Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2008 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.forms.examples.internal.rcp; import java.io.PrintWriter; import java.io.StringWriter; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.FillLayout; 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.Shell; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.ISharedImages; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.forms.HyperlinkSettings; import org.eclipse.ui.forms.IManagedForm; import org.eclipse.ui.forms.IMessage; import org.eclipse.ui.forms.IMessageManager; import org.eclipse.ui.forms.editor.FormEditor; import org.eclipse.ui.forms.editor.FormPage; import org.eclipse.ui.forms.events.HyperlinkAdapter; import org.eclipse.ui.forms.events.HyperlinkEvent; import org.eclipse.ui.forms.widgets.Form; import org.eclipse.ui.forms.widgets.FormText; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.forms.widgets.ScrolledForm; import org.eclipse.ui.forms.widgets.Section; import org.eclipse.ui.forms.widgets.TableWrapLayout; /** * This page shows how to use the message manager to handle errors in a form * page. * * @since 3.3 */ public class ErrorMessagesPage extends FormPage { /* private RichMessageToolTipManager richToolTipMessageManager; class RichToolTip extends ToolTip { private IManagedForm mform; private FormText text; private String content; public RichToolTip(IManagedForm mform, Control control) { super(control); this.mform = mform; setShift(new Point(10, 10)); } protected Composite createToolTipContentArea(Event event, Composite parent) { this.text = mform.getToolkit().createFormText(parent, true); configureFormText(mform.getForm().getForm(), text); update(); return text; } public void update(String content) { if (content == null) { // hide deactivate(); } else { activate(); this.content = content; update(); } } private void update() { if (text != null && text.isDisposed()) text = null; if (text != null) { if (content != null) text.setText(content, true, false); else text.setText("", false, false); } } } class RichMessageToolTipManager implements IMessageToolTipManager { private ArrayList toolTips = new ArrayList(); private IManagedForm mform; public RichMessageToolTipManager(IManagedForm mform) { this.mform = mform; } public void createToolTip(Control control, boolean imageLabel) { ToolTip toolTip = new RichToolTip(mform, control); toolTips.add(toolTip); } public void setActive(boolean active) { for (int i = 0; i < toolTips.size(); i++) { RichToolTip toolTip = (RichToolTip) toolTips.get(i); if (active) toolTip.activate(); else toolTip.deactivate(); } } public void update() { IMessage[] messages = mform.getForm().getForm() .getChildrenMessages(); String content = mform.getForm().getMessage() == null ? null : createFormTextContent(messages); for (int i = 0; i < toolTips.size(); i++) { RichToolTip toolTip = (RichToolTip) toolTips.get(i); toolTip.update(content); } } } */ /** * @param id * @param title */ public ErrorMessagesPage(FormEditor editor) { super(editor, "messageManager", "Message Manager"); } protected void createFormContent(final IManagedForm managedForm) { final ScrolledForm form = managedForm.getForm(); final FormToolkit toolkit = managedForm.getToolkit(); toolkit.getHyperlinkGroup().setHyperlinkUnderlineMode(HyperlinkSettings.UNDERLINE_HOVER); form.setText("Example with message handling"); toolkit.decorateFormHeading(form.getForm()); form.getForm().addMessageHyperlinkListener(new HyperlinkAdapter() { public void linkActivated(HyperlinkEvent e) { String title = e.getLabel(); // String details = title; Object href = e.getHref(); if (href instanceof IMessage[]) { // details = // managedForm.getMessageManager().createSummary((IMessage[])href); } // int type = form.getForm().getMessageType(); /* * switch (type) { case IMessageProvider.NONE: case * IMessageProvider.INFORMATION: * MessageDialog.openInformation(form.getShell(), title, * details); break; case IMessageProvider.WARNING: * MessageDialog.openWarning(form.getShell(), title, details); * break; case IMessageProvider.ERROR: * MessageDialog.openError(form.getShell(), title, details); * break; } */ Point hl = ((Control) e.widget).toDisplay(0, 0); hl.x += 10; hl.y += 10; Shell shell = new Shell(form.getShell(), SWT.ON_TOP | SWT.TOOL); shell.setImage(getImage(form.getMessageType())); shell.setText(title); shell.setLayout(new FillLayout()); // ScrolledFormText stext = new ScrolledFormText(shell, false); // stext.setBackground(toolkit.getColors().getBackground()); FormText text = toolkit.createFormText(shell, true); configureFormText(form.getForm(), text); // stext.setFormText(text); if (href instanceof IMessage[]) text.setText(createFormTextContent((IMessage[]) href), true, false); shell.setLocation(hl); // Point size = shell.computeSize(400, SWT.DEFAULT); /* richToolTipMessageManager.setActive(false); shell.addDisposeListener(new DisposeListener() { public void widgetDisposed(DisposeEvent e) { richToolTipMessageManager.setActive(true); } }); */ shell.pack(); shell.open(); } }); //richToolTipMessageManager = new RichMessageToolTipManager(managedForm); //form.getForm().setMessageToolTipManager(richToolTipMessageManager); final IMessageManager mmng = managedForm.getMessageManager(); TableWrapLayout layout = new TableWrapLayout(); form.getBody().setLayout(layout); Section section = toolkit.createSection(form.getBody(), Section.TITLE_BAR); section.setText("Local field messages"); Composite sbody = toolkit.createComposite(section); section.setClient(sbody); GridLayout glayout = new GridLayout(); glayout.horizontalSpacing = 10; glayout.numColumns = 2; sbody.setLayout(glayout); toolkit.paintBordersFor(sbody); createDecoratedTextField("Field1", toolkit, sbody, mmng); createDecoratedTextField("Field2", toolkit, sbody, mmng); createDecoratedTextField("Field3", toolkit, sbody, mmng); final Button button1 = toolkit.createButton(form.getBody(), "Add general error", SWT.CHECK); button1.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { if (button1.getSelection()) { mmng.addMessage("saveError", "Save Error", null, IMessageProvider.ERROR); } else { mmng.removeMessage("saveError"); } } }); final Button button2 = toolkit.createButton(form.getBody(), "Add static message", SWT.CHECK); button2.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { if (button2.getSelection()) { mmng.addMessage("info", "Secondary info", null, IMessageProvider.NONE); } else { mmng.removeMessage("info"); } } }); final Button button3 = toolkit.createButton(form.getBody(), "Auto update", SWT.CHECK); button3.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { mmng.setAutoUpdate(button3.getSelection()); } }); button3.setSelection(true); } private Image getImage(int type) { switch (type) { case IMessageProvider.ERROR: return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJS_ERROR_TSK); case IMessageProvider.WARNING: return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJS_WARN_TSK); case IMessageProvider.INFORMATION: return PlatformUI.getWorkbench().getSharedImages().getImage(ISharedImages.IMG_OBJS_INFO_TSK); } return null; } private void configureFormText(final Form form, FormText text) { text.addHyperlinkListener(new HyperlinkAdapter() { public void linkActivated(HyperlinkEvent e) { String is = (String) e.getHref(); try { int index = Integer.parseInt(is); IMessage[] messages = form.getChildrenMessages(); IMessage message = messages[index]; Control c = message.getControl(); ((FormText) e.widget).getShell().dispose(); if (c != null) c.setFocus(); } catch (NumberFormatException ex) { } } }); text.setImage("error", getImage(IMessageProvider.ERROR)); text.setImage("warning", getImage(IMessageProvider.WARNING)); text.setImage("info", getImage(IMessageProvider.INFORMATION)); } String createFormTextContent(IMessage[] messages) { StringWriter sw = new StringWriter(); PrintWriter pw = new PrintWriter(sw); pw.println("<form>"); for (int i = 0; i < messages.length; i++) { IMessage message = messages[i]; pw.print("<li vspace=\"false\" style=\"image\" indent=\"16\" value=\""); switch (message.getMessageType()) { case IMessageProvider.ERROR: pw.print("error"); break; case IMessageProvider.WARNING: pw.print("warning"); break; case IMessageProvider.INFORMATION: pw.print("info"); break; } pw.print("\"> <a href=\""); pw.print(i + ""); pw.print("\">"); if (message.getPrefix() != null) pw.print(message.getPrefix()); pw.print(message.getMessage()); pw.println("</a></li>"); } pw.println("</form>"); pw.flush(); return sw.toString(); } private void createDecoratedTextField(String label, FormToolkit toolkit, Composite parent, final IMessageManager mmng) { toolkit.createLabel(parent, label); final Text text = toolkit.createText(parent, ""); GridData gd = new GridData(GridData.FILL_HORIZONTAL); gd.widthHint = 150; text.setLayoutData(gd); text.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { String s = text.getText(); // flag length if (s.length() > 0 && s.length() <= 5) { mmng.addMessage("textLength", "Text is longer than 0 characters", null, IMessageProvider.INFORMATION, text); } else if (s.length() > 5 && s.length() <= 10) { mmng.addMessage("textLength", "Text is longer than 5 characters", null, IMessageProvider.WARNING, text); } else if (s.length() > 10) { mmng.addMessage("textLength", "Text is longer than 10 characters", null, IMessageProvider.ERROR, text); } else { mmng.removeMessage("textLength", text); } // flag type boolean badType = false; for (int i = 0; i < s.length(); i++) { if (!Character.isLetter(s.charAt(i))) { badType = true; break; } } if (badType) { mmng.addMessage("textType", "Text must only contain letters", null, IMessageProvider.ERROR, text); } else { mmng.removeMessage("textType", text); } } }); } }