Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2011 Thomas Holland (thomas@innot.de) and others. * 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 * * Contributors: * Thomas Holland - initial API and implementation *******************************************************************************/ package de.innot.avreclipse.ui.dialogs; import java.text.MessageFormat; import java.util.Arrays; import java.util.Set; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.dialogs.TitleAreaDialog; 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.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import de.innot.avreclipse.core.toolinfo.fuses.ByteValues; import de.innot.avreclipse.core.toolinfo.fuses.Fuses; import de.innot.avreclipse.core.util.AVRMCUidConverter; /** * Dialog to select a MCU. * <p> * The dialog offers the list of MCUs to the user. If the MCU selected by the user is not compatible * with the MCU given to the dialog at instantiation time then a warning is shown and the OK button * changes to "Convert". * </p> * * @author Thomas Holland * @since 2.3 * */ public class ChangeMCUDialog extends TitleAreaDialog { /** The current ByteValues to check the compatibility with the selected MCU. */ private final ByteValues fSourceValues; /** The name of the file for the dialog title. */ private final String fFileName; /** Stores the id of the selected MCU. */ private String fNewMCU; // The GUI elements private Combo fMCUCombo; private Button fOKButton; private final static int OK_ID = IDialogConstants.OK_ID; private final static int CANCEL_ID = IDialogConstants.CANCEL_ID; private final static String TEXT_OK = IDialogConstants.OK_LABEL; private final static String TEXT_CONVERT = "Convert"; /** * Create a new MCU change dialog. * <p> * The dialog is not shown until {@link #open()} is called. * </p> * * @param shell * <code>Shell</code> to associate this Dialog with, so that it always stays on top * of the given Shell. * @param sourcevalues * A source <code>ByteValues</code> object. Used to preselect the current MCU and * to test the compatibility with the selected MCU. * @param filename * The name of the source file which will appear in the dialog title. */ public ChangeMCUDialog(Shell shell, ByteValues sourcevalues, String filename) { super(shell); fSourceValues = sourcevalues; fNewMCU = sourcevalues.getMCUId(); fFileName = filename; } /* * (non-Javadoc) * * @see org.eclipse.jface.dialogs.TitleAreaDialog#createDialogArea(org.eclipse.swt.widgets.Composite) */ @Override protected Control createDialogArea(Composite parent) { String title = MessageFormat.format("Change MCU for file {0}", fFileName); setTitle(title); // create the top level composite for the dialog area Composite composite = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; layout.verticalSpacing = 0; layout.horizontalSpacing = 0; composite.setLayout(layout); composite.setLayoutData(new GridData(GridData.FILL_BOTH)); composite.setFont(parent.getFont()); // Build a separator line. This is just eye candy. Label titleBarSeparator = new Label(composite, SWT.HORIZONTAL | SWT.SEPARATOR); titleBarSeparator.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 1, 1)); // The real content Composite body = new Composite(composite, SWT.NONE); body.setLayout(new GridLayout(2, false)); Label label = new Label(body, SWT.NONE); label.setText("Select new MCU:"); Set<String> allmcusset = getMCUList(); final String[] allmcuids = allmcusset.toArray(new String[allmcusset.size()]); Arrays.sort(allmcuids); final String[] allmcunames = new String[allmcuids.length]; int oldmcuindex = -1; for (int i = 0; i < allmcuids.length; i++) { allmcunames[i] = AVRMCUidConverter.id2name(allmcuids[i]); if (fSourceValues.getMCUId().equals(allmcuids[i])) { oldmcuindex = i; } } fMCUCombo = new Combo(body, SWT.READ_ONLY); fMCUCombo.setItems(allmcunames); fMCUCombo.setVisibleItemCount(Math.min(allmcunames.length, 25)); fMCUCombo.select(oldmcuindex); fMCUCombo.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { fNewMCU = allmcuids[fMCUCombo.getSelectionIndex()]; boolean isCompatible = fSourceValues.isCompatibleWith(fNewMCU); fOKButton.setText(isCompatible ? TEXT_OK : TEXT_CONVERT); if (!isCompatible) { setMessage("Selected MCU is not compatible with current MCU.", IMessageProvider.WARNING); } else { setMessage(null); } } }); return composite; } /* * (non-Javadoc) * * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite) */ @Override protected void createButtonsForButtonBar(Composite parent) { // create OK and Cancel buttons by default fOKButton = createButton(parent, OK_ID, IDialogConstants.OK_LABEL, true); createButton(parent, CANCEL_ID, IDialogConstants.CANCEL_LABEL, false); } /** * @return The MCU selected by the user. */ public String getResult() { return fNewMCU; } /** * Get a set with all supported MCU id values. * <p> * The default implementation will get the list from the <code>Fuses</code> class. Subclasses * may use a different supplier. * </p> * * @return <code>Set</code> with all MCUs that should be shown to the user. */ protected Set<String> getMCUList() { return Fuses.getDefault().getMCUList(); } }