at.bestsolution.translate.view.TranslatorComponent.java Source code

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Here is the source code for at.bestsolution.translate.view.TranslatorComponent.java

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/*******************************************************************************
 * Copyright (c) 2010 BestSolution.at 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:
 *     Tom Schindl <tom.schindl@bestsolution.at> - initial API and implementation
 *******************************************************************************/
package at.bestsolution.translate.view;

import java.lang.reflect.InvocationTargetException;

import javax.inject.Inject;

import org.eclipse.core.databinding.beans.PojoProperties;
import org.eclipse.core.databinding.observable.list.IObservableList;
import org.eclipse.core.databinding.observable.list.WritableList;
import org.eclipse.core.databinding.property.list.IListProperty;
import org.eclipse.core.databinding.property.value.IValueProperty;
import org.eclipse.e4.core.di.annotations.Optional;
import org.eclipse.jface.databinding.viewers.ObservableListContentProvider;
import org.eclipse.jface.databinding.viewers.ViewerProperties;
import org.eclipse.jface.viewers.ComboViewer;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

import at.bestsolution.translate.services.ITranslator;
import at.bestsolution.translate.services.ITranslatorProvider;
import at.bestsolution.translate.services.ITranslator.TranslationLanguage;

public class TranslatorComponent {
    private Text term;
    private ComboViewer translator;

    @Inject
    public TranslatorComponent(Composite parent) {
        createUI(parent);
    }

    @Inject
    void setTranslationProvider(@Optional ITranslatorProvider provider) {
        if (provider == null) {
            if (!translator.getControl().isDisposed()) {
                translator.setInput(new WritableList());
            }
        } else {
            translator.setInput(provider.getTranslators());
        }
    }

    private void createUI(Composite parent) {
        GridLayout layout = new GridLayout(2, false);
        parent.setLayout(layout);

        Label l = new Label(parent, SWT.NONE);
        l.setLayoutData(new GridData(GridData.FILL, GridData.BEGINNING, true, false, 2, 1));
        l.setText("Translator");

        l = new Label(parent, SWT.SEPARATOR | SWT.HORIZONTAL);
        l.setLayoutData(new GridData(GridData.FILL, GridData.BEGINNING, true, false, 2, 1));

        l = new Label(parent, SWT.NONE);
        l.setText("Term");

        term = new Text(parent, SWT.BORDER);
        term.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        l = new Label(parent, SWT.NONE);
        l.setText("Translator");

        translator = new ComboViewer(parent);
        translator.getControl().setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        translator.setContentProvider(new ObservableListContentProvider());
        translator.setLabelProvider(new LabelProvider() {
            @Override
            public String getText(Object element) {
                return ((ITranslator) element).getName();
            }
        });

        l = new Label(parent, SWT.NONE);
        l.setText("Source-Language");

        final ComboViewer sourceLanguage = new ComboViewer(parent);
        sourceLanguage.getControl().setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        sourceLanguage.setContentProvider(new ObservableListContentProvider());
        sourceLanguage.setLabelProvider(new LabelProvider() {
            @Override
            public String getText(Object element) {
                return ((TranslationLanguage) element).name;
            }
        });

        IListProperty fromProp = PojoProperties.list("languages");
        IValueProperty selectionProp = ViewerProperties.singleSelection();

        IObservableList input = fromProp.observeDetail(selectionProp.observe(translator));
        sourceLanguage.setInput(input);

        l = new Label(parent, SWT.NONE);
        l.setText("Target-Language");

        final ComboViewer targetLanguage = new ComboViewer(parent);
        targetLanguage.getControl().setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        targetLanguage.setContentProvider(new ObservableListContentProvider());
        targetLanguage.setLabelProvider(new LabelProvider());

        IListProperty targetsProp = PojoProperties.list("targets");

        input = targetsProp.observeDetail(selectionProp.observe(sourceLanguage));
        targetLanguage.setInput(input);

        Button b = new Button(parent, SWT.PUSH);
        b.setText("Translate");
        b.setLayoutData(new GridData(GridData.END, GridData.CENTER, false, false, 2, 1));

        l = new Label(parent, SWT.SEPARATOR | SWT.HORIZONTAL);
        l.setLayoutData(new GridData(GridData.FILL, GridData.CENTER, true, false, 2, 1));

        l = new Label(parent, SWT.NONE);
        l.setText("Translation");

        final Label translation = new Label(parent, SWT.NONE);
        translation.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        b.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                IStructuredSelection transSelection = (IStructuredSelection) translator.getSelection();
                IStructuredSelection sourceSelection = (IStructuredSelection) sourceLanguage.getSelection();
                IStructuredSelection targetSelection = (IStructuredSelection) targetLanguage.getSelection();

                if (!transSelection.isEmpty() && !sourceSelection.isEmpty()) {
                    try {
                        String trans = ((ITranslator) transSelection.getFirstElement()).translate(
                                ((TranslationLanguage) sourceSelection.getFirstElement()).name,
                                (String) targetSelection.getFirstElement(), term.getText());
                        translation.setText(trans);
                    } catch (InvocationTargetException e1) {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    }
                }
            }
        });
    }

    public void setFocus() {
        term.setFocus();
    }
}