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 * Mike Morearty - Bug 271411 *******************************************************************************/ package org.eclipse.debug.internal.ui.actions.expressions; import org.eclipse.debug.core.model.IWatchExpression; import org.eclipse.debug.internal.ui.IDebugHelpContextIds; import org.eclipse.debug.internal.ui.actions.ActionMessages; import org.eclipse.debug.internal.ui.actions.StatusInfo; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.bindings.keys.IKeyLookup; import org.eclipse.jface.bindings.keys.KeyLookupFactory; import org.eclipse.jface.bindings.keys.KeySequence; import org.eclipse.jface.bindings.keys.KeyStroke; import org.eclipse.jface.bindings.keys.SWTKeySupport; import org.eclipse.jface.dialogs.StatusDialog; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.text.Document; import org.eclipse.jface.text.DocumentEvent; import org.eclipse.jface.text.IDocument; import org.eclipse.jface.text.IDocumentListener; import org.eclipse.jface.text.ITextOperationTarget; import org.eclipse.jface.text.source.SourceViewer; import org.eclipse.jface.text.source.SourceViewerConfiguration; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Font; 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.Menu; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.console.actions.TextViewerAction; import com.ibm.icu.text.MessageFormat; /** * Dialog for edit watch expression. */ public class WatchExpressionDialog extends StatusDialog { /** * The detail formatter to edit. */ private IWatchExpression fWatchExpression; // widgets private SourceViewer fSnippetViewer; private Button fCheckBox; private Label fTip; public WatchExpressionDialog(Shell parent, IWatchExpression watchExpression, boolean editDialog) { super(parent); fWatchExpression = watchExpression; setShellStyle(getShellStyle() | SWT.MAX | SWT.RESIZE); String helpContextId = null; if (editDialog) { setTitle(ActionMessages.WatchExpressionDialog_0); helpContextId = IDebugHelpContextIds.EDIT_WATCH_EXPRESSION_DIALOG; } else { setTitle(ActionMessages.WatchExpressionDialog_1); helpContextId = IDebugHelpContextIds.ADD_WATCH_EXPRESSION_DIALOG; } PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, helpContextId); } /** * Create the dialog area. * * @see org.eclipse.jface.dialogs.Dialog#createDialogArea(Composite) */ protected Control createDialogArea(Composite parent) { Font font = parent.getFont(); Composite container = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); container.setLayout(layout); GridData gd = new GridData(GridData.FILL_BOTH); container.setLayoutData(gd); // snippet label Label label = new Label(container, SWT.NONE); label.setText(ActionMessages.WatchExpressionDialog_2); gd = new GridData(GridData.BEGINNING); label.setLayoutData(gd); label.setFont(font); fSnippetViewer = new SourceViewer(container, null, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL | SWT.LEFT_TO_RIGHT); fSnippetViewer.setInput(this); IDocument document = new Document(); fSnippetViewer.configure(new SourceViewerConfiguration()); fSnippetViewer.setEditable(true); fSnippetViewer.setDocument(document); document.addDocumentListener(new IDocumentListener() { public void documentAboutToBeChanged(DocumentEvent event) { } public void documentChanged(DocumentEvent event) { checkValues(); } }); fSnippetViewer.getTextWidget().setFont(JFaceResources.getTextFont()); Control control = fSnippetViewer.getControl(); gd = new GridData(GridData.FILL_BOTH); gd.heightHint = convertHeightInCharsToPixels(10); gd.widthHint = convertWidthInCharsToPixels(80); control.setLayoutData(gd); fSnippetViewer.getDocument().set(fWatchExpression.getExpressionText()); // actions final TextViewerAction cutAction = new TextViewerAction(fSnippetViewer, ITextOperationTarget.CUT); cutAction.setImageDescriptor( PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_TOOL_CUT)); cutAction.setDisabledImageDescriptor(PlatformUI.getWorkbench().getSharedImages() .getImageDescriptor(ISharedImages.IMG_TOOL_CUT_DISABLED)); cutAction.setText(ActionMessages.WatchExpressionDialogMenu_0); final TextViewerAction copyAction = new TextViewerAction(fSnippetViewer, ITextOperationTarget.COPY); copyAction.setImageDescriptor( PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_TOOL_COPY)); copyAction.setDisabledImageDescriptor(PlatformUI.getWorkbench().getSharedImages() .getImageDescriptor(ISharedImages.IMG_TOOL_COPY_DISABLED)); copyAction.setText(ActionMessages.WatchExpressionDialogMenu_1); final TextViewerAction pasteAction = new TextViewerAction(fSnippetViewer, ITextOperationTarget.PASTE); pasteAction.setImageDescriptor( PlatformUI.getWorkbench().getSharedImages().getImageDescriptor(ISharedImages.IMG_TOOL_PASTE)); pasteAction.setDisabledImageDescriptor(PlatformUI.getWorkbench().getSharedImages() .getImageDescriptor(ISharedImages.IMG_TOOL_PASTE_DISABLED)); pasteAction.setText(ActionMessages.WatchExpressionDialogMenu_2); // context menu MenuManager menuManager = new MenuManager(); menuManager.add(cutAction); menuManager.add(copyAction); menuManager.add(pasteAction); menuManager.addMenuListener(new IMenuListener() { public void menuAboutToShow(IMenuManager manager) { cutAction.update(); copyAction.update(); pasteAction.update(); } }); Menu menu = menuManager.createContextMenu(fSnippetViewer.getTextWidget()); fSnippetViewer.getTextWidget().setMenu(menu); // enable checkbox fCheckBox = new Button(container, SWT.CHECK | SWT.LEFT); fCheckBox.setText(ActionMessages.WatchExpressionDialog_3); fCheckBox.setSelection(fWatchExpression.isEnabled()); fCheckBox.setFont(font); String tipText = MessageFormat.format(ActionMessages.WatchExpressionDialog_5, new String[] { getCtrlReturnText() }); fTip = new Label(container, SWT.LEFT); fTip.setText(tipText); fTip.setFont(font); applyDialogFont(container); fSnippetViewer.getControl().setFocus(); return container; } /** * Returns a string representation of the "Ctrl+Return" key sequence. * * @return a string representation of the "Ctrl+Return" key sequence. */ private String getCtrlReturnText() { IKeyLookup keyLookup = KeyLookupFactory.getDefault(); int ctrlKey = keyLookup.getCtrl(); int returnKey = keyLookup.formalKeyLookup(IKeyLookup.RETURN_NAME); KeyStroke ctrlReturnKeyStroke = KeyStroke.getInstance(ctrlKey, returnKey); KeySequence ctrltReturnKeySequence = KeySequence.getInstance(ctrlReturnKeyStroke); return SWTKeySupport.getKeyFormatterForPlatform().format(ctrltReturnKeySequence); } /** * @see org.eclipse.jface.dialogs.Dialog#okPressed() */ protected void okPressed() { fWatchExpression.setEnabled(fCheckBox.getSelection()); fWatchExpression.setExpressionText(fSnippetViewer.getDocument().get()); super.okPressed(); } /** * Check the field values and display a message in the status if needed. */ private void checkValues() { StatusInfo status = new StatusInfo(); if (fSnippetViewer.getDocument().get().trim().length() == 0) { status.setError(ActionMessages.WatchExpressionDialog_4); } updateStatus(status); } }