praktikum-holons/src/holeg/ui/FlowTableWindow.java

package holeg.ui;

import holeg.HolegGateway;
import holeg.HolegPowerFlowContext;

import javax.swing.*;
import java.awt.*;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.nio.charset.StandardCharsets;

public class FlowTableWindow extends JDialog {
    private JTextArea textArea;
    public FlowTableWindow(Frame owner) {
        super(owner);

        setTitle("HOLEG: Power flow table");
        setSize(500, 600);

        textArea = (JTextArea) add(new JTextArea("Updating..."));
    }

    public void update() {
        try (ByteArrayOutputStream stream = new ByteArrayOutputStream()) {
            final String utf8 = StandardCharsets.UTF_8.name();
            try (PrintStream ps = new PrintStream(stream, true, utf8)) {

                for (HolegPowerFlowContext context : HolegGateway.getALlContext()) {
                    synchronized (context.lock) {
                        if (context.result != null && context.problem != null) {
                            context.result.printTo(context.problem, ps, "M");
                        }
                    }
                }
            }
            String data = stream.toString(utf8);
            textArea.setText(data);
        } catch (IOException e) {
            e.printStackTrace();

            textArea.setText(e.toString());
        }
        doLayout();
    }
}