Java tutorial
/******************************************************************************* * Copyright (c) 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 ******************************************************************************/ package org.eclipse.ui.internal.views.markers; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; 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.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.preferences.ViewSettingsDialog; /** * @since 3.7 * @author Hitesh Soliwal * @noextend This class is not intended to be subclassed by clients. */ public abstract class ViewerSettingsAndStatusDialog extends ViewSettingsDialog { private Label imageLabel; /** The message area */ private Text messageArea; private Composite msgParent; /** * @param parentShell */ public ViewerSettingsAndStatusDialog(Shell parentShell) { super(parentShell); } /* * (non-Javadoc) * * @see * org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets * .Shell) */ protected void configureShell(Shell newShell) { super.configureShell(newShell); } /* * (non-Javadoc) * * @see org.eclipse.jface.window.Window#getShellStyle() */ protected int getShellStyle() { return super.getShellStyle() | SWT.RESIZE; } /* * (non-Javadoc) * * @see org.eclipse.jface.dialogs.Dialog#getInitialSize() */ protected Point getInitialSize() { Point size = super.getInitialSize(); size.y += convertHeightInCharsToPixels(3); return size; } protected Control createDialogArea(Composite parent) { Composite dialogArea = (Composite) super.createDialogArea(parent); dialogArea.setLayout(new GridLayout(1, true)); initializeDialogUnits(dialogArea); createMessageArea(dialogArea).setLayoutData(new GridData(SWT.FILL, SWT.NONE, true, false)); createDialogContentArea(dialogArea).setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); applyDialogFont(dialogArea); initializeDialog(); return dialogArea; } /** * @param dialogArea */ protected abstract Control createDialogContentArea(Composite dialogArea); /** * */ protected void initializeDialog() { handleStatusUdpate(IStatus.INFO, getDefaultMessage()); } /** * Create message area. * * @param parent */ Control createMessageArea(Composite parent) { msgParent = new Composite(parent, SWT.BORDER); msgParent.setBackground(getMessageBackground()); msgParent.setLayout(new GridLayout(2, false)); imageLabel = new Label(msgParent, SWT.NONE); imageLabel.setBackground(msgParent.getBackground()); imageLabel.setImage(JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_INFO)); imageLabel.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false)); messageArea = new Text(msgParent, SWT.READ_ONLY | SWT.NONE | SWT.WRAP | SWT.MULTI | SWT.V_SCROLL); messageArea.setEditable(false); messageArea.setBackground(msgParent.getBackground()); messageArea.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); return msgParent; } /** * Display the message and an appropriate icon. * * @param status */ protected void handleStatusUdpate(IStatus status) { handleStatusUdpate(status.getSeverity(), status.getMessage()); } /** * Display the message and an appropriate icon. * * @param messgage * @param severity */ protected void handleStatusUdpate(int severity, String messgage) { Image image = null; Button okBttn = getButton(OK); switch (severity) { case IStatus.ERROR: { if (messgage == null) { messgage = getErrorMessage(); } image = getErrorImage(); break; } case IStatus.WARNING: { image = getWarningImage(); break; } case IStatus.OK: case IStatus.INFO: default: image = getInfoImage(); } if (messgage == null) { messgage = getDefaultMessage(); } if (messgage.equals(MarkerSupportInternalUtilities.EMPTY_STRING)) { handleMessageAreaVisibility(false); image = null; } else { handleMessageAreaVisibility(true); } if (okBttn != null) { okBttn.setEnabled(severity == IStatus.OK || severity == IStatus.INFO || severity == IStatus.WARNING); } if (msgParent != null) { setMessageImage(image); setMessageText(messgage); msgParent.layout(); } } /** * @param image */ protected void setMessageImage(Image image) { if (imageLabel != null) { imageLabel.setImage(image); } } /** * @param messgage */ protected void setMessageText(String messgage) { if (messageArea != null) { messageArea.setText(messgage); } } /** * */ protected Image getMessageImage() { if (imageLabel != null) { imageLabel.getImage(); } return null; } /** */ protected String getMessageText() { if (messageArea != null) { return messageArea.getText(); } return null; } /** * * @param visible */ protected void handleMessageAreaVisibility(boolean visible) { if (msgParent == null || msgParent.isDisposed()) { return; } GridData data = (GridData) msgParent.getLayoutData(); if (data.exclude == visible) { data.exclude = !visible; msgParent.setVisible(visible); msgParent.getParent().layout(); } } /** * Return the Color to display when dialog is opened. */ protected Color getMessageBackground() { return getShell().getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND); } /** * Return the message to display when dialog is opened. */ protected String getDefaultMessage() { return MarkerSupportInternalUtilities.EMPTY_STRING; } /** * @return Returns the error message to display for a wrong limit value. */ protected String getErrorMessage() { return JFaceResources.getString("StringFieldEditor.errorMessage"); //$NON-NLS-1$ } /** */ protected Image getInfoImage() { return JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_INFO); } /** */ protected Image getWarningImage() { return JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_WARNING); } /** */ protected Image getErrorImage() { return JFaceResources.getImage(Dialog.DLG_IMG_MESSAGE_ERROR); } protected void performDefaults() { super.performDefaults(); } protected boolean isResizable() { return true; } protected void okPressed() { super.okPressed(); } }