Java tutorial
/******************************************************************************* * Copyright (c) 2008, 2011 Thomas Holland (thomas@innot.de) 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: * Thomas Holland - initial API and implementation *******************************************************************************/ package de.innot.avreclipse.ui.views.supportedmcu; import java.util.ArrayList; import java.util.List; import java.util.Set; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.IProjectNature; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IAdaptable; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.core.runtime.jobs.Job; import org.eclipse.jface.layout.TableColumnLayout; import org.eclipse.jface.text.ITextSelection; import org.eclipse.jface.viewers.ColumnViewerToolTipSupport; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.OwnerDrawLabelProvider; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.window.ToolTip; import org.eclipse.swt.SWT; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.IMemento; import org.eclipse.ui.ISelectionListener; import org.eclipse.ui.IViewSite; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.PartInitException; import org.eclipse.ui.part.ViewPart; import de.innot.avreclipse.PluginIDs; import de.innot.avreclipse.core.properties.AVRProjectProperties; import de.innot.avreclipse.core.properties.ProjectPropertyManager; import de.innot.avreclipse.core.util.AVRMCUidConverter; /** * This is the main part of the Supported MCUs View. * * @author Thomas Holland * @since 2.2 */ public class MCUListView extends ViewPart { // The parent Composite of this Viewer private Composite fViewParent; private TableViewer fTable; private final List<MCUListColumn> fColumns = new ArrayList<MCUListColumn>(); // private IMemento fMemento; private ISelectionListener fWorkbenchSelectionListener; private SupportedContentProvider fContentProvider; public enum LabelStyle { SHOW_STRING, SHOW_YESNO, SHOW_URL; } /** * The constructor. * * Nothing done here. */ public MCUListView() { } /* * (non-Javadoc) Method declared on IViewPart. */ @Override public void init(IViewSite site, IMemento memento) throws PartInitException { // Initialize the SuperClass and store the passed memento for use by // the individual methods. super.init(site, memento); // fMemento = memento; } @Override public void saveState(IMemento memento) { // Save the current state of the viewer super.saveState(memento); // TODO: Save the Column Layout for each category } /** * Create, layout and initialize the controls of this viewer */ @SuppressWarnings("deprecation") @Override public void createPartControl(Composite parent) { fViewParent = parent; // All listeners that are need to unregistered on dispose() fWorkbenchSelectionListener = new WorkbenchSelectionListener(); TableColumnLayout tcl = new TableColumnLayout(); fViewParent.setLayout(tcl); fContentProvider = new SupportedContentProvider(); fTable = new TableViewer(parent, SWT.BORDER | SWT.FULL_SELECTION); fTable.setContentProvider(fContentProvider); fTable.setUseHashlookup(true); fTable.getTable().setHeaderVisible(true); fTable.getTable().setLinesVisible(true); MCUListColumn[] providerlist = MCUListColumn.values(); for (MCUListColumn provider : providerlist) { provider.addColumn(fTable, tcl); fColumns.add(provider); } // setUpOwnerDraw has been deprecated in Eclipse 3.4, but we still support 3.3 OwnerDrawLabelProvider.setUpOwnerDraw(fTable); ColumnViewerToolTipSupport.enableFor(fTable, ToolTip.NO_RECREATE); fTable.setInput(fContentProvider); // Add the Table as a Workbench Selection provider getSite().setSelectionProvider(fTable); // Activate the Workbench selection listener getSite().getWorkbenchWindow().getSelectionService().addPostSelectionListener(fWorkbenchSelectionListener); for (MCUListColumn mlc : fColumns) { mlc.updateColumn(); } } /* * (non-Javadoc) * @see org.eclipse.ui.part.WorkbenchPart#setFocus() */ @Override public void setFocus() { // This is a pure viewer, so nothing to set the focus to } /* * (non-Javadoc) * @see org.eclipse.ui.part.WorkbenchPart#dispose() */ @Override public void dispose() { // remove the listeners from their objects getSite().getWorkbenchWindow().getSelectionService() .removePostSelectionListener(fWorkbenchSelectionListener); super.dispose(); } /** * Handle Selection Change Events. * <p> * This is called by the workbench selection services to inform this viewer, that something has * been selected on the workbench. If something with an AVR MCU type has been selected * (Project), then the viewer will show the description of the associated mcu. * </p> */ private class WorkbenchSelectionListener implements ISelectionListener { /* * (non-Javadoc) * @see org.eclipse.ui.ISelectionListener#selectionChanged(org.eclipse.ui.IWorkbenchPart, * org.eclipse.jface.viewers.ISelection) */ public void selectionChanged(IWorkbenchPart part, final ISelection selection) { // we ignore our own selections if (part == MCUListView.this) { return; } // To minimize the GUI impact run the rest of this method in a Job Job selectionjob = new Job("AVR MCU List") { @Override protected IStatus run(IProgressMonitor monitor) { String newid = null; try { monitor.beginTask("Selection Change", 3); Set<String> mculist = fContentProvider.getMasterMCUList(); monitor.worked(1); // see if the selection is something that has an avr mcu // id if (selection instanceof IStructuredSelection) { // First: Projects IStructuredSelection ss = (IStructuredSelection) selection; newid = getMCUId(ss); } else if (selection instanceof ITextSelection) { // Second: Selected Text String text = ((ITextSelection) selection).getText(); // Test if the text is an MCU name/id if (mculist.contains(AVRMCUidConverter.name2id(text))) { // yes: use it newid = AVRMCUidConverter.name2id(text); } } monitor.worked(1); if (newid != null) { // Test if it is a valid mcu id. Only set valid mcu // id values as otherwise an error message would be // displayed if (!mculist.contains(AVRMCUidConverter.name2id(newid))) { return Status.OK_STATUS; } // Next cause a SelectionChange Event in the UI // Thread, which handles the rest of the change. // (Only if the control still exists) final IStructuredSelection newselection = new StructuredSelection(newid); if ((fViewParent != null) && (!fViewParent.isDisposed())) { fViewParent.getDisplay().asyncExec(new Runnable() { public void run() { if ((fTable != null) && (!fTable.getControl().isDisposed())) { fTable.setSelection(newselection, true); } } }); // Runnable } } monitor.worked(1); } finally { monitor.done(); } return Status.OK_STATUS; } }; selectionjob.setSystem(true); selectionjob.setPriority(Job.SHORT); selectionjob.schedule(); } /** * Get the mcu id from the given structured selection. * <p> * If the first element of the selection is an AVR project, the mcu type is taken from the * properties of the active build configuration. * </p> * <p> * If the selection did not contain a valid mcu type <code>null</code> is returned * * @param selection * <code>IStructuredSelection</code> from the Eclipse Selection Services * @return String with the mcu id or <code>null</null> if no mcu id was found. */ private String getMCUId(IStructuredSelection selection) { Object item = selection.getFirstElement(); if (item == null) { return null; } IProject project = null; // See if the given is an IProject (directly or via IAdaptable if (item instanceof IProject) { project = (IProject) item; } else if (item instanceof IAdaptable) { IAdaptable adaptable = (IAdaptable) item; project = (IProject) adaptable.getAdapter(IProject.class); } if (project != null) { // Ok, the item is a IProject try { IProjectNature nature = project.getNature(PluginIDs.NATURE_ID); if (nature != null) { // This is an AVR Project // Get the AVR properties for the active build // configuration and fetch the mcu id from it. ProjectPropertyManager projprops = ProjectPropertyManager.getPropertyManager(project); AVRProjectProperties props = projprops.getActiveProperties(); return props.getMCUId(); } } catch (CoreException e) { return null; } } else if (item instanceof String) { // The item was not an IProject, but a String String mcuname = (String) item; String mcuid = AVRMCUidConverter.name2id(mcuname); return mcuid; } // Selection does not contain a mcuid return null; } } }