org.eclipse.jface.snippets.window.Snippet031TableStaticTooltip.java Source code

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Here is the source code for org.eclipse.jface.snippets.window.Snippet031TableStaticTooltip.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
 *     Lars Vogel <Lars.Vogel@vogella.com> - Bug 475361
 *******************************************************************************/

package org.eclipse.jface.snippets.window;

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

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.window.DefaultToolTip;
import org.eclipse.jface.window.ToolTip;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TableColumn;

/**
 * Example how one can create a tooltip which is not recreated for every table
 * cell
 *
 * @author Tom Schindl &lt;tom.schindl@bestsolution.at&gt;
 *
 */
public class Snippet031TableStaticTooltip {
    private static Image[] images;

    public class MyModel {
        public int counter;

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

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

    public class MyLabelProvider extends LabelProvider implements ITableLabelProvider {

        @Override
        public Image getColumnImage(Object element, int columnIndex) {
            if (columnIndex == 1) {
                return images[((MyModel) element).counter % 4];
            }
            return null;
        }

        @Override
        public String getColumnText(Object element, int columnIndex) {
            return "Column " + columnIndex + " => " + element;
        }

    }

    public Snippet031TableStaticTooltip(Shell shell) {
        final TableViewer viewer = new TableViewer(shell, SWT.BORDER | SWT.FULL_SELECTION);

        viewer.setLabelProvider(new MyLabelProvider());
        viewer.setContentProvider(ArrayContentProvider.getInstance());

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

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

    /**
     * @param args
     */
    public static void main(String[] args) {
        Display display = new Display();

        images = new Image[] { createImage(display, 0, 0, 255), createImage(display, 0, 255, 255),
                createImage(display, 0, 255, 0), createImage(display, 255, 0, 255) };

        Shell shell = new Shell(display);
        shell.setLayout(new FillLayout());
        new Snippet031TableStaticTooltip(shell);
        shell.open();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        for (Image img : images) {
            img.dispose();
        }
        display.dispose();

    }

    private static Image createImage(Display display, int red, int green, int blue) {
        Color color = new Color(display, red, green, blue);
        Image image = new Image(display, 10, 10);
        GC gc = new GC(image);
        gc.setBackground(color);
        gc.fillRectangle(0, 0, 10, 10);
        gc.dispose();

        return image;
    }

    private void createToolTipFor(final TableViewer viewer) {
        DefaultToolTip toolTip = new DefaultToolTip(viewer.getControl(), ToolTip.NO_RECREATE, false);

        toolTip.setText("Hello World\nHello World");
        toolTip.setBackgroundColor(viewer.getTable().getDisplay().getSystemColor(SWT.COLOR_RED));

        toolTip.setShift(new Point(10, 5));
    }

    private TableColumn createColumnFor(TableViewer viewer, String label) {
        TableColumn column = new TableColumn(viewer.getTable(), SWT.NONE);
        column.setWidth(200);
        column.setText(label);
        return column;
    }

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

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

}