org.eclipse.swt.snippets.Snippet216.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet216.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * Tool Tips example snippet: show a tool tip inside a rectangle
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;

public class Snippet216 {
    public static void main(String[] args) {
        Display display = new Display();
        final Color[] colors = { display.getSystemColor(SWT.COLOR_RED), display.getSystemColor(SWT.COLOR_GREEN),
                display.getSystemColor(SWT.COLOR_BLUE), };
        final Rectangle[] rects = { new Rectangle(10, 10, 30, 30), new Rectangle(20, 45, 25, 35),
                new Rectangle(80, 80, 10, 10), };
        final Shell shell = new Shell(display);
        shell.setText("Snippet 216");
        Listener mouseListener = event -> {
            switch (event.type) {
            case SWT.MouseEnter:
            case SWT.MouseMove:
                for (int i = 0; i < rects.length; i++) {
                    if (rects[i].contains(event.x, event.y)) {
                        String text = "ToolTip " + i;
                        if (!(text.equals(shell.getToolTipText()))) {
                            shell.setToolTipText("ToolTip " + i);
                        }
                        return;
                    }
                }
                shell.setToolTipText(null);
                break;
            }
        };
        shell.addListener(SWT.MouseMove, mouseListener);
        shell.addListener(SWT.MouseEnter, mouseListener);
        shell.addListener(SWT.Paint, event -> {
            GC gc = event.gc;
            for (int i = 0; i < rects.length; i++) {
                gc.setBackground(colors[i]);
                gc.fillRectangle(rects[i]);
                gc.drawRectangle(rects[i]);
            }
        });
        shell.setSize(200, 200);
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}