Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2006 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 *******************************************************************************/ package descent.internal.ui.preferences.formatter; import java.io.File; import java.util.ArrayList; import java.util.Collection; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.Map; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Platform; import org.eclipse.core.runtime.Status; import org.eclipse.core.runtime.content.IContentType; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; 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.FileDialog; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.TabFolder; import org.eclipse.swt.widgets.TabItem; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.dialogs.IDialogSettings; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.dialogs.StatusDialog; import descent.internal.corext.util.Messages; import descent.ui.JavaUI; import descent.internal.ui.JavaPlugin; import descent.internal.ui.dialogs.StatusInfo; import descent.internal.ui.preferences.formatter.ModifyDialogTabPage.IModificationListener; import descent.internal.ui.preferences.formatter.ProfileManager.CustomProfile; import descent.internal.ui.preferences.formatter.ProfileManager.Profile; import descent.internal.ui.util.ExceptionHandler; import descent.internal.ui.wizards.dialogfields.DialogField; import descent.internal.ui.wizards.dialogfields.IDialogFieldListener; import descent.internal.ui.wizards.dialogfields.StringDialogField; public abstract class ModifyDialog extends StatusDialog implements IModificationListener { /** * The keys to retrieve the preferred area from the dialog settings. */ private static final String DS_KEY_PREFERRED_WIDTH = "modify_dialog.preferred_width"; //$NON-NLS-1$ private static final String DS_KEY_PREFERRED_HEIGHT = "modify_dialog.preferred_height"; //$NON-NLS-1$ private static final String DS_KEY_PREFERRED_X = "modify_dialog.preferred_x"; //$NON-NLS-1$ private static final String DS_KEY_PREFERRED_Y = "modify_dialog.preferred_y"; //$NON-NLS-1$ /** * The key to store the number (beginning at 0) of the tab page which had the * focus last time. */ private static final String DS_KEY_LAST_FOCUS = "modify_dialog.last_focus"; //$NON-NLS-1$ private static final int APPLAY_BUTTON_ID = IDialogConstants.CLIENT_ID; private static final int SAVE_BUTTON_ID = IDialogConstants.CLIENT_ID + 1; private final String fKeyPreferredWidth; private final String fKeyPreferredHight; private final String fKeyPreferredX; private final String fKeyPreferredY; private final String fKeyLastFocus; private final String fLastSaveLoadPathKey; private final ProfileStore fProfileStore; private final boolean fNewProfile; private Profile fProfile; private final Map fWorkingValues; private final List fTabPages; private final IDialogSettings fDialogSettings; private TabFolder fTabFolder; private final ProfileManager fProfileManager; private Button fApplyButton; private Button fSaveButton; private StringDialogField fProfileNameField; public ModifyDialog(Shell parentShell, Profile profile, ProfileManager profileManager, ProfileStore profileStore, boolean newProfile, String dialogPreferencesKey, String lastSavePathKey) { super(parentShell); fProfileStore = profileStore; fLastSaveLoadPathKey = lastSavePathKey; fKeyPreferredWidth = JavaUI.ID_PLUGIN + dialogPreferencesKey + DS_KEY_PREFERRED_WIDTH; fKeyPreferredHight = JavaUI.ID_PLUGIN + dialogPreferencesKey + DS_KEY_PREFERRED_HEIGHT; fKeyPreferredX = JavaUI.ID_PLUGIN + dialogPreferencesKey + DS_KEY_PREFERRED_X; fKeyPreferredY = JavaUI.ID_PLUGIN + dialogPreferencesKey + DS_KEY_PREFERRED_Y; fKeyLastFocus = JavaUI.ID_PLUGIN + dialogPreferencesKey + DS_KEY_LAST_FOCUS; fProfileManager = profileManager; fNewProfile = newProfile; setShellStyle(getShellStyle() | SWT.RESIZE | SWT.MAX); fProfile = profile; setTitle(Messages.format(FormatterMessages.ModifyDialog_dialog_title, profile.getName())); fWorkingValues = new HashMap(fProfile.getSettings()); setStatusLineAboveButtons(false); fTabPages = new ArrayList(); fDialogSettings = JavaPlugin.getDefault().getDialogSettings(); } protected abstract void addPages(Map values); public void create() { super.create(); int lastFocusNr = 0; try { lastFocusNr = fDialogSettings.getInt(fKeyLastFocus); if (lastFocusNr < 0) lastFocusNr = 0; if (lastFocusNr > fTabPages.size() - 1) lastFocusNr = fTabPages.size() - 1; } catch (NumberFormatException x) { lastFocusNr = 0; } if (!fNewProfile) { fTabFolder.setSelection(lastFocusNr); ((ModifyDialogTabPage) fTabFolder.getSelection()[0].getData()).setInitialFocus(); } } protected Control createDialogArea(Composite parent) { final Composite composite = (Composite) super.createDialogArea(parent); Composite nameComposite = new Composite(composite, SWT.NONE); nameComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); nameComposite.setLayout(new GridLayout(3, false)); fProfileNameField = new StringDialogField(); fProfileNameField.setLabelText(FormatterMessages.ModifyDialog_ProfileName_Label); fProfileNameField.setText(fProfile.getName()); fProfileNameField.getLabelControl(nameComposite) .setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); fProfileNameField.getTextControl(nameComposite) .setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); fProfileNameField.setDialogFieldListener(new IDialogFieldListener() { public void dialogFieldChanged(DialogField field) { doValidate(); } }); fSaveButton = createButton(nameComposite, SAVE_BUTTON_ID, FormatterMessages.ModifyDialog_Export_Button, false); fTabFolder = new TabFolder(composite, SWT.NONE); fTabFolder.setFont(composite.getFont()); fTabFolder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); addPages(fWorkingValues); applyDialogFont(composite); fTabFolder.addSelectionListener(new SelectionListener() { public void widgetDefaultSelected(SelectionEvent e) { } public void widgetSelected(SelectionEvent e) { final TabItem tabItem = (TabItem) e.item; final ModifyDialogTabPage page = (ModifyDialogTabPage) tabItem.getData(); // page.fSashForm.setWeights(); fDialogSettings.put(fKeyLastFocus, fTabPages.indexOf(page)); page.makeVisible(); } }); doValidate(); return composite; } public void updateStatus(IStatus status) { if (status == null) { doValidate(); } else { super.updateStatus(status); } } /* (non-Javadoc) * @see org.eclipse.jface.window.Window#getInitialSize() */ protected Point getInitialSize() { Point initialSize = super.getInitialSize(); try { int lastWidth = fDialogSettings.getInt(fKeyPreferredWidth); if (initialSize.x > lastWidth) lastWidth = initialSize.x; int lastHeight = fDialogSettings.getInt(fKeyPreferredHight); if (initialSize.y > lastHeight) lastHeight = initialSize.x; return new Point(lastWidth, lastHeight); } catch (NumberFormatException ex) { } return initialSize; } /* (non-Javadoc) * @see org.eclipse.jface.window.Window#getInitialLocation(org.eclipse.swt.graphics.Point) */ protected Point getInitialLocation(Point initialSize) { try { return new Point(fDialogSettings.getInt(fKeyPreferredX), fDialogSettings.getInt(fKeyPreferredY)); } catch (NumberFormatException ex) { return super.getInitialLocation(initialSize); } } public boolean close() { final Rectangle shell = getShell().getBounds(); fDialogSettings.put(fKeyPreferredWidth, shell.width); fDialogSettings.put(fKeyPreferredHight, shell.height); fDialogSettings.put(fKeyPreferredX, shell.x); fDialogSettings.put(fKeyPreferredY, shell.y); return super.close(); } /* (non-Javadoc) * @see org.eclipse.jface.dialogs.Dialog#okPressed() */ protected void okPressed() { applyPressed(); super.okPressed(); } protected void buttonPressed(int buttonId) { if (buttonId == APPLAY_BUTTON_ID) { applyPressed(); setTitle(Messages.format(FormatterMessages.ModifyDialog_dialog_title, fProfile.getName())); } else if (buttonId == SAVE_BUTTON_ID) { saveButtonPressed(); } else { super.buttonPressed(buttonId); } } private void applyPressed() { if (!fProfile.getName().equals(fProfileNameField.getText())) { fProfile = fProfile.rename(fProfileNameField.getText(), fProfileManager); } fProfile.setSettings(new HashMap(fWorkingValues)); fProfileManager.setSelected(fProfile); doValidate(); } private void saveButtonPressed() { Profile selected = new CustomProfile(fProfileNameField.getText(), new HashMap(fWorkingValues), fProfile.getVersion(), fProfileManager.getProfileVersioner().getProfileKind()); final FileDialog dialog = new FileDialog(getShell(), SWT.SAVE); dialog.setText(FormatterMessages.CodingStyleConfigurationBlock_save_profile_dialog_title); dialog.setFilterExtensions(new String[] { "*.xml" }); //$NON-NLS-1$ final String lastPath = JavaPlugin.getDefault().getDialogSettings().get(fLastSaveLoadPathKey + ".savepath"); //$NON-NLS-1$ if (lastPath != null) { dialog.setFilterPath(lastPath); } final String path = dialog.open(); if (path == null) return; JavaPlugin.getDefault().getDialogSettings().put(fLastSaveLoadPathKey + ".savepath", dialog.getFilterPath()); //$NON-NLS-1$ final File file = new File(path); if (file.exists() && !MessageDialog.openQuestion(getShell(), FormatterMessages.CodingStyleConfigurationBlock_save_profile_overwrite_title, Messages.format( FormatterMessages.CodingStyleConfigurationBlock_save_profile_overwrite_message, path))) { return; } String encoding = ProfileStore.ENCODING; final IContentType type = Platform.getContentTypeManager().getContentType("org.eclipse.core.runtime.xml"); //$NON-NLS-1$ if (type != null) encoding = type.getDefaultCharset(); final Collection profiles = new ArrayList(); profiles.add(selected); try { fProfileStore.writeProfilesToFile(profiles, file, encoding); } catch (CoreException e) { final String title = FormatterMessages.CodingStyleConfigurationBlock_save_profile_error_title; final String message = FormatterMessages.CodingStyleConfigurationBlock_save_profile_error_message; ExceptionHandler.handle(e, getShell(), title, message); } } protected void createButtonsForButtonBar(Composite parent) { fApplyButton = createButton(parent, APPLAY_BUTTON_ID, FormatterMessages.ModifyDialog_apply_button, false); fApplyButton.setEnabled(false); GridLayout layout = (GridLayout) parent.getLayout(); layout.numColumns++; layout.makeColumnsEqualWidth = false; Label label = new Label(parent, SWT.NONE); GridData data = new GridData(); data.widthHint = layout.horizontalSpacing; label.setLayoutData(data); super.createButtonsForButtonBar(parent); } protected final void addTabPage(String title, ModifyDialogTabPage tabPage) { final TabItem tabItem = new TabItem(fTabFolder, SWT.NONE); applyDialogFont(tabItem.getControl()); tabItem.setText(title); tabItem.setData(tabPage); tabItem.setControl(tabPage.createContents(fTabFolder)); fTabPages.add(tabPage); } public void valuesModified() { doValidate(); } protected void updateButtonsEnableState(IStatus status) { super.updateButtonsEnableState(status); if (fApplyButton != null && !fApplyButton.isDisposed()) { fApplyButton.setEnabled(hasChanges() && !status.matches(IStatus.ERROR)); } if (fSaveButton != null && !fSaveButton.isDisposed()) { fSaveButton.setEnabled(!validateProfileName().matches(IStatus.ERROR)); } } private void doValidate() { IStatus status = validateProfileName(); if (status.matches(IStatus.ERROR)) { updateStatus(status); return; } String name = fProfileNameField.getText().trim(); if (!name.equals(fProfile.getName()) && fProfileManager.containsName(name)) { updateStatus(new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, IStatus.ERROR, FormatterMessages.ModifyDialog_Duplicate_Status, null)); return; } if (fProfile.isBuiltInProfile() || fProfile.isSharedProfile()) { updateStatus(new Status(IStatus.INFO, JavaUI.ID_PLUGIN, IStatus.INFO, FormatterMessages.ModifyDialog_NewCreated_Status, null)); return; } updateStatus(StatusInfo.OK_STATUS); } private IStatus validateProfileName() { final String name = fProfileNameField.getText().trim(); if (fProfile.isBuiltInProfile()) { if (fProfile.getName().equals(name)) { return new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, IStatus.ERROR, FormatterMessages.ModifyDialog_BuiltIn_Status, null); } } if (fProfile.isSharedProfile()) { if (fProfile.getName().equals(name)) { return new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, IStatus.ERROR, FormatterMessages.ModifyDialog_Shared_Status, null); } } if (name.length() == 0) { return new Status(IStatus.ERROR, JavaUI.ID_PLUGIN, IStatus.ERROR, FormatterMessages.ModifyDialog_EmptyName_Status, null); } return StatusInfo.OK_STATUS; } private boolean hasChanges() { if (!fProfileNameField.getText().trim().equals(fProfile.getName())) return true; Iterator iter = fProfile.getSettings().entrySet().iterator(); for (; iter.hasNext();) { Map.Entry curr = (Map.Entry) iter.next(); if (!fWorkingValues.get(curr.getKey()).equals(curr.getValue())) { return true; } } return false; } }