org.eclipse.eatop.workspace.ui.internal.preferences.ModelConverterDescriptionLabels.java Source code

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Here is the source code for org.eclipse.eatop.workspace.ui.internal.preferences.ModelConverterDescriptionLabels.java

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/**
 * <copyright>
 * 
 * Copyright (c) 2014 Continental AG and others.
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 
 * which accompanies this distribution, and is
 * available at http://www.eclipse.org/org/documents/epl-v10.php
 * 
 * Contributors: 
 *     Continental AG - Initial API and implementation
 * 
 * </copyright>
 */
package org.eclipse.eatop.workspace.ui.internal.preferences;

import org.eclipse.eatop.workspace.ui.internal.messages.Messages;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.sphinx.emf.resource.IModelConverter;
import org.eclipse.sphinx.emf.resource.IModelConverterDescription;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ControlAdapter;
import org.eclipse.swt.events.ControlEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;

/**
 * A widget for displaying the description of an {@link IModelConverter}.
 */
public class ModelConverterDescriptionLabels extends Composite {

    private static class Section {
        Label icon;
        Label title;
        Label content;
    }

    private static final String WARNING_TITLE_TEXT = Messages.Warning_TitleText;
    private static final String DESC_TITLE_TEXT = Messages.Description_TitleText;

    private static final IModelConverterDescription NULL_DESCRIPTION = new IModelConverterDescription() {
        @Override
        public boolean isEmpty() {
            return false;
        }

        @Override
        public boolean hasWarning() {
            return false;
        }

        @Override
        public boolean hasBehaviorDetails() {
            return false;
        }

        @Override
        public String getWarning() {
            return null;
        }

        @Override
        public String getBehaviorDetails() {
            return null;
        }
    };

    private Section fWarning;
    private Section fDescription;

    /**
     * Creates a new ModelConverterDescriptionLabels instance
     * 
     * @param parent
     *            a widget which will be the parent of the new instance (cannot be null)
     */
    public ModelConverterDescriptionLabels(Composite parent) {
        super(parent, SWT.NONE);
        GridLayout gridLayout = new GridLayout(2, false);
        setLayout(gridLayout);

        fWarning = createNewSection(Dialog.DLG_IMG_MESSAGE_WARNING, WARNING_TITLE_TEXT);
        fDescription = createNewSection(Dialog.DLG_IMG_MESSAGE_INFO, DESC_TITLE_TEXT);

        setConverterDescription(null);
    }

    private Section createNewSection(String iconSymbolicName, String titleText) {
        Section section = new Section();
        section.icon = createIcon(iconSymbolicName);
        section.title = createTitle(titleText);
        section.content = createContent();
        return section;
    }

    private Label createIcon(String imageKey) {
        Label icon = new Label(this, SWT.SHADOW_NONE);
        icon.setImage(JFaceResources.getImage(imageKey));
        return icon;
    }

    private Label createTitle(String titleText) {
        Label title = new Label(this, SWT.SHADOW_NONE);
        title.setText(titleText);
        FontData[] fontData = title.getFont().getFontData();
        fontData[0].setStyle(SWT.BOLD);
        title.setFont(new Font(getDisplay(), fontData[0]));
        return title;
    }

    private Label createContent() {
        Label dummy = new Label(this, SWT.NONE); // Fill first column to skip
        // it.
        setSizeHints(dummy, 0, 0);
        final Label content = new Label(this, SWT.READ_ONLY | SWT.WRAP);
        GridData gridData = new GridData(SWT.FILL, SWT.TOP, true, false);
        content.setLayoutData(gridData);

        getParent().addControlListener(new ControlAdapter() {
            @Override
            public void controlResized(ControlEvent e) {
                Point size = content.computeSize(getSize().x, SWT.DEFAULT, true);
                setSizeHints(content, size.x, size.y);

                resize();
            }
        });

        return content;
    }

    public void setConverterDescription(IModelConverterDescription converterDescription) {
        if (converterDescription == null) {
            converterDescription = NULL_DESCRIPTION;
        }

        update(fWarning, converterDescription.getWarning());
        update(fDescription, converterDescription.getBehaviorDetails());

        GridLayout gridLayout = (GridLayout) getLayout();
        if (converterDescription.hasWarning() == false || converterDescription.hasBehaviorDetails() == false) {
            gridLayout.verticalSpacing = 0;
        } else {
            gridLayout.verticalSpacing = 5;
        }

        resize();
    }

    private void update(Section section, String content) {
        if (content != null) {
            section.content.setText(content);
            setSizeHints(section.icon, SWT.DEFAULT, SWT.DEFAULT);
            setSizeHints(section.title, SWT.DEFAULT, SWT.DEFAULT);
            Point size = section.content.computeSize(getSize().x, SWT.DEFAULT, true);
            setSizeHints(section.content, size.x, size.y);
        } else {
            section.content.setText(""); //$NON-NLS-1$
            setSizeHints(section.icon, 0, 0);
            setSizeHints(section.title, 0, 0);
            setSizeHints(section.content, 0, 0);
        }
    }

    private void setSizeHints(Label label, int width, int height) {
        GridData gridData = (GridData) label.getLayoutData();
        if (gridData == null) {
            gridData = new GridData();
        }
        gridData.widthHint = width;
        gridData.heightHint = height;
        label.setLayoutData(gridData);
    }

    private void resize() {
        // explicitly set our size since we are the contents of a ScrolledComposite which expects this
        setSize(computeSize(getParent().getClientArea().width, SWT.DEFAULT));
    }
}