Java tutorial
/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Eclipse Public License, Version 1.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.eclipse.org/org/documents/epl-v10.php * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.ide.eclipse.adt.internal.editors.layout.properties; import com.android.annotations.NonNull; import com.android.ide.eclipse.adt.AdtPlugin; import com.google.common.base.Splitter; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.Viewer; import org.eclipse.swt.SWT; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.KeyListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableItem; import org.eclipse.wb.internal.core.utils.execution.ExecutionUtils; import org.eclipse.wb.internal.core.utils.execution.RunnableEx; import org.eclipse.wb.internal.core.utils.ui.dialogs.ResizableDialog; import java.util.ArrayList; import java.util.List; class FlagXmlPropertyDialog extends ResizableDialog implements IStructuredContentProvider, ICheckStateListener, SelectionListener, KeyListener { private final String mTitle; private final XmlProperty mProperty; private final String[] mFlags; private final boolean mIsRadio; private Table mTable; private CheckboxTableViewer mViewer; FlagXmlPropertyDialog(@NonNull Shell parentShell, @NonNull String title, boolean isRadio, @NonNull String[] flags, @NonNull XmlProperty property) { super(parentShell, AdtPlugin.getDefault()); mTitle = title; mIsRadio = isRadio; mFlags = flags; mProperty = property; } @Override protected void configureShell(Shell newShell) { super.configureShell(newShell); newShell.setText(mTitle); } @Override protected Control createDialogArea(Composite parent) { Composite container = (Composite) super.createDialogArea(parent); mViewer = CheckboxTableViewer.newCheckList(container, SWT.BORDER | SWT.FULL_SELECTION | SWT.HIDE_SELECTION); mTable = mViewer.getTable(); mTable.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1)); Composite workaround = PropertyFactory.addWorkaround(container); if (workaround != null) { workaround.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false, false, 1, 1)); } mViewer.setContentProvider(this); mViewer.setInput(mFlags); String current = mProperty.getStringValue(); if (current != null) { Object[] checked = null; if (mIsRadio) { checked = new String[] { current }; } else { List<String> flags = new ArrayList<String>(); for (String s : Splitter.on('|').omitEmptyStrings().trimResults().split(current)) { flags.add(s); } checked = flags.toArray(new String[flags.size()]); } mViewer.setCheckedElements(checked); } if (mFlags.length > 0) { mTable.setSelection(0); } if (mIsRadio) { // Enforce single-item selection mViewer.addCheckStateListener(this); } mTable.addSelectionListener(this); mTable.addKeyListener(this); return container; } @Override protected void createButtonsForButtonBar(Composite parent) { createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true); createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false); } @Override protected Point getDefaultSize() { return new Point(450, 400); } @Override protected void okPressed() { // Apply the value ExecutionUtils.runLog(new RunnableEx() { @Override public void run() throws Exception { StringBuilder sb = new StringBuilder(30); for (Object o : mViewer.getCheckedElements()) { if (sb.length() > 0) { sb.append('|'); } sb.append((String) o); } String value = sb.length() > 0 ? sb.toString() : null; mProperty.setValue(value); } }); // close dialog super.okPressed(); } // ---- Implements IStructuredContentProvider ---- @Override public Object[] getElements(Object inputElement) { return (Object[]) inputElement; } @Override public void dispose() { } @Override public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } // ---- Implements ICheckStateListener ---- @Override public void checkStateChanged(CheckStateChangedEvent event) { // Try to disable other elements that conflict with this boolean isChecked = event.getChecked(); if (isChecked) { Object selected = event.getElement(); for (Object other : mViewer.getCheckedElements()) { if (other != selected) { mViewer.setChecked(other, false); } } } else { } } // ---- Implements SelectionListener ---- @Override public void widgetSelected(SelectionEvent e) { } @Override public void widgetDefaultSelected(SelectionEvent e) { if (e.item instanceof TableItem) { TableItem item = (TableItem) e.item; item.setChecked(!item.getChecked()); } } // ---- Implements KeyListener ---- @Override public void keyPressed(KeyEvent e) { // Let space toggle checked state if (e.keyCode == ' ' /* SWT.SPACE requires Eclipse 3.7 */) { if (mTable.getSelectionCount() == 1) { TableItem item = mTable.getSelection()[0]; item.setChecked(!item.getChecked()); } } } @Override public void keyReleased(KeyEvent e) { } }