Java tutorial
//* Licensed Materials - Property of IBM, Miracle A/S, and * //* Alexandra Instituttet A/S * //* eu.abc4trust.pabce.1.14 * //* (C) Copyright IBM Corp. 2012. All Rights Reserved. * //* (C) Copyright Miracle A/S, Denmark. 2012. All Rights Reserved. * //* (C) Copyright Alexandra Instituttet A/S, Denmark. 2012. All * //* Rights Reserved. * //* US Government Users Restricted Rights - Use, duplication or * //* disclosure restricted by GSA ADP Schedule Contract with IBM Corp. * //* * //* This file is licensed under the Apache License, Version 2.0 (the * //* "License"); you may not use this file except in compliance with * //* the License. You may obtain a copy of the License at: * //* http://www.apache.org/licenses/LICENSE-2.0 * //* Unless required by applicable law or agreed to in writing, * //* software distributed under the License is distributed on an * //* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * //* KIND, either express or implied. See the License for the * //* specific language governing permissions and limitations * //* under the License. * //*/**/**************************************************************** package eu.abc4trust.ri.ui.user.view; import java.net.MalformedURLException; import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Calendar; import java.util.HashSet; import java.util.List; import java.util.Set; import javax.xml.bind.DatatypeConverter; import javax.xml.datatype.DatatypeConstants; import org.eclipse.jface.resource.ImageDescriptor; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.ScrolledComposite; import org.eclipse.swt.graphics.Device; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.layout.FormLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.ISelectionListener; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.part.ViewPart; import eu.abc4trust.returnTypes.ui.CredentialInUi; import eu.abc4trust.ri.ui.user.utils.Messages; import eu.abc4trust.ri.ui.user.utils.ResourceRegistryStore; import eu.abc4trust.ri.ui.user.utils.UIUtil; import eu.abc4trust.xml.Attribute; public class CredentialAttributesView extends ViewPart implements ISelectionListener { public static final String ID = "eu.abc4trust.ui.user.view.credentialattributes"; //$NON-NLS-1$ public static final String DATE_FORMAT = "dd-MM-yyyy"; private CredentialInUi currentCredential; private Set<Image> imagesToDispose = new HashSet<Image>(); private Composite partControlParent; private Composite viewContent; private Label defaultLabel; private Control focusElement; public CredentialAttributesView() { super(); partControlParent = null; viewContent = null; currentCredential = null; } public void createPartControl(Composite parent) { //setPartName("Credential Attributes"); partControlParent = parent; viewContent = createDefaultContent(partControlParent); getSite().getWorkbenchWindow().getSelectionService().addPostSelectionListener(this); } public void selectionChanged(IWorkbenchPart part, ISelection incoming) { if (incoming instanceof IStructuredSelection) { IStructuredSelection selection = (IStructuredSelection) incoming; if (selection.size() == 1) { Object o = selection.getFirstElement(); if (o instanceof CredentialInUi) { currentCredential = (CredentialInUi) o; updateOutlineContent(); return; } } if (selection.size() == 0) { currentCredential = null; updateOutlineContent(); return; } } } public void setFocus() { if (focusElement != null) { // should never be null (as long as the current credential has attributes) focusElement.setFocus(); } } public void dispose() { getSite().getWorkbenchWindow().getSelectionService().removePostSelectionListener(this); super.dispose(); for (Image i : imagesToDispose) { i.dispose(); } } public void updateOutlineContent() { viewContent.dispose(); if (currentCredential != null) { viewContent = createContent(partControlParent); } else { viewContent = createDefaultContent(partControlParent); } partControlParent.layout(true, true); } private Composite createDefaultContent(Composite parent) { Composite content = new Composite(parent, SWT.NONE); FormLayout formLayout = new FormLayout(); formLayout.marginHeight = 3; formLayout.marginWidth = 3; content.setLayout(formLayout); defaultLabel = new Label(content, SWT.NONE); defaultLabel.setText(Messages.get().CredentialAttributesView_msg_credentialSelectionPrompt); FormData formData = new FormData(); formData.left = new FormAttachment(0); formData.right = new FormAttachment(100); formData.top = new FormAttachment(0); formData.bottom = new FormAttachment(100); defaultLabel.setLayoutData(formData); focusElement = defaultLabel; return content; } private Composite createContent(Composite parent) { int firstColumWidth = 300; // TODO calculate dynamically by the widest column ScrolledComposite scrolledContent = new ScrolledComposite(parent, SWT.H_SCROLL | SWT.V_SCROLL); Composite content = new Composite(scrolledContent, SWT.NONE); FormLayout formLayout = new FormLayout(); formLayout.marginHeight = 5; formLayout.marginWidth = 5; formLayout.spacing = 5; content.setLayout(formLayout); scrolledContent.setContent(content); scrolledContent.setExpandVertical(false); scrolledContent.setExpandHorizontal(false); Label imageLabel = new Label(content, SWT.NONE); Image image = null; try { // image = ResourceRegistryStore.getThumbnail(currentCredential.desc.getImageReference().toURL(), 200); image = ImageDescriptor.createFromURL(currentCredential.desc.getImageReference().toURL()).createImage(); if (image != null && image.getBounds().width > 150) { ImageData scaledImage = image.internalImage.getImageData().scaledTo(150, 150); Device device = parent.getDisplay(); image = new Image(device, scaledImage); } imagesToDispose.add(image); imageLabel.setImage(image); } catch (MalformedURLException e) { e.printStackTrace(); } FormData formData = new FormData(SWT.DEFAULT, SWT.DEFAULT); formData.left = new FormAttachment(0); formData.top = new FormAttachment(0); imageLabel.setLayoutData(formData); Text typeLabel = new Text(content, SWT.SINGLE | SWT.READ_ONLY); typeLabel.setText(Messages.get().CredentialAttributesView_credentialType + ":"); //$NON-NLS-1$ Text typeText = new Text(content, SWT.SINGLE | SWT.READ_ONLY); String credSpecUID = currentCredential.desc.getCredentialSpecificationUID().toString(); String humanReadableCredSpecName = UIUtil .getHumanReadable(currentCredential.spec.spec.getFriendlyCredentialName()); typeText.setText(humanReadableCredSpecName + " (" + credSpecUID + ")"); formData = new FormData(firstColumWidth, SWT.DEFAULT); // width: 180 formData.left = new FormAttachment(0); formData.top = new FormAttachment(typeText, 0, SWT.CENTER); typeLabel.setLayoutData(formData); formData = new FormData(SWT.DEFAULT, SWT.DEFAULT); formData.left = new FormAttachment(typeLabel); formData.top = new FormAttachment(imageLabel); typeText.setLayoutData(formData); typeText.setBackground(typeLabel.getBackground()); Text issuerLabel = new Text(content, SWT.SINGLE | SWT.READ_ONLY); issuerLabel.setText(Messages.get().CredentialAttributesView_issuer + ":"); //$NON-NLS-1$ Text issuerText = new Text(content, SWT.SINGLE | SWT.READ_ONLY); String issuerUID = currentCredential.desc.getIssuerParametersUID().toString(); String humanReadableIssuerName = UIUtil.getHumanReadable(currentCredential.issuer.description); issuerText.setText(humanReadableIssuerName + " (" + issuerUID + ")"); issuerText.setBackground(issuerLabel.getBackground()); formData = new FormData(firstColumWidth, SWT.DEFAULT); // width: 180 formData.left = new FormAttachment(0); formData.top = new FormAttachment(issuerText, 0, SWT.CENTER); issuerLabel.setLayoutData(formData); formData = new FormData(SWT.DEFAULT, SWT.DEFAULT); formData.left = new FormAttachment(issuerLabel); formData.top = new FormAttachment(typeText); issuerText.setLayoutData(formData); Text revocationLabel = new Text(content, SWT.SINGLE | SWT.READ_ONLY); revocationLabel.setText(Messages.get().CredentialAttributesView_revokedByIssuer + ":"); //$NON-NLS-1$ Label revocationCheckboxOrText = new Label(content, SWT.NONE); if (currentCredential.spec.spec.isRevocable()) { // Show checkbox if the credential is revocable final boolean state = currentCredential.desc.isRevokedByIssuer(); revocationCheckboxOrText .setImage(ResourceRegistryStore.getImage(state ? ResourceRegistryStore.IMG_CHECKBOX_SELECTED : ResourceRegistryStore.IMG_CHECKBOX_UNSELECTED)); // This is a workaround as disabled checkboxes are very light grey and almost invisible. } else { // Inform the user that the credential is not revocable revocationCheckboxOrText.setText(Messages.get().CredentialAttributesView_msg_notRevocable); } formData = new FormData(firstColumWidth, SWT.DEFAULT); // width: 180 formData.left = new FormAttachment(0); formData.top = new FormAttachment(revocationCheckboxOrText, 0, SWT.CENTER); revocationLabel.setLayoutData(formData); formData = new FormData(SWT.DEFAULT, SWT.DEFAULT); formData.left = new FormAttachment(revocationLabel, 9); formData.top = new FormAttachment(issuerText); revocationCheckboxOrText.setLayoutData(formData); // Create a label and appropriate further controls (text field, date element, // checkbox, etc.) for every attribute of the current credential List<Control> valueControls = new ArrayList<Control>(); for (Attribute attribute : currentCredential.desc.getAttribute()) { Control valueControl = null; // Create the control already now for layouting the label correctly ////////////////////////////////////////////// // Label showing the attribute name String attributeType = attribute.getAttributeDescription().getType().toString(); String fallback; if (attributeType.equals("http://abc4trust.eu/wp2/abcschemav1.0/revocationhandle")) { //$NON-NLS-1$ fallback = Messages.get().CredentialAttributesView_revocationHandle; } else { fallback = attributeType; } Text label = new Text(content, SWT.SINGLE | SWT.READ_ONLY); label.setText(UIUtil.getHumanReadable(attribute.getAttributeDescription().getFriendlyAttributeName(), fallback) + ":"); //$NON-NLS-1$ ////////////////////////////////////////////// // Control (text field, date element, checkbox, etc.) showing the attribute value // TODO: properly support data types with different control types // URI dataType = attribute.getAttributeDescription().getDataType(); // if (dataType.equals(Date.class)) { // // Attribute is a date // Date d = (Date) currentCredential.getAttributeValue(attributeName); // Calendar c = new GregorianCalendar(); // try { // Date origin = Translator.DATE_FORMAT.parse(Constants.DATE_ORIGIN); // c.setTime(origin); // c.add(Calendar.YEAR, 1); // } catch (ParseException e) { // e.printStackTrace(); // } // // valueControl = new Text(content, SWT.SINGLE | SWT.READ_ONLY); // if(c.getTime().after(d)) { // ((Text)valueControl).setText("None"); // } else { // SimpleDateFormat df = new SimpleDateFormat("EEEE, d MMMM yyyy 'at' HH:mm z"); // ((Text)valueControl).setText(df.format(d)); // } // // valueControl.setBackground(label.getBackground()); // // } else if (dataType.equals(Boolean.class)) { // // Attribute is a boolean value // final boolean state = ((Boolean)currentCredential.getAttributeValue(attributeName)).booleanValue(); // valueControl = new Button(content, SWT.CHECK); // valueControl.setBackground(label.getBackground()); // ((Button)valueControl).setSelection(state); // ((Button)valueControl).addSelectionListener(new SelectionAdapter() { // @Override // // This is a workaround as "valueControl.setEnabled(false)" results // // in a very light grey checkbox that is almost invisible. // public void widgetSelected(SelectionEvent e) { // // e.doit = false; // does not work... // Button checkBox = ((Button) e.widget); // checkBox.setSelection(state); // } // }); // // } else { // Attribute value is represented as text. valueControl = new Text(content, SWT.SINGLE | SWT.READ_ONLY); String textValue; String attributeDataType = attribute.getAttributeDescription().getDataType().toString().substring(3); if (attributeDataType.equals(DatatypeConstants.DATE.getLocalPart())) { Calendar c = DatatypeConverter.parseDate(attribute.getAttributeValue().toString()); textValue = new SimpleDateFormat(DATE_FORMAT).format(c.getTime()); } else { textValue = attribute.getAttributeValue().toString(); } ((Text) valueControl).setText(textValue); valueControl.setBackground(label.getBackground()); // } ////////////////////////////////////////////// // Lay out the controls formData = new FormData(firstColumWidth, SWT.DEFAULT); // width: 180 formData.left = new FormAttachment(0); formData.top = new FormAttachment(valueControl, 0, SWT.CENTER); label.setLayoutData(formData); formData = new FormData(); formData.left = new FormAttachment(label); if (valueControls.isEmpty()) { formData.top = new FormAttachment(revocationLabel); } else { // Attach the top of the valueControl to the bottom of the one above formData.top = new FormAttachment(valueControls.get(valueControls.size() - 1)); } valueControl.setLayoutData(formData); // Remember the control to lay out subsequent ones right below it valueControls.add(valueControl); } /////////////////////////////////////////////////////////////////////// // Make the scrollbars work Point size = scrolledContent.getContent().computeSize(SWT.DEFAULT, SWT.DEFAULT); scrolledContent.getContent().setSize(size); scrolledContent.setMinSize(size); //scrolledContent.layout(true, true); focusElement = typeText; return scrolledContent; } }