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

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

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/******************************************************************************
 * Copyright (c) 2008 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 org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.core.databinding.beans.BeansObservables;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.ComputedValue;
import org.eclipse.core.databinding.observable.value.IObservableValue;
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.swt.SWT;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Text;

/**
 * A section of the JPS print dialog that adds scaling support.
 * 
 * @author Christian Damus (cdamus)
 * @author James Bruck (jbruck)
 */
class ScalingBlock extends DialogBlock {
    private final DataBindingContext bindings;
    private final PrintOptions options;

    ScalingBlock(IDialogUnitConverter dluConverter, DataBindingContext bindings, PrintOptions options) {
        super(dluConverter);

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

    /*
     * (non-Javadoc)
     * @see org.eclipse.gmf.runtime.common.ui.printing.internal.dialogs.DialogBlock#createContents(org.eclipse.swt.widgets.Composite)
     */
    public Control createContents(Composite parent) {
        final Realm realm = bindings.getValidationRealm();

        Composite result = group(parent, DiagramUIPrintingMessages.JPSPrintDialog_Scaling);
        layout(result, 5);

        Button adjustRadio = radio(result, DiagramUIPrintingMessages.JPSPrintDialog_Adjust);
        layoutSpanHorizontal(adjustRadio, 2);
        Text textScale = text(result, 20);
        layoutSpanHorizontal(blank(result), 2);

        final IObservableValue scalingValue = BeansObservables.observeValue(realm, options,
                PrintOptions.PROPERTY_PERCENT_SCALING);

        bindings.bindValue(SWTObservables.observeSelection(adjustRadio), scalingValue, null, null);

        bindings.bindValue(SWTObservables.observeText(textScale, SWT.Modify),
                BeansObservables.observeValue(realm, options, PrintOptions.PROPERTY_SCALE_FACTOR), null, null);
        bindings.bindValue(SWTObservables.observeEnabled(textScale), scalingValue, null, null);

        Button fitToRadio = radio(result, DiagramUIPrintingMessages.JPSPrintDialog_FitTo);

        IObservableValue fitToValue = new ComputedValue(realm) {
            protected Object calculate() {
                return Boolean.valueOf(!((Boolean) scalingValue.getValue()).booleanValue());
            }
        };

        bindings.bindValue(SWTObservables.observeSelection(fitToRadio), fitToValue, null, null);

        layoutHorizontalIndent(layoutAlignRight(label(result, DiagramUIPrintingMessages.JPSPrintDialog_PagesWide)));

        Text textWide = text(result, 20);

        layoutHorizontalIndent(layoutAlignRight(label(result, DiagramUIPrintingMessages.JPSPrintDialog_PagesTall)));
        Text textTall = text(result, 20);

        bindings.bindValue(SWTObservables.observeText(textWide, SWT.Modify),
                BeansObservables.observeValue(realm, options, PrintOptions.PROPERTY_FIT_TO_WIDTH), null, null);

        bindings.bindValue(SWTObservables.observeEnabled(textWide), fitToValue, null, null);

        bindings.bindValue(SWTObservables.observeText(textTall, SWT.Modify),
                BeansObservables.observeValue(realm, options, PrintOptions.PROPERTY_FIT_TO_HEIGHT), null, null);

        bindings.bindValue(SWTObservables.observeEnabled(textTall), fitToValue, null, null);

        return result;
    }

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