Java tutorial
/* * Copyright (c) 2004-2011 Marco Maccaferri 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: * Marco Maccaferri - initial API and implementation */ package org.eclipsetrader.internal.brokers.paper; import java.util.Currency; import java.util.HashSet; import java.util.Locale; import java.util.Set; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.ViewerSorter; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; 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.Spinner; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IWorkbenchPropertyPage; import org.eclipse.ui.dialogs.PropertyPage; import org.eclipsetrader.internal.brokers.paper.schemes.LimitedProportional1Scheme; import org.eclipsetrader.internal.brokers.paper.schemes.LimitedProportional2Scheme; import org.eclipsetrader.internal.brokers.paper.schemes.NoExpensesScheme; import org.eclipsetrader.internal.brokers.paper.schemes.SimpleFixedScheme; import org.eclipsetrader.internal.brokers.paper.schemes.TwoLevelsPerShareScheme; public class AccountPropertyPage extends PropertyPage implements IWorkbenchPropertyPage { Text name; ComboViewer currency; ComboViewer expenses; Spinner balance; private IExpenseScheme[] availableSchemes = new IExpenseScheme[] { new NoExpensesScheme(), new SimpleFixedScheme(), new LimitedProportional1Scheme(), new LimitedProportional2Scheme(), new TwoLevelsPerShareScheme(), }; private ModifyListener modifyListener = new ModifyListener() { @Override public void modifyText(ModifyEvent e) { setValid(isValid()); } }; private ISelectionChangedListener selectionChangedListener = new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { setValid(isValid()); } }; public AccountPropertyPage() { } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite) */ @Override protected Control createContents(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(2, false); layout.marginHeight = layout.marginWidth = 0; layout.verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING); layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING); composite.setLayout(layout); composite.setLayoutData(new GridData(GridData.FILL_BOTH)); applyDialogFont(composite); Label label = new Label(composite, SWT.NONE); label.setText(Messages.AccountPropertyPage_Name); name = new Text(composite, SWT.BORDER); name.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); label = new Label(composite, SWT.NONE); label.setText(Messages.AccountPropertyPage_Currency); currency = new ComboViewer(composite, SWT.DROP_DOWN | SWT.READ_ONLY); currency.setLabelProvider(new LabelProvider()); currency.setContentProvider(new ArrayContentProvider()); currency.setSorter(new ViewerSorter()); Locale[] l = Locale.getAvailableLocales(); Set<Currency> c = new HashSet<Currency>(); for (int i = 0; i < l.length; i++) { try { c.add(Currency.getInstance(l[i])); } catch (Exception e) { // Ignore, some locales may throw an exception } } currency.setInput(c.toArray()); label = new Label(composite, SWT.NONE); label.setText(Messages.AccountPropertyPage_Balance); balance = new Spinner(composite, SWT.BORDER); balance.setValues(0, 0, 999999999, 2, 10000, 100000); label = new Label(composite, SWT.NONE); label.setText(Messages.AccountPropertyPage_ExpensesScheme); expenses = new ComboViewer(composite, SWT.DROP_DOWN | SWT.READ_ONLY); expenses.setLabelProvider(new LabelProvider()); expenses.setContentProvider(new ArrayContentProvider()); expenses.setInput(availableSchemes); name.addModifyListener(modifyListener); currency.addSelectionChangedListener(selectionChangedListener); balance.addModifyListener(modifyListener); expenses.addSelectionChangedListener(selectionChangedListener); performDefaults(); return composite; } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#performDefaults() */ @Override protected void performDefaults() { Account account = (Account) getElement().getAdapter(Account.class); name.setText(account.getDescription()); if (account.getCurrency() != null) { currency.setSelection(new StructuredSelection(account.getCurrency())); } balance.setSelection((int) (account.getBalance().getAmount() * Math.pow(10, balance.getDigits()))); if (account.getExpenseScheme() != null) { expenses.setSelection(new StructuredSelection(account.getExpenseScheme())); } super.performDefaults(); } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#isValid() */ @Override public boolean isValid() { if (name.getText().equals("")) { //$NON-NLS-1$ return false; } return super.isValid(); } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#performOk() */ @Override public boolean performOk() { Account account = (Account) getElement().getAdapter(Account.class); account.setDescription(name.getText()); account.setCurrency((Currency) ((IStructuredSelection) currency.getSelection()).getFirstElement()); account.setBalance(balance.getSelection() / Math.pow(10, balance.getDigits())); account.setExpenseScheme( (IExpenseScheme) ((IStructuredSelection) expenses.getSelection()).getFirstElement()); return super.performOk(); } }