Java tutorial
/* * Copyright (C) 2010 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.project; import com.android.ide.eclipse.adt.AdtConstants; import org.eclipse.core.resources.IProject; import org.eclipse.core.resources.ResourcesPlugin; import org.eclipse.core.runtime.IPath; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Path; import org.eclipse.jdt.core.IClasspathEntry; import org.eclipse.jdt.core.IJavaProject; import org.eclipse.jdt.core.JavaCore; import org.eclipse.jdt.internal.ui.dialogs.StatusInfo; import org.eclipse.jdt.internal.ui.dialogs.StatusUtil; import org.eclipse.jdt.ui.wizards.IClasspathContainerPage; import org.eclipse.jdt.ui.wizards.IClasspathContainerPageExtension; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import java.util.Arrays; public class AndroidClasspathContainerPage extends WizardPage implements IClasspathContainerPage, IClasspathContainerPageExtension { private IProject mOwnerProject; private String mLibsProjectName; private Combo mProjectsCombo; private IStatus mCurrStatus; private boolean mPageVisible; public AndroidClasspathContainerPage() { super("AndroidClasspathContainerPage"); //$NON-NLS-1$ mPageVisible = false; mCurrStatus = new StatusInfo(); setTitle("Android Libraries"); setDescription("This container manages classpath entries for Android container"); } @Override public IClasspathEntry getSelection() { IPath path = new Path(AdtConstants.CONTAINER_FRAMEWORK); final int index = this.mProjectsCombo.getSelectionIndex(); if (index != -1) { final String selectedProjectName = this.mProjectsCombo.getItem(index); if (this.mOwnerProject == null || !selectedProjectName.equals(this.mOwnerProject.getName())) { path = path.append(selectedProjectName); } } return JavaCore.newContainerEntry(path); } @Override public void setSelection(final IClasspathEntry cpentry) { final IPath path = cpentry == null ? null : cpentry.getPath(); if (path == null || path.segmentCount() == 1) { if (this.mOwnerProject != null) { this.mLibsProjectName = this.mOwnerProject.getName(); } } else { this.mLibsProjectName = path.segment(1); } } @Override public void createControl(final Composite parent) { final Composite composite = new Composite(parent, SWT.NONE); composite.setLayout(new GridLayout(2, false)); final Label label = new Label(composite, SWT.NONE); label.setText("Project:"); final String[] androidProjects = getAndroidProjects(); this.mProjectsCombo = new Combo(composite, SWT.READ_ONLY); this.mProjectsCombo.setItems(androidProjects); final int index; if (this.mOwnerProject != null) { index = indexOf(androidProjects, this.mLibsProjectName); } else { if (this.mProjectsCombo.getItemCount() > 0) { index = 0; } else { index = -1; } } if (index != -1) { this.mProjectsCombo.select(index); } final GridData gd = new GridData(); gd.grabExcessHorizontalSpace = true; gd.minimumWidth = 100; this.mProjectsCombo.setLayoutData(gd); setControl(composite); } @Override public boolean finish() { return true; } @Override public void setVisible(boolean visible) { super.setVisible(visible); mPageVisible = visible; // policy: wizards are not allowed to come up with an error message if (visible && mCurrStatus.matches(IStatus.ERROR)) { StatusInfo status = new StatusInfo(); status.setError(""); //$NON-NLS-1$ mCurrStatus = status; } updateStatus(mCurrStatus); } /** * Updates the status line and the OK button according to the given status * * @param status status to apply */ protected void updateStatus(IStatus status) { mCurrStatus = status; setPageComplete(!status.matches(IStatus.ERROR)); if (mPageVisible) { StatusUtil.applyToStatusLine(this, status); } } /** * Updates the status line and the OK button according to the status * evaluate from an array of status. The most severe error is taken. In case * that two status with the same severity exists, the status with lower * index is taken. * * @param status the array of status */ protected void updateStatus(IStatus[] status) { updateStatus(StatusUtil.getMostSevere(status)); } @Override public void initialize(final IJavaProject project, final IClasspathEntry[] currentEntries) { this.mOwnerProject = (project == null ? null : project.getProject()); } private static String[] getAndroidProjects() { IProject[] projects = ResourcesPlugin.getWorkspace().getRoot().getProjects(); final String[] names = new String[projects.length]; for (int i = 0; i < projects.length; i++) { names[i] = projects[i].getName(); } Arrays.sort(names); return names; } private static int indexOf(final String[] array, final String str) { for (int i = 0; i < array.length; i++) { if (array[i].equals(str)) { return i; } } return -1; } }