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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
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import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Frame;
import java.awt.Graphics;

/*
 * @test
 * @bug 4023385
 * @summary resizing a frame causes too many repaints
 * @library /java/awt/regtesthelpers
 * @build PassFailJFrame
 * @run main/manual FramePaintTest
*/

public class FramePaintTest {
    private static final String INSTRUCTIONS = """
            You should see a Frame titled "Repaint Test", filled with colored blocks.

            Resize the frame several times, both inward as well as outward.

            The blocks should move to fill the window without any flashes or
            glitches which ensures that repaint is not done excessively
            """;

    public static void main(String[] args) throws Exception {
        PassFailJFrame.builder()
                .title("FramePaintTest Instructions")
                .instructions(INSTRUCTIONS)
                .columns(45)
                .testUI(ResizeLW::new)
                .build()
                .awaitAndCheck();
    }

    static class ResizeLW extends Frame {

        public ResizeLW() {
            super("Repaint Test");
            setBackground(Color.red);
            setLayout(new FlowLayout());
            setSize(300, 300);

            for (int i = 0; i < 10; i++) {
                add(new ColorComp(Color.blue));
                add(new ColorComp(Color.green));
            }
        }

        private static class ColorComp extends Component {
            public ColorComp(Color c) {
                super();
                setBackground(c);
            }

            public void paint(Graphics g) {
                g.setColor(getBackground());
                g.fillRect(0, 0, getWidth(), getHeight());
            }

            public Dimension getPreferredSize() {
                return new Dimension(50, 50);
            }
        }
    }
}