org.eclipse.jface.snippets.viewers.Snippet054NativeControlsInViewers.java Source code

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Here is the source code for org.eclipse.jface.snippets.viewers.Snippet054NativeControlsInViewers.java

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/*******************************************************************************
 * Copyright (c) 2006, 2019 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
 *     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.CellLabelProvider;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TableEditor;
import org.eclipse.swt.events.DisposeListener;
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.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TableItem;

/**
 * Example how to place native controls into a viewer with the new JFace-API
 * because has the potential to eat up all your handles you should think about
 * alternate approaches e.g. taking a screenshot of the control
 *
 * @author Tom Schindl &lt;tom.schindl@bestsolution.at&gt;
 *
 */
public class Snippet054NativeControlsInViewers {

    public class MyModel {
        public int counter;

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

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

    public Snippet054NativeControlsInViewers(Shell shell) {
        final TableViewer viewer = new TableViewer(shell, SWT.BORDER | SWT.FULL_SELECTION);
        viewer.setContentProvider(ArrayContentProvider.getInstance());
        viewer.getTable().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 2, 1));

        TableViewerColumn column = createColumnFor(viewer, "Column 1");
        column.setLabelProvider(new ColumnLabelProvider() {

            @Override
            public String getText(Object element) {
                return element.toString();
            }

        });

        column = createColumnFor(viewer, "Column 2");
        column.setLabelProvider(createCellLabelProvider());

        viewer.setInput(createModel(10));
        viewer.getTable().setLinesVisible(true);
        viewer.getTable().setHeaderVisible(true);

        Button b = createButtonFor(shell, "Modify Input");
        b.addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent e) {
                viewer.setInput(createModel((int) (Math.random() * 10)));
            }

        });

        b = createButtonFor(shell, "Refresh");
        b.addSelectionListener(new SelectionAdapter() {

            @Override
            public void widgetSelected(SelectionEvent e) {
                viewer.refresh();
            }

        });
    }

    private CellLabelProvider createCellLabelProvider() {
        return new CellLabelProvider() {

            @Override
            public void update(ViewerCell cell) {
                final TableItem item = (TableItem) cell.getItem();
                DisposeListener listener = e -> {
                    if (item.getData("EDITOR") != null) {
                        TableEditor editor = (TableEditor) item.getData("EDITOR");
                        editor.getEditor().dispose();
                        editor.dispose();
                    }
                };
                if (item.getData("EDITOR") != null) {
                    TableEditor editor = (TableEditor) item.getData("EDITOR");
                    editor.getEditor().dispose();
                    editor.dispose();
                }
                if (item.getData("DISPOSELISTNER") != null) {
                    item.removeDisposeListener((DisposeListener) item.getData("DISPOSELISTNER"));
                }
                TableEditor editor = new TableEditor(item.getParent());
                item.setData("EDITOR", editor);
                Composite comp = new Composite(item.getParent(), SWT.NONE);
                comp.setBackground(item.getParent().getBackground());
                comp.setBackgroundMode(SWT.INHERIT_DEFAULT);
                RowLayout l = new RowLayout();
                l.marginHeight = 0;
                l.marginWidth = 0;
                l.marginTop = 0;
                l.marginBottom = 0;
                comp.setLayout(l);
                new Button(comp, SWT.RADIO);
                new Button(comp, SWT.RADIO);
                new Button(comp, SWT.RADIO);

                editor.grabHorizontal = true;
                editor.setEditor(comp, item, 1);

                item.addDisposeListener(listener);
                item.setData("DISPOSELISTNER", listener);
            }

        };
    }

    private Button createButtonFor(Shell shell, String label) {
        Button b = new Button(shell, SWT.PUSH);
        b.setText(label);
        b.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        return b;
    }

    private TableViewerColumn createColumnFor(final TableViewer viewer, String columnLabel) {
        TableViewerColumn column = new TableViewerColumn(viewer, SWT.NONE);
        column.getColumn().setWidth(200);
        column.getColumn().setText(columnLabel);
        return column;
    }

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

        for (int i = 0; i < amount; 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 GridLayout(2, true));
        new Snippet054NativeControlsInViewers(shell);
        shell.open();

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

        display.dispose();

    }

}