org.dslforge.workspace.ui.wizards.AbstractNewResourceWizardPage.java Source code

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Here is the source code for org.dslforge.workspace.ui.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:
 *     Amine Lajmi - Initial API and implementation
 *
 * </copyright>
 */
package org.dslforge.workspace.ui.wizards;

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

import org.dslforge.workspace.WorkspaceManager;
import org.dslforge.workspace.ui.BasicWorkspaceFilter;
import org.dslforge.workspace.ui.FileSystemContentProvider;
import org.dslforge.workspace.ui.FileSystemLabelProvider;
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.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 {

    // the final collection of selected elements, or null if this dialog was
    // canceled
    private Object[] result;

    // a collection of the initially-selected elements
    private List<IStructuredSelection> initialSelections = new ArrayList<IStructuredSelection>();

    private TreeViewer fViewer;

    public TreeViewer getContainerViewer() {
        return fViewer;
    }

    protected AbstractNewResourceWizardPage(String pageName) {
        super(pageName);
    }

    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());
        treeViewer.setInput(WorkspaceManager.INSTANCE.getWorkspaceRootFolder());
        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("&Select the parent folder:");

        fViewer = createViewer(result);
        GridData data = new GridData(GridData.FILL_BOTH);
        result.setLayoutData(data);
        fViewer.getControl().setLayoutData(data);

        StructuredSelection initialSelection = (StructuredSelection) getInitialElementSelections().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();
        initialSelections = Collections.singletonList(selection);
    }

    /**
     * Returns the list of initial element selections.
     * 
     * @return List
     */
    protected List<IStructuredSelection> getInitialElementSelections() {
        return initialSelections;
    }

    /**
     * Sets the initial selection in this selection dialog to the given
     * elements.
     * 
     * @param selectedElements
     *            the array of elements to select
     */
    public void setInitialSelections(Object[] selectedElements) {
        initialSelections = new ArrayList<IStructuredSelection>(selectedElements.length);
        for (int i = 0; i < selectedElements.length; i++) {
            initialSelections.add((IStructuredSelection) selectedElements[i]);
        }
    }

    /**
     * Sets the initial selection in this selection dialog to the given
     * elements.
     * 
     * @param selectedElements
     *            the List of elements to select
     */
    public void setInitialElementSelections(List<IStructuredSelection> selectedElements) {
        initialSelections = selectedElements;
    }

    /**
     * Set the selections made by the user, or <code>null</code> if the
     * selection was canceled.
     * 
     * @param newResult
     *            list of selected elements, or <code>null</code> if Cancel was
     *            pressed
     */
    protected void setResult(List<IStructuredSelection> newResult) {
        if (newResult == null) {
            result = null;
        } else {
            result = new Object[newResult.size()];
            newResult.toArray(result);
        }
    }

    /**
     * Set the selections made by the user, or <code>null</code> if the
     * selection was canceled.
     * <p>
     * The selections may accessed using <code>getResult</code>.
     * </p>
     * 
     * @param newResult
     *            - the new values
     */
    protected void setSelectionResult(Object[] newResult) {
        result = newResult;
    }
}