Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2009 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 *******************************************************************************/ package org.eclipse.ui.internal.part; import java.io.PrintWriter; import java.io.StringWriter; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.FillLayout; 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; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.internal.WorkbenchMessages; import org.eclipse.ui.internal.WorkbenchPlugin; import org.eclipse.ui.statushandlers.StatusManager; import org.eclipse.ui.views.IViewDescriptor; /** * @since 3.1 */ public class StatusPart { private static final String LOG_VIEW_ID = "org.eclipse.pde.runtime.LogView"; //$NON-NLS-1$ boolean showingDetails = false; private Button detailsButton; private Composite detailsArea; private Control details = null; private IStatus reason; public StatusPart(final Composite parent, IStatus reason_) { Color bgColor = parent.getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND); Color fgColor = parent.getDisplay().getSystemColor(SWT.COLOR_LIST_FOREGROUND); parent.setBackground(bgColor); parent.setForeground(fgColor); this.reason = reason_; GridLayout layout = new GridLayout(); layout.numColumns = 3; int spacing = 8; int margins = 8; layout.marginBottom = margins; layout.marginTop = margins; layout.marginLeft = margins; layout.marginRight = margins; layout.horizontalSpacing = spacing; layout.verticalSpacing = spacing; parent.setLayout(layout); Label imageLabel = new Label(parent, SWT.NONE); imageLabel.setBackground(bgColor); Image image = getImage(); if (image != null) { image.setBackground(bgColor); imageLabel.setImage(image); imageLabel.setLayoutData( new GridData(GridData.HORIZONTAL_ALIGN_CENTER | GridData.VERTICAL_ALIGN_BEGINNING)); } Text text = new Text(parent, SWT.MULTI | SWT.READ_ONLY | SWT.WRAP); text.setBackground(bgColor); text.setForeground(fgColor); //text.setForeground(JFaceColors.getErrorText(text.getDisplay())); text.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); text.setText(reason.getMessage()); Composite buttonParent = new Composite(parent, SWT.NONE); buttonParent.setBackground(parent.getBackground()); GridLayout buttonsLayout = new GridLayout(); buttonsLayout.numColumns = 2; buttonsLayout.marginHeight = 0; buttonsLayout.marginWidth = 0; buttonsLayout.horizontalSpacing = 0; buttonParent.setLayout(buttonsLayout); detailsButton = new Button(buttonParent, SWT.PUSH); detailsButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { showDetails(!showingDetails); } }); detailsButton.setLayoutData(new GridData(SWT.BEGINNING, SWT.FILL, false, false)); detailsButton.setVisible(reason.getException() != null); createShowLogButton(buttonParent); updateDetailsText(); detailsArea = new Composite(parent, SWT.NONE); detailsArea.setBackground(bgColor); detailsArea.setForeground(fgColor); GridData data = new GridData(GridData.FILL_BOTH); data.horizontalSpan = 3; data.verticalSpan = 1; detailsArea.setLayoutData(data); detailsArea.setLayout(new FillLayout()); parent.layout(true); } /** * Return the image for the upper-left corner of this part * * @return the image */ private Image getImage() { Display d = Display.getCurrent(); switch (reason.getSeverity()) { case IStatus.ERROR: return d.getSystemImage(SWT.ICON_ERROR); case IStatus.WARNING: return d.getSystemImage(SWT.ICON_WARNING); default: return d.getSystemImage(SWT.ICON_INFORMATION); } } private void showDetails(boolean shouldShow) { if (shouldShow == showingDetails) { return; } this.showingDetails = shouldShow; updateDetailsText(); } private void updateDetailsText() { if (details != null) { details.dispose(); details = null; } if (showingDetails) { detailsButton.setText(IDialogConstants.HIDE_DETAILS_LABEL); Text detailsText = new Text(detailsArea, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL | SWT.MULTI | SWT.READ_ONLY | SWT.LEFT_TO_RIGHT); detailsText.setText(getDetails(reason)); detailsText.setBackground(detailsText.getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND)); details = detailsText; detailsArea.layout(true); } else { detailsButton.setText(IDialogConstants.SHOW_DETAILS_LABEL); } } private String getDetails(IStatus status) { if (status.getException() != null) { return getStackTrace(status.getException()); } return ""; //$NON-NLS-1$ } private String getStackTrace(Throwable throwable) { StringWriter swriter = new StringWriter(); PrintWriter pwriter = new PrintWriter(swriter); throwable.printStackTrace(pwriter); pwriter.flush(); pwriter.close(); return swriter.toString(); } private void createShowLogButton(Composite parent) { IViewDescriptor descriptor = PlatformUI.getWorkbench().getViewRegistry().find(LOG_VIEW_ID); if (descriptor == null) { return; } Button button = new Button(parent, SWT.PUSH); button.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { try { PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView(LOG_VIEW_ID); } catch (CoreException ce) { StatusManager.getManager().handle(ce, WorkbenchPlugin.PI_WORKBENCH); } } }); final Image image = descriptor.getImageDescriptor().createImage(); button.setImage(image); button.setToolTipText(WorkbenchMessages.ErrorLogUtil_ShowErrorLogTooltip); button.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { image.dispose(); } }); } }