org.eclipse.emf.cdo.internal.ui.dialogs.BulkAddDialog.java Source code

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Here is the source code for org.eclipse.emf.cdo.internal.ui.dialogs.BulkAddDialog.java

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/***************************************************************************
 * Copyright (c) 2004 - 2008 Eike Stepper, Germany.
 * 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:
 *    Eike Stepper - initial API and implementation
 **************************************************************************/
package org.eclipse.emf.cdo.internal.ui.dialogs;

import org.eclipse.net4j.util.ui.StaticContentProvider;
import org.eclipse.net4j.util.ui.UIUtil;

import org.eclipse.emf.ecore.EReference;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IWorkbenchPage;

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

/**
 * @author Eike Stepper
 */
public class BulkAddDialog extends TitleAreaDialog {
    public static final String TITLE = "Bulk Add";

    private IWorkbenchPage page;

    private List<EReference> features = new ArrayList<EReference>();

    private EReference feature;

    private int instances = 100;

    public BulkAddDialog(IWorkbenchPage page, List<EReference> features) {
        super(new Shell(page.getWorkbenchWindow().getShell()));
        setShellStyle(getShellStyle() | SWT.APPLICATION_MODAL | SWT.MAX | SWT.TITLE | SWT.RESIZE);
        this.page = page;
        this.features = features;
    }

    public IWorkbenchPage getPage() {
        return page;
    }

    public List<EReference> getFeatures() {
        return features;
    }

    public EReference getFeature() {
        return feature;
    }

    public int getInstances() {
        return instances;
    }

    @Override
    protected void configureShell(Shell newShell) {
        super.configureShell(newShell);
        newShell.setText(TITLE);
    }

    @Override
    protected Control createDialogArea(Composite parent) {
        Composite composite = new Composite((Composite) super.createDialogArea(parent), SWT.NONE);
        composite.setLayoutData(UIUtil.createGridData());
        composite.setLayout(new GridLayout(2, false));

        setTitle("Select a child type and number of child instances");

        Label label = new Label(composite, SWT.NONE);
        label.setText("Type:");
        label.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false));

        final TableViewer featureViewer = new TableViewer(composite, SWT.BORDER | SWT.SINGLE);
        featureViewer.getTable().setLayoutData(UIUtil.createGridData(true, true));
        featureViewer.setContentProvider(new StaticContentProvider(features));
        featureViewer.setLabelProvider(new LabelProvider() {
            @Override
            public String getText(Object element) {
                return ((EReference) element).getName();
            }
        });

        featureViewer.setInput(features);
        featureViewer.addSelectionChangedListener(new ISelectionChangedListener() {
            public void selectionChanged(SelectionChangedEvent event) {
                IStructuredSelection selection = (IStructuredSelection) featureViewer.getSelection();
                feature = selection.isEmpty() ? null : (EReference) selection.getFirstElement();
                dialogChanged();
            }
        });

        new Label(composite, SWT.NONE).setText("Instances:");
        final Text instancesText = new Text(composite, SWT.BORDER);
        instancesText.setLayoutData(UIUtil.createGridData(true, false));
        instancesText.setText(String.valueOf(instances));
        instancesText.addModifyListener(new ModifyListener() {
            public void modifyText(ModifyEvent e) {
                try {
                    String text = instancesText.getText();
                    instances = Integer.parseInt(text);
                } catch (NumberFormatException ex) {
                    instances = 0;
                }

                dialogChanged();
            }
        });

        return composite;
    }

    @Override
    protected Control createButtonBar(Composite parent) {
        try {
            return super.createButtonBar(parent);
        } finally {
            dialogChanged();
        }
    }

    protected void dialogChanged() {
        getButton(IDialogConstants.OK_ID).setEnabled(false);
        if (feature == null) {
            setErrorMessage("Select a feature");
            return;
        }

        if (instances == 0) {
            setErrorMessage("Enter a valid number of instances (>0)");
            return;
        }

        getButton(IDialogConstants.OK_ID).setEnabled(true);
        setErrorMessage(null);
    }
}