Java tutorial
/******************************************************************************* * Copyright (c) 2005, 2012 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.summer.sdt.internal.debug.ui.jres; import java.util.HashMap; import java.util.Map; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; 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.Label; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.PlatformUI; import org.summer.sdt.internal.debug.ui.IJavaDebugHelpContextIds; import org.summer.sdt.launching.IVMInstall; import org.summer.sdt.launching.JavaRuntime; import org.summer.sdt.launching.environments.IExecutionEnvironment; import org.summer.sdt.launching.environments.IExecutionEnvironmentsManager; /** * Sets default VM per execution environment. * * @since 3.2 */ public class ExecutionEnvironmentsPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { /** * The ID of the page * * @since 3.5 */ public static final String ID = "org.summer.sdt.debug.ui.jreProfiles"; //$NON-NLS-1$ private TableViewer fProfilesViewer; private CheckboxTableViewer fJREsViewer; private Text fDescription; /** * Working copy "EE Profile -> Default JRE" */ private Map<Object, Object> fDefaults = new HashMap<Object, Object>(); class JREsContentProvider implements IStructuredContentProvider { /* (non-Javadoc) * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object) */ public Object[] getElements(Object inputElement) { return ((IExecutionEnvironment) inputElement).getCompatibleVMs(); } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IContentProvider#dispose() */ public void dispose() { } /* (non-Javadoc) * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) */ public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } } public ExecutionEnvironmentsPreferencePage() { super(); // only used when page is shown programatically setTitle(JREMessages.JREProfilesPreferencePage_0); setDescription(JREMessages.JREProfilesPreferencePage_1); } /* (non-Javadoc) * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench) */ public void init(IWorkbench workbench) { } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite) */ @Override protected Control createContents(Composite ancestor) { initializeDialogUnits(ancestor); noDefaultAndApplyButton(); // TODO: fix help PlatformUI.getWorkbench().getHelpSystem().setHelp(ancestor, IJavaDebugHelpContextIds.JRE_PROFILES_PAGE); // init default mappings IExecutionEnvironmentsManager manager = JavaRuntime.getExecutionEnvironmentsManager(); IExecutionEnvironment[] environments = manager.getExecutionEnvironments(); for (int i = 0; i < environments.length; i++) { IExecutionEnvironment environment = environments[i]; IVMInstall install = environment.getDefaultVM(); if (install != null) { fDefaults.put(environment, install); } } Composite container = new Composite(ancestor, SWT.NONE); GridLayout layout = new GridLayout(); layout.numColumns = 2; layout.marginHeight = 0; layout.marginWidth = 0; layout.makeColumnsEqualWidth = true; container.setLayout(layout); GridData gd = new GridData(GridData.FILL_BOTH); container.setLayoutData(gd); container.setFont(ancestor.getFont()); Composite eeContainer = new Composite(container, SWT.NONE); layout = new GridLayout(); layout.marginWidth = 0; eeContainer.setLayout(layout); eeContainer.setLayoutData(new GridData(GridData.FILL_BOTH)); Label label = new Label(eeContainer, SWT.NONE); label.setFont(ancestor.getFont()); label.setText(JREMessages.JREProfilesPreferencePage_2); label.setLayoutData(new GridData(SWT.FILL, 0, true, false)); Table table = new Table(eeContainer, SWT.BORDER | SWT.SINGLE); table.setLayout(layout); table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); fProfilesViewer = new TableViewer(table); fProfilesViewer.setContentProvider(new ArrayContentProvider()); fProfilesViewer.setLabelProvider(new ExecutionEnvironmentsLabelProvider()); fProfilesViewer.setInput(JavaRuntime.getExecutionEnvironmentsManager().getExecutionEnvironments()); Composite jreContainer = new Composite(container, SWT.NONE); layout = new GridLayout(); layout.marginWidth = 0; jreContainer.setLayout(layout); jreContainer.setLayoutData(new GridData(GridData.FILL_BOTH)); label = new Label(jreContainer, SWT.NONE); label.setFont(ancestor.getFont()); label.setText(JREMessages.JREProfilesPreferencePage_3); label.setLayoutData(new GridData(SWT.FILL, 0, true, false)); table = new Table(jreContainer, SWT.CHECK | SWT.BORDER | SWT.SINGLE); table.setLayout(layout); table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); fJREsViewer = new CheckboxTableViewer(table); fJREsViewer.setContentProvider(new JREsContentProvider()); fJREsViewer.setLabelProvider( new JREsEnvironmentLabelProvider(new JREsEnvironmentLabelProvider.IExecutionEnvironmentProvider() { public IExecutionEnvironment getEnvironment() { return (IExecutionEnvironment) fJREsViewer.getInput(); } })); fJREsViewer.setComparator(new JREsEnvironmentComparator()); label = new Label(container, SWT.NONE); label.setFont(ancestor.getFont()); label.setText(JREMessages.JREProfilesPreferencePage_4); label.setLayoutData(new GridData(SWT.FILL, 0, true, false, 2, 1)); Text text = new Text(container, SWT.READ_ONLY | SWT.WRAP | SWT.BORDER); text.setFont(ancestor.getFont()); text.setLayoutData(new GridData(SWT.FILL, 0, true, false, 2, 1)); fDescription = text; fProfilesViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { IExecutionEnvironment env = (IExecutionEnvironment) ((IStructuredSelection) event.getSelection()) .getFirstElement(); fJREsViewer.setInput(env); String description = env.getDescription(); if (description == null) { description = ""; //$NON-NLS-1$ } fDescription.setText(description); IVMInstall jre = (IVMInstall) fDefaults.get(env); if (jre != null) { fJREsViewer.setCheckedElements(new Object[] { jre }); } else { fJREsViewer.setCheckedElements(new Object[0]); } } }); fJREsViewer.addCheckStateListener(new ICheckStateListener() { public void checkStateChanged(CheckStateChangedEvent event) { if (event.getChecked()) { Object element = event.getElement(); fDefaults.put(fJREsViewer.getInput(), element); fJREsViewer.setCheckedElements(new Object[] { element }); } else { fDefaults.remove(fJREsViewer.getInput()); } } }); Dialog.applyDialogFont(ancestor); return ancestor; } /* (non-Javadoc) * @see org.eclipse.jface.preference.IPreferencePage#performOk() */ @Override public boolean performOk() { IExecutionEnvironmentsManager manager = JavaRuntime.getExecutionEnvironmentsManager(); IExecutionEnvironment[] environments = manager.getExecutionEnvironments(); for (int i = 0; i < environments.length; i++) { IExecutionEnvironment environment = environments[i]; IVMInstall vm = (IVMInstall) fDefaults.get(environment); // if the VM no longer exists - set to default to avoid illegal argument exception (bug 267914) if (vm != null) { if (vm.getVMInstallType().findVMInstall(vm.getId()) == null) { vm = null; } } environment.setDefaultVM(vm); } return super.performOk(); } }