Java tutorial
/******************************************************************************* * Copyright (c) 2000, 2005 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.wizards.buildpaths; import java.util.ArrayList; import java.util.List; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.dialogs.StatusDialog; import org.eclipse.jface.viewers.ColumnLayoutData; import org.eclipse.jface.viewers.ColumnPixelData; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.window.Window; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.ui.PlatformUI; import org.eclipse.ui.forms.events.HyperlinkAdapter; import org.eclipse.ui.forms.events.HyperlinkEvent; import org.eclipse.ui.forms.widgets.FormText; import org.eclipse.ui.forms.widgets.FormToolkit; import org.eclipse.ui.preferences.IWorkbenchPreferenceContainer; import descent.core.IAccessRule; import descent.core.IClasspathEntry; import descent.core.IJavaProject; import descent.core.JavaCore; import descent.core.JavaModelException; import descent.internal.corext.util.Messages; import descent.internal.ui.IJavaHelpContextIds; import descent.internal.ui.JavaPlugin; import descent.internal.ui.wizards.NewWizardMessages; import descent.internal.ui.wizards.dialogfields.DialogField; import descent.internal.ui.wizards.dialogfields.IDialogFieldListener; import descent.internal.ui.wizards.dialogfields.IListAdapter; import descent.internal.ui.wizards.dialogfields.LayoutUtil; import descent.internal.ui.wizards.dialogfields.ListDialogField; import descent.internal.ui.wizards.dialogfields.SelectionButtonDialogField; import descent.ui.JavaElementLabels; public class AccessRulesDialog extends StatusDialog { public static final int SWITCH_PAGE = 10; private final ListDialogField fAccessRulesList; private final SelectionButtonDialogField fCombineRulesCheckbox; private final CPListElement fCurrElement; private final IJavaProject fProject; private final boolean fParentCanSwitchPage; private static final int IDX_ADD = 0; private static final int IDX_EDIT = 1; private static final int IDX_UP = 3; private static final int IDX_DOWN = 4; private static final int IDX_REMOVE = 6; public AccessRulesDialog(Shell parent, CPListElement entryToEdit, IJavaProject project, boolean parentCanSwitchPage) { super(parent); setShellStyle(getShellStyle() | SWT.RESIZE); fCurrElement = entryToEdit; fProject = project; // can be null setTitle(NewWizardMessages.AccessRulesDialog_title); fAccessRulesList = createListContents(entryToEdit); fCombineRulesCheckbox = new SelectionButtonDialogField(SWT.CHECK); fCombineRulesCheckbox.setLabelText(NewWizardMessages.AccessRulesDialog_combine_label); fCombineRulesCheckbox .setSelection(Boolean.TRUE.equals(entryToEdit.getAttribute(CPListElement.COMBINE_ACCESSRULES))); fParentCanSwitchPage = parentCanSwitchPage; } private ListDialogField createListContents(CPListElement entryToEdit) { String label = NewWizardMessages.AccessRulesDialog_rules_label; String[] buttonLabels = new String[] { NewWizardMessages.AccessRulesDialog_rules_add, NewWizardMessages.AccessRulesDialog_rules_edit, null, NewWizardMessages.AccessRulesDialog_rules_up, NewWizardMessages.AccessRulesDialog_rules_down, null, NewWizardMessages.AccessRulesDialog_rules_remove }; TypeRestrictionAdapter adapter = new TypeRestrictionAdapter(); AccessRulesLabelProvider labelProvider = new AccessRulesLabelProvider(); ListDialogField patternList = new ListDialogField(adapter, buttonLabels, labelProvider); patternList.setDialogFieldListener(adapter); patternList.setLabelText(label); patternList.setRemoveButtonIndex(IDX_REMOVE); patternList.setUpButtonIndex(IDX_UP); patternList.setDownButtonIndex(IDX_DOWN); patternList.enableButton(IDX_EDIT, false); IAccessRule[] rules = (IAccessRule[]) entryToEdit.getAttribute(CPListElement.ACCESSRULES); ArrayList elements = new ArrayList(rules.length); for (int i = 0; i < rules.length; i++) { elements.add(rules[i]); } patternList.setElements(elements); patternList.selectFirstElement(); return patternList; } protected Control createDialogArea(Composite parent) { Composite composite = (Composite) super.createDialogArea(parent); int maxLabelSize = 0; GC gc = new GC(composite); try { maxLabelSize = gc.textExtent(AccessRulesLabelProvider.getResolutionLabel(IAccessRule.K_ACCESSIBLE)).x; int len2 = gc.textExtent(AccessRulesLabelProvider.getResolutionLabel(IAccessRule.K_DISCOURAGED)).x; if (len2 > maxLabelSize) { maxLabelSize = len2; } int len3 = gc.textExtent(AccessRulesLabelProvider.getResolutionLabel(IAccessRule.K_NON_ACCESSIBLE)).x; if (len3 > maxLabelSize) { maxLabelSize = len3; } } finally { gc.dispose(); } ColumnLayoutData[] columnDta = new ColumnLayoutData[] { new ColumnPixelData(maxLabelSize + 40), new ColumnWeightData(1), }; fAccessRulesList.setTableColumns(new ListDialogField.ColumnsDescription(columnDta, null, false)); Composite inner = new Composite(composite, SWT.NONE); inner.setFont(composite.getFont()); GridLayout layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; layout.numColumns = 2; inner.setLayout(layout); inner.setLayoutData(new GridData(GridData.FILL_BOTH)); Label description = new Label(inner, SWT.WRAP); description.setText(getDescriptionString()); GridData data = new GridData(SWT.FILL, SWT.CENTER, false, false, 2, 1); data.widthHint = convertWidthInCharsToPixels(70); description.setLayoutData(data); fAccessRulesList.doFillIntoGrid(inner, 3); LayoutUtil.setHorizontalSpan(fAccessRulesList.getLabelControl(null), 2); data = (GridData) fAccessRulesList.getListControl(null).getLayoutData(); data.grabExcessHorizontalSpace = true; data.heightHint = SWT.DEFAULT; if (fCurrElement.getEntryKind() == IClasspathEntry.CPE_PROJECT) { fCombineRulesCheckbox.doFillIntoGrid(inner, 2); } if (fProject != null) { String forbiddenSeverity = fProject.getOption(JavaCore.COMPILER_PB_FORBIDDEN_REFERENCE, true); String discouragedSeverity = fProject.getOption(JavaCore.COMPILER_PB_DISCOURAGED_REFERENCE, true); String[] args = { getLocalizedString(discouragedSeverity), getLocalizedString(forbiddenSeverity) }; FormToolkit toolkit = new FormToolkit(parent.getDisplay()); toolkit.setBackground(null); try { FormText text = toolkit.createFormText(composite, true); text.setFont(inner.getFont()); if (fParentCanSwitchPage) { // with link text.setText(Messages.format(NewWizardMessages.AccessRulesDialog_severity_info_with_link, args), true, false); text.addHyperlinkListener(new HyperlinkAdapter() { public void linkActivated(HyperlinkEvent e) { doErrorWarningLinkPressed(); } }); } else { // no link text.setText(Messages.format(NewWizardMessages.AccessRulesDialog_severity_info_no_link, args), true, false); } data = new GridData(SWT.FILL, SWT.CENTER, false, false, 2, 1); data.widthHint = convertWidthInCharsToPixels(70); text.setLayoutData(data); } catch (IllegalArgumentException e) { JavaPlugin.log(e); // invalid string } finally { toolkit.dispose(); } } applyDialogFont(composite); return composite; } final void doErrorWarningLinkPressed() { if (fParentCanSwitchPage && MessageDialog.openQuestion(getShell(), NewWizardMessages.AccessRulesDialog_switch_dialog_title, NewWizardMessages.AccessRulesDialog_switch_dialog_message)) { setReturnCode(SWITCH_PAGE); close(); } } private String getLocalizedString(String severity) { if (JavaCore.ERROR.equals(severity)) { return NewWizardMessages.AccessRulesDialog_severity_error; } else if (JavaCore.WARNING.equals(severity)) { return NewWizardMessages.AccessRulesDialog_severity_warning; } else { return NewWizardMessages.AccessRulesDialog_severity_ignore; } } private String getDescriptionString() { String desc; String name = fCurrElement.getPath().lastSegment(); switch (fCurrElement.getEntryKind()) { case IClasspathEntry.CPE_CONTAINER: try { name = JavaElementLabels.getContainerEntryLabel(fCurrElement.getPath(), fCurrElement.getJavaProject()); } catch (JavaModelException e) { } desc = NewWizardMessages.AccessRulesDialog_container_description; break; case IClasspathEntry.CPE_PROJECT: desc = NewWizardMessages.AccessRulesDialog_project_description; break; default: desc = NewWizardMessages.AccessRulesDialog_description; } return Messages.format(desc, name); } protected void doCustomButtonPressed(ListDialogField field, int index) { if (index == IDX_ADD) { addEntry(field); } else if (index == IDX_EDIT) { editEntry(field); } } protected void doDoubleClicked(ListDialogField field) { editEntry(field); } protected void doSelectionChanged(ListDialogField field) { List selected = field.getSelectedElements(); field.enableButton(IDX_EDIT, canEdit(selected)); } private boolean canEdit(List selected) { return selected.size() == 1; } private void editEntry(ListDialogField field) { List selElements = field.getSelectedElements(); if (selElements.size() != 1) { return; } IAccessRule rule = (IAccessRule) selElements.get(0); AccessRuleEntryDialog dialog = new AccessRuleEntryDialog(getShell(), rule, fCurrElement); if (dialog.open() == Window.OK) { field.replaceElement(rule, dialog.getRule()); } } private void addEntry(ListDialogField field) { AccessRuleEntryDialog dialog = new AccessRuleEntryDialog(getShell(), null, fCurrElement); if (dialog.open() == Window.OK) { field.addElement(dialog.getRule()); } } // -------- TypeRestrictionAdapter -------- private class TypeRestrictionAdapter implements IListAdapter, IDialogFieldListener { /** * @see descent.internal.ui.wizards.dialogfields.IListAdapter#customButtonPressed(descent.internal.ui.wizards.dialogfields.ListDialogField, int) */ public void customButtonPressed(ListDialogField field, int index) { doCustomButtonPressed(field, index); } /** * @see descent.internal.ui.wizards.dialogfields.IListAdapter#selectionChanged(descent.internal.ui.wizards.dialogfields.ListDialogField) */ public void selectionChanged(ListDialogField field) { doSelectionChanged(field); } /** * @see descent.internal.ui.wizards.dialogfields.IListAdapter#doubleClicked(descent.internal.ui.wizards.dialogfields.ListDialogField) */ public void doubleClicked(ListDialogField field) { doDoubleClicked(field); } /** * @see descent.internal.ui.wizards.dialogfields.IDialogFieldListener#dialogFieldChanged(descent.internal.ui.wizards.dialogfields.DialogField) */ public void dialogFieldChanged(DialogField field) { } } protected void doStatusLineUpdate() { } protected void checkIfPatternValid() { } public IAccessRule[] getAccessRules() { List elements = fAccessRulesList.getElements(); return (IAccessRule[]) elements.toArray(new IAccessRule[elements.size()]); } public boolean doCombineAccessRules() { return fCombineRulesCheckbox.isSelected(); } /* * @see org.eclipse.jface.window.Window#configureShell(Shell) */ protected void configureShell(Shell newShell) { super.configureShell(newShell); PlatformUI.getWorkbench().getHelpSystem().setHelp(newShell, IJavaHelpContextIds.ACCESS_RULES_DIALOG); } public void performPageSwitch(IWorkbenchPreferenceContainer pageContainer) { /* TODO JDT UI problem severities preference page HashMap data= new HashMap(); data.put(ProblemSeveritiesPreferencePage.DATA_SELECT_OPTION_KEY, JavaCore.COMPILER_PB_FORBIDDEN_REFERENCE); data.put(ProblemSeveritiesPreferencePage.DATA_SELECT_OPTION_QUALIFIER, JavaCore.PLUGIN_ID); pageContainer.openPage(ProblemSeveritiesPreferencePage.PROP_ID, data); */ } }