Java tutorial
/* This file is part of The Simplicity Engine. The Simplicity Engine is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. The Simplicity Engine is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with The Simplicity Engine. If not, see <http://www.gnu.org/licenses/>. */ package com.se.simplicity.editor.ui.wizards; import org.eclipse.core.resources.IContainer; import org.eclipse.core.resources.IResource; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.Path; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; 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.Label; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.dialogs.ContainerSelectionDialog; /** * <p> * The main page of a wizard that creates a file containing the serialised source representation of an empty {@link com.se.simplicity.scene.Scene * Scene}. * </p> * * @author Gary Buyn */ public class NewSceneWizardPage extends WizardPage { /** * <p> * A text box for the container the {@link com.se.simplicity.scene.Scene Scene} will be created in. * </p> */ private Text fContainerText; /** * <p> * A text box for the file the {@link com.se.simplicity.scene.Scene Scene} will be created in. * </p> */ private Text fFileText; /** * <p> * The selected resource (where the new {@link com.se.simplicity.scene.Scene Scene} will be created by default). * </p> */ private ISelection fSelection; /** * Creates an instance of <code>NewSceneWizardPage</code>. * * @param selection The selected resource (where the new {@link com.se.simplicity.scene.Scene Scene} will be created by default). */ public NewSceneWizardPage(final ISelection selection) { super("wizardPage"); setTitle("Scene"); setDescription("This wizard creates an empty Scene."); this.fSelection = selection; } @Override public void createControl(final Composite parent) { Composite container = new Composite(parent, SWT.NULL); GridLayout layout = new GridLayout(); container.setLayout(layout); layout.numColumns = 3; layout.verticalSpacing = 9; Label label = new Label(container, SWT.NULL); label.setText("&Container:"); fContainerText = new Text(container, SWT.BORDER | SWT.SINGLE); GridData gd = new GridData(GridData.FILL_HORIZONTAL); fContainerText.setLayoutData(gd); fContainerText.addModifyListener(new ModifyListener() { public void modifyText(final ModifyEvent e) { dialogChanged(); } }); Button button = new Button(container, SWT.PUSH); button.setText("Browse..."); button.addSelectionListener(new SelectionAdapter() { public void widgetSelected(final SelectionEvent e) { handleBrowse(); } }); label = new Label(container, SWT.NULL); label.setText("&File name:"); fFileText = new Text(container, SWT.BORDER | SWT.SINGLE); gd = new GridData(GridData.FILL_HORIZONTAL); fFileText.setLayoutData(gd); fFileText.addModifyListener(new ModifyListener() { public void modifyText(final ModifyEvent e) { dialogChanged(); } }); initialize(); dialogChanged(); setControl(container); } /** * Tests if the current workbench selection is a suitable container to use. */ private void initialize() { if (fSelection != null && !fSelection.isEmpty() && fSelection instanceof IStructuredSelection) { IStructuredSelection ssel = (IStructuredSelection) fSelection; if (ssel.size() > 1) { return; } Object obj = ssel.getFirstElement(); if (obj instanceof IResource) { IContainer container; if (obj instanceof IContainer) { container = (IContainer) obj; } else { container = ((IResource) obj).getParent(); } fContainerText.setText(container.getFullPath().toString()); } } fFileText.setText("new_scene.sss"); } /** * Uses the standard container selection dialog to choose the new value for the container field. */ private void handleBrowse() { ContainerSelectionDialog dialog = new ContainerSelectionDialog(getShell(), ResourcesPlugin.getWorkspace().getRoot(), false, "Select new file container"); if (dialog.open() == ContainerSelectionDialog.OK) { Object[] result = dialog.getResult(); if (result.length == 1) { fContainerText.setText(((Path) result[0]).toString()); } } } /** * Ensures that both text fields are set. */ private void dialogChanged() { IResource container = ResourcesPlugin.getWorkspace().getRoot().findMember(new Path(getContainerName())); String fileName = getFileName(); if (getContainerName().length() == 0) { updateStatus("File container must be specified"); return; } if (container == null || (container.getType() & (IResource.PROJECT | IResource.FOLDER)) == 0) { updateStatus("File container must exist"); return; } if (!container.isAccessible()) { updateStatus("Project must be writable"); return; } if (fileName.length() == 0) { updateStatus("File name must be specified"); return; } if (fileName.replace('\\', '/').indexOf('/', 1) > 0) { updateStatus("File name must be valid"); return; } int dotLoc = fileName.lastIndexOf('.'); if (dotLoc != -1) { String ext = fileName.substring(dotLoc + 1); if (!ext.equalsIgnoreCase("sss")) { updateStatus("File extension must be \"sss\""); return; } } updateStatus(null); } /** * <p> * Updates the wizard's status with the given message. * </p> * * @param message The message to update the wizard's status with. */ private void updateStatus(final String message) { setErrorMessage(message); setPageComplete(message == null); } /** * <p> * Retrieves the text box for the container the {@link com.se.simplicity.scene.Scene Scene} will be created in. * </p> * * @return The text box for the container the {@link com.se.simplicity.scene.Scene Scene} will be created in. */ public String getContainerName() { return fContainerText.getText(); } /** * <p> * Retrieves the text box for the file the {@link com.se.simplicity.scene.Scene Scene} will be created in. * </p> * * @return The text box for the file the {@link com.se.simplicity.scene.Scene Scene} will be created in. */ public String getFileName() { return fFileText.getText(); } }