org.eclipse.swt.snippets.Snippet278.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet278.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 tip snippet: show a tool tip iff it's not fully visible
 *
 * 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.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet278 {

    public static void main(String[] args) {
        final Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 278");
        shell.setBounds(10, 10, 300, 100);
        shell.setLayout(new FillLayout());
        final Label label = new Label(shell, SWT.NONE);
        label.setText("resize the Shell then hover over this Label");
        label.addListener(SWT.MouseEnter, event -> {
            Point requiredSize = label.computeSize(SWT.DEFAULT, SWT.DEFAULT);
            Point labelSize = label.getSize();
            boolean fullyVisible = requiredSize.x <= labelSize.x && requiredSize.y <= labelSize.y;
            System.out.println("Label is fully visible: " + fullyVisible);
            label.setToolTipText(fullyVisible ? null : label.getText());
        });
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }

}