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 * Sebastian Davids <sdavids@gmx.de> - bug 97667 [Preferences] Pref Page General/Editors - problems *******************************************************************************/ package org.eclipse.ui.internal.dialogs; import org.eclipse.jface.preference.FieldEditor; import org.eclipse.jface.preference.IPreferenceStore; import org.eclipse.jface.preference.IntegerFieldEditor; import org.eclipse.jface.preference.PreferencePage; import org.eclipse.jface.preference.StringFieldEditor; import org.eclipse.jface.util.IPropertyChangeListener; import org.eclipse.jface.util.PropertyChangeEvent; import org.eclipse.osgi.util.NLS; 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.Group; import org.eclipse.ui.IWorkbench; import org.eclipse.ui.IWorkbenchPreferenceConstants; import org.eclipse.ui.IWorkbenchPreferencePage; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.internal.EditorHistory; import org.eclipse.ui.internal.IPreferenceConstants; import org.eclipse.ui.internal.IWorkbenchHelpContextIds; import org.eclipse.ui.internal.WorkbenchMessages; import org.eclipse.ui.internal.WorkbenchPlugin; import org.eclipse.ui.internal.util.PrefUtil; /** * The Editors preference page of the workbench. */ public class EditorsPreferencePage extends PreferencePage implements IWorkbenchPreferencePage { private static final int REUSE_INDENT = 20; protected Composite editorReuseGroup; private Button reuseEditors; protected Button showMultipleEditorTabs; protected Button useIPersistableEditor; private Composite editorReuseIndentGroup; private Composite editorReuseThresholdGroup; private IntegerFieldEditor reuseEditorsThreshold; private Group dirtyEditorReuseGroup; private Button openNewEditor; private Button promptToReuseEditor; private IntegerFieldEditor recentFilesEditor; private IPropertyChangeListener validityChangeListener = new IPropertyChangeListener() { public void propertyChange(PropertyChangeEvent event) { if (event.getProperty().equals(FieldEditor.IS_VALID)) { updateValidState(); } } }; private Button promptWhenStillOpenEditor; private Button allowInplaceEditor; protected Control createContents(Composite parent) { Composite composite = createComposite(parent); createEditorHistoryGroup(composite); createSpace(composite); createShowMultipleEditorTabsPref(composite); createAllowInplaceEditorPref(composite); createUseIPersistablePref(composite); createPromptWhenStillOpenPref(composite); createEditorReuseGroup(composite); // ((TabBehaviour)Tweaklets.get(TabBehaviour.KEY)).setPreferenceVisibility(editorReuseGroup, // showMultipleEditorTabs); updateValidState(); applyDialogFont(composite); setHelpContext(parent); return composite; } protected void setHelpContext(Composite parent) { // @issue the IDE subclasses this, but should provide its own help PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, IWorkbenchHelpContextIds.WORKBENCH_EDITOR_PREFERENCE_PAGE); } protected void createSpace(Composite parent) { WorkbenchPreferencePage.createSpace(parent); } protected void createShowMultipleEditorTabsPref(Composite composite) { showMultipleEditorTabs = new Button(composite, SWT.CHECK); showMultipleEditorTabs.setText(WorkbenchMessages.WorkbenchPreference_showMultipleEditorTabsButton); showMultipleEditorTabs.setSelection( getAPIPreferenceStore().getBoolean(IWorkbenchPreferenceConstants.SHOW_MULTIPLE_EDITOR_TABS)); setButtonLayoutData(showMultipleEditorTabs); } protected void createAllowInplaceEditorPref(Composite composite) { allowInplaceEditor = new Button(composite, SWT.CHECK); allowInplaceEditor.setText(WorkbenchMessages.WorkbenchPreference_allowInplaceEditingButton); allowInplaceEditor.setSelection( !getAPIPreferenceStore().getBoolean(IWorkbenchPreferenceConstants.DISABLE_OPEN_EDITOR_IN_PLACE)); setButtonLayoutData(allowInplaceEditor); } protected void createUseIPersistablePref(Composite composite) { useIPersistableEditor = new Button(composite, SWT.CHECK); useIPersistableEditor.setText(WorkbenchMessages.WorkbenchPreference_useIPersistableEditorButton); useIPersistableEditor .setSelection(getPreferenceStore().getBoolean(IPreferenceConstants.USE_IPERSISTABLE_EDITORS)); setButtonLayoutData(useIPersistableEditor); } protected void createPromptWhenStillOpenPref(Composite composite) { promptWhenStillOpenEditor = new Button(composite, SWT.CHECK); promptWhenStillOpenEditor.setText(WorkbenchMessages.WorkbenchPreference_promptWhenStillOpenButton); promptWhenStillOpenEditor.setSelection( getAPIPreferenceStore().getBoolean(IWorkbenchPreferenceConstants.PROMPT_WHEN_SAVEABLE_STILL_OPEN)); setButtonLayoutData(promptWhenStillOpenEditor); } protected Composite createComposite(Composite parent) { Composite composite = new Composite(parent, SWT.NULL); GridLayout layout = new GridLayout(); layout.marginWidth = 0; layout.marginHeight = 0; composite.setLayout(layout); composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false)); return composite; } public void init(IWorkbench workbench) { // do nothing } protected void performDefaults() { IPreferenceStore store = getPreferenceStore(); showMultipleEditorTabs.setSelection( getAPIPreferenceStore().getDefaultBoolean(IWorkbenchPreferenceConstants.SHOW_MULTIPLE_EDITOR_TABS)); allowInplaceEditor.setSelection(!getAPIPreferenceStore() .getDefaultBoolean(IWorkbenchPreferenceConstants.DISABLE_OPEN_EDITOR_IN_PLACE)); useIPersistableEditor.setSelection(store.getDefaultBoolean(IPreferenceConstants.USE_IPERSISTABLE_EDITORS)); promptWhenStillOpenEditor.setSelection(getAPIPreferenceStore() .getDefaultBoolean(IWorkbenchPreferenceConstants.PROMPT_WHEN_SAVEABLE_STILL_OPEN)); reuseEditors.setSelection(store.getDefaultBoolean(IPreferenceConstants.REUSE_EDITORS_BOOLEAN)); dirtyEditorReuseGroup.setEnabled(reuseEditors.getSelection()); openNewEditor.setSelection(!store.getDefaultBoolean(IPreferenceConstants.REUSE_DIRTY_EDITORS)); openNewEditor.setEnabled(reuseEditors.getSelection()); promptToReuseEditor.setSelection(store.getDefaultBoolean(IPreferenceConstants.REUSE_DIRTY_EDITORS)); promptToReuseEditor.setEnabled(reuseEditors.getSelection()); reuseEditorsThreshold.loadDefault(); reuseEditorsThreshold.getLabelControl(editorReuseThresholdGroup).setEnabled(reuseEditors.getSelection()); reuseEditorsThreshold.getTextControl(editorReuseThresholdGroup).setEnabled(reuseEditors.getSelection()); recentFilesEditor.loadDefault(); } public boolean performOk() { IPreferenceStore store = getPreferenceStore(); getAPIPreferenceStore().setValue(IWorkbenchPreferenceConstants.SHOW_MULTIPLE_EDITOR_TABS, showMultipleEditorTabs.getSelection()); getAPIPreferenceStore().setValue(IWorkbenchPreferenceConstants.DISABLE_OPEN_EDITOR_IN_PLACE, !allowInplaceEditor.getSelection()); store.setValue(IPreferenceConstants.USE_IPERSISTABLE_EDITORS, useIPersistableEditor.getSelection()); getAPIPreferenceStore().setValue(IWorkbenchPreferenceConstants.PROMPT_WHEN_SAVEABLE_STILL_OPEN, promptWhenStillOpenEditor.getSelection()); // store the reuse editors setting store.setValue(IPreferenceConstants.REUSE_EDITORS_BOOLEAN, reuseEditors.getSelection()); store.setValue(IPreferenceConstants.REUSE_DIRTY_EDITORS, promptToReuseEditor.getSelection()); reuseEditorsThreshold.store(); // store the recent files setting recentFilesEditor.store(); PrefUtil.savePrefs(); return super.performOk(); } /** * Returns preference store that belongs to the our plugin. * * @return the preference store for this plugin */ protected IPreferenceStore doGetPreferenceStore() { return WorkbenchPlugin.getDefault().getPreferenceStore(); } protected IPreferenceStore getAPIPreferenceStore() { return PrefUtil.getAPIPreferenceStore(); } protected void updateValidState() { if (!recentFilesEditor.isValid()) { setErrorMessage(recentFilesEditor.getErrorMessage()); setValid(false); } else if (!reuseEditorsThreshold.isValid()) { setErrorMessage(reuseEditorsThreshold.getErrorMessage()); setValid(false); } else { setErrorMessage(null); setValid(true); } } /** * Create a composite that contains entry fields specifying editor reuse preferences. */ protected void createEditorReuseGroup(Composite composite) { editorReuseGroup = new Composite(composite, SWT.LEFT); GridLayout layout = new GridLayout(); // Line up with other entries in preference page layout.marginWidth = 0; layout.marginHeight = 0; editorReuseGroup.setLayout(layout); editorReuseGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL)); reuseEditors = new Button(editorReuseGroup, SWT.CHECK); reuseEditors.setText(WorkbenchMessages.WorkbenchPreference_reuseEditors); reuseEditors.setLayoutData(new GridData()); IPreferenceStore store = WorkbenchPlugin.getDefault().getPreferenceStore(); reuseEditors.setSelection(store.getBoolean(IPreferenceConstants.REUSE_EDITORS_BOOLEAN)); reuseEditors.addSelectionListener(new SelectionAdapter() { public void widgetSelected(SelectionEvent e) { reuseEditorsThreshold.getLabelControl(editorReuseThresholdGroup) .setEnabled(reuseEditors.getSelection()); reuseEditorsThreshold.getTextControl(editorReuseThresholdGroup) .setEnabled(reuseEditors.getSelection()); dirtyEditorReuseGroup.setEnabled(reuseEditors.getSelection()); openNewEditor.setEnabled(reuseEditors.getSelection()); promptToReuseEditor.setEnabled(reuseEditors.getSelection()); } }); editorReuseIndentGroup = new Composite(editorReuseGroup, SWT.LEFT); GridLayout indentLayout = new GridLayout(); indentLayout.marginLeft = REUSE_INDENT; indentLayout.marginWidth = 0; editorReuseIndentGroup.setLayout(indentLayout); editorReuseIndentGroup.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); editorReuseThresholdGroup = new Composite(editorReuseIndentGroup, SWT.LEFT); layout = new GridLayout(); layout.marginWidth = 0; editorReuseThresholdGroup.setLayout(layout); editorReuseThresholdGroup.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); reuseEditorsThreshold = new IntegerFieldEditor(IPreferenceConstants.REUSE_EDITORS, WorkbenchMessages.WorkbenchPreference_reuseEditorsThreshold, editorReuseThresholdGroup); reuseEditorsThreshold.setPreferenceStore(WorkbenchPlugin.getDefault().getPreferenceStore()); reuseEditorsThreshold.setPage(this); reuseEditorsThreshold.setTextLimit(2); reuseEditorsThreshold.setErrorMessage(WorkbenchMessages.WorkbenchPreference_reuseEditorsThresholdError); reuseEditorsThreshold.setValidateStrategy(StringFieldEditor.VALIDATE_ON_KEY_STROKE); reuseEditorsThreshold.setValidRange(1, 99); reuseEditorsThreshold.load(); reuseEditorsThreshold.getLabelControl(editorReuseThresholdGroup).setEnabled(reuseEditors.getSelection()); reuseEditorsThreshold.getTextControl(editorReuseThresholdGroup).setEnabled(reuseEditors.getSelection()); reuseEditorsThreshold.setPropertyChangeListener(validityChangeListener); dirtyEditorReuseGroup = new Group(editorReuseIndentGroup, SWT.NONE); layout = new GridLayout(); layout.marginWidth = 0; dirtyEditorReuseGroup.setLayout(layout); dirtyEditorReuseGroup.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); dirtyEditorReuseGroup.setText(WorkbenchMessages.WorkbenchPreference_reuseDirtyEditorGroupTitle); dirtyEditorReuseGroup.setEnabled(reuseEditors.getSelection()); promptToReuseEditor = new Button(dirtyEditorReuseGroup, SWT.RADIO); promptToReuseEditor.setText(WorkbenchMessages.WorkbenchPreference_promptToReuseEditor); promptToReuseEditor.setSelection(store.getBoolean(IPreferenceConstants.REUSE_DIRTY_EDITORS)); promptToReuseEditor.setEnabled(reuseEditors.getSelection()); openNewEditor = new Button(dirtyEditorReuseGroup, SWT.RADIO); openNewEditor.setText(WorkbenchMessages.WorkbenchPreference_openNewEditor); openNewEditor.setSelection(!store.getBoolean(IPreferenceConstants.REUSE_DIRTY_EDITORS)); openNewEditor.setEnabled(reuseEditors.getSelection()); } /** * Create a composite that contains entry fields specifying editor history preferences. */ protected void createEditorHistoryGroup(Composite composite) { Composite groupComposite = new Composite(composite, SWT.LEFT); GridLayout layout = new GridLayout(); layout.numColumns = 2; groupComposite.setLayout(layout); GridData gd = new GridData(); gd.horizontalAlignment = GridData.FILL; gd.grabExcessHorizontalSpace = true; groupComposite.setLayoutData(gd); recentFilesEditor = new IntegerFieldEditor(IPreferenceConstants.RECENT_FILES, WorkbenchMessages.WorkbenchPreference_recentFiles, groupComposite); recentFilesEditor.setPreferenceStore(WorkbenchPlugin.getDefault().getPreferenceStore()); recentFilesEditor.setPage(this); recentFilesEditor.setTextLimit(Integer.toString(EditorHistory.MAX_SIZE).length()); recentFilesEditor.setErrorMessage(NLS.bind(WorkbenchMessages.WorkbenchPreference_recentFilesError, new Integer(EditorHistory.MAX_SIZE))); recentFilesEditor.setValidateStrategy(StringFieldEditor.VALIDATE_ON_KEY_STROKE); recentFilesEditor.setValidRange(0, EditorHistory.MAX_SIZE); recentFilesEditor.load(); recentFilesEditor.setPropertyChangeListener(validityChangeListener); } }