Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2010 IBM Corporation 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: * IBM Corporation - initial API and implementation * Sebastian Davids <sdavids@gmx.de> - Fix for bug 93353 - * [Dialogs] B3MessageDialog#buttonPressed should explicitly call super * Cloudsmith Inc - modified for use in b3 and renamed from B3MessageDialog *******************************************************************************/ package org.eclipse.b3.build.ui.dialogs; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.PrintStream; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; /** * Added a Details button to the MessageDialog to show the exception * stack trace. */ public class B3MessageDialog extends MessageDialog { public static void openMultiStatusError(Shell parent, String title, String message, IStatus status, int defaultIndex) { String[] labels; if (status == null || status.isOK()) { labels = new String[] { IDialogConstants.OK_LABEL }; defaultIndex = 0; } else { labels = new String[] { IDialogConstants.OK_LABEL, IDialogConstants.SHOW_DETAILS_LABEL }; defaultIndex = 0; } B3MessageDialog dialog = new B3MessageDialog(parent, title, null, // accept the default window icon message, status, MessageDialog.ERROR, labels, defaultIndex); if (status != null && !status.isOK()) { dialog.setDetailButton(1); } dialog.open(); } /** * Convenience method to open a simple Yes/No question dialog. * * @param parent * the parent shell of the dialog, or <code>null</code> if none * @param title * the dialog's title, or <code>null</code> if none * @param message * the message * @param detail * the error * @param defaultIndex * the default index of the button to select * @return <code>true</code> if the user presses the OK button, <code>false</code> otherwise */ public static boolean openQuestion(Shell parent, String title, String message, Throwable detail, int defaultIndex) { String[] labels; if (detail == null) { labels = new String[] { IDialogConstants.YES_LABEL, IDialogConstants.NO_LABEL }; } else { labels = new String[] { IDialogConstants.YES_LABEL, IDialogConstants.NO_LABEL, IDialogConstants.SHOW_DETAILS_LABEL }; } B3MessageDialog dialog = new B3MessageDialog(parent, title, null, // accept the default window icon message, detail, QUESTION, labels, defaultIndex); if (detail != null) { dialog.setDetailButton(2); } return dialog.open() == 0; } /** * Convenience method to open an error dialog with a stack trace * * @param parent * the parent shell of the dialog, or <code>null</code> if none * @param title * the dialog's title, or <code>null</code> if none * @param message * the message * @param detail * the error * @param defaultIndex * the default index of the button to select * @return <code>true</code> if the user presses the OK button, <code>false</code> otherwise */ public static void openStackTrace(Shell parent, String title, String message, Throwable detail, int defaultIndex) { String[] labels; if (detail == null) { labels = new String[] { IDialogConstants.OK_LABEL }; defaultIndex = 0; } else { labels = new String[] { IDialogConstants.OK_LABEL, IDialogConstants.SHOW_DETAILS_LABEL }; defaultIndex = 0; } B3MessageDialog dialog = new B3MessageDialog(parent, title, null, // accept the default window icon message, detail, MessageDialog.ERROR, labels, defaultIndex); if (detail != null) { dialog.setDetailButton(1); } dialog.open(); } private Throwable detail; private IStatus detailedStatus; private int detailButtonID = -1; private Text text; // Workaround. SWT does not seem to set the default button if // there is not control with focus. Bug: 14668 private int defaultButtonIndex = 0; /** * Size of the text in lines. */ private static final int TEXT_LINE_COUNT = 15; public B3MessageDialog(Shell parentShell, String dialogTitle, Image dialogTitleImage, String dialogMessage, IStatus detail, int dialogImageType, String[] dialogButtonLabels, int defaultIndex) { super(parentShell, dialogTitle, dialogTitleImage, dialogMessage, dialogImageType, dialogButtonLabels, defaultIndex); defaultButtonIndex = defaultIndex; this.detail = null; this.detailedStatus = detail; setShellStyle(getShellStyle() | SWT.APPLICATION_MODAL); } /** * Create a new dialog. * * @param parentShell * the parent shell * @param dialogTitle * the title * @param dialogTitleImage * the title image * @param dialogMessage * the message * @param detail * the error to display * @param dialogImageType * the type of image * @param dialogButtonLabels * the button labels * @param defaultIndex * the default selected button index */ public B3MessageDialog(Shell parentShell, String dialogTitle, Image dialogTitleImage, String dialogMessage, Throwable detail, int dialogImageType, String[] dialogButtonLabels, int defaultIndex) { super(parentShell, dialogTitle, dialogTitleImage, dialogMessage, dialogImageType, dialogButtonLabels, defaultIndex); defaultButtonIndex = defaultIndex; this.detail = detail; this.detailedStatus = null; setShellStyle(getShellStyle() | SWT.APPLICATION_MODAL); } // Workaround. SWT does not seem to set rigth the default button if // there is not control with focus. Bug: 14668 @Override public int open() { create(); Button b = getButton(defaultButtonIndex); b.setFocus(); b.getShell().setDefaultButton(b); return super.open(); } /** * Set the detail button; * * @param index * the detail button index */ public void setDetailButton(int index) { detailButtonID = index; } /* * (non-Javadoc) * Method declared on Dialog. */ @Override protected void buttonPressed(int buttonId) { if (buttonId == detailButtonID) { toggleDetailsArea(); } else { super.buttonPressed(buttonId); } } /** * Create this dialog's drop-down list component. * * @param parent * the parent composite */ protected void createDropDownText(Composite parent) { // create the list text = new Text(parent, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL); text.setFont(parent.getFont()); // print the stacktrace in the text field if (this.detail != null) { try { ByteArrayOutputStream baos = new ByteArrayOutputStream(); PrintStream ps = new PrintStream(baos); detail.printStackTrace(ps); ps.flush(); baos.flush(); text.setText(baos.toString()); } catch (IOException e) { } } else { try { ByteArrayOutputStream baos = new ByteArrayOutputStream(); PrintStream ps = new PrintStream(baos); printStatusOnStream(detailedStatus, ps, 0); ps.flush(); baos.flush(); text.setText(baos.toString()); } catch (IOException e) { } } GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL | GridData.VERTICAL_ALIGN_FILL | GridData.GRAB_VERTICAL); data.heightHint = text.getLineHeight() * TEXT_LINE_COUNT; data.horizontalSpan = 2; text.setLayoutData(data); } /* * (non-Javadoc) * * @see org.eclipse.jface.dialogs.Dialog#isResizable() */ @Override protected boolean isResizable() { return true; } private void indent(PrintStream ps, int indentLevel) { for (int i = 0; i < indentLevel * 4; i++) ps.print(' '); } /** * Prints the exception message. * * @param t * @param ps * @param indentLevel */ private void printExceptionOnStream(Throwable t, PrintStream ps, int indentLevel) { if (t == null || t.getMessage() == null) return; indent(ps, indentLevel); ps.println(t.getMessage()); } private void printStatusOnStream(IStatus status, PrintStream ps, int indentLevel) { indent(ps, indentLevel); ps.println(status.getMessage()); if (status.isMultiStatus()) { for (IStatus s : status.getChildren()) printStatusOnStream(s, ps, indentLevel + 1); } else { Throwable t = status.getException(); if (t instanceof CoreException) { printStatusOnStream(((CoreException) t).getStatus(), ps, indentLevel + 1); } else { printExceptionOnStream(t, ps, indentLevel + 1); } } } /** * Toggles the unfolding of the details area. This is triggered by * the user pressing the details button. */ private void toggleDetailsArea() { Point windowSize = getShell().getSize(); Point oldSize = getContents().computeSize(SWT.DEFAULT, SWT.DEFAULT); if (text != null) { text.dispose(); text = null; getButton(detailButtonID).setText(IDialogConstants.SHOW_DETAILS_LABEL); } else { createDropDownText((Composite) getContents()); getButton(detailButtonID).setText(IDialogConstants.HIDE_DETAILS_LABEL); } Point newSize = getContents().computeSize(SWT.DEFAULT, SWT.DEFAULT); getShell().setSize(new Point(windowSize.x, windowSize.y + (newSize.y - oldSize.y))); } }