Java tutorial
/******************************************************************************* * Copyright (c) 2010 Gyrgy Orosz. * 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: * Gyrgy Orosz - initial API and implementation ******************************************************************************/ package org.erlide.wrangler.refactoring.ui; import java.util.ArrayList; import java.util.Collection; import java.util.List; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.layout.GridData; 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.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeItem; import org.erlide.core.model.erlang.IErlFunction; import org.erlide.core.model.erlang.IErlFunctionClause; import org.erlide.core.model.erlang.IErlModule; import org.erlide.core.model.root.ErlModelException; import org.erlide.core.model.root.IErlElement; import org.erlide.wrangler.refactoring.selection.IErlMemberSelection; import org.erlide.wrangler.refactoring.util.GlobalParameters; import org.erlide.wrangler.refactoring.util.WranglerUtils; /** * Input dialog which shows up all the function clauses in all modules in the * project * * @author Gyorgy Orosz * @version %I%, %G% */ public class RemoteFunctionClauseDialog extends AbstractInputDialog { IErlMemberSelection initianlSelection = (IErlMemberSelection) GlobalParameters.getWranglerSelection(); /** * Sets back the initial Erlide selection */ public void resetSelection() { WranglerUtils.highlightSelection(initianlSelection.getSelectionRange().getOffset(), initianlSelection.getSelectionRange().getLength(), initianlSelection); } /** * Constructor * * @param parentShell * shell * @param title * Dialog title */ public RemoteFunctionClauseDialog(final Shell parentShell, final String title) { super(parentShell, title); } private IErlFunctionClause functionClause = null; @Override protected Control createDialogArea(final Composite parent) { final Composite composite = (Composite) super.createDialogArea(parent); final Tree functionClausesTree; final Label label = new Label(composite, SWT.WRAP); label.setText("Please select the function clause which against should fold!"); final GridData minToksData = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER); minToksData.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH); label.setLayoutData(minToksData); label.setFont(parent.getFont()); functionClausesTree = new Tree(composite, SWT.BORDER); final GridData treeData = new GridData(GridData.GRAB_HORIZONTAL | GridData.GRAB_VERTICAL | GridData.HORIZONTAL_ALIGN_FILL | GridData.VERTICAL_ALIGN_CENTER); treeData.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.MINIMUM_MESSAGE_AREA_WIDTH); functionClausesTree.setLayoutData(treeData); try { final Collection<IErlModule> erlmodules = GlobalParameters.getWranglerSelection().getErlElement() .getProject().getModules(); for (final IErlModule m : erlmodules) { // must refresh the scanner! if (/* !m.isStructureKnown() */true) { // FIXME: not permitted operation m.open(null); } final TreeItem moduleName = new TreeItem(functionClausesTree, 0); moduleName.setText(m.getModuleName()); moduleName.setData(m); final List<IErlFunction> functions = filterFunctions(m.getChildren()); for (final IErlFunction f : functions) { final TreeItem functionName = new TreeItem(moduleName, 0); functionName.setText(f.getNameWithArity()); final List<IErlFunctionClause> clauses = filterClauses(f.getChildren()); functionName.setData(f); for (final IErlFunctionClause c : clauses) { final TreeItem clauseName = new TreeItem(functionName, 0); clauseName.setText(String.valueOf(c.getName())); clauseName.setData(c); } } } // listen to treeitem selection functionClausesTree.addSelectionListener(new SelectionListener() { @Override public void widgetDefaultSelected(final SelectionEvent e) { } // if a function or a function clause is selected, then // highlight it // and store the selection @Override public void widgetSelected(final SelectionEvent e) { final TreeItem[] selectedItems = functionClausesTree.getSelection(); if (selectedItems.length > 0) { final TreeItem treeItem = selectedItems[0]; final Object data = treeItem.getData(); if (data instanceof IErlFunctionClause) { // enable the ok button okButton.setEnabled(true); // highlight WranglerUtils.highlightSelection((IErlFunctionClause) data); // store functionClause = (IErlFunctionClause) data; } else { okButton.setEnabled(false); } } } }); } catch (final ErlModelException e) { e.printStackTrace(); } applyDialogFont(composite); return composite; } protected List<IErlFunctionClause> filterClauses(final Collection<IErlElement> children) { final ArrayList<IErlFunctionClause> clauses = new ArrayList<IErlFunctionClause>(); for (final IErlElement e : children) { if (e instanceof IErlFunctionClause) { clauses.add((IErlFunctionClause) e); } } return clauses; } protected List<IErlFunction> filterFunctions(final Collection<IErlElement> elements) { final ArrayList<IErlFunction> functions = new ArrayList<IErlFunction>(); for (final IErlElement e : elements) { if (e instanceof IErlFunction) { functions.add((IErlFunction) e); } } return functions; } @Override protected void validateInput() { } /** * Returns the selected functionClause if there is. * * @return selected function clause */ public IErlFunctionClause getFunctionClause() { return functionClause; } }