Java tutorial
/******************************************************************************* * Copyright (c) 2009 the CHISEL group and contributors. 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: the CHISEL group - initial API and implementation *******************************************************************************/ package ca.uvic.chisel.javasketch.ui.internal.search; import java.util.Iterator; import java.util.LinkedList; import java.util.List; import org.eclipse.core.runtime.ListenerList; import org.eclipse.jface.action.IAction; import org.eclipse.jface.action.IMenuListener; import org.eclipse.jface.action.IMenuManager; import org.eclipse.jface.action.MenuManager; import org.eclipse.jface.action.Separator; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.viewers.ColumnPixelData; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.ISelectionProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableLayout; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.jface.viewers.TreeViewerColumn; import org.eclipse.search.ui.ISearchResult; import org.eclipse.search.ui.ISearchResultListener; import org.eclipse.search.ui.ISearchResultPage; import org.eclipse.search.ui.ISearchResultViewPart; import org.eclipse.search.ui.SearchResultEvent; import org.eclipse.search.ui.text.Match; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Menu; import org.eclipse.ui.IMemento; import org.eclipse.ui.IWorkbenchActionConstants; import org.eclipse.ui.part.Page; import ca.uvic.chisel.javasketch.SketchPlugin; import ca.uvic.chisel.javasketch.data.model.IActivation; import ca.uvic.chisel.javasketch.data.model.IMessage; import ca.uvic.chisel.javasketch.data.model.ITraceModelProxy; import ca.uvic.chisel.javasketch.ui.internal.presentation.commands.CommandAction; import ca.uvic.chisel.javasketch.ui.internal.presentation.commands.RevealActivationHandler; /** * Page for displaying the results of a trace search. * * @author Del Myers * */ public class TraceSearchResultPage extends Page implements ISearchResultPage { private String fid; private ISearchResultViewPart fpart; private TreeViewer fViewer; private ISearchResultListener resultsListener; private Composite page; /** * @author Del Myers * */ private final class SelectionForward implements ISelectionProvider, ISelectionChangedListener { ListenerList listeners = new ListenerList(); @Override public void setSelection(ISelection selection) { fViewer.setSelection(selection); } @Override public void removeSelectionChangedListener(ISelectionChangedListener listener) { listeners.remove(listener); } @Override public ISelection getSelection() { return adaptSelection(fViewer.getSelection()); } @Override public void addSelectionChangedListener(ISelectionChangedListener listener) { listeners.add(listener); } /* (non-Javadoc) * @see org.eclipse.jface.viewers.ISelectionChangedListener#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent) */ @Override public void selectionChanged(SelectionChangedEvent event) { ISelection selection = adaptSelection(event.getSelection()); SelectionChangedEvent adapted = new SelectionChangedEvent(this, selection); for (Object o : listeners.getListeners()) { ((ISelectionChangedListener) o).selectionChanged(adapted); } } /** * @param selection */ private ISelection adaptSelection(ISelection selection) { List<Object> selected = new LinkedList<Object>(); if (selection instanceof IStructuredSelection) { for (Iterator<?> i = ((IStructuredSelection) selection).iterator(); i.hasNext();) { Object o = i.next(); if (o instanceof Match) { ITraceModelProxy proxy = (ITraceModelProxy) ((Match) o).getElement(); if (proxy.getElement() != null) { selected.add(proxy.getElement()); } } else { selected.add(o); } } } return new StructuredSelection(selected); } } private class TraceSearchResultListener implements ISearchResultListener { /* * (non-Javadoc) * @see * org.eclipse.search.ui.ISearchResultListener#searchResultChanged(org * .eclipse.search.ui.SearchResultEvent) */ @Override public void searchResultChanged(SearchResultEvent e) { SketchPlugin.getDefault().getWorkbench().getDisplay().asyncExec(new Runnable() { @Override public void run() { updatePage(); } }); } } /* * (non-Javadoc) * @see org.eclipse.search.ui.ISearchResultPage#getID() */ @Override public String getID() { return fid; } /* * (non-Javadoc) * @see org.eclipse.search.ui.ISearchResultPage#setID(java.lang.String) */ @Override public void setID(String id) { fid = id; } /* * (non-Javadoc) * @see * org.eclipse.ui.part.Page#createControl(org.eclipse.swt.widgets.Composite) */ @Override public void createControl(Composite parent) { page = new Composite(parent, SWT.NULL); page.setLayout(new GridLayout()); fViewer = new TreeViewer(page, SWT.NONE); fViewer.getTree().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); TableLayout tl = new TableLayout(); fViewer.getTree().setLayout(tl); // create columns for the viewer TreeViewerColumn c = new TreeViewerColumn(fViewer, SWT.NONE); c.getColumn().setText("Search Result"); c.setLabelProvider(new TraceSearchResultLabelProvider()); GC gc = new GC(fViewer.getTree()); tl.addColumnData(new ColumnPixelData(Dialog.convertWidthInCharsToPixels(gc.getFontMetrics(), 60))); gc.dispose(); c = new TreeViewerColumn(fViewer, SWT.NONE); c.getColumn().setText("Kind"); c.setLabelProvider(new TraceSearchResultLabelProvider()); tl.addColumnData(new ColumnPixelData(50)); c = new TreeViewerColumn(fViewer, SWT.NONE); c.getColumn().setText("Trace"); c.setLabelProvider(new TraceSearchResultLabelProvider()); tl.addColumnData(new ColumnPixelData(50)); resultsListener = new TraceSearchResultListener(); fViewer.getTree().setHeaderVisible(true); fViewer.setContentProvider(new TraceSearchResultContentProvider()); //create a context menu for the viewer so that results can be //linked to MenuManager manager = new MenuManager("TraceSearchResultsPage", "#TraceSearchResults"); Menu menu = manager.createContextMenu(fViewer.getTree()); manager.setRemoveAllWhenShown(true); manager.addMenuListener(new IMenuListener() { @Override public void menuAboutToShow(IMenuManager manager) { fillContextMenu(manager); IStructuredSelection ss = (IStructuredSelection) getSite().getSelectionProvider().getSelection(); if (!ss.isEmpty()) { Object o = ss.getFirstElement(); if (o instanceof IActivation || o instanceof IMessage) { IAction action = new CommandAction(RevealActivationHandler.COMMAND_ID, null); action.setText("Reveal"); manager.add(action); } } } }); getSite().registerContextMenu("#TraceSearchResults", manager, fViewer); fViewer.getTree().setMenu(menu); SelectionForward forward = new SelectionForward(); fViewer.addSelectionChangedListener(forward); getSite().setSelectionProvider(forward); } /** * @param manager */ protected void fillContextMenu(IMenuManager manager) { manager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS)); } /* * (non-Javadoc) * @see org.eclipse.ui.part.Page#getControl() */ @Override public Control getControl() { return page; } /* * (non-Javadoc) * @see org.eclipse.ui.part.Page#setFocus() */ @Override public void setFocus() { // TODO Auto-generated method stub } /* * (non-Javadoc) * @see org.eclipse.search.ui.ISearchResultPage#getLabel() */ @Override public String getLabel() { return ""; } /* * (non-Javadoc) * @see org.eclipse.search.ui.ISearchResultPage#getUIState() */ @Override public Object getUIState() { return fViewer.getSelection(); } /* * (non-Javadoc) * @see * org.eclipse.search.ui.ISearchResultPage#restoreState(org.eclipse.ui.IMemento * ) */ @Override public void restoreState(IMemento memento) { // TODO Auto-generated method stub } /* * (non-Javadoc) * @see * org.eclipse.search.ui.ISearchResultPage#saveState(org.eclipse.ui.IMemento * ) */ @Override public void saveState(IMemento memento) { // TODO Auto-generated method stub } /* * (non-Javadoc) * @see * org.eclipse.search.ui.ISearchResultPage#setInput(org.eclipse.search.ui * .ISearchResult, java.lang.Object) */ @Override public void setInput(ISearchResult search, Object uiState) { if (!(search instanceof TraceSearchQueryResults)) { fViewer.setInput(null); } else { if (fViewer.getInput() != null) { ((TraceSearchQueryResults) fViewer.getInput()).removeListener(resultsListener); } search.addListener(resultsListener); fViewer.setInput(search); } } /* * (non-Javadoc) * @see * org.eclipse.search.ui.ISearchResultPage#setViewPart(org.eclipse.search * .ui.ISearchResultViewPart) */ @Override public void setViewPart(ISearchResultViewPart part) { fpart = part; } /** * Sets the layout to either a tree layout or a flat layout. If the layout * is flat, then sorting is available. * * @param tree * true if the layout should be as a tree. */ public void setLayout(boolean tree) { } /* * (non-Javadoc) * @see org.eclipse.ui.part.Page#dispose() */ @Override public void dispose() { super.dispose(); if (fViewer.getInput() != null) { ((ISearchResult) fViewer.getInput()).removeListener(resultsListener); } fViewer = null; } /** * */ protected void updatePage() { if (fViewer != null) { fViewer.refresh(); fpart.updateLabel(); } } }