Java tutorial
/******************************************************************************* * Copyright (c) 2004, 2006 Sybase, Inc. 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: * Sybase, Inc. - initial API and implementation *******************************************************************************/ package org.eclipse.jst.jsf.facesconfig.ui.section; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.emf.common.command.Command; import org.eclipse.emf.common.command.CompoundCommand; import org.eclipse.emf.ecore.EObject; import org.eclipse.emf.edit.command.RemoveCommand; import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider; import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.StructuredViewer; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jst.jsf.facesconfig.ui.EditorMessages; import org.eclipse.jst.jsf.facesconfig.ui.page.FacesConfigMasterDetailPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.ui.forms.IManagedForm; import org.eclipse.ui.forms.widgets.FormToolkit; /** * An default implementation of AbstractFacesConfigSection for Master Section. * * @author sfshi * */ public abstract class FacesConfigMasterSection extends AbstractFacesConfigSection { private StructuredViewer structuredViewer; private Button removeButton; /** * * @param parent * @param managedForm * @param toolkit * @param page * @param helpContextId * @param helpTooltip */ public FacesConfigMasterSection(Composite parent, IManagedForm managedForm, FormToolkit toolkit, FacesConfigMasterDetailPage page, String helpContextId, String helpTooltip) { super(parent, managedForm, page, toolkit, helpContextId, helpTooltip); } public void dispose() { structuredViewer.removeSelectionChangedListener(this); super.dispose(); } /** * */ protected void createContents(Composite container, FormToolkit toolkit) { GridLayout layout = new GridLayout(); layout.numColumns = 2; layout.marginWidth = layout.marginHeight = 5; container.setLayout(layout); structuredViewer = createViewer(container, toolkit); structuredViewer.addSelectionChangedListener(this); createOperationSection(container, toolkit); } /** * Create the structured viewer, set up content & label provider for it. * Defaultly create a tableviewer. * * @param parent * @param toolkit * @return the structured viewer */ protected StructuredViewer createViewer(Composite parent, FormToolkit toolkit) { Composite tableContainer = toolkit.createComposite(parent); toolkit.paintBordersFor(tableContainer); GridData gd = new GridData(GridData.FILL_BOTH); gd.heightHint = 200; tableContainer.setLayoutData(gd); GridLayout layout = new GridLayout(); tableContainer.setLayout(layout); TableViewer tableViewer = new TableViewer(tableContainer, SWT.SINGLE | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER); gd = new GridData(GridData.FILL_BOTH); tableViewer.getControl().setLayoutData(gd); tableViewer.setContentProvider(new AdapterFactoryContentProvider(getAdapterFactory())); tableViewer.setLabelProvider(new AdapterFactoryLabelProvider(getAdapterFactory())); configViewer(tableViewer); return tableViewer; } /** * Config the viewer, such as set a filter and so on. Sub classes should * override this method to add filter. * * @param viewer */ protected void configViewer(StructuredViewer viewer) { // do nothing; subs may override } /** * Defaultly we create a "New" button and a "Remove" button. Sub classes can * overwrite this method if need other functions. * * @param parent * @param toolkit */ protected void createOperationSection(Composite parent, FormToolkit toolkit) { Composite operationContainer = toolkit.createComposite(parent); GridData gd = new GridData(GridData.FILL_VERTICAL); operationContainer.setLayoutData(gd); GridLayout layout = new GridLayout(); operationContainer.setLayout(layout); Button addButton = toolkit.createButton(operationContainer, EditorMessages.UI_Button_Add, SWT.PUSH); gd = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING); gd.grabExcessHorizontalSpace = false; addButton.setLayoutData(gd); addButton.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { addButtonSelected(e); } }); setRemoveButton(toolkit.createButton(operationContainer, EditorMessages.UI_Button_Remove, SWT.PUSH)); gd = new GridData(GridData.FILL_HORIZONTAL | GridData.VERTICAL_ALIGN_BEGINNING); gd.grabExcessHorizontalSpace = false; getRemoveButton().setLayoutData(gd); getRemoveButton().addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { removeButtonSelected(e); } }); } /** * * @param e */ protected abstract void addButtonSelected(SelectionEvent e); /** * * @param e */ protected void removeButtonSelected(SelectionEvent e) { IStructuredSelection ssel = StructuredSelection.EMPTY; ISelection selection = getSelection(); if (selection instanceof IStructuredSelection) { ssel = (IStructuredSelection) selection; } if (!ssel.isEmpty()) { List commands = new ArrayList(ssel.size()); for (Iterator iter = ssel.iterator(); iter.hasNext();) { EObject element = (EObject) iter.next(); Command command = RemoveCommand.create(getEditingDomain(), element); commands.add(command); } CompoundCommand command = new CompoundCommand(commands); if (command.canExecute()) { getEditingDomain().getCommandStack().execute(command); } } } /** * * update the buttons' enable state. */ protected void updateButtons() { IStructuredSelection ssel = (IStructuredSelection) structuredViewer.getSelection(); getRemoveButton().setEnabled(!ssel.isEmpty()); } /** * */ public ISelection getSelection() { return structuredViewer.getSelection(); } /** * */ public void setSelection(ISelection selection) { structuredViewer.setSelection(selection); } /** * refresh the display of this section. */ public void refresh() { super.refresh(); structuredViewer.refresh(); updateButtons(); } /** * */ public void refreshAll() { // master section refresh all: setViewerInput(getInput()); updateButtons(); // detial sections refresh: // fire an event to the detail sections, let them // refresh. selectionChanged(null); } /** * set the structuredViewer's input * * @param input */ private void setViewerInput(Object input) { structuredViewer.setInput(input); } /** * */ protected void expansionStateChanged(boolean expanded) { if (expanded) { if (structuredViewer.getInput() == null) { refreshAll(); } structuredViewer.refresh(true); structuredViewer.setSelection(structuredViewer.getSelection()); } else { structuredViewer.setSelection(null); } super.expansionStateChanged(expanded); } /** * */ protected void expansionStateChanging(boolean expanding) { if (!expanding) { GridData gd = new GridData(GridData.FILL_HORIZONTAL); this.getSection().setLayoutData(gd); } else { ((FacesConfigMasterDetailPage) getPage()).closeOtherSections(this); GridData gd = new GridData(GridData.FILL_BOTH); this.getSection().setLayoutData(gd); } super.expansionStateChanging(expanding); } /** * get the viewer. * * @return the viewer */ public StructuredViewer getStructuredViewer() { return structuredViewer; } /* (non-Javadoc) * @see org.eclipse.jst.jsf.facesconfig.ui.section.AbstractFacesConfigSection#selectionChanged(org.eclipse.jface.viewers.SelectionChangedEvent) */ public void selectionChanged(SelectionChangedEvent event) { super.selectionChanged(event); updateButtons(); } private void setRemoveButton(Button removeButton) { this.removeButton = removeButton; } /** * @return the remove button */ protected Button getRemoveButton() { return removeButton; } }