Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2011 IBM Corporation 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: * IBM Corporation - initial API and implementation * QNX Software System * Anton Leherbauer (Wind River Systems) * Sergey Prigogin (Google) * James Blackburn (Broadcom Corp.) *******************************************************************************/ package org.eclipse.cdt.internal.ui.preferences; import java.util.ArrayList; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.layout.PixelConverter; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Font; 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.Group; import org.eclipse.swt.widgets.Label; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.PlatformUI; import org.eclipse.cdt.core.CCorePlugin; import org.eclipse.cdt.ui.CUIPlugin; import org.eclipse.cdt.ui.PreferenceConstants; import org.eclipse.cdt.internal.ui.ICHelpContextIds; import org.eclipse.cdt.internal.ui.dialogs.OptionalMessageDialog; import org.eclipse.cdt.internal.ui.util.SWTUtil; /** * The page for general C/C++ preferences. */ public class CPluginPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { public static final String C_BASE_PREF_PAGE_ID = "org.eclipse.cdt.ui.preferences.CPluginPreferencePage"; //$NON-NLS-1$ private static final int GROUP_VINDENT = 5; private ArrayList<Button> fCheckBoxes; public CPluginPreferencePage() { super(); setPreferenceStore(CUIPlugin.getDefault().getPreferenceStore()); setDescription(PreferencesMessages.CPluginPreferencePage_description); fCheckBoxes = new ArrayList<Button>(); } @Override public void createControl(Composite parent) { super.createControl(parent); PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), ICHelpContextIds.C_PREF_PAGE); } @Override protected Control createContents(Composite parent) { initializeDialogUnits(parent); Composite container = new Composite(parent, SWT.NONE); GridLayout layout = new GridLayout(); layout.marginHeight = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_MARGIN); layout.marginWidth = 0; layout.verticalSpacing = convertVerticalDLUsToPixels(10); layout.horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING); container.setLayout(layout); Group outlineViewGroup = addGroup(container, PreferencesMessages.CPluginPreferencePage_outline_view); addCheckBox(outlineViewGroup, PreferencesMessages.CPluginPreferencePage_structuralParseMode_label, PreferenceConstants.PREF_USE_STRUCTURAL_PARSE_MODE); addNote(outlineViewGroup, PreferencesMessages.CPluginPreferencePage_performanceHint); // Refactoring. Group refactoringGroup = addGroup(container, PreferencesMessages.CPluginPreferencePage_refactoring_title); addCheckBox(refactoringGroup, PreferencesMessages.CPluginPreferencePage_refactoring_auto_save, PreferenceConstants.REFACTOR_SAVE_ALL_EDITORS); addCheckBox(refactoringGroup, PreferencesMessages.CPluginPreferencePage_refactoring_lightweight, PreferenceConstants.REFACTOR_LIGHTWEIGHT); Group dontAskGroup = addGroup(container, PreferencesMessages.CPluginPreferencePage_cdtDialogs_group, 2); Label label = new Label(dontAskGroup, SWT.WRAP); label.setText(PreferencesMessages.CPluginPreferencePage_clearDoNotShowAgainSettings_label); GridData data = new GridData(GridData.FILL, GridData.CENTER, true, false); data.widthHint = convertVerticalDLUsToPixels(50); label.setLayoutData(data); Button clearButton = new Button(dontAskGroup, SWT.PUSH); clearButton.setText(PreferencesMessages.CPluginPreferencePage_clear_button); clearButton.setLayoutData(new GridData(GridData.FILL, GridData.BEGINNING, false, false)); clearButton.addSelectionListener(new SelectionListener() { @Override public void widgetSelected(SelectionEvent e) { OptionalMessageDialog.clearAllRememberedStates(); } @Override public void widgetDefaultSelected(SelectionEvent e) { OptionalMessageDialog.clearAllRememberedStates(); } }); SWTUtil.setButtonDimensionHint(clearButton); Dialog.applyDialogFont(container); return container; } private void addNote(Group parent, String noteMessage) { Composite noteControl = createNoteComposite(JFaceResources.getDialogFont(), parent, PreferencesMessages.CPluginPreferencePage_note, noteMessage); GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL); gd.verticalIndent = GROUP_VINDENT; noteControl.setLayoutData(gd); } @Override protected Composite createNoteComposite(Font font, Composite composite, String title, String message) { Composite messageComposite = super.createNoteComposite(font, composite, title, message); Control[] children = messageComposite.getChildren(); if (children.length == 2 && (children[1] instanceof Label)) { // this is temporary fix for problem that 3 line note does not displayed properly within the group Label messageLabel = (Label) children[1]; GridData gd = new GridData(GridData.FILL_HORIZONTAL); gd.widthHint = 500; messageLabel.setLayoutData(gd); } return messageComposite; } private Group addGroup(Composite parent, String label) { return addGroup(parent, label, 1); } private Group addGroup(Composite parent, String label, int numColumns) { Group group = new Group(parent, SWT.NONE); group.setText(label); group.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); group.setLayout(new GridLayout(numColumns, false)); return group; } private Button addCheckBox(Composite parent, String label, String key) { Button button = new Button(parent, SWT.CHECK); button.setText(label); button.setData(key); button.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL)); button.setSelection(getPreferenceStore().getBoolean(key)); fCheckBoxes.add(button); return button; } protected void addFiller(Composite composite) { PixelConverter pixelConverter = new PixelConverter(composite); Label filler = new Label(composite, SWT.LEFT); GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_FILL); gd.horizontalSpan = 1; gd.heightHint = pixelConverter.convertHeightInCharsToPixels(1) / 2; filler.setLayoutData(gd); } public static boolean isLinkToEditor() { return CUIPlugin.getDefault().getPreferenceStore().getBoolean(PreferenceConstants.PREF_LINK_TO_EDITOR); } public static void setLinkingEnabled(boolean enable) { CUIPlugin.getDefault().getPreferenceStore().setValue(PreferenceConstants.PREF_LINK_TO_EDITOR, enable); } public static boolean useStructuralParseMode() { return CUIPlugin.getDefault().getPreferenceStore() .getBoolean(PreferenceConstants.PREF_USE_STRUCTURAL_PARSE_MODE); } /** * @see IWorkbenchPreferencePage#init */ @Override public void init(IWorkbench workbench) { } /** * Initializes the default values of this page in the preference bundle. */ public static void initDefaults(IPreferenceStore prefs) { prefs.setDefault(PreferenceConstants.PREF_LINK_TO_EDITOR, false); prefs.setDefault(PreferenceConstants.PREF_USE_STRUCTURAL_PARSE_MODE, false); } /* (non-Javadoc) * @see org.eclipse.jface.preference.IPreferencePage#performOk() */ @Override public boolean performOk() { if (!super.performOk()) return false; IPreferenceStore store = getPreferenceStore(); for (int i = 0; i < fCheckBoxes.size(); i++) { Button button = fCheckBoxes.get(i); String key = (String) button.getData(); store.setValue(key, button.getSelection()); } // tell the Core Plugin about this preference CCorePlugin.getDefault().setStructuralParseMode(useStructuralParseMode()); return true; } @Override protected void performDefaults() { super.performDefaults(); IPreferenceStore store = getPreferenceStore(); for (int i = 0; i < fCheckBoxes.size(); i++) { Button button = fCheckBoxes.get(i); String key = (String) button.getData(); button.setSelection(store.getDefaultBoolean(key)); } } }