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.ui.internal.markets; import java.util.ArrayList; import java.util.List; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.layout.TableColumnLayout; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ColumnPixelData; import org.eclipse.jface.viewers.ColumnWeightData; 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.Viewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.jface.window.Window; 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.swt.widgets.Control; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.ui.dialogs.PropertyPage; import org.eclipsetrader.core.internal.markets.Market; import org.eclipsetrader.core.internal.markets.MarketHoliday; public class HolidaysPage extends PropertyPage { TableViewer viewer; Button add; Button edit; Button remove; List<MarketHolidayElement> input; public HolidaysPage() { setTitle(Messages.HolidaysPage_Holidays); noDefaultAndApplyButton(); } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite) */ @Override protected Control createContents(Composite parent) { Composite content = new Composite(parent, SWT.NONE); content.setLayout(new GridLayout(2, false)); ((GridLayout) content.getLayout()).marginWidth = 0; ((GridLayout) content.getLayout()).marginHeight = 0; createViewer(content); createButtons(content); input = new ArrayList<MarketHolidayElement>(); if (getElement() != null) { Market market = (Market) getElement().getAdapter(Market.class); if (market != null) { for (MarketHoliday day : market.getHolidays()) { input.add(new MarketHolidayElement(day)); } } } viewer.setInput(input); updateButtonsEnablement(); return content; } protected void createViewer(Composite parent) { Composite content = new Composite(parent, SWT.NONE); TableColumnLayout tableLayout = new TableColumnLayout(); content.setLayout(tableLayout); content.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); viewer = new TableViewer(content, SWT.MULTI | SWT.FULL_SELECTION | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL); viewer.getTable().setHeaderVisible(true); viewer.getTable().setLinesVisible(false); viewer.getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); ((GridData) viewer.getControl().getLayoutData()).heightHint = viewer.getTable().getItemHeight() * 8 + viewer.getTable().getBorderWidth() * 2; TableColumn tableColumn = new TableColumn(viewer.getTable(), SWT.RIGHT); tableColumn.setText(Messages.HolidaysPage_Date); tableLayout.setColumnData(tableColumn, new ColumnPixelData(convertHorizontalDLUsToPixels(60))); tableColumn = new TableColumn(viewer.getTable(), SWT.NONE); tableColumn.setText(Messages.HolidaysPage_Description); tableLayout.setColumnData(tableColumn, new ColumnWeightData(100)); viewer.setLabelProvider(new MarketHolidayLabelProvider()); viewer.setComparator(new ViewerComparator() { @Override public int compare(Viewer viewer, Object e1, Object e2) { return ((MarketHolidayElement) e1).getDate().compareTo(((MarketHolidayElement) e2).getDate()); } }); viewer.setContentProvider(new ArrayContentProvider()); viewer.addSelectionChangedListener(new ISelectionChangedListener() { @Override public void selectionChanged(SelectionChangedEvent event) { updateButtonsEnablement(); } }); } protected void createButtons(Composite parent) { Composite content = new Composite(parent, SWT.NONE); content.setLayout(new GridLayout(1, false)); ((GridLayout) content.getLayout()).marginWidth = 0; ((GridLayout) content.getLayout()).marginHeight = 0; content.setLayoutData(new GridData(SWT.FILL, SWT.TOP, false, false)); add = new Button(content, SWT.PUSH); add.setText(Messages.HolidaysPage_Add); add.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false)); ((GridData) add.getLayoutData()).widthHint = convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH); add.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { HolidayDialog dlg = new HolidayDialog(add.getShell(), null); if (dlg.open() == Window.OK) { input.add(dlg.getElement()); viewer.refresh(); } } }); edit = new Button(content, SWT.PUSH); edit.setText(Messages.HolidaysPage_Edit); edit.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false)); ((GridData) edit.getLayoutData()).widthHint = convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH); edit.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); if (!selection.isEmpty()) { MarketHolidayElement element = (MarketHolidayElement) selection.getFirstElement(); HolidayDialog dlg = new HolidayDialog(edit.getShell(), element); if (dlg.open() == Window.OK) { viewer.refresh(); } } } }); remove = new Button(content, SWT.PUSH); remove.setText(Messages.HolidaysPage_Remove); remove.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false)); remove.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); if (!selection.isEmpty()) { input.removeAll(selection.toList()); viewer.refresh(); } } }); } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#performOk() */ @Override public boolean performOk() { if (isControlCreated() && getElement() != null) { Market market = (Market) getElement().getAdapter(Market.class); if (market != null) { MarketHoliday[] holidays = new MarketHoliday[input.size()]; for (int i = 0; i < input.size(); i++) { holidays[i] = input.get(i).getMarketHoliday(); } market.setHolidays(holidays); } } return super.performOk(); } protected void updateButtonsEnablement() { IStructuredSelection selection = (IStructuredSelection) viewer.getSelection(); edit.setEnabled(selection.size() == 1); remove.setEnabled(!selection.isEmpty()); } }