org.eclipse.rap.incubator.texteditor.demo.wizards.AbstractNewResourceWizardPage.java Source code

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Here is the source code for org.eclipse.rap.incubator.texteditor.demo.wizards.AbstractNewResourceWizardPage.java

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/**
 * <copyright>
 *
 * Copyright (c) 2015 PlugBee. 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:
 *     PlugBee - Initial API and implementation
 *
 * </copyright>
 */
package org.eclipse.rap.incubator.texteditor.demo.wizards;

import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.eclipse.core.runtime.Path;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.rap.incubator.texteditor.demo.ITextEditorDemoConfiguration;
import org.eclipse.rap.incubator.texteditor.demo.internal.Activator;
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;

@SuppressWarnings("serial")
public abstract class AbstractNewResourceWizardPage extends WizardPage {

    private Object[] result;
    private List<IStructuredSelection> selections = new ArrayList<IStructuredSelection>();
    private TreeViewer fViewer;
    protected final String rootPath;

    public TreeViewer getContainerViewer() {
        return fViewer;
    }

    protected AbstractNewResourceWizardPage(String pageName) {
        super(pageName);
        IPreferenceStore store = Activator.getDefault().getPreferenceStore();
        rootPath = store.getDefaultString(ITextEditorDemoConfiguration.WORKSPACE_SETTING);
    }

    protected TreeViewer createViewer(Composite parent) {
        TreeViewer treeViewer = new TreeViewer(parent, SWT.SINGLE | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
        GridData gd = new GridData(GridData.FILL_BOTH);
        gd.widthHint = convertWidthInCharsToPixels(40);
        gd.heightHint = convertHeightInCharsToPixels(15);
        treeViewer.getTree().setLayoutData(gd);

        treeViewer.setLabelProvider(new FileSystemLabelProvider());
        treeViewer.setContentProvider(new FileSystemContentProvider());
        treeViewer.addFilter(new BasicWorkspaceFilter());

        File root = new Path(rootPath).toFile();
        if (!root.exists()) {
            MessageDialog.openError(getShell(), "Error",
                    "The workspace folder of the editor is not properly configured: the folder " + rootPath
                            + " does not exist. Please make sure you have properly created the workspace folder and granted read/write access on it.");
        }
        treeViewer.setInput(root);
        return treeViewer;
    }

    protected void createContainerArea(Composite composite) {
        Composite result = new Composite(composite, SWT.NONE);
        result.setLayout(new GridLayout());
        Label label = new Label(result, SWT.NONE);
        label.setText(rootPath);

        fViewer = createViewer(result);
        GridData data = new GridData(GridData.FILL_BOTH);
        result.setLayoutData(data);
        fViewer.getControl().setLayoutData(data);
        StructuredSelection initialSelection = (StructuredSelection) getSelectedElements().get(0);
        getContainerViewer().setSelection(initialSelection);
        getContainerViewer().setExpandedElements(new Object[] { initialSelection.getFirstElement() });
        getContainerViewer().addSelectionChangedListener(new ISelectionChangedListener() {
            @Override
            public void selectionChanged(SelectionChangedEvent event) {
                viewerSelectionChanged(event);
            }
        });
    }

    protected void viewerSelectionChanged(SelectionChangedEvent event) {
        IStructuredSelection selection = (IStructuredSelection) event.getSelection();
        selections = Collections.singletonList(selection);
    }

    protected List<IStructuredSelection> getSelectedElements() {
        return selections;
    }

    public void setInitialSelections(Object[] selectedElements) {
        selections = new ArrayList<IStructuredSelection>(selectedElements.length);
        for (int i = 0; i < selectedElements.length; i++) {
            selections.add((IStructuredSelection) selectedElements[i]);
        }
    }

    public void setInitialElementSelections(List<IStructuredSelection> selectedElements) {
        selections = selectedElements;
    }

    protected void setResult(List<IStructuredSelection> newResult) {
        if (newResult == null) {
            result = null;
        } else {
            result = new Object[newResult.size()];
            newResult.toArray(result);
        }
    }

    protected void setSelectionResult(Object[] newResult) {
        result = newResult;
    }
}