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// $Id$
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/**
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* Copyright (C) 2015 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.taxeditor.view;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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import org.eclipse.core.commands.ExecutionEvent;
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import org.eclipse.core.runtime.CoreException;
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import org.eclipse.core.runtime.IConfigurationElement;
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import org.eclipse.core.runtime.IExtensionRegistry;
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import org.eclipse.core.runtime.IStatus;
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import org.eclipse.core.runtime.Platform;
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import org.eclipse.core.runtime.Status;
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import org.eclipse.jface.dialogs.PopupDialog;
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import org.eclipse.jface.viewers.ArrayContentProvider;
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import org.eclipse.jface.viewers.ILabelProvider;
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import org.eclipse.jface.viewers.ILabelProviderListener;
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import org.eclipse.jface.viewers.ISelection;
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import org.eclipse.jface.viewers.ISelectionChangedListener;
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import org.eclipse.jface.viewers.IStructuredSelection;
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import org.eclipse.jface.viewers.SelectionChangedEvent;
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import org.eclipse.jface.viewers.TableViewer;
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import org.eclipse.swt.SWT;
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import org.eclipse.swt.graphics.Image;
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import org.eclipse.swt.widgets.Composite;
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import org.eclipse.swt.widgets.Control;
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import org.eclipse.swt.widgets.Shell;
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import org.eclipse.swt.widgets.Table;
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import eu.etaxonomy.taxeditor.model.MessagingUtils;
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import eu.etaxonomy.taxeditor.store.internal.TaxeditorStorePlugin;
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/**
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* This class provides the possibility to choose from a list of possible viewers
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* which can be opened for a given input in a popup dialog.
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*
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* @author pplitzner
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* @date Feb 23, 2015
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*
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*/
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public class CdmViewerChooser extends PopupDialog implements ISelectionChangedListener, ILabelProvider{
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private Object input;
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private Map<Entry<Class<?>, String>, ICdmViewer> nameViewerMap;
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private ExecutionEvent executionEvent;
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public CdmViewerChooser(Shell parentShell) {
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this(parentShell, SWT.RESIZE | SWT.ON_TOP, true, false, false, false, false, "Open in ...",
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"Clicking will open the selected viewer");
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}
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public CdmViewerChooser(Shell parent, int shellStyle, boolean takeFocusOnOpen, boolean persistSize,
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boolean persistLocation, boolean showDialogMenu, boolean showPersistActions, String titleText,
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String infoText) {
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super(parent, shellStyle, takeFocusOnOpen, persistSize, persistLocation, showDialogMenu, showPersistActions,
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titleText, infoText);
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}
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/**
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* Opens a popup dialog with all possible viewers for the given input.
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* @param input the input for which the viewers are listed
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* @param event the {@link ExecutionEvent} if invoked via command/handler
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*/
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public void chooseViewer(Object input, ExecutionEvent event){
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this.input = input;
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this.executionEvent = event;
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this.nameViewerMap = new HashMap<Entry<Class<?>, String>, ICdmViewer>();
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IExtensionRegistry reg = Platform.getExtensionRegistry();
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IConfigurationElement[] extensions = reg
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.getConfigurationElementsFor("eu.etaxonomy.taxeditor.store.cdmViewer");
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for (IConfigurationElement configElement : extensions) {
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try {
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Object object = configElement.createExecutableExtension("class");
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if(object instanceof ICdmViewer){
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ICdmViewer cdmViewer = (ICdmViewer)object;
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Map<Class<?>, String> viewerClasses = cdmViewer.getViewerClasses(input);
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for (Entry<Class<?>, String> entry : viewerClasses.entrySet()) {
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nameViewerMap.put(entry, cdmViewer);
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}
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}
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else{
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MessagingUtils.error(CdmViewerChooser.class, new Status(IStatus.ERROR, TaxeditorStorePlugin.PLUGIN_ID, "Could not load cdmViewer extension"));
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}
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} catch (CoreException e) {
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MessagingUtils.error(CdmViewerChooser.class, "Could not load cdmViewer extension", e);
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}
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}
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//if only one editor is available then open it
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if(nameViewerMap.size()==1){
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Entry<Class<?>, String> next = nameViewerMap.keySet().iterator().next();
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ICdmViewer cdmViewer = nameViewerMap.get(next);
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cdmViewer.show(input, next.getKey(), event);
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}
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else{
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if(nameViewerMap.isEmpty()){
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this.setInfoText("No viewers registered for this input");
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}
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this.open();
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}
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets.Composite)
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*/
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@Override
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protected Control createDialogArea(Composite parent) {
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TableViewer viewer = new TableViewer(new Table(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.FULL_SELECTION));
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viewer.setContentProvider(new ArrayContentProvider());
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viewer.setLabelProvider(this);
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viewer.addSelectionChangedListener(this);
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viewer.setInput(nameViewerMap.keySet());
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return parent;
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent)
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*/
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@Override
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public void selectionChanged(SelectionChangedEvent event) {
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ISelection selection = event.getSelection();
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if(selection instanceof IStructuredSelection){
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Object firstElement = ((IStructuredSelection) selection).getFirstElement();
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if(nameViewerMap.containsKey(firstElement)){
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Entry<Class<?>, String> entry = (Entry<Class<?>, String>)firstElement;
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ICdmViewer cdmViewer = nameViewerMap.get(entry);
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cdmViewer.show(input, entry.getKey(), this.executionEvent);
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this.close();
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}
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}
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.ILabelProvider#getText(java.lang.Object)
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*/
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@Override
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public String getText(Object element) {
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String text = null;
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if(nameViewerMap.containsKey(element)){
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Entry<Class<?>, String> entry = (Entry<Class<?>, String>) element;
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text = entry.getValue();
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}
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return text;
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(org.eclipse.jface.viewers.ILabelProviderListener)
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*/
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@Override
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public void addListener(ILabelProviderListener listener) {
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// TODO Auto-generated method stub
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.IBaseLabelProvider#dispose()
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*/
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@Override
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public void dispose() {
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// TODO Auto-generated method stub
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(java.lang.Object, java.lang.String)
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*/
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@Override
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public boolean isLabelProperty(Object element, String property) {
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// TODO Auto-generated method stub
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return false;
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(org.eclipse.jface.viewers.ILabelProviderListener)
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*/
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@Override
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public void removeListener(ILabelProviderListener listener) {
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// TODO Auto-generated method stub
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}
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/* (non-Javadoc)
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* @see org.eclipse.jface.viewers.ILabelProvider#getImage(java.lang.Object)
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*/
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@Override
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public Image getImage(Object element) {
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// TODO Auto-generated method stub
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return null;
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}
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}
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