Java tutorial
/* * Copyright (C) 2012 The Android Open Source Project * * Licensed under the Eclipse Public License, Version 1.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.eclipse.org/org/documents/epl-v10.php * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.ide.eclipse.adt.internal.wizards.templates; import com.android.ide.eclipse.adt.AdtPlugin; import com.android.ide.eclipse.adt.internal.wizards.newproject.WorkingSetGroup; import com.android.ide.eclipse.adt.internal.wizards.newproject.WorkingSetHelper; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Platform; import org.eclipse.core.runtime.Status; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.wizard.IWizardPage; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.FocusEvent; import org.eclipse.swt.events.FocusListener; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; 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.DirectoryDialog; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.IWorkingSet; import java.io.File; /** * Second wizard page in the "New Project From Template" wizard */ public class ProjectContentsPage extends WizardPage implements ModifyListener, SelectionListener, FocusListener { private final NewProjectWizardState mValues; private boolean mIgnore; private Button mCustomIconToggle; private Button mLibraryToggle; private Button mUseDefaultLocationToggle; private Label mLocationLabel; private Text mLocationText; private Button mChooseLocationButton; private static String sLastProjectLocation = System.getProperty("user.home"); //$NON-NLS-1$ private Button mCreateActivityToggle; private WorkingSetGroup mWorkingSetGroup; ProjectContentsPage(NewProjectWizardState values) { super("newAndroidApp"); //$NON-NLS-1$ mValues = values; setTitle("New Android Application"); setDescription("Configure Project"); mWorkingSetGroup = new WorkingSetGroup(); setWorkingSets(new IWorkingSet[0]); } @Override public void createControl(Composite parent) { Composite container = new Composite(parent, SWT.NULL); setControl(container); GridLayout gl_container = new GridLayout(4, false); gl_container.horizontalSpacing = 10; container.setLayout(gl_container); mCustomIconToggle = new Button(container, SWT.CHECK); mCustomIconToggle.setSelection(true); mCustomIconToggle.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 4, 1)); mCustomIconToggle.setText("Create custom launcher icon"); mCustomIconToggle.setSelection(mValues.createIcon); mCustomIconToggle.addSelectionListener(this); mCreateActivityToggle = new Button(container, SWT.CHECK); mCreateActivityToggle.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 4, 1)); mCreateActivityToggle.setText("Create activity"); mCreateActivityToggle.setSelection(mValues.createActivity); mCreateActivityToggle.addSelectionListener(this); new Label(container, SWT.NONE).setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 4, 1)); mLibraryToggle = new Button(container, SWT.CHECK); mLibraryToggle.setSelection(true); mLibraryToggle.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 4, 1)); mLibraryToggle.setText("Mark this project as a library"); mLibraryToggle.setSelection(mValues.isLibrary); mLibraryToggle.addSelectionListener(this); // Blank line new Label(container, SWT.NONE).setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 4, 1)); mUseDefaultLocationToggle = new Button(container, SWT.CHECK); mUseDefaultLocationToggle.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 4, 1)); mUseDefaultLocationToggle.setText("Create Project in Workspace"); mUseDefaultLocationToggle.addSelectionListener(this); mLocationLabel = new Label(container, SWT.NONE); mLocationLabel.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1)); mLocationLabel.setText("Location:"); mLocationText = new Text(container, SWT.BORDER); mLocationText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 2, 1)); mLocationText.addModifyListener(this); mChooseLocationButton = new Button(container, SWT.NONE); mChooseLocationButton.setText("Browse..."); mChooseLocationButton.addSelectionListener(this); mChooseLocationButton.setEnabled(false); setUseCustomLocation(!mValues.useDefaultLocation); new Label(container, SWT.NONE).setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false, 4, 1)); Composite group = mWorkingSetGroup.createControl(container); group.setLayoutData(new GridData(SWT.FILL, SWT.FILL, false, false, 4, 1)); } @Override public void setVisible(boolean visible) { super.setVisible(visible); if (visible) { try { mIgnore = true; mUseDefaultLocationToggle.setSelection(mValues.useDefaultLocation); mLocationText.setText(mValues.projectLocation); } finally { mIgnore = false; } } validatePage(); } private void setUseCustomLocation(boolean en) { mValues.useDefaultLocation = !en; mUseDefaultLocationToggle.setSelection(!en); if (!en) { updateProjectLocation(mValues.projectName); } mLocationLabel.setEnabled(en); mLocationText.setEnabled(en); mChooseLocationButton.setEnabled(en); } void init(IStructuredSelection selection, IWorkbenchPart activePart) { setWorkingSets(WorkingSetHelper.getSelectedWorkingSet(selection, activePart)); } /** * Returns the working sets to which the new project should be added. * * @return the selected working sets to which the new project should be added */ private IWorkingSet[] getWorkingSets() { return mWorkingSetGroup.getSelectedWorkingSets(); } /** * Sets the working sets to which the new project should be added. * * @param workingSets the initial selected working sets */ private void setWorkingSets(IWorkingSet[] workingSets) { assert workingSets != null; mWorkingSetGroup.setWorkingSets(workingSets); } @Override public IWizardPage getNextPage() { // Sync working set data to the value object, since the WorkingSetGroup // doesn't let us add listeners to do this lazily mValues.workingSets = getWorkingSets(); return super.getNextPage(); } // ---- Implements ModifyListener ---- @Override public void modifyText(ModifyEvent e) { if (mIgnore) { return; } Object source = e.getSource(); if (source == mLocationText) { mValues.projectLocation = mLocationText.getText().trim(); } validatePage(); } /** If the project should be created in the workspace, then update the project location * based on the project name. */ private void updateProjectLocation(String projectName) { if (projectName == null) { projectName = ""; } boolean useDefaultLocation = mUseDefaultLocationToggle.getSelection(); if (useDefaultLocation) { IPath workspace = Platform.getLocation(); String projectLocation = workspace.append(projectName).toOSString(); mLocationText.setText(projectLocation); mValues.projectLocation = projectLocation; } } // ---- Implements SelectionListener ---- @Override public void widgetSelected(SelectionEvent e) { if (mIgnore) { return; } Object source = e.getSource(); if (source == mCustomIconToggle) { mValues.createIcon = mCustomIconToggle.getSelection(); } else if (source == mLibraryToggle) { mValues.isLibrary = mLibraryToggle.getSelection(); } else if (source == mCreateActivityToggle) { mValues.createActivity = mCreateActivityToggle.getSelection(); } else if (source == mUseDefaultLocationToggle) { boolean useDefault = mUseDefaultLocationToggle.getSelection(); setUseCustomLocation(!useDefault); } else if (source == mChooseLocationButton) { String dir = promptUserForLocation(getShell()); if (dir != null) { mLocationText.setText(dir); mValues.projectLocation = dir; } } validatePage(); } private String promptUserForLocation(Shell shell) { DirectoryDialog dd = new DirectoryDialog(getShell()); dd.setMessage("Select folder where project should be created"); String curLocation = mLocationText.getText().trim(); if (!curLocation.isEmpty()) { dd.setFilterPath(curLocation); } else if (sLastProjectLocation != null) { dd.setFilterPath(sLastProjectLocation); } String dir = dd.open(); if (dir != null) { sLastProjectLocation = dir; } return dir; } @Override public void widgetDefaultSelected(SelectionEvent e) { } // ---- Implements FocusListener ---- @Override public void focusGained(FocusEvent e) { } @Override public void focusLost(FocusEvent e) { } // Validation void validatePage() { IStatus status = validateProjectLocation(); setPageComplete(status == null || status.getSeverity() != IStatus.ERROR); if (status != null) { setMessage(status.getMessage(), status.getSeverity() == IStatus.ERROR ? IMessageProvider.ERROR : IMessageProvider.WARNING); } else { setErrorMessage(null); setMessage(null); } } static IStatus validateLocationInWorkspace(NewProjectWizardState values) { if (values.useDefaultLocation) { return null; } // Validate location if (values.projectName != null) { File dest = Platform.getLocation().append(values.projectName).toFile(); if (dest.exists()) { return new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, String.format( "There is already a file or directory named \"%1$s\" in the selected location.", values.projectName)); } } return null; } private IStatus validateProjectLocation() { if (mValues.useDefaultLocation) { return validateLocationInWorkspace(mValues); } String location = mLocationText.getText(); if (location.trim().isEmpty()) { return new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, "Provide a valid file system location where the project should be created."); } File f = new File(location); if (f.exists()) { if (!f.isDirectory()) { return new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, String.format("'%s' is not a valid folder.", location)); } File[] children = f.listFiles(); if (children != null && children.length > 0) { return new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, String.format("Folder '%s' is not empty.", location)); } } // if the folder doesn't exist, then make sure that the parent // exists and is a writable folder File parent = f.getParentFile(); if (!parent.exists()) { return new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, String.format("Folder '%s' does not exist.", parent.getName())); } if (!parent.isDirectory()) { return new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, String.format("'%s' is not a folder.", parent.getName())); } if (!parent.canWrite()) { return new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, String.format("'%s' is not writeable.", parent.getName())); } return null; } }