net.zehrer.no2.editor.TabelEditorPage.java Source code

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Here is the source code for net.zehrer.no2.editor.TabelEditorPage.java

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/*******************************************************************************
 * Copyright (c) 2010 Stephan Zehrer 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:
 *     Stephan Zehrer - initial API and implementation
 *******************************************************************************/

package net.zehrer.no2.editor;

import net.zehrer.no2.model.util.EClassResource;

import org.eclipse.core.runtime.ListenerList;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.emf.common.notify.AdapterFactory;
import org.eclipse.emf.ecore.EAttribute;
import org.eclipse.emf.ecore.EClass;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryContentProvider;
import org.eclipse.emf.edit.ui.provider.AdapterFactoryLabelProvider;
import org.eclipse.jface.util.SafeRunnable;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TableLayout;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.ui.part.IPage;
import org.eclipse.ui.part.Page;

/**
 * This page class covers several things: 
 * - generate the page content, in this case a table 
 * - act as adapter of the corresponding EClass (TODO) for - update
 * ...
 * 
 */
public class TabelEditorPage extends Page implements IPage, ISelectionChangedListener, ISelectionProvider {

    private ListenerList selectionChangedListeners = new ListenerList();

    protected TableViewer tableViewer; // created by createPageControl

    protected Composite container;
    protected ModelEditor modelEditor;
    protected AdapterFactory adapterFactory;

    protected EClassResource classResource;

    public TabelEditorPage(ModelEditor modelEditor, AdapterFactory adapterFactory, EClassResource classResource) {
        this.modelEditor = modelEditor;
        this.adapterFactory = adapterFactory;
        this.classResource = classResource;
    }

    /**
     * @category Page
     */
    @Override
    public void createControl(Composite parent) {

        tableViewer = new TableViewer(parent);

        Table table = tableViewer.getTable();
        TableLayout layout = new TableLayout();
        table.setLayout(layout);
        table.setHeaderVisible(true);
        table.setLinesVisible(true);

        generateTableColumns(table, layout);
        tableViewer.setColumnProperties(new String[] { "a", "b" }); // What's
        // that?

        tableViewer.setContentProvider(new AdapterFactoryContentProvider(this.adapterFactory));
        tableViewer.setLabelProvider(new AdapterFactoryLabelProvider(this.adapterFactory));

        tableViewer.setInput(classResource.getResource());

        // Make sure our popups work.
        modelEditor.createContextMenuFor(tableViewer);

        // add this page as adapter for the class to :
        // - name change -> TODO: how to handle from here?
        // - attribute (name) change -> TODO :)
        // - something else?
        // classResource.getType().eAdapters().add(this); // TODO: add adapter

        // ADD the JFace Viewer as a Selection Provider to the View site.
        modelEditor.getSite().setSelectionProvider(tableViewer);

        // return table;
    }

    /**
     * @category Page
     */
    @Override
    public Control getControl() {
        if (tableViewer == null) {
            return null;
        }
        return tableViewer.getControl();
    }

    /**
     * @category Page
     */
    @Override
    public void setFocus() {
        tableViewer.getControl().setFocus();
    }

    /**
     * @category TabelEditorPage
     */
    protected void generateTableColumns(Table table, TableLayout layout) {

        EClass eClass = this.classResource.getType();

        for (EAttribute attribute : eClass.getEAllAttributes()) {
            TableColumn objectColumn = new TableColumn(table, SWT.NONE);
            layout.addColumnData(new ColumnWeightData(3, 30, true));
            objectColumn.setText(attribute.getName());
            // objectColumn.setResizable(true); <- already set in constructor ->
            // Why again?
        }

    }

    /**
     * @category TabelEditorPage
     */
    public TableViewer getTableViewer() {
        return this.tableViewer;
    }

    /**
     * @category ISelectionChangedListener
     */
    public void selectionChanged(SelectionChangedEvent event) {
        fireSelectionChanged(event.getSelection());
    }

    // ----- ISelectionProvider

    /**
     * Fires a selection changed event.
     * 
     * @param selection
     *            the new selection
     * @category ISelectionProvider
     */
    protected void fireSelectionChanged(ISelection selection) {

        // create an event
        final SelectionChangedEvent event = new SelectionChangedEvent(this, selection);

        // fire the event
        Object[] listeners = selectionChangedListeners.getListeners();
        for (int i = 0; i < listeners.length; ++i) {
            final ISelectionChangedListener l = (ISelectionChangedListener) listeners[i];
            SafeRunner.run(new SafeRunnable() {
                public void run() {
                    l.selectionChanged(event);
                }
            });
        }
    }

    /**
     * @category ISelectionProvider
     */
    public void addSelectionChangedListener(ISelectionChangedListener listener) {
        selectionChangedListeners.add(listener);
    }

    /**
     * @category ISelectionProvider
     */
    public ISelection getSelection() {
        if (tableViewer == null) {
            return StructuredSelection.EMPTY;
        }
        return tableViewer.getSelection();
    }

    /**
     * @category ISelectionProvider
     */
    public void removeSelectionChangedListener(ISelectionChangedListener listener) {
        selectionChangedListeners.remove(listener);
    }

    /**
     * @category ISelectionProvider
     */
    public void setSelection(ISelection selection) {
        if (tableViewer != null) {
            tableViewer.setSelection(selection);
        }
    }

    // ---- AdapterImpl ----
    // TODO: Now how to handel? this is now a subclase of Page

    // @Override
    // public void notifyChanged(Notification notification) {
    //      
    // // if nothing changed ... do nothing
    // //if (notification.isTouch()) return;
    // }

}