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.editor.pv; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.beans.BeanProperties; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.layout.RowData; import org.eclipse.swt.layout.RowLayout; 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 uk.ac.stfc.isis.ibex.synoptic.model.desc.IO; /** * Composite that shows the options to set the PV details, and allows * choosing a PV either by a block, or by a PV. Choosing a block will * also automatically set the name. * */ @SuppressWarnings("checkstyle:magicnumber") public class PvDetailView extends Composite { private Composite noSelectionComposite; private Composite selectionComposite; private Composite fieldsComposite; private PvDetailViewModel model; private IO[] modeList = IO.values(); private Text txtName; private Text txtAddress; private ComboViewer cmboMode; private Button btnPickPV; private Composite buttonsComposite; private Button btnSelectBlock; /** * The constructor for the panel used to edit PV details. * * @param parent * The composite that holds this panel. * @param model * The view model that provides the display logic for the panel. */ public PvDetailView(Composite parent, PvDetailViewModel model) { super(parent, SWT.NONE); this.model = model; setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1)); createControls(this); bind(model); } /** * Creates the controls to be displayed on the panel. * * @param parent * The composite to display the controls on. */ public void createControls(Composite parent) { setLayout(new GridLayout(1, false)); noSelectionComposite = new Composite(parent, SWT.NONE); noSelectionComposite.setLayoutData(new GridData(SWT.CENTER, SWT.FILL, true, false, 1, 1)); noSelectionComposite.setLayout(new FillLayout()); Label lblNoSelection = new Label(noSelectionComposite, SWT.NONE); lblNoSelection.setText("Select a PV to view/edit details"); selectionComposite = new Composite(parent, SWT.NONE); selectionComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 1, 1)); selectionComposite.setLayout(new GridLayout(1, false)); fieldsComposite = new Composite(selectionComposite, SWT.NONE); fieldsComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 1, 1)); fieldsComposite.setLayout(new GridLayout(2, false)); Label lblName = new Label(fieldsComposite, SWT.NONE); lblName.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1)); lblName.setText("Name"); txtName = new Text(fieldsComposite, SWT.BORDER); txtName.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1)); Label lblAddress = new Label(fieldsComposite, SWT.NONE); lblAddress.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1)); lblAddress.setText("Address"); txtAddress = new Text(fieldsComposite, SWT.BORDER); txtAddress.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1)); Label lblMode = new Label(fieldsComposite, SWT.NONE); lblMode.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1)); lblMode.setText("Mode"); cmboMode = new ComboViewer(fieldsComposite, SWT.READ_ONLY); cmboMode.getCombo().setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1)); cmboMode.setContentProvider(ArrayContentProvider.getInstance()); cmboMode.setInput(modeList); cmboMode.getCombo().select(0); buttonsComposite = new Composite(selectionComposite, SWT.NONE); GridData gdComposite = new GridData(SWT.CENTER, SWT.CENTER, false, false, 1, 1); gdComposite.widthHint = 210; buttonsComposite.setLayoutData(gdComposite); buttonsComposite.setLayout(new RowLayout(SWT.HORIZONTAL)); btnSelectBlock = new Button(buttonsComposite, SWT.NONE); btnSelectBlock.setLayoutData(new RowData(100, SWT.DEFAULT)); btnSelectBlock.setText("Select Block"); btnSelectBlock.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { model.openBlockDialog(); } }); btnPickPV = new Button(buttonsComposite, SWT.NONE); btnPickPV.setLayoutData(new RowData(100, SWT.DEFAULT)); btnPickPV.setText("Select PV"); btnPickPV.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { model.openPvDialog(); } }); } private void bind(PvDetailViewModel model) { UpdateValueStrategy notConverter = new UpdateValueStrategy() { @Override public Object convert(Object value) { return !(Boolean) value; } }; DataBindingContext bindingContext = new DataBindingContext(); bindingContext.bindValue(WidgetProperties.visible().observe(selectionComposite), BeanProperties.value("selectionVisible").observe(model)); bindingContext.bindValue(WidgetProperties.visible().observe(noSelectionComposite), BeanProperties.value("selectionVisible").observe(model), null, notConverter); bindingContext.bindValue(SWTObservables.observeText(txtName, SWT.Modify), BeanProperties.value("pvName").observe(model)); bindingContext.bindValue(SWTObservables.observeText(txtAddress, SWT.Modify), BeanProperties.value("pvAddress").observe(model)); bindingContext.bindValue(ViewersObservables.observeSingleSelection(cmboMode), BeanProperties.value("pvMode").observe(model)); } }