/*******************************************************************************
* Copyright (c) 2000, 2015 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.ide;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.PartInitException;
/**
* Utility class to help with dialogs.
* <p>
* Note that a copy of this class exists in the
* org.eclipse.ui.internal package.
* </p>
*/
public class DialogUtil {
/**
* Prevent instantiation.
*/
private DialogUtil() {
}
/**
* Open an error style dialog for PartInitException by
* including any extra information from the nested
* CoreException if present.
*/
public static void openError(Shell parent, String title, String message,
PartInitException exception) {
// Check for a nested CoreException
CoreException nestedException = null;
IStatus status = exception.getStatus();
if (status != null && status.getException() instanceof CoreException) {
nestedException = (CoreException) status.getException();
}
if (nestedException != null) {
// Open an error dialog and include the extra
// status information from the nested CoreException
ErrorDialog.openError(parent, title, message, nestedException
.getStatus());
} else {
// Open a regular error dialog since there is no
// extra information to display. Don't use SWT.SHEET because
// we don't know if the title contains important information.
MessageDialog.openError(parent, title, message);
}
}
/**
* Return the number of rows available in the current display using the
* current font.
* @param parent The Composite whose Font will be queried.
* @return int The result of the display size divided by the font size.
*/
public static int availableRows(Composite parent) {
int fontHeight = (parent.getFont().getFontData())[0].getHeight();
int displayHeight = parent.getDisplay().getClientArea().height;
return displayHeight / fontHeight;
}
/**
* Return whether or not the font in the parent is the size of a regular
* font. Typically used to know if a font is smaller than the High Contrast
* Font. This method is used to make layout decisions based on screen space.
*
* @param parent The Composite whose Font will be queried.
* @return boolean. True if there are more than 50 lines of possible
* text in the display.
*/
public static boolean inRegularFontMode(Composite parent) {
return availableRows(parent) > 50;
}
}