Java tutorial
/* ********************************************************************** ** ** Copyright notice ** ** ** ** (c) 2005-2009 RSSOwl Development Team ** ** http://www.rssowl.org/ ** ** ** ** 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.rssowl.org/legal/epl-v10.html ** ** ** ** A copy is found in the file epl-v10.html and important notices to the ** ** license from the team is found in the textfile LICENSE.txt distributed ** ** in this package. ** ** ** ** This copyright notice MUST APPEAR in all copies of the file! ** ** ** ** Contributors: ** ** RSSOwl Development Team - initial API and implementation ** ** ** ** ********************************************************************** */ package org.rssowl.ui.internal.dialogs; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.CellLabelProvider; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.ViewerCell; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Point; 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.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.Text; import org.rssowl.core.Owl; import org.rssowl.core.internal.persist.pref.DefaultPreferences; import org.rssowl.core.persist.pref.IPreferenceScope; import org.rssowl.core.util.StringUtils; import org.rssowl.ui.internal.ApplicationWorkbenchWindowAdvisor; import org.rssowl.ui.internal.OwlUI; import org.rssowl.ui.internal.util.CColumnLayoutData; import org.rssowl.ui.internal.util.CTable; import org.rssowl.ui.internal.util.LayoutUtils; import org.rssowl.ui.internal.util.CColumnLayoutData.Size; import java.util.ArrayList; import java.util.Arrays; import java.util.List; /** * A dialog to list web sites allowing to add and remove sites. * * @author bpasero */ public class WebsiteListDialog extends Dialog { private IPreferenceScope fPreferences = Owl.getPreferenceService().getGlobalScope(); private TableViewer fViewer; private Text fWebsiteInput; private Button fRemoveSelectedButton; /** * @param parentShell */ public WebsiteListDialog(Shell parentShell) { super(parentShell); } /* * @see org.eclipse.jface.dialogs.Dialog#createDialogArea(org.eclipse.swt.widgets.Composite) */ @Override protected Control createDialogArea(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); composite.setLayout(LayoutUtils.createGridLayout(2, 10, 10)); composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); /* Info Label */ Label infoLabel = new Label(composite, SWT.None); infoLabel.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, false, false, 2, 1)); infoLabel.setText(Messages.WebsiteListDialog_ENTER_WEBSITE); /* URL Input */ fWebsiteInput = new Text(composite, SWT.BORDER | SWT.SINGLE); fWebsiteInput.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); fWebsiteInput.setFocus(); Button addWebsiteButton = new Button(composite, SWT.PUSH); addWebsiteButton.getShell().setDefaultButton(addWebsiteButton); addWebsiteButton.setText(Messages.WebsiteListDialog_ADD); applyDialogFont(addWebsiteButton); setButtonLayoutData(addWebsiteButton); addWebsiteButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { onAdd(); } }); /* Website List Viewer */ Composite tableContainer = new Composite(composite, SWT.NONE); tableContainer.setLayout(LayoutUtils.createGridLayout(1, 0, 0)); tableContainer.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1)); CTable cTable = new CTable(tableContainer, SWT.BORDER | SWT.MULTI | SWT.FULL_SELECTION); fViewer = new TableViewer(cTable.getControl()); fViewer.getTable().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); fViewer.getTable().setHeaderVisible(true); ((GridData) fViewer.getTable().getLayoutData()).heightHint = fViewer.getTable().getItemHeight() * 10; fViewer.getTable().setData(ApplicationWorkbenchWindowAdvisor.FOCUSLESS_SCROLL_HOOK, new Object()); TableColumn nameCol = new TableColumn(fViewer.getTable(), SWT.NONE); CColumnLayoutData data = new CColumnLayoutData(Size.FILL, 100); cTable.manageColumn(nameCol, data, Messages.WebsiteListDialog_WEBSITE, null, null, false, false); /* ContentProvider returns all providers */ fViewer.setContentProvider(new ArrayContentProvider()); /* Label Provider */ fViewer.setLabelProvider(new CellLabelProvider() { @Override public void update(ViewerCell cell) { cell.setText(cell.getElement().toString()); } }); fViewer.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(SelectionChangedEvent event) { fRemoveSelectedButton.setEnabled(!event.getSelection().isEmpty()); } }); /* Set input */ fViewer.setInput(fPreferences.getStrings(DefaultPreferences.DISABLE_JAVASCRIPT_EXCEPTIONS)); applyDialogFont(composite); return composite; } /* * @see org.eclipse.jface.dialogs.Dialog#createButtonBar(org.eclipse.swt.widgets.Composite) */ @Override protected Control createButtonBar(Composite parent) { Composite buttonBar = (Composite) super.createButtonBar(parent); ((GridLayout) buttonBar.getLayout()).marginHeight = 0; ((GridLayout) buttonBar.getLayout()).marginBottom = 10; ((GridLayout) buttonBar.getLayout()).makeColumnsEqualWidth = false; ((GridData) buttonBar.getLayoutData()).horizontalAlignment = SWT.FILL; return buttonBar; } /* * @see org.eclipse.jface.window.Window#configureShell(org.eclipse.swt.widgets.Shell) */ @Override protected void configureShell(Shell newShell) { super.configureShell(newShell); newShell.setText(Messages.WebsiteListDialog_JS_EXCEPTIONS); } /* * @see org.eclipse.jface.window.Window#getShellStyle() */ @Override protected int getShellStyle() { int style = SWT.APPLICATION_MODAL | SWT.TITLE | SWT.BORDER | SWT.RESIZE | SWT.CLOSE | getDefaultOrientation(); return style; } /* * @see org.eclipse.jface.dialogs.Dialog#createButtonsForButtonBar(org.eclipse.swt.widgets.Composite) */ @Override protected void createButtonsForButtonBar(Composite parent) { /* Remove Selected */ fRemoveSelectedButton = createButton(parent, -1, Messages.WebsiteListDialog_REMOVE_WEBSITE, false); ((GridData) fRemoveSelectedButton.getLayoutData()).horizontalAlignment = SWT.BEGINNING; ((GridData) fRemoveSelectedButton.getLayoutData()).grabExcessHorizontalSpace = false; fRemoveSelectedButton.setEnabled(false); fRemoveSelectedButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { onRemoveSelected(); } }); /* Remove All */ Button removeAllButton = createButton(parent, -2, Messages.WebsiteListDialog_REMOVE_ALL_WEBSITES, false); ((GridData) removeAllButton.getLayoutData()).horizontalAlignment = SWT.BEGINNING; ((GridData) removeAllButton.getLayoutData()).grabExcessHorizontalSpace = false; removeAllButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { onRemoveAll(); } }); /* Close */ Button closeButton = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.CLOSE_LABEL, false); int widthHint = ((GridData) closeButton.getLayoutData()).widthHint; closeButton.setLayoutData(new GridData(SWT.END, SWT.BEGINNING, true, false)); ((GridData) closeButton.getLayoutData()).widthHint = widthHint; } private void onAdd() { String website = StringUtils.normalizeString(fWebsiteInput.getText()); if (StringUtils.isSet(website)) { String[] websites = fPreferences.getStrings(DefaultPreferences.DISABLE_JAVASCRIPT_EXCEPTIONS); if (websites == null) websites = new String[0]; List<String> newWebsites = new ArrayList<String>(Arrays.asList(websites)); if (!newWebsites.contains(website)) newWebsites.add(website); String[] newWebsitesArray = newWebsites.toArray(new String[newWebsites.size()]); fPreferences.putStrings(DefaultPreferences.DISABLE_JAVASCRIPT_EXCEPTIONS, newWebsitesArray); fViewer.setInput(newWebsitesArray); } fWebsiteInput.setText(""); //$NON-NLS-1$ fWebsiteInput.setFocus(); } private void onRemoveAll() { fPreferences.delete(DefaultPreferences.DISABLE_JAVASCRIPT_EXCEPTIONS); fViewer.setInput(new String[0]); } private void onRemoveSelected() { String[] websites = fPreferences.getStrings(DefaultPreferences.DISABLE_JAVASCRIPT_EXCEPTIONS); List<String> newWebsites = new ArrayList<String>(Arrays.asList(websites)); IStructuredSelection selection = (IStructuredSelection) fViewer.getSelection(); List<?> list = selection.toList(); for (Object object : list) { String website = (String) object; newWebsites.remove(website); } String[] newWebsitesArray = newWebsites.toArray(new String[newWebsites.size()]); fPreferences.putStrings(DefaultPreferences.DISABLE_JAVASCRIPT_EXCEPTIONS, newWebsitesArray); fViewer.setInput(newWebsitesArray); } /* * @see org.eclipse.jface.dialogs.Dialog#initializeBounds() */ @Override protected void initializeBounds() { super.initializeBounds(); Shell shell = getShell(); /* Minimum Size */ int minWidth = convertHorizontalDLUsToPixels(OwlUI.MIN_DIALOG_WIDTH_DLU); int minHeight = shell.computeSize(minWidth, SWT.DEFAULT).y; /* Required Size */ Point requiredSize = shell.computeSize(SWT.DEFAULT, SWT.DEFAULT); shell.setSize(Math.max(minWidth, requiredSize.x), Math.max(minHeight, requiredSize.y)); LayoutUtils.positionShell(shell); } }