Java tutorial
/* * Copyright (c) 2012, the Dart project authors. * * Licensed under the Eclipse Public License v1.0 (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/legal/epl-v10.html * * 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.github.sdbg.debug.ui.internal.preferences; import com.github.sdbg.debug.core.SDBGDebugCorePlugin; import com.github.sdbg.debug.core.SDBGDebugCorePlugin.BreakOnExceptions; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.layout.PixelConverter; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; /** * The preference page for Dart debugging. */ public class DebugPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { public static final String PAGE_ID = "com.github.sdbg.debug.debugPreferencePage"; //$NON-NLS-1$ private Combo exceptionsCombo; private Button defaultBrowserButton; private Text browserNameText; private Button selectBrowserButton; private Text browserArgumentText; /** * Create a new preference page. */ public DebugPreferencePage() { } @Override public void init(IWorkbench workbench) { noDefaultAndApplyButton(); } @Override public boolean performOk() { SDBGDebugCorePlugin.getPlugin().setBreakOnExceptions(BreakOnExceptions.valueOf(exceptionsCombo.getText())); SDBGDebugCorePlugin.getPlugin().setBrowserPreferences(defaultBrowserButton.getSelection(), browserNameText.getText().trim(), browserArgumentText.getText().trim()); return true; } @Override protected Control createContents(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); GridDataFactory.fillDefaults().grab(true, false).indent(0, 10).align(SWT.FILL, SWT.BEGINNING) .applyTo(composite); GridLayoutFactory.fillDefaults().spacing(0, 8).margins(0, 10).applyTo(composite); Group group = new Group(composite, SWT.NONE); group.setText("Debugging"); GridDataFactory.fillDefaults().grab(true, false).align(SWT.FILL, SWT.BEGINNING).applyTo(group); GridLayoutFactory.fillDefaults().numColumns(2).margins(8, 8).applyTo(group); Label label = new Label(group, SWT.NONE); label.setText("Break on exceptions:"); label.pack(); int labelWidth = label.getSize().x; exceptionsCombo = new Combo(group, SWT.DROP_DOWN | SWT.READ_ONLY); exceptionsCombo.setItems(new String[] { BreakOnExceptions.none.toString(), BreakOnExceptions.uncaught.toString(), BreakOnExceptions.all.toString() }); exceptionsCombo .select(exceptionsCombo.indexOf(SDBGDebugCorePlugin.getPlugin().getBreakOnExceptions().toString())); createBrowserConfig(composite, labelWidth); return composite; } private void createBrowserConfig(Composite composite, int labelWidth) { Group browserGroup = new Group(composite, SWT.NONE); browserGroup.setText("Launching"); GridDataFactory.fillDefaults().grab(true, false).applyTo(browserGroup); GridLayoutFactory.swtDefaults().numColumns(3).applyTo(browserGroup); ((GridLayout) browserGroup.getLayout()).marginBottom = 5; defaultBrowserButton = new Button(browserGroup, SWT.CHECK); defaultBrowserButton.setText(DebugPreferenceMessages.DebugPreferencePage_DefaultBrowserMessage); GridDataFactory.swtDefaults().span(3, 1).applyTo(defaultBrowserButton); defaultBrowserButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { if (defaultBrowserButton.getSelection()) { setEnablement(false); } else { setEnablement(true); } } }); Label browserLabel = new Label(browserGroup, SWT.NONE); browserLabel.setText(DebugPreferenceMessages.DebugPreferencePage_BrowserLabel); GridDataFactory.swtDefaults().hint(labelWidth, -1).applyTo(browserLabel); browserNameText = new Text(browserGroup, SWT.BORDER | SWT.SINGLE); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(browserNameText); selectBrowserButton = new Button(browserGroup, SWT.PUSH); selectBrowserButton.setText(DebugPreferenceMessages.DebugPreferencePage_Select); PixelConverter converter = new PixelConverter(selectBrowserButton); int widthHint = converter.convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH); GridDataFactory.swtDefaults().hint(widthHint, -1).applyTo(selectBrowserButton); selectBrowserButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { handleBrowserConfigBrowseButton(); } }); Label argsLabel = new Label(browserGroup, SWT.NONE); argsLabel.setText("Browser arguments:"); GridDataFactory.swtDefaults().hint(labelWidth, -1).applyTo(argsLabel); browserArgumentText = new Text(browserGroup, SWT.BORDER | SWT.SINGLE); GridDataFactory.swtDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(browserArgumentText); initFromPrefs(); } private void handleBrowserConfigBrowseButton() { FileDialog fd = new FileDialog(getShell(), SWT.OPEN); String filePath = fd.open(); if (filePath != null) { browserNameText.setText(filePath); } } private void initFromPrefs() { boolean useDefaultBrowser = SDBGDebugCorePlugin.getPlugin().getIsDefaultBrowser(); defaultBrowserButton.setSelection(useDefaultBrowser); browserNameText.setText(SDBGDebugCorePlugin.getPlugin().getBrowserName()); browserArgumentText.setText(SDBGDebugCorePlugin.getPlugin().getBrowserArgs()); setEnablement(!useDefaultBrowser); } private void setEnablement(boolean value) { selectBrowserButton.setEnabled(value); browserNameText.setEnabled(value); browserArgumentText.setEnabled(value); } }