Java tutorial
package org.marketcetera.photon.views; import java.io.InputStream; import org.apache.commons.lang.StringUtils; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.databinding.validation.MultiValidator; import org.eclipse.core.databinding.validation.ValidationStatus; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.dialogs.PopupDialog; 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.widgets.*; import org.eclipse.ui.IWorkbenchPage; import org.eclipse.ui.PlatformUI; import org.marketcetera.client.OrderValidationException; import org.marketcetera.client.instruments.CurrencyValidationHandler; import org.marketcetera.core.ClassVersion; import org.marketcetera.photon.PhotonPlugin; import org.marketcetera.photon.commons.ui.databinding.DataBindingUtils; /* $License$ */ /** * This class implements the view that provides the end user the ability to type * in--and graphically interact with--currency orders. * */ @ClassVersion("$Id: CurrencyOrderTicketView.java 16492 2013-03-08 09:21:37Z sameer.patil $") public class CurrencyOrderTicketView extends OrderTicketView<CurrencyOrderTicketModel, ICurrencyOrderTicket> { public static final String ID = "org.marketcetera.photon.views.CurrencyOrderTicketView"; //$NON-NLS-1$ /** * Constructor. */ public CurrencyOrderTicketView() { super(ICurrencyOrderTicket.class, PhotonPlugin.getDefault().getCurrencyOrderTicketModel()); } @Override protected InputStream getXSWTResourceStream() { return getClass().getResourceAsStream("/currency_order_ticket.xswt"); //$NON-NLS-1$ } @Override protected String getNewOrderString() { return Messages.CURRENCY_ORDER_TICKET_VIEW_NEW__HEADING.getText(); } @Override protected String getReplaceOrderString() { return Messages.CURRENCY_ORDER_TICKET_VIEW_REPLACE__HEADING.getText(); } @Override protected void initViewers(ICurrencyOrderTicket ticket) { super.initViewers(ticket); } @Override protected void customizeWidgets(final ICurrencyOrderTicket ticket) { super.customizeWidgets(ticket); /* * Update size of text fields since default will be small. */ updateSize(ticket.getNearTenorText(), 8); updateSize(ticket.getFarTenorText(), 8); /* * Customize text fields to auto select the text on focus to make it * easy to change the value. */ selectOnFocus(ticket.getNearTenorText()); selectOnFocus(ticket.getFarTenorText()); /* * If the ticket has no errors, enter on these fields will trigger a * send. */ addSendOrderListener(ticket.getNearTenorText()); addSendOrderListener(ticket.getFarTenorText()); ticket.getSelectNearTenorButton().addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { PopupDialog d = new CalendarPopup(getSite().getShell(), ticket.getSelectNearTenorButton(), ticket.getNearTenorText()); d.open(); }; }); ticket.getSelectFarTenorButton().addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(final SelectionEvent e) { PopupDialog d = new CalendarPopup(getSite().getShell(), ticket.getSelectFarTenorButton(), ticket.getFarTenorText()); d.open(); }; }); } /** * Gets the "default" CurrencyOrderTicketView, that is the first one returned * by {@link IWorkbenchPage#findView(String)} * * @return the default CurrencyOrderTicketView */ public static CurrencyOrderTicketView getDefault() { CurrencyOrderTicketView orderTicket = (CurrencyOrderTicketView) PlatformUI.getWorkbench() .getActiveWorkbenchWindow().getActivePage().findView(CurrencyOrderTicketView.ID); return orderTicket; } @Override protected void bindMessage() { super.bindMessage(); final DataBindingContext dbc = getDataBindingContext(); final CurrencyOrderTicketModel model = getModel(); final ICurrencyOrderTicket ticket = getXSWTView(); //Symbol final IObservableValue symbolTarget = SWTObservables.observeText(ticket.getSymbolText(), SWT.Modify); MultiValidator currencySymbolValidator = new MultiValidator() { @Override protected IStatus validate() { String symbol = (String) symbolTarget.getValue(); if (symbol == null || symbol.isEmpty()) { return ValidationStatus.ok(); } try { CurrencyValidationHandler.validateCurrencySymbol(symbol); return ValidationStatus.ok(); } catch (OrderValidationException e) { return ValidationStatus.error(e.getLocalizedMessage(), e); } } }; DataBindingUtils.initControlDecorationSupportFor(currencySymbolValidator, SWT.BOTTOM | SWT.LEFT); dbc.addValidationStatusProvider(currencySymbolValidator); //Near Tenor final IObservableValue nearTenorTarget = SWTObservables.observeText(ticket.getNearTenorText(), SWT.Modify); dbc.bindValue(nearTenorTarget, model.getNearTenor()); MultiValidator nearTenorValidator = new MultiValidator() { @Override protected IStatus validate() { String tenor = (String) nearTenorTarget.getValue(); tenor = StringUtils.trimToNull(tenor); if (tenor == null || tenor.isEmpty()) { return ValidationStatus.ok(); } try { CurrencyValidationHandler.validateTenor(tenor); return ValidationStatus.ok(); } catch (OrderValidationException e) { return ValidationStatus.error(e.getLocalizedMessage(), e); } } }; DataBindingUtils.initControlDecorationSupportFor(nearTenorValidator, SWT.BOTTOM | SWT.LEFT); dbc.addValidationStatusProvider(nearTenorValidator); enableForNewOrderOnly(ticket.getNearTenorText()); enableForNewOrderOnly(ticket.getSelectNearTenorButton()); //Far Tenor final IObservableValue farTenorTarget = SWTObservables.observeText(ticket.getFarTenorText(), SWT.Modify); dbc.bindValue(farTenorTarget, model.getFarTenor()); MultiValidator farTenorValidator = new MultiValidator() { @Override protected IStatus validate() { String tenor = (String) farTenorTarget.getValue(); tenor = StringUtils.trimToNull(tenor); if (tenor == null || tenor.isEmpty()) { return ValidationStatus.ok(); } try { CurrencyValidationHandler.validateTenor(tenor); return ValidationStatus.ok(); } catch (OrderValidationException e) { return ValidationStatus.error(e.getLocalizedMessage(), e); } } }; DataBindingUtils.initControlDecorationSupportFor(farTenorValidator, SWT.BOTTOM | SWT.LEFT); dbc.addValidationStatusProvider(farTenorValidator); final IObservableValue leftCCYTarget = SWTObservables.observeSelection(ticket.getRadioButtonCCY1()); dbc.bindValue(leftCCYTarget, model.getLeftCCY()); final IObservableValue rightCCYTarget = SWTObservables.observeSelection(ticket.getRadioButtonCCY2()); dbc.bindValue(rightCCYTarget, model.getRightCCY()); enableForNewOrderOnly(ticket.getFarTenorText()); enableForNewOrderOnly(ticket.getSelectFarTenorButton()); enableForNewOrderOnly(ticket.getRadioButtonCCY1()); enableForNewOrderOnly(ticket.getRadioButtonCCY2()); } private class CalendarPopup extends PopupDialog { Button button; Text text; private static final String DATE_FORMAT = "%04d%02d%02d"; //$NON-NLS-1$ public CalendarPopup(Shell shell, Button button, Text text) { super(shell, SWT.ON_TOP, true, false, false, false, false, null, null); this.button = button; this.text = text; } @Override protected Point getDefaultLocation(Point initialSize) { Point location = getShell().getDisplay().map(button.getParent(), null, button.getLocation()); Point size = button.getSize(); return new Point(location.x + size.x, location.y + size.y); } @Override protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); final DateTime calendar = new DateTime(composite, SWT.CALENDAR); calendar.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { text.setText(String.format(DATE_FORMAT, calendar.getYear(), calendar.getMonth() + 1, calendar.getDay())); } @Override public void widgetDefaultSelected(SelectionEvent e) { widgetSelected(e); close(); } }); return composite; } } }