src/plugins/android/src/com/motorola/studio/android/wizards/project/SampleSelectionPage.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * 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.motorola.studio.android.wizards.project;

import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.wizard.IWizardPage;
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.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.ui.PlatformUI;

import com.motorola.studio.android.AndroidPlugin;
import com.motorola.studio.android.adt.Sample;
import com.motorola.studio.android.adt.SdkUtils;
import com.motorola.studio.android.i18n.AndroidNLS;
import com.motorola.studio.android.model.AndroidProject;

/**
 * Sample Selection Wizard Page.
 */
public class SampleSelectionPage extends WizardPage
{
    private TreeViewer treeViewer;

    final private AndroidProject project;

    private Sample selection = null;

    private final String NEW_PROJECT_SAMPLE_HELP = AndroidPlugin.PLUGIN_ID + ".newproj";

    /**
     * Constructor
     * @param project 
     */
    public SampleSelectionPage(AndroidProject project)
    {
        super(AndroidNLS.UI_SampleSelectionPage_TitleSourcePage);
        this.project = project;
        setTitle(AndroidNLS.UI_SampleSelectionPage_WizardTitle);
        setDescription(AndroidNLS.UI_SampleSelectionPage_WizardDescription);
        setPageComplete(true);
    }

    /*
     * (non-Javadoc)
     * @see org.eclipse.jface.dialogs.IDialogPage#createControl(org.eclipse.swt.widgets.Composite)
     */
    public void createControl(Composite parent)
    {
        initializeDialogUnits(parent);
        Composite mainComposite = new Composite(parent, SWT.NONE);
        mainComposite.setLayout(new GridLayout());
        mainComposite.setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, true));
        mainComposite.setLayout(new GridLayout());

        // Samples Tree Label
        Label itemsTableLabel = new Label(mainComposite, SWT.NONE);
        itemsTableLabel.setText(AndroidNLS.UI_SampleSelectionPage_SamplesTreeLabel);

        Composite composite = new Composite(mainComposite, SWT.NONE);
        composite.setLayout(new GridLayout());
        composite.setLayoutData(new GridData(GridData.FILL_BOTH));

        // Samples Tree Viewer
        treeViewer = new TreeViewer(composite, SWT.BORDER | SWT.SINGLE | SWT.V_SCROLL);
        GridData layoutData = new GridData(SWT.FILL, SWT.FILL, true, false);
        layoutData.heightHint = 250;
        treeViewer.getControl().setLayoutData(layoutData);
        treeViewer.setContentProvider(new TreeContentProvider(project));
        treeViewer.setLabelProvider(new TreeLabelProvider());
        treeViewer.setInput(SdkUtils.getCurrentSdk());
        treeViewer.expandAll();
        treeViewer.getTree().addSelectionListener(new SamplesSelectionAdapter(this, project));

        setControl(mainComposite);
        PlatformUI.getWorkbench().getHelpSystem().setHelp(parent, NEW_PROJECT_SAMPLE_HELP);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.dialogs.DialogPage#setVisible(boolean)
     */
    @Override
    public void setVisible(boolean visible)
    {
        if (visible)
        {
            treeViewer.refresh();
            Tree tree = treeViewer.getTree();
            tree.deselectAll();

            if (selection != null)
            {
                for (TreeItem item : treeViewer.getTree().getItems())
                {
                    if (item.getData() instanceof Sample)
                    {
                        Sample sample = (Sample) item.getData();
                        if (sample.getName().equals(selection.getName()))
                        {
                            tree.setSelection(item);
                            tree.select(item);
                            project.setSample(sample);
                            setPageComplete(true);
                        }
                    }
                }
            }
            if ((tree.getSelection().length == 0) && (tree.getItemCount() > 0))
            {
                tree.setSelection(tree.getItem(0));
                tree.select(tree.getItem(0));
                project.setSample((Sample) tree.getItem(0).getData());
                setPageComplete(true);
            }
        }
        else
        {
            selection = project.getSample();
            setPageComplete(false);
        }
        super.setVisible(visible);
        getContainer().updateButtons();
    }

    //returns native page when selected or main page
    @Override
    public IWizardPage getPreviousPage()
    {
        return super.getPreviousPage();
    }

}