Java tutorial
/* * Copyright (C) 2011 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.newproject; import com.android.SdkConstants; import com.android.ide.eclipse.adt.AdtPlugin; import com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectWizardState.Mode; import com.android.sdklib.IAndroidTarget; import com.android.utils.Pair; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Path; import org.eclipse.core.runtime.Platform; import org.eclipse.core.runtime.Status; import org.eclipse.jface.dialogs.IMessageProvider; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ColumnLabelProvider; import org.eclipse.jface.viewers.IBaseLabelProvider; import org.eclipse.jface.viewers.TableViewer; 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.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.Text; import java.io.File; /** Page where the user can select a sample to "instantiate" */ class SampleSelectionPage extends WizardPage implements SelectionListener, ModifyListener { private final NewProjectWizardState mValues; private boolean mIgnore; private Table mTable; private TableViewer mTableViewer; private IAndroidTarget mCurrentSamplesTarget; private Text mSampleProjectName; /** * Create the wizard. */ SampleSelectionPage(NewProjectWizardState values) { super("samplePage"); //$NON-NLS-1$ setTitle("Select Sample"); setDescription("Select which sample to create"); mValues = values; } /** * Create contents of the wizard. */ @Override public void createControl(Composite parent) { Composite container = new Composite(parent, SWT.NULL); container.setLayout(new GridLayout(2, false)); mTableViewer = new TableViewer(container, SWT.BORDER | SWT.FULL_SELECTION); mTable = mTableViewer.getTable(); GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1); gridData.heightHint = 300; mTable.setLayoutData(gridData); mTable.addSelectionListener(this); setControl(container); Label projectLabel = new Label(container, SWT.NONE); projectLabel.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1)); projectLabel.setText("Project Name:"); mSampleProjectName = new Text(container, SWT.BORDER); mSampleProjectName.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1)); mSampleProjectName.addModifyListener(this); } @Override public void setVisible(boolean visible) { super.setVisible(visible); if (visible) { if (mValues.projectName != null) { try { mIgnore = true; mSampleProjectName.setText(mValues.projectName); } finally { mIgnore = false; } } // Update samples list if the SDK target has changed (or if it hasn't yet // been populated) if (mCurrentSamplesTarget != mValues.target) { mCurrentSamplesTarget = mValues.target; updateSamples(); } validatePage(); } } private void updateSamples() { IBaseLabelProvider labelProvider = new ColumnLabelProvider() { @Override public Image getImage(Object element) { return AdtPlugin.getAndroidLogo(); } @Override public String getText(Object element) { if (element instanceof Pair<?, ?>) { Object name = ((Pair<?, ?>) element).getFirst(); return name.toString(); } return element.toString(); // Fallback. Should not happen. } }; mTableViewer.setContentProvider(new ArrayContentProvider()); mTableViewer.setLabelProvider(labelProvider); if (mValues.samples != null && mValues.samples.size() > 0) { Object[] samples = mValues.samples.toArray(); mTableViewer.setInput(samples); mTable.select(0); selectSample(mValues.samples.get(0).getSecond()); extractNamesFromAndroidManifest(); } } private void selectSample(File sample) { mValues.chosenSample = sample; if (sample != null && !mValues.projectNameModifiedByUser) { mValues.projectName = sample.getName(); if (SdkConstants.FD_SAMPLE.equals(mValues.projectName) && sample.getParentFile() != null) { mValues.projectName = sample.getParentFile().getName() + '_' + mValues.projectName; } try { mIgnore = true; mSampleProjectName.setText(mValues.projectName); } finally { mIgnore = false; } updatedProjectName(); } } @SuppressWarnings("unchecked") @Override public void widgetSelected(SelectionEvent e) { if (mIgnore) { return; } if (e.getSource() == mTable) { extractNamesFromAndroidManifest(); int index = mTable.getSelectionIndex(); if (index >= 0) { Object[] roots = (Object[]) mTableViewer.getInput(); selectSample(((Pair<String, File>) roots[index]).getSecond()); } else { selectSample(null); } } else { assert false : e.getSource(); } validatePage(); } @Override public void widgetDefaultSelected(SelectionEvent e) { } @Override public void modifyText(ModifyEvent e) { if (mIgnore) { return; } if (e.getSource() == mSampleProjectName) { mValues.projectName = mSampleProjectName.getText().trim(); mValues.projectNameModifiedByUser = true; updatedProjectName(); } validatePage(); } private void updatedProjectName() { if (mValues.useDefaultLocation) { mValues.projectLocation = Platform.getLocation().toFile(); } } /** * A sample was selected. Update the location field, manifest and validate. * Extract names from an android manifest. * This is done only if the user selected the "use existing source" and a manifest xml file * can actually be found in the custom user directory. */ private void extractNamesFromAndroidManifest() { if (mValues.chosenSample == null || !mValues.chosenSample.isDirectory()) { return; } Path path = new Path(mValues.chosenSample.getPath()); mValues.extractFromAndroidManifest(path); } @Override public boolean isPageComplete() { if (mValues.mode != Mode.SAMPLE) { return true; } // Ensure that when creating samples, the Finish button isn't enabled until // the user has reached and completed this page if (mValues.chosenSample == null) { return false; } return super.isPageComplete(); } private void validatePage() { IStatus status = null; if (mValues.samples == null || mValues.samples.size() == 0) { status = new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, "The chosen SDK does not contain any samples"); } else if (mValues.chosenSample == null) { status = new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, "Choose a sample"); } else if (!mValues.chosenSample.exists()) { status = new Status(IStatus.ERROR, AdtPlugin.PLUGIN_ID, String.format("Sample does not exist: %1$s", mValues.chosenSample.getPath())); } else { status = ProjectNamePage.validateProjectName(mValues.projectName); } // -- update UI & enable finish if there's no error 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); } } }