NONE); next.setImage( ResourceManager.getPluginImage("uk.ac.stfc.isis.ibex.ui.synoptic", "icons/navigate_right.png")); next.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false, 1, 1)); presenter = Activator.getDefault().presenter(); setTargets(presenter.getTargets()); setModel(presenter.navigator()); SynoptictBreadCrumb instrumentTrail = new SynoptictBreadCrumb(this, SWT.PUSH); instrumentTrail.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false, 1, 1)); instrumentTrail.setBackground(BACKGROUND); } private void setModel(final NavigationPresenter navigator) { DataBindingContext bindingContext = new DataBindingContext(); bindingContext.bindValue(WidgetProperties.enabled().observe(previous), BeanProperties.value("hasPrevious").observe(navigator)); bindingContext.bindValue(WidgetProperties.enabled().observe(up), BeanProperties.value("hasUp").observe(navigator)); bindingContext.bindValue(WidgetProperties.enabled().observe(next), BeanProperties.value("hasNext").observe(navigator)); bindingContext.bindList(WidgetProperties.items().observe(gotoCombo), BeanProperties.list("targets").observe(presenter)); previous.setToolTipText(navigator.nameOfPrevious()); up.setToolTipText(navigator.nameOfUp()); next.setToolTipText(navigator.nameOfNext()); navigator.addPropertyChangeListener("currentNode", new PropertyChangeListener() { @Override public void propertyChange(PropertyChangeEvent e) { previous.setToolTipText(navigator.nameOfPrevious()); up.setToolTipText(navigator.nameOfUp()); // Next button has text direction right to left in order to place // image on the right hand side. This causes parentheses to be // incorrectly formatted. next.setToolTipText(navigator.nameOfNext().replace("(", "- ").replace(')', ' ')); } }); previous.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { navigator.previous(); } }); up.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { navigator.up(); } }); next.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { navigator.next(); } }); } private void setTargets(List<String> targetNames) { gotoCombo.setItems(targetNames.toArray(new String[0])); gotoCombo.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { String item = gotoCombo.getText(); presenter.navigateTo(item); } }); } @Override public void setBackground(Color color) { super.setBackground(color); previous.setBackground(color); up.setBackground(color); next.setBackground(color); } }