Java tutorial
/******************************************************************************* * Copyright (c) 2007, 2011 Wind River Systems 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: * Wind River Systems - initial API and implementation *******************************************************************************/ package org.eclipse.cdt.dsf.debug.internal.ui.disassembly.preferences; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.cdt.dsf.debug.internal.ui.disassembly.DisassemblyMessages; import org.eclipse.cdt.dsf.debug.internal.ui.disassembly.IDisassemblyHelpContextIds; import org.eclipse.cdt.dsf.internal.ui.DsfUIPlugin; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridData; 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.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.PlatformUI; /** * DisassemblyPreferencePage */ public class DisassemblyPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { private List<Button> fCheckBoxes = new ArrayList<Button>(); private List<Combo> fComboBoxes = new ArrayList<Combo>(); private ArrayList<Text> fNumberFields = new ArrayList<Text>(); private ModifyListener fNumberFieldListener = new ModifyListener() { @Override public void modifyText(ModifyEvent e) { numberFieldChanged((Text) e.widget); } }; private Combo fAddressFormatCombo; private Combo fOpcodeFormatCombo; private final static String[] fcRadixItems = { DisassemblyMessages.DisassemblyPreferencePage_radix_octal, DisassemblyMessages.DisassemblyPreferencePage_radix_decimal, DisassemblyMessages.DisassemblyPreferencePage_radix_hexadecimal, }; private final static int[] fcRadixValues = { 8, 10, 16 }; /** * Create the Disassembly preference page. */ public DisassemblyPreferencePage() { super(); setPreferenceStore(DsfUIPlugin.getDefault().getPreferenceStore()); } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite) */ @Override public void createControl(Composite parent) { super.createControl(parent); PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), IDisassemblyHelpContextIds.DISASSEMBLY_PREFERENCE_PAGE); } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#createContents(org.eclipse.swt.widgets.Composite) */ @Override protected Control createContents(Composite parent) { Composite composite = new Composite(parent, SWT.NULL); GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; layout.numColumns = 3; composite.setLayout(layout); composite.setFont(parent.getFont()); String label; label = DisassemblyMessages.DisassemblyPreferencePage_addressRadix; fAddressFormatCombo = addComboBox(composite, label, DisassemblyPreferenceConstants.ADDRESS_RADIX, fcRadixItems); fAddressFormatCombo.setToolTipText(DisassemblyMessages.DisassemblyPreferencePage_addressFormatTooltip); label = DisassemblyMessages.DisassemblyPreferencePage_showAddressRadix; Button showRadixCB = addCheckBox(composite, label, DisassemblyPreferenceConstants.SHOW_ADDRESS_RADIX, 0); showRadixCB.setToolTipText(DisassemblyMessages.DisassemblyPreferencePage_showRadixTooltip); label = DisassemblyMessages.DisassemblyPreferencePage_OpcodeFormat; fOpcodeFormatCombo = addComboBox(composite, label, DisassemblyPreferenceConstants.OPCODE_RADIX, fcRadixItems); fOpcodeFormatCombo.setToolTipText(DisassemblyMessages.DisassemblyPreferencePage_OpcodeFormatTooltip); label = DisassemblyMessages.DisassemblyPreferencePage_showSource; Button showSourceCB = addCheckBox(composite, label, DisassemblyPreferenceConstants.SHOW_SOURCE, 0); showSourceCB.setToolTipText(DisassemblyMessages.DisassemblyPreferencePage_showSourceTooltip); label = DisassemblyMessages.DisassemblyPreferencePage_showSymbols; Button showSymbolsCB = addCheckBox(composite, label, DisassemblyPreferenceConstants.SHOW_SYMBOLS, 0); showSymbolsCB.setToolTipText(DisassemblyMessages.DisassemblyPreferencePage_showSymbolsTooltip); Dialog.applyDialogFont(parent); initialize(); return composite; } /* (non-Javadoc) * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench) */ @Override public void init(IWorkbench workbench) { } private Button addCheckBox(Composite parent, String label, String key, int indentation) { Button checkBox = new Button(parent, SWT.CHECK); checkBox.setText(label); GridData gd = new GridData(GridData.FILL_HORIZONTAL); gd.horizontalIndent = indentation; gd.horizontalSpan = 3; checkBox.setLayoutData(gd); checkBox.setData(key); fCheckBoxes.add(checkBox); return checkBox; } private Combo addComboBox(Composite parent, String label, String key, String[] items) { Label labelControl = new Label(parent, SWT.NONE); labelControl.setText(label); GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING); gd.horizontalIndent = 0; gd.horizontalSpan = 2; labelControl.setLayoutData(gd); Combo combo = new Combo(parent, SWT.READ_ONLY); gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING); combo.setLayoutData(gd); combo.setItems(items); combo.setData(key); fComboBoxes.add(combo); return combo; } protected Text addTextField(Composite composite, String label, String key, int textLimit, int indentation, boolean isNumber) { return getTextControl(addLabelledTextField(composite, label, key, textLimit, indentation, isNumber)); } // private static Label getLabelControl(Control[] labelledTextField){ // return (Label)labelledTextField[0]; // } private static Text getTextControl(Control[] labelledTextField) { return (Text) labelledTextField[1]; } /** * Returns an array of size 2: * - first element is of type <code>Label</code> * - second element is of type <code>Text</code> * Use <code>getLabelControl</code> and <code>getTextControl</code> to get the 2 controls. */ private Control[] addLabelledTextField(Composite composite, String label, String key, int textLimit, int indentation, boolean isNumber) { Label labelControl = new Label(composite, SWT.NONE); labelControl.setText(label); GridData gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING); gd.horizontalIndent = indentation; labelControl.setLayoutData(gd); Text textControl = new Text(composite, SWT.BORDER | SWT.SINGLE); gd = new GridData(GridData.HORIZONTAL_ALIGN_BEGINNING); gd.widthHint = convertWidthInCharsToPixels(textLimit + 1); textControl.setLayoutData(gd); textControl.setTextLimit(textLimit); textControl.setData(key); if (isNumber) { fNumberFields.add(textControl); textControl.addModifyListener(fNumberFieldListener); } return new Control[] { labelControl, textControl }; } /* (non-Javadoc) * @see org.eclipse.jface.preference.IPreferencePage#performOk() */ @Override public boolean performOk() { IPreferenceStore store = getPreferenceStore(); for (Iterator<Button> iter = fCheckBoxes.iterator(); iter.hasNext();) { Button btn = iter.next(); store.setValue((String) btn.getData(), btn.getSelection()); } for (Iterator<Text> iter = fNumberFields.iterator(); iter.hasNext();) { Text field = iter.next(); store.setValue((String) field.getData(), Long.decode(field.getText()).longValue()); } for (Iterator<Combo> iter = fComboBoxes.iterator(); iter.hasNext();) { Combo combo = iter.next(); store.setValue((String) combo.getData(), fcRadixValues[combo.getSelectionIndex()]); } return super.performOk(); } /* (non-Javadoc) * @see org.eclipse.jface.preference.PreferencePage#performDefaults() */ @Override protected void performDefaults() { IPreferenceStore store = getPreferenceStore(); for (Iterator<Button> iter = fCheckBoxes.iterator(); iter.hasNext();) { Button btn = iter.next(); btn.setSelection(store.getDefaultBoolean((String) btn.getData())); } for (Iterator<Text> iter = fNumberFields.iterator(); iter.hasNext();) { Text field = iter.next(); long value = store.getDefaultLong((String) field.getData()); field.setText("0x" + Long.toHexString(value)); //$NON-NLS-1$ } for (Iterator<Combo> iter = fComboBoxes.iterator(); iter.hasNext();) { Combo combo = iter.next(); int value = store.getDefaultInt((String) combo.getData()); for (int i = 0; i < fcRadixValues.length; i++) { if (fcRadixValues[i] == value) { combo.select(i); } } } super.performDefaults(); } /** * Initialize widget values from preference store. */ private void initialize() { IPreferenceStore store = getPreferenceStore(); for (Iterator<Button> iter = fCheckBoxes.iterator(); iter.hasNext();) { Button btn = iter.next(); btn.setSelection(store.getBoolean((String) btn.getData())); } for (Iterator<Text> iter = fNumberFields.iterator(); iter.hasNext();) { Text field = iter.next(); long value = store.getLong((String) field.getData()); field.setText("0x" + Long.toHexString(value)); //$NON-NLS-1$ } for (Iterator<Combo> iter = fComboBoxes.iterator(); iter.hasNext();) { Combo combo = iter.next(); int value = store.getInt((String) combo.getData()); for (int i = 0; i < fcRadixValues.length; i++) { if (fcRadixValues[i] == value) { combo.select(i); break; } } } } /** * @param text */ protected void numberFieldChanged(Text text) { try { long value = Long.decode(text.getText()).longValue(); if (value < 0) { setErrorMessage(DisassemblyMessages.DisassemblyPreferencePage_error_negative_number); } else { setErrorMessage(null); } } catch (NumberFormatException nfe) { setErrorMessage(DisassemblyMessages.DisassemblyPreferencePage_error_not_a_number); } } }