Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2007 Boeing. * 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: * Boeing - initial API and implementation *******************************************************************************/ package com.hydra.project.myplugin_nebula.xviewer.util.internal.dialog; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.eclipse.jface.dialogs.MessageDialog; import com.hydra.project.myplugin_nebula.xviewer.XViewerText; import com.hydra.project.myplugin_nebula.xviewer.util.internal.XViewerTextWidget; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.events.MouseMoveListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.Image; 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.Shell; /** * @author Donald G. Dunne */ public class DialogWithEntry extends MessageDialog { XViewerTextWidget text; Composite comp; String entryText = ""; //$NON-NLS-1$ String validationRegularExpression = null; String validationErrorString = ""; //$NON-NLS-1$ Button ok; MouseMoveListener listener; Label errorLabel; boolean fillVertically = false; private static Font font = null; private Button fontButton; public DialogWithEntry(String dialogTitle, String dialogMessage) { super(Display.getCurrent().getActiveShell(), dialogTitle, null, dialogMessage, MessageDialog.QUESTION, new String[] { XViewerText.get("button.ok"), XViewerText.get("button.cancel") }, 0); //$NON-NLS-1$ //$NON-NLS-2$ } public DialogWithEntry(Shell parentShell, String dialogTitle, Image dialogTitleImage, String dialogMessage, int dialogImageType, String[] dialogButtonLabels, int defaultIndex) { super(parentShell, dialogTitle, dialogTitleImage, dialogMessage, dialogImageType, dialogButtonLabels, defaultIndex); } @Override protected Control createCustomArea(Composite parent) { comp = new Composite(parent, SWT.NONE); comp.setLayout(new GridLayout(2, false)); comp.setLayoutData(new GridData(GridData.FILL_BOTH | GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL)); listener = new MouseMoveListener() { @Override public void mouseMove(MouseEvent e) { setInitialButtonState(); } }; comp.addMouseMoveListener(listener); Composite headerComp = new Composite(comp, SWT.NONE); headerComp.setLayout(new GridLayout(3, false)); GridData gd = new GridData(GridData.FILL_HORIZONTAL); gd.horizontalSpan = 2; headerComp.setLayoutData(gd); if (fillVertically) { // Create error label Button button = new Button(headerComp, SWT.PUSH); button.setText(XViewerText.get("button.clear")); //$NON-NLS-1$ button.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { super.widgetSelected(e); text.setText(""); //$NON-NLS-1$ } }); // Create error label fontButton = new Button(headerComp, SWT.CHECK); fontButton.setText(XViewerText.get("DialogWithEntry.button.font")); //$NON-NLS-1$ fontButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { super.widgetSelected(e); if (fontButton.getSelection()) { if (font == null) { font = new Font(Display.getCurrent(), "Courier New", 8, SWT.NORMAL); //$NON-NLS-1$ } text.setFont(font); } else { text.setFont(null); } } }); } // Create error label errorLabel = new Label(headerComp, SWT.NONE); errorLabel.setSize(errorLabel.computeSize(SWT.DEFAULT, SWT.DEFAULT)); errorLabel.setText(""); //$NON-NLS-1$ if (!fillVertically) { gd = new GridData(); gd.horizontalSpan = 3; errorLabel.setLayoutData(gd); } createExtendedAreaPre(comp); text = new XViewerTextWidget(); text.setFillHorizontally(true); text.setFocus(); text.setDisplayLabel(false); if (fillVertically) { text.setFillVertically(true); text.setHeight(200); text.setFont(font); } text.createWidgets(comp, 2); if (!entryText.equals("")) { //$NON-NLS-1$ text.set(entryText); } ModifyListener modifyListener = new ModifyListener() { @Override public void modifyText(ModifyEvent e) { handleModified(); } }; text.addModifyListener(modifyListener); createExtendedArea(comp); comp.layout(); parent.layout(); return comp; } /** * Override to provide other widgets before entry */ protected void createExtendedAreaPre(Composite parent) { // provided for subclass implementation } @Override protected boolean isResizable() { return true; } /** * Override to provide other widgets */ protected void createExtendedArea(Composite parent) { // provided for subclass implementation } public void setInitialButtonState() { if (ok == null) { ok = getButton(0); handleModified(); } comp.removeMouseMoveListener(listener); } public void handleModified() { if (text != null) { entryText = text.get(); if (!isEntryValid()) { getButton(getDefaultButtonIndex()).setEnabled(false); errorLabel.setText(validationErrorString); errorLabel.update(); comp.layout(); } else { getButton(getDefaultButtonIndex()).setEnabled(true); errorLabel.setText(""); //$NON-NLS-1$ errorLabel.update(); comp.layout(); } } } public String getEntry() { return entryText; } public void setEntry(String entry) { if (text != null) { text.set(entry); } this.entryText = entry; } /** * override this method to make own checks on entry this will be called with every keystroke * * @return true if entry is valid */ public boolean isEntryValid() { if (validationRegularExpression == null) { return true; } // verify title is alpha-numeric with spaces and dashes Matcher m = Pattern.compile(validationRegularExpression).matcher(text.get()); return m.find(); } public void setValidationRegularExpression(String regExp) { validationRegularExpression = regExp; } public void setValidationErrorString(String errorText) { validationErrorString = errorText; } /** * Calling will enable dialog to loose focus */ public void setModeless() { setShellStyle(SWT.DIALOG_TRIM | SWT.MODELESS); setBlockOnOpen(false); } public void setSelectionListener(SelectionListener listener) { for (int i = 0; i < getButtonLabels().length; i++) { Button button = getButton(i); button.addSelectionListener(listener); } } public boolean isFillVertically() { return fillVertically; } public void setFillVertically(boolean fillVertically) { this.fillVertically = fillVertically; } }