descent.internal.ui.wizards.buildpaths.ClasspathContainerSelectionPage.java Source code

Introduction

Here is the source code for descent.internal.ui.wizards.buildpaths.ClasspathContainerSelectionPage.java

Source

/*******************************************************************************
 * Copyright (c) 2000, 2006 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package descent.internal.ui.wizards.buildpaths;

import java.util.Arrays;

import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.jface.wizard.WizardPage;

import org.eclipse.ui.PlatformUI;

import descent.internal.ui.IJavaHelpContextIds;
import descent.internal.ui.JavaPlugin;
import descent.internal.ui.JavaPluginImages;
import descent.internal.ui.util.SelectionUtil;
import descent.internal.ui.wizards.NewWizardMessages;

/**
  */
public class ClasspathContainerSelectionPage extends WizardPage {

    private static final String DIALOGSTORE_SECTION = "ClasspathContainerSelectionPage"; //$NON-NLS-1$
    private static final String DIALOGSTORE_CONTAINER_IDX = "index"; //$NON-NLS-1$

    private static class ClasspathContainerLabelProvider extends LabelProvider {
        public String getText(Object element) {
            return ((ClasspathContainerDescriptor) element).getName();
        }
    }

    private static class ClasspathContainerSorter extends ViewerSorter {
    }

    private ListViewer fListViewer;
    private ClasspathContainerDescriptor[] fContainers;
    private IDialogSettings fDialogSettings;

    /**
     * Constructor for ClasspathContainerWizardPage.
     * @param containerPages
     */
    protected ClasspathContainerSelectionPage(ClasspathContainerDescriptor[] containerPages) {
        super("ClasspathContainerWizardPage"); //$NON-NLS-1$
        setTitle(NewWizardMessages.ClasspathContainerSelectionPage_title);
        setDescription(NewWizardMessages.ClasspathContainerSelectionPage_description);
        setImageDescriptor(JavaPluginImages.DESC_WIZBAN_ADD_LIBRARY);

        fContainers = containerPages;

        IDialogSettings settings = JavaPlugin.getDefault().getDialogSettings();
        fDialogSettings = settings.getSection(DIALOGSTORE_SECTION);
        if (fDialogSettings == null) {
            fDialogSettings = settings.addNewSection(DIALOGSTORE_SECTION);
            fDialogSettings.put(DIALOGSTORE_CONTAINER_IDX, 0);
        }
        validatePage();
    }

    /* (non-Javadoc)
     * @see IDialogPage#createControl(Composite)
     */
    public void createControl(Composite parent) {
        fListViewer = new ListViewer(parent, SWT.SINGLE | SWT.BORDER);
        fListViewer.setLabelProvider(new ClasspathContainerLabelProvider());
        fListViewer.setContentProvider(new ArrayContentProvider());
        fListViewer.setSorter(new ClasspathContainerSorter());
        fListViewer.setInput(Arrays.asList(fContainers));
        fListViewer.addSelectionChangedListener(new ISelectionChangedListener() {
            public void selectionChanged(SelectionChangedEvent event) {
                validatePage();
            }
        });
        fListViewer.addDoubleClickListener(new IDoubleClickListener() {
            public void doubleClick(DoubleClickEvent event) {
                doDoubleClick();
            }
        });

        int selectionIndex = fDialogSettings.getInt(DIALOGSTORE_CONTAINER_IDX);
        if (selectionIndex >= fContainers.length) {
            selectionIndex = 0;
        }
        fListViewer.getList().select(selectionIndex);
        validatePage();
        setControl(fListViewer.getList());
        Dialog.applyDialogFont(fListViewer.getList());

        PlatformUI.getWorkbench().getHelpSystem().setHelp(parent,
                IJavaHelpContextIds.BP_SELECT_CLASSPATH_CONTAINER);
    }

    /**
     * Method validatePage.
     */
    private void validatePage() {
        setPageComplete(getSelected() != null);
    }

    public ClasspathContainerDescriptor getSelected() {
        if (fListViewer != null) {
            ISelection selection = fListViewer.getSelection();
            return (ClasspathContainerDescriptor) SelectionUtil.getSingleElement(selection);
        }
        return null;
    }

    public ClasspathContainerDescriptor[] getContainers() {
        return fContainers;
    }

    protected void doDoubleClick() {
        if (canFlipToNextPage()) {
            getContainer().showPage(getNextPage());
        }
    }

    /* (non-Javadoc)
     * @see IWizardPage#canFlipToNextPage()
     */
    public boolean canFlipToNextPage() {
        return isPageComplete(); // avoid the getNextPage call to prevent potential plugin load
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.dialogs.IDialogPage#setVisible(boolean)
     */
    public void setVisible(boolean visible) {
        if (!visible && fListViewer != null) {
            fDialogSettings.put(DIALOGSTORE_CONTAINER_IDX, fListViewer.getList().getSelectionIndex());
        }
        super.setVisible(visible);
    }

}