Java tutorial
/*---------------- FILE HEADER KALYPSO ------------------------------------------ * * This file is part of kalypso. * Copyright (C) 2004 by: * * Technical University Hamburg-Harburg (TUHH) * Institute of River and coastal engineering * Denickestrae 22 * 21073 Hamburg, Germany * http://www.tuhh.de/wb * * and * * Bjoernsen Consulting Engineers (BCE) * Maria Trost 3 * 56070 Koblenz, Germany * http://www.bjoernsen.de * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Contact: * * E-Mail: * belger@bjoernsen.de * schlienger@bjoernsen.de * v.doemming@tuhh.de * * ---------------------------------------------------------------------------*/ package org.kalypso.commons.databinding.swt; import org.eclipse.core.databinding.Binding; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IFile; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.Assert; import org.eclipse.core.runtime.IPath; import org.eclipse.jface.databinding.swt.ISWTObservableValue; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.databinding.viewers.ViewersObservables; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.ViewerFilter; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import org.kalypso.commons.databinding.DataBinder; import org.kalypso.commons.databinding.IDataBinding; import org.kalypso.commons.databinding.conversion.PathToStringConverter; import org.kalypso.commons.databinding.conversion.StringToPathConverter; import org.kalypso.commons.internal.i18n.Messages; import org.kalypso.contribs.eclipse.core.runtime.PathUtils; import org.kalypso.contribs.eclipse.ui.dialogs.KalypsoResourceSelectionDialog; import org.kalypso.contribs.eclipse.ui.dialogs.ResourceSelectionValidator; /** * @author Gernot Belger */ public class WorkspaceFileBinding { private final IDataBinding m_binding; private final IObservableValue m_fileValue; private final String m_dialogMessage; private final String[] m_filterExtensions; private IContainer m_inputContainer; private ViewerFilter m_filter; private final WorkbenchFileValidator m_fileValidator = new WorkbenchFileValidator(); private Binding m_fileBinding; public WorkspaceFileBinding(final IDataBinding binding, final IObservableValue fileValue, final String dialogMessage, final String[] filterExtensions) { this(binding, fileValue, dialogMessage, filterExtensions, false); } public WorkspaceFileBinding(final IDataBinding binding, final IObservableValue fileValue, final String dialogMessage, final String[] filterExtensions, final boolean isOptional) { m_binding = binding; m_fileValue = fileValue; m_dialogMessage = dialogMessage; m_filterExtensions = filterExtensions; m_fileValidator.setIsOptional(isOptional); } /** * Set to <code>true</code>, if the selected path may be empty (i.e. if choosing the file is optional). */ public void setIsOptional(final boolean isOptional) { m_fileValidator.setIsOptional(isOptional); } public void setInputContainer(final IContainer inputContainer) { m_inputContainer = inputContainer; } public void setFilter(final ViewerFilter filter) { m_filter = filter; } /** * @param historyValue * The value representing the history of directories. Must be of type String[]. */ public Control createFileFieldWithHistory(final Composite parent, final IObservableValue historyValue) { Assert.isTrue(historyValue.getValueType() == String[].class); final ComboViewer viewer = new ComboViewer(parent, SWT.SINGLE | SWT.BORDER | SWT.DROP_DOWN); viewer.getControl().setFont(parent.getFont()); viewer.setContentProvider(new ArrayContentProvider()); viewer.setLabelProvider(new LabelProvider()); final IObservableValue targetInput = ViewersObservables.observeInput(viewer); m_binding.bindValue(targetInput, historyValue); final ISWTObservableValue targetText = SWTObservables.observeText(viewer.getControl()); final DataBinder binder = new DataBinder(targetText, m_fileValue); binder.setModelToTargetConverter(new PathToStringConverter()); binder.setTargetToModelConverter(new StringToPathConverter()); binder.addTargetAfterConvertValidator(m_fileValidator); m_fileBinding = m_binding.bindValue(binder); return viewer.getControl(); } public Button createFileSearchButton(final Composite parent) { final Button browseButton = new Button(parent, SWT.PUSH); browseButton.setText(Messages.getString("WorkspaceFileBinding_0")); //$NON-NLS-1$ browseButton.setFont(parent.getFont()); browseButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { handleBrowseButtonSelected(parent.getShell()); } }); return browseButton; } protected void handleBrowseButtonSelected(final Shell shell) { final IFile currentFile = PathUtils.toFile((IPath) m_fileValue.getValue()); final IContainer inputContainer = getInputContainer(); final KalypsoResourceSelectionDialog dialog = new KalypsoResourceSelectionDialog(shell, currentFile, m_dialogMessage, m_filterExtensions, inputContainer, new ResourceSelectionValidator()); //$NON-NLS-1$ if (m_filter != null) dialog.setViewerFilter(m_filter); dialog.open(); final Object[] result = dialog.getResult(); if (result == null || result.length != 1) return; final IPath newPath = (IPath) result[0]; m_fileValue.setValue(newPath); } private IContainer getInputContainer() { if (m_inputContainer == null) return ResourcesPlugin.getWorkspace().getRoot(); return m_inputContainer; } public Binding getFileBinding() { return m_fileBinding; } }