org.eclipse.gmf.runtime.diagram.ui.printing.render.dialogs.DiagramPrintRangeBlock.java Source code

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Here is the source code for org.eclipse.gmf.runtime.diagram.ui.printing.render.dialogs.DiagramPrintRangeBlock.java

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/******************************************************************************
 * Copyright (c) 2008, 2014 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 org.eclipse.gmf.runtime.diagram.ui.printing.render.dialogs;

import java.util.List;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.gmf.runtime.diagram.ui.printing.internal.l10n.DiagramUIPrintingMessages;
import org.eclipse.gmf.runtime.diagram.ui.printing.render.model.PrintOptions;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.ListViewer;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;

/**
 * A section of the print dialog that handles selection of diagrams to print.
 * 
 * @author James Bruck (jbruck)
 */
public class DiagramPrintRangeBlock extends DialogBlock {

    private final DataBindingContext bindings;

    private final PrintOptions options;

    private ListViewer diagramList;

    private List<String> availableDiagrams;

    DiagramPrintRangeBlock(IDialogUnitConverter dluConverter, DataBindingContext bindings, PrintOptions options,
            List<String> availableDiagrams) {

        super(dluConverter);

        this.bindings = bindings;
        this.options = options;
        this.availableDiagrams = availableDiagrams;
    }

    /**
     * Create the contents of the diagram selection block. It contains 2 radio
     * buttons for current or multi-selection and a list box of diagram options.
     */
    @Override
    public Control createContents(Composite parent) {

        final Realm realm = bindings.getValidationRealm();

        Composite result = group(parent, DiagramUIPrintingMessages.JPSOptionsDialog_DiagramPrintRange);
        layout(result, 3);

        Button currentDiagramRadio = radio(result, DiagramUIPrintingMessages.JPSOptionsDialog_DiagramPrintCurrent);
        layoutSpanHorizontal(currentDiagramRadio, 4);

        Button selectedDiagramsRadio = radio(result,
                DiagramUIPrintingMessages.JPSOptionsDialog_DiagramPrintSelected);
        layoutSpanHorizontal(selectedDiagramsRadio, 4);

        diagramList = list(result);

        layoutFillHorizontal(layoutHeight(diagramList.getControl(), 48));
        GridData data = getLayoutData(diagramList.getControl());
        data.widthHint = 300;

        diagramList.getControl().setEnabled(options.isDiagramSelection());

        currentDiagramRadio.addSelectionListener(new SelectionListener() {

            public void widgetDefaultSelected(SelectionEvent arg0) {
                //do nothing
            }

            public void widgetSelected(SelectionEvent event) {
                diagramList.getControl().setEnabled(options.isDiagramSelection());
            }
        });

        selectedDiagramsRadio.addSelectionListener(new SelectionListener() {

            public void widgetDefaultSelected(SelectionEvent arg0) {
                //do nothing
            }

            public void widgetSelected(SelectionEvent event) {
                diagramList.getControl().setEnabled(!options.isDiagramCurrent());
            }
        });

        diagramList.addSelectionChangedListener(new ISelectionChangedListener() {

            @SuppressWarnings("unchecked")
            public void selectionChanged(SelectionChangedEvent event) {
                if (event != null) {

                    StructuredSelection selection = (StructuredSelection) event.getSelection();

                    options.setDiagramsToPrint(selection.toList());

                }

            }
        });

        diagramList.setContentProvider(new DiagramContentProvider());
        diagramList.setLabelProvider(new DiagramLabelProvider());

        diagramList.setInput(availableDiagrams);

        bindings.bindValue(SWTObservables.observeSelection(currentDiagramRadio),
                BeansObservables.observeValue(realm, options, PrintOptions.PROPERTY_DIAGRAM_CURRENT), null, null);

        bindings.bindValue(SWTObservables.observeSelection(selectedDiagramsRadio),
                BeansObservables.observeValue(realm, options, PrintOptions.PROPERTY_DIAGRAM_SELECTION), null, null);

        return result;
    }

    @Override
    public void dispose() {
        // nothing special to dispose currently
    }

    /**
     * A helper class used to retrieve label text
     * 
     * @author James Bruck (jbruck)
     */
    private class DiagramContentProvider implements IStructuredContentProvider {
        public Object[] getElements(Object inputElement) {
            return availableDiagrams.toArray();
        }

        public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
            // input never changes
        }

        public void dispose() {
            // nothing to dispose
        }
    }

    private class DiagramLabelProvider extends LabelProvider {
        public String getText(Object element) {
            return (String) element;
        }
    }

}