org.eclipse.jface.snippets.viewers.Snippet025TabEditing.java Source code

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Here is the source code for org.eclipse.jface.snippets.viewers.Snippet025TabEditing.java

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/*******************************************************************************
 * Copyright (c) 2006, 2015 Tom Schindl and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Tom Schindl - initial API and implementation
 *     Jeanderson Candido <http://jeandersonbc.github.io> - Bug 414565
 *     Simon Scholz <simon.scholz@vogella.com> - Bug 448143
 *     Lars Vogel <Lars.Vogel@vogella.com> - Bug 475361
 *******************************************************************************/

package org.eclipse.jface.snippets.viewers;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.ColumnViewerEditor;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TableViewerEditor;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TableColumn;

/**
 * Edit cell values in a table
 *
 * @author Tom Schindl &lt;tom.schindl@bestsolution.at&gt;
 *
 */
public class Snippet025TabEditing {

    public class MyModel {
        public int counter;

        public MyModel(int counter) {
            this.counter = counter;
        }

        @Override
        public String toString() {
            return "Item " + this.counter;
        }
    }

    public Snippet025TabEditing(Shell shell) {
        final TableViewer viewer = new TableViewer(shell, SWT.BORDER | SWT.FULL_SELECTION);
        viewer.setContentProvider(ArrayContentProvider.getInstance());

        createColumnFor(viewer, "Column 1", 100);
        createColumnFor(viewer, "Column 2", 200);

        TableViewerEditor.create(viewer, new ColumnViewerEditorActivationStrategy(viewer),
                ColumnViewerEditor.TABBING_HORIZONTAL | ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR
                        | ColumnViewerEditor.TABBING_VERTICAL);

        viewer.setInput(createModel());
        viewer.getTable().setLinesVisible(true);
        viewer.getTable().setHeaderVisible(true);
    }

    private void createColumnFor(TableViewer viewer, String label, int width) {
        TableColumn tc = new TableColumn(viewer.getTable(), SWT.NONE);
        tc.setWidth(width);
        tc.setText(label);

        TableViewerColumn viewerColumn = new TableViewerColumn(viewer, tc);
        viewerColumn.setLabelProvider(new ColumnLabelProvider());
        viewerColumn.setEditingSupport(new MyEditingSupport(viewer));
    }

    private List<MyModel> createModel() {
        List<MyModel> elements = new ArrayList<>();

        for (int i = 0; i < 10; i++) {
            elements.add(new MyModel(i));
        }
        return elements;
    }

    /**
     * @param args
     */
    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());
        new Snippet025TabEditing(shell);
        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }

        display.dispose();

    }

    private class MyEditingSupport extends EditingSupport {

        public MyEditingSupport(ColumnViewer viewer) {
            super(viewer);
        }

        @Override
        protected CellEditor getCellEditor(Object element) {
            return new TextCellEditor((Composite) getViewer().getControl());
        }

        @Override
        protected boolean canEdit(Object element) {
            return ((MyModel) element).counter % 2 == 0;
        }

        @Override
        protected Object getValue(Object element) {
            return ((MyModel) element).counter + "";
        }

        @Override
        protected void setValue(Object element, Object value) {
            ((MyModel) element).counter = Integer.parseInt(value.toString());
            getViewer().update(element, null);
        }

    }

}