Java tutorial
/** * This file is protected by Copyright. * Please refer to the COPYRIGHT file distributed with this source distribution. * * This file is part of REDHAWK IDE. * * All rights reserved. This program and the accompanying materials are made available under * the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html. * */ package gov.redhawk.sca.internal.ui.wizards; import java.util.ArrayList; import java.util.List; import mil.jpeojtrs.sca.prf.PropertyValueType; import mil.jpeojtrs.sca.util.AnyUtils; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.CellEditor; import org.eclipse.jface.viewers.CellLabelProvider; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.EditingSupport; import org.eclipse.jface.viewers.ICellEditorValidator; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableLayout; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.TableViewerColumn; import org.eclipse.jface.viewers.TextCellEditor; import org.eclipse.jface.viewers.ViewerCell; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; 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.Control; /** * */ public class ValuesWizardPage extends WizardPage { private static class ClassStringContainer { private String value; public ClassStringContainer(final String value) { this.value = value; } @Override public String toString() { return this.value; } } private TableViewer viewer; private final List<ClassStringContainer> input = new ArrayList<ClassStringContainer>(); private Button upButton; private Button downButton; private Button addButton; private Button removeButton; private final PropertyValueType type; private Boolean complex; /** * @param type * @param pageName * @param title * @param titleImage */ protected ValuesWizardPage(final PropertyValueType type, Boolean complex) { super("valuesPage", "Values", null); this.setDescription("Edit the values."); this.type = type; this.complex = complex; } /** * {@inheritDoc} */ @Override public void createControl(final Composite parent) { final Composite control = new Composite(parent, SWT.None); control.setLayout(new GridLayout(2, false)); Control subControl = createViewer(control); subControl.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1)); subControl = createButtons(control); setControl(control); } /** * @param control */ private Control createButtons(final Composite control) { final Composite parent = new Composite(control, SWT.None); parent.setLayout(new GridLayout(1, false)); this.upButton = new Button(parent, SWT.PUSH); this.upButton.setText("Up"); this.upButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); this.upButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { final ClassStringContainer element = getSelectedElement(); final int index = getSelectionIndex(); ValuesWizardPage.this.input.remove(index); ValuesWizardPage.this.input.add(index - 1, element); updateButton(); ValuesWizardPage.this.viewer.refresh(); } }); this.downButton = new Button(parent, SWT.PUSH); this.downButton.setText("Down"); this.downButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); this.downButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { final ClassStringContainer element = getSelectedElement(); final int index = getSelectionIndex(); ValuesWizardPage.this.input.remove(index); ValuesWizardPage.this.input.add(index + 1, element); updateButton(); ValuesWizardPage.this.viewer.refresh(); } }); this.addButton = new Button(parent, SWT.PUSH); this.addButton.setText("Add"); this.addButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); this.addButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { final ClassStringContainer element = new ClassStringContainer("<Enter Value>"); ValuesWizardPage.this.input.add(element); ValuesWizardPage.this.viewer.refresh(); ValuesWizardPage.this.viewer.getTable().select(ValuesWizardPage.this.input.size() - 1); ValuesWizardPage.this.viewer.editElement(element, 0); } }); this.removeButton = new Button(parent, SWT.PUSH); this.removeButton.setText("Remove"); this.removeButton.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); this.removeButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { final int index = getSelectionIndex(); ValuesWizardPage.this.input.remove(index); ValuesWizardPage.this.viewer.refresh(); } }); updateButton(); return parent; } /** * @return */ protected int getSelectionIndex() { return this.input.indexOf(getSelectedElement()); } private ClassStringContainer getSelectedElement() { return (ClassStringContainer) ((IStructuredSelection) this.viewer.getSelection()).getFirstElement(); } private void updateButton() { final ClassStringContainer element = getSelectedElement(); if (element != null) { final int index = getSelectionIndex(); if (index == 0) { this.upButton.setEnabled(false); } else { this.upButton.setEnabled(true); } if (index + 1 == this.input.size()) { this.downButton.setEnabled(false); } else { this.downButton.setEnabled(true); } this.removeButton.setEnabled(true); } else { this.upButton.setEnabled(false); this.downButton.setEnabled(false); this.removeButton.setEnabled(false); } } /** * @param control */ private Control createViewer(final Composite control) { this.viewer = new TableViewer(control, SWT.FULL_SELECTION | SWT.BORDER | SWT.SINGLE); final TableLayout layout = new TableLayout(); this.viewer.getTable().setLayout(layout); this.viewer.setLabelProvider(new LabelProvider()); this.viewer.setContentProvider(new ArrayContentProvider()); this.viewer.setInput(this.input); this.viewer.getTable().setHeaderVisible(true); final TableViewerColumn valueCol = new TableViewerColumn(this.viewer, SWT.NONE); valueCol.getColumn().setText("Value"); layout.addColumnData(new ColumnWeightData(2, 100, false)); // SUPPRESS CHECKSTYLE MagicNumber valueCol.setLabelProvider(new CellLabelProvider() { @Override public void update(final ViewerCell cell) { cell.setText(cell.getElement().toString()); } }); valueCol.setEditingSupport(new EditingSupport(this.viewer) { @Override protected boolean canEdit(final Object element) { return true; } @Override protected CellEditor getCellEditor(final Object element) { final TextCellEditor editor = new TextCellEditor( (Composite) ValuesWizardPage.this.viewer.getControl()); editor.setValidator(new ICellEditorValidator() { @Override public String isValid(final Object value) { try { AnyUtils.convertString(value.toString(), type.getLiteral(), complex); return null; } catch (final Exception e) { // SUPPRESS CHECKSTYLE Logged Error return e.getMessage(); } } }); return editor; } @Override protected Object getValue(final Object element) { return ((ClassStringContainer) element).value; } @Override protected void setValue(final Object element, final Object value) { ((ClassStringContainer) element).value = value.toString(); ValuesWizardPage.this.viewer.refresh(element); } }); this.viewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(final SelectionChangedEvent event) { updateButton(); } }); return this.viewer.getControl(); } public void setInput(final String[] input) { this.input.clear(); if (input != null) { for (final String str : input) { this.input.add(new ClassStringContainer(str)); } } if (this.viewer != null) { this.viewer.refresh(); } } /** * @return */ public String[] getValues() { final String[] retVal = new String[this.input.size()]; for (int i = 0; i < retVal.length; i++) { final ClassStringContainer cont = this.input.get(i); retVal[i] = cont.value; } return retVal; } }