Java tutorial
/* * ALMA - Atacama Large Millimeter Array * (c) Universidad Tecnica Federico Santa Maria, 2009 * Copyright by ESO (in the framework of the ALMA collaboration), * All rights reserved * * 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 */ package cl.utfsm.acs.acg.gui; import java.util.ArrayList; import java.util.Collections; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.dialogs.ErrorDialog; import org.eclipse.jface.dialogs.IInputValidator; import org.eclipse.jface.dialogs.InputDialog; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.SashForm; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.List; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.MessageBox; import org.eclipse.swt.widgets.Text; import org.eclipse.swt.widgets.Button; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.part.ViewPart; import cern.laser.business.data.Source; import cl.utfsm.acs.acg.core.AlarmSystemManager; import cl.utfsm.acs.acg.core.IllegalOperationException; import cl.utfsm.acs.acg.core.SourceManager; public class SourcesView extends ViewPart implements IMyViewPart { public static String ID = "cl.utfsm.acs.acg.gui.sourcesview"; private SourceManager _sourceManager; /* High level widgets */ private SashForm _sash; private Composite _sourcesComp; private Composite _compInitial; /* Left side widgets */ private List _sourcesList; private Composite _sourcesButtonsComp; private Button _addSourceButton; private Button _deleteSourceButton; private Group _listGroup; /* Source information */ private Label _sourceNameLabel; private Label _descriptionLabel; private Text _sourceNameText; private Text _descriptionText; private Label _errorMessageLabel; private Group _group; @Override public void createPartControl(Composite parent) { setTitleToolTip("Configuration of Sources.\nFault Families are published into Sources"); setTitleImage(Activator.getDefault().getImageRegistry().get(Activator.IMG_SOURCE)); createViewWidgets(parent); refreshContents(); } /* (non-Javadoc) * @see cl.utfsm.acs.acg.gui.IMyViewPart#refreshContents() */ public void refreshContents() { _sourcesList.removeAll(); _sourceManager = AlarmSystemManager.getInstance().getSourceManager(); Source[] sources = _sourceManager.getAllSources(); java.util.List<String> sortedSources = new ArrayList<String>(); for (Source src : sources) { sortedSources.add(src.getDescription()); } Collections.sort(sortedSources); for (String src : sortedSources) { _sourcesList.add(src); } } private void createViewWidgets(final Composite parent) { _sash = new SashForm(parent, SWT.HORIZONTAL); _sash.setLayout(new FillLayout()); /* Left pane */ _sourcesComp = new Composite(_sash, SWT.NONE); GridLayout layout = new GridLayout(); layout.numColumns = 1; _sourcesComp.setLayout(layout); _listGroup = new Group(_sourcesComp, SWT.SHADOW_ETCHED_IN); GridData gd = new GridData(); gd.horizontalAlignment = SWT.FILL; gd.verticalAlignment = SWT.FILL; gd.grabExcessHorizontalSpace = true; gd.grabExcessVerticalSpace = true; _listGroup.setLayoutData(gd); GridLayout gl = new GridLayout(); gl.numColumns = 1; _listGroup.setLayout(gl); _listGroup.setText("Sources List"); _sourcesList = new List(_listGroup, SWT.BORDER); gd = new GridData(); gd.verticalAlignment = SWT.FILL; gd.horizontalAlignment = SWT.FILL; gd.grabExcessVerticalSpace = true; gd.grabExcessHorizontalSpace = true; _sourcesList.setLayoutData(gd); _sourcesButtonsComp = new Composite(_sourcesComp, SWT.NONE); layout = new GridLayout(); layout.numColumns = 2; _sourcesButtonsComp.setLayout(layout); _addSourceButton = new Button(_sourcesButtonsComp, SWT.None); _addSourceButton.setText("Add"); _addSourceButton.setImage(PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJ_ADD)); _deleteSourceButton = new Button(_sourcesButtonsComp, SWT.None); _deleteSourceButton.setText("Delete"); _deleteSourceButton .setImage(PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_ETOOL_DELETE)); /* Please change this in the future when more SOURCES will be available */ _addSourceButton.setEnabled(false); _deleteSourceButton.setEnabled(false); _sourcesList.addSelectionListener(new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { widgetSelected(e); } public void widgetSelected(SelectionEvent e) { String source = _sourcesList.getSelection()[0]; Control c = _compInitial.getChildren()[0]; if (c instanceof Label) { c.dispose(); _group.setVisible(true); _group.layout(); } fillSource(source); _compInitial.layout(); } }); _addSourceButton.addListener(SWT.Selection, new Listener() { public void handleEvent(Event event) { InputDialog dialog = new InputDialog(SourcesView.this.getViewSite().getShell(), "New source", "Enter the source name", null, new IInputValidator() { public String isValid(String newText) { if (newText.trim().compareTo("") == 0) return "The name is empty"; return null; } }); dialog.setBlockOnOpen(true); dialog.open(); int returnCode = dialog.getReturnCode(); if (returnCode == InputDialog.OK) { Source newSource = new Source(); newSource.setSourceId(dialog.getValue()); try { _sourceManager.addSource(newSource); } catch (IllegalOperationException e) { ErrorDialog error = new ErrorDialog(SourcesView.this.getViewSite().getShell(), "Source already exist", "The source " + dialog.getValue() + " already exists in the current configuration", new Status(IStatus.ERROR, "cl.utfsm.acs.acg", e.getMessage()), IStatus.ERROR); error.setBlockOnOpen(true); error.open(); return; } refreshContents(); if (_sourcesList.getItems().length != 0) { int lenght = _sourcesList.getItems().length; lenght -= 1; _sourcesList.select(lenght); _descriptionText.setText(_sourcesList.getItem(lenght).toString()); } } } }); _deleteSourceButton.addListener(SWT.Selection, new Listener() { public void handleEvent(Event event) { boolean choice = MessageDialog.openQuestion(SourcesView.this.getViewSite().getShell(), "Confirmation", "Are you sure you want to delete this Source"); if (choice == true) { String tmp[] = _sourcesList.getSelection(); if (tmp.length == 0) { MessageBox box = new MessageBox(getViewSite().getShell(), SWT.OK | SWT.ICON_ERROR | SWT.APPLICATION_MODAL); box.setText("Empty selection"); box.setMessage("There are no sources selected to be deleted"); box.open(); return; } String source = tmp[0]; try { _sourceManager.deleteSource(_sourceManager.getSource(source)); } catch (IllegalOperationException e) { ErrorDialog error = new ErrorDialog(SourcesView.this.getViewSite().getShell(), "Cannot delete source", "The source cannot be deleted", new Status(IStatus.ERROR, "cl.utfsm.acs.acg", e.getMessage()), IStatus.ERROR); error.setBlockOnOpen(true); error.open(); } refreshContents(); if (_sourcesList.getItems().length != 0) { int lenght = _sourcesList.getItems().length; lenght -= 1; _sourcesList.select(lenght); _sourceNameText.setText(_sourcesList.getItem(lenght).toString()); } } } }); /* Right pane */ _compInitial = new Composite(_sash, SWT.NONE); _compInitial.setLayout(new GridLayout()); new Label(_compInitial, SWT.NONE).setText("Select a source"); layout = new GridLayout(); layout.numColumns = 2; gd = new GridData(); gd.horizontalAlignment = SWT.FILL; gd.verticalAlignment = SWT.FILL; gd.grabExcessHorizontalSpace = true; gd.grabExcessVerticalSpace = true; _group = new Group(_compInitial, SWT.SHADOW_ETCHED_IN); _group.setText("Source information"); _group.setLayout(layout); _group.setLayoutData(gd); _sourceNameLabel = new Label(_group, SWT.NONE); _sourceNameLabel.setText("Source name"); _sourceNameText = new Text(_group, SWT.BORDER); _descriptionLabel = new Label(_group, SWT.NONE); _descriptionLabel.setText("Description"); _descriptionText = new Text(_group, SWT.BORDER); gd = new GridData(); gd.horizontalAlignment = SWT.FILL; gd.grabExcessHorizontalSpace = true; _sourceNameText.setLayoutData(gd); _descriptionText.setLayoutData(gd); _group.setVisible(false); _sash.setWeights(new int[] { 3, 5 }); /* TODO: This is temporal, since there is currently only * one source defined in the AS, and it's hardcoded */ //setEnabled(false); _descriptionText.addListener(SWT.Modify, new Listener() { public void handleEvent(Event e) { updateSource(); } }); _errorMessageLabel = new Label(_group, SWT.NONE); _errorMessageLabel.setText(""); _errorMessageLabel.setForeground(getViewSite().getShell().getDisplay().getSystemColor(SWT.COLOR_RED)); gd = new GridData(); gd.grabExcessHorizontalSpace = true; gd.horizontalAlignment = SWT.FILL; gd.horizontalSpan = 2; _errorMessageLabel.setLayoutData(gd); /* Please change this in the future when more SOURCES will be available */ _sourceNameText.setEnabled(false); _descriptionText.setEnabled(false); } public void updateSource() { Source[] sources = _sourceManager.getAllSources(); String tmp[] = _sourcesList.getSelection(); for (int i = 0; i < sources.length; i++) { if (sources[i].getName().compareTo(tmp[0].toString()) == 0) { sources[i].setSourceId(_sourceNameText.getText()); } } refreshContents(); for (int i = 0; i < sources.length; i++) { if (sources[i].getName().compareTo(_sourceNameText.getText()) == 0) { _sourcesList.setSelection(i); } } //_sourceManager.saveToCDB(); } @Override public void setFocus() { } public void setEnabled(boolean v) { /* Left side widgets */ _sourcesList.setEnabled(v); _sourcesButtonsComp.setEnabled(v); //Commented widgets should be uncommented when multiple Sources are available. //_addSourceButton.setEnabled(v); //_deleteSourceButton.setEnabled(v); /* Source information */ //_sourceNameText.setEnabled(v); } private void fillSource(String name) { Source[] sources = _sourceManager.getAllSources(); Source source = null; for (int i = 0; i < sources.length; i++) { if (sources[i].getDescription().compareTo(name) == 0) source = sources[i]; } // This shouldn't happen anyways... if (source == null) return; // sourceName is the NC name TODO: _sourceNameText.setText(source.getName()); // description is the name of the source _descriptionText.setText(source.getDescription()); } public void fillWidgets() { // TODO Auto-generated method stub String[] tmp = _sourcesList.getSelection(); if (tmp == null || tmp.length == 0) return; fillSource(tmp[0]); } public void setReadOnly(boolean v) { _sourcesButtonsComp.setEnabled(!v); _sourceNameText.setEnabled(!v); _descriptionText.setEnabled(!v); } }