org.eclipse.nebula.widgets.nattable.core/src/org/eclipse/nebula/widgets/nattable/ui/ExceptionDialog.java - nattable/org.eclipse.nebula.widgets.nattable - Git at Google

 /*******************************************************************************
  * Copyright (c) 2016 Dirk Fauth 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:
  *     Dirk Fauth <dirk.fauth@googlemail.com> - initial API and implementation
  ******************************************************************************/
 package org.eclipse.nebula.widgets.nattable.ui;

 import java.io.IOException;
 import java.io.PrintWriter;
 import java.io.StringWriter;

 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.eclipse.jface.dialogs.Dialog;
 import org.eclipse.jface.dialogs.IDialogConstants;
 import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.swt.SWT;
 import org.eclipse.swt.graphics.Image;
 import org.eclipse.swt.graphics.Point;
 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.Label;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.swt.widgets.Text;

 /**
  * Dialog that can be used to show an error with an additional stacktrace.
  *
  * @since 1.5
  */
 public class ExceptionDialog extends Dialog {

     private static final Log LOG = LogFactory.getLog(ExceptionDialog.class);

     private String title;
     private String message;
     private Exception exception;

     private Button detailsButton;
     private Text exceptionText;

     private boolean exceptionAreaCreated = false;

     protected ExceptionDialog(Shell parentShell, String title, String message, Exception exception) {
         super(parentShell);

         this.title = title;
         this.message = message != null ? message : exception.getLocalizedMessage();
         this.exception = exception;
     }

     @Override
     protected Control createDialogArea(Composite parent) {
         Composite composite = new Composite(parent, SWT.NONE);
         GridLayout layout = new GridLayout();
         layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
         layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
         layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
         layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
         layout.numColumns = 2;
         composite.setLayout(layout);
         GridDataFactory.fillDefaults().grab(true, false).applyTo(composite);
         createMessageArea(composite);

         return composite;
     }

     protected Control createMessageArea(Composite composite) {
         // create composite
         // create image
         Image image = getParentShell().getDisplay().getSystemImage(SWT.ICON_ERROR);
         Label imageLabel = new Label(composite, SWT.NULL);
         image.setBackground(imageLabel.getBackground());
         imageLabel.setImage(image);
         GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.BEGINNING).applyTo(imageLabel);

         // create message
         if (this.message != null) {
             Label messageLabel = new Label(composite, SWT.WRAP);
             messageLabel.setText(this.message);
             GridDataFactory
                     .fillDefaults()
                     .align(SWT.FILL, SWT.CENTER)
                     .grab(true, false)
                     .hint(convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH), SWT.DEFAULT)
                     .applyTo(messageLabel);
         }

         return composite;
     }

     @Override
     protected void createButtonsForButtonBar(Composite parent) {
         // create OK and Details buttons
         createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
         if (this.exception != null) {
             this.detailsButton = createButton(parent, IDialogConstants.DETAILS_ID, IDialogConstants.SHOW_DETAILS_LABEL, false);
         }
     }

     @Override
     protected void buttonPressed(int id) {
         if (id == IDialogConstants.DETAILS_ID) {
             // was the details button pressed?
             toggleDetailsArea();
         } else {
             super.buttonPressed(id);
         }
     }

     private void toggleDetailsArea() {
         boolean opened = false;
         Point windowSize = getShell().getSize();
         if (this.exceptionAreaCreated) {
             this.exceptionText.dispose();
             this.exceptionAreaCreated = false;
             this.detailsButton.setText(IDialogConstants.SHOW_DETAILS_LABEL);
             opened = false;
         } else {
             this.exceptionText = createExceptionText((Composite) getContents());
             this.detailsButton.setText(IDialogConstants.HIDE_DETAILS_LABEL);
             getContents().getShell().layout();
             opened = true;
         }
         Point newSize = getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT);
         int diffY = newSize.y - windowSize.y;
         // increase the dialog height if details were opened and such increase
         // is necessary
         // decrease the dialog height if details were closed and empty space
         // appeared
         if ((opened && diffY > 0) || (!opened && diffY < 0)) {
             getShell().setSize(new Point(windowSize.x, windowSize.y + (diffY)));
         }
     }

     private Text createExceptionText(Composite parent) {
         Text exceptionText = new Text(parent, SWT.MULTI | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
         GridDataFactory
                 .fillDefaults()
                 .grab(true, true)
                 .span(2, 1)
                 .applyTo(exceptionText);

         StringWriter sw = new StringWriter();
         PrintWriter pw = new PrintWriter(sw);
         try {
             this.exception.printStackTrace(pw);
             exceptionText.setText(sw.toString());
         } finally {
             try {
                 sw.close();
                 pw.close();
             } catch (IOException e) {
                 LOG.error("Closing stream failed", e); //$NON-NLS-1$
             }
         }
         this.exceptionAreaCreated = true;
         return exceptionText;
     }

     /**
      * Opens an error dialog to display the given error.
      *
      * @param parentShell
      *            the parent shell of the dialog, or <code>null</code> if none
      * @param title
      *            the title to use for this dialog, or <code>null</code> to
      *            indicate that the default title should be used
      * @param exception
      *            the error to show to the user
      * @return the code of the button that was pressed that resulted in this
      *         dialog closing. This will be <code>Dialog.OK</code> if the OK
      *         button was pressed, or <code>Dialog.CANCEL</code> if this
      *         dialog's close window decoration or the ESC key was used.
      */
     public static int open(Shell parentShell, String title, Exception exception) {
         return open(parentShell, title, exception.getLocalizedMessage(), exception);
     }

     /**
      * Opens an error dialog to display the given error.
      *
      * @param parentShell
      *            the parent shell of the dialog, or <code>null</code> if none
      * @param title
      *            the title to use for this dialog, or <code>null</code> to
      *            indicate that the default title should be used
      * @param message
      *            the message to show in this dialog, or <code>null</code> to
      *            indicate that the error's message should be shown as the
      *            primary message
      * @param exception
      *            the error to show to the user
      * @return the code of the button that was pressed that resulted in this
      *         dialog closing. This will be <code>Dialog.OK</code> if the OK
      *         button was pressed, or <code>Dialog.CANCEL</code> if this
      *         dialog's close window decoration or the ESC key was used.
      */
     public static int open(Shell parentShell, String title, String message, Exception exception) {
         ExceptionDialog dialog = new ExceptionDialog(parentShell, title, message, exception);
         return dialog.open();
     }

     @Override
     protected boolean isResizable() {
         return true;
     }

     @Override
     protected void configureShell(Shell newShell) {
         super.configureShell(newShell);
         newShell.setText(this.title);
         newShell.setImage(getParentShell().getDisplay().getSystemImage(SWT.ICON_ERROR));
     }
 }
	/*******************************************************************************
	* Copyright (c) 2016 Dirk Fauth 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:
	* Dirk Fauth <dirk.fauth@googlemail.com> - initial API and implementation
	******************************************************************************/
	package org.eclipse.nebula.widgets.nattable.ui;

	import java.io.IOException;
	import java.io.PrintWriter;
	import java.io.StringWriter;

	import org.apache.commons.logging.Log;
	import org.apache.commons.logging.LogFactory;
	import org.eclipse.jface.dialogs.Dialog;
	import org.eclipse.jface.dialogs.IDialogConstants;
	import org.eclipse.jface.layout.GridDataFactory;
	import org.eclipse.swt.SWT;
	import org.eclipse.swt.graphics.Image;
	import org.eclipse.swt.graphics.Point;
	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.Label;
	import org.eclipse.swt.widgets.Shell;
	import org.eclipse.swt.widgets.Text;

	/**
	* Dialog that can be used to show an error with an additional stacktrace.
	*
	* @since 1.5
	*/
	public class ExceptionDialog extends Dialog {

	private static final Log LOG = LogFactory.getLog(ExceptionDialog.class);

	private String title;
	private String message;
	private Exception exception;

	private Button detailsButton;
	private Text exceptionText;

	private boolean exceptionAreaCreated = false;

	protected ExceptionDialog(Shell parentShell, String title, String message, Exception exception) {
	super(parentShell);

	this.title = title;
	this.message = message != null ? message : exception.getLocalizedMessage();
	this.exception = exception;
	}

	@Override
	protected Control createDialogArea(Composite parent) {
	Composite composite = new Composite(parent, SWT.NONE);
	GridLayout layout = new GridLayout();
	layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN);
	layout.marginWidth = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_MARGIN);
	layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
	layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
	layout.numColumns = 2;
	composite.setLayout(layout);
	GridDataFactory.fillDefaults().grab(true, false).applyTo(composite);
	createMessageArea(composite);

	return composite;
	}

	protected Control createMessageArea(Composite composite) {
	// create composite
	// create image
	Image image = getParentShell().getDisplay().getSystemImage(SWT.ICON_ERROR);
	Label imageLabel = new Label(composite, SWT.NULL);
	image.setBackground(imageLabel.getBackground());
	imageLabel.setImage(image);
	GridDataFactory.fillDefaults().align(SWT.CENTER, SWT.BEGINNING).applyTo(imageLabel);

	// create message
	if (this.message != null) {
	Label messageLabel = new Label(composite, SWT.WRAP);
	messageLabel.setText(this.message);
	GridDataFactory
	.fillDefaults()
	.align(SWT.FILL, SWT.CENTER)
	.grab(true, false)
	.hint(convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH), SWT.DEFAULT)
	.applyTo(messageLabel);
	}

	return composite;
	}

	@Override
	protected void createButtonsForButtonBar(Composite parent) {
	// create OK and Details buttons
	createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true);
	if (this.exception != null) {
	this.detailsButton = createButton(parent, IDialogConstants.DETAILS_ID, IDialogConstants.SHOW_DETAILS_LABEL, false);
	}
	}

	@Override
	protected void buttonPressed(int id) {
	if (id == IDialogConstants.DETAILS_ID) {
	// was the details button pressed?
	toggleDetailsArea();
	} else {
	super.buttonPressed(id);
	}
	}

	private void toggleDetailsArea() {
	boolean opened = false;
	Point windowSize = getShell().getSize();
	if (this.exceptionAreaCreated) {
	this.exceptionText.dispose();
	this.exceptionAreaCreated = false;
	this.detailsButton.setText(IDialogConstants.SHOW_DETAILS_LABEL);
	opened = false;
	} else {
	this.exceptionText = createExceptionText((Composite) getContents());
	this.detailsButton.setText(IDialogConstants.HIDE_DETAILS_LABEL);
	getContents().getShell().layout();
	opened = true;
	}
	Point newSize = getShell().computeSize(SWT.DEFAULT, SWT.DEFAULT);
	int diffY = newSize.y - windowSize.y;
	// increase the dialog height if details were opened and such increase
	// is necessary
	// decrease the dialog height if details were closed and empty space
	// appeared
	if ((opened && diffY > 0) \|\| (!opened && diffY < 0)) {
	getShell().setSize(new Point(windowSize.x, windowSize.y + (diffY)));
	}
	}

	private Text createExceptionText(Composite parent) {
	Text exceptionText = new Text(parent, SWT.MULTI \| SWT.BORDER \| SWT.V_SCROLL \| SWT.H_SCROLL);
	GridDataFactory
	.fillDefaults()
	.grab(true, true)
	.span(2, 1)
	.applyTo(exceptionText);

	StringWriter sw = new StringWriter();
	PrintWriter pw = new PrintWriter(sw);
	try {
	this.exception.printStackTrace(pw);
	exceptionText.setText(sw.toString());
	} finally {
	try {
	sw.close();
	pw.close();
	} catch (IOException e) {
	LOG.error("Closing stream failed", e); //$NON-NLS-1$
	}
	}
	this.exceptionAreaCreated = true;
	return exceptionText;
	}

	/**
	* Opens an error dialog to display the given error.
	*
	* @param parentShell
	* the parent shell of the dialog, or <code>null</code> if none
	* @param title
	* the title to use for this dialog, or <code>null</code> to
	* indicate that the default title should be used
	* @param exception
	* the error to show to the user
	* @return the code of the button that was pressed that resulted in this
	* dialog closing. This will be <code>Dialog.OK</code> if the OK
	* button was pressed, or <code>Dialog.CANCEL</code> if this
	* dialog's close window decoration or the ESC key was used.
	*/
	public static int open(Shell parentShell, String title, Exception exception) {
	return open(parentShell, title, exception.getLocalizedMessage(), exception);
	}

	/**
	* Opens an error dialog to display the given error.
	*
	* @param parentShell
	* the parent shell of the dialog, or <code>null</code> if none
	* @param title
	* the title to use for this dialog, or <code>null</code> to
	* indicate that the default title should be used
	* @param message
	* the message to show in this dialog, or <code>null</code> to
	* indicate that the error's message should be shown as the
	* primary message
	* @param exception
	* the error to show to the user
	* @return the code of the button that was pressed that resulted in this
	* dialog closing. This will be <code>Dialog.OK</code> if the OK
	* button was pressed, or <code>Dialog.CANCEL</code> if this
	* dialog's close window decoration or the ESC key was used.
	*/
	public static int open(Shell parentShell, String title, String message, Exception exception) {
	ExceptionDialog dialog = new ExceptionDialog(parentShell, title, message, exception);
	return dialog.open();
	}

	@Override
	protected boolean isResizable() {
	return true;
	}

	@Override
	protected void configureShell(Shell newShell) {
	super.configureShell(newShell);
	newShell.setText(this.title);
	newShell.setImage(getParentShell().getDisplay().getSystemImage(SWT.ICON_ERROR));
	}
	}