java - SWT 中未显示外壳

Question

使用 SWT 时我无法显示 Shell。当我作为单独的线程运行代码时，它可以工作。但是，我在 SWT 显示线程上需要它 - 在移动到 SWT 显示线程后，它无法显示。

这是我的代码:

public class TestSetup extends Canvas {

    private Shell shell;

    public void voiceInitialise() {
        Display.getDefault().syncExec(new Runnable() {
            public void run() {
                initializeComponents();
                runEventLoop();
            }
        });
    }

    public void initializeComponents() {
        shell = SWT_AWT.new_Shell(new Display(), this);
    }

    public void runEventLoop() {
        Thread curThread = Thread.currentThread();
        curThread.setName(curThread.getName() + " SWT Dispatch");
        Display display = Display.getDefault();
        testSetup();

        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    }

    public void testSetup() {
        shell.setText("Title");
        GridLayout layout = new GridLayout(2, false);
        shell.setSize(530, 320);
        shell.setLayout(layout);
        shell.open();
    }

    public static void main(String[] args) {
        TestSetup t = new TestSetup();
        t.voiceInitialise();
    }
}

它只是给了我这个异常:“线程“main”org.eclipse.swt.SWTException中的异常:无效的线程访问”

如果有人知道如何解决请告诉我。

Answer 1

正如 GGrec 指出的那样，你的代码相当矫枉过正。

根据您的代码，我假设您正在尝试将 SWT 嵌入到 AWT 中，因此您的类应该如下所示:

import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import org.eclipse.swt.SWT;
import org.eclipse.swt.awt.SWT_AWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;

public class SWTEmbeddedExample {

    public static void main(String[] args) {

        //AWT frame comes here
        Frame frame = new Frame("My AWT Application");
        Canvas parentCanvas = new Canvas();
        frame.add(parentCanvas, BorderLayout.CENTER);
        frame.pack();

        //SWT_AWT bridge
        final Display display = Display.getDefault();
        final Shell shell = SWT_AWT.new_Shell(display, parentCanvas);
        shell.setLayout(new FillLayout(SWT.VERTICAL));

        //SWT label with text and red background
        Label label = new Label(shell, SWT.NONE);
        label.setText("My embedded SWT label");
        label.setBackground(new Color(display, new RGB(255, 0, 0)));

        //AWT frame config goes here
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                e.getWindow().dispose();
                //optionally also dispose display
            }
        });
        frame.setSize(800, 600);
        frame.setVisible(true);

        //ReadAndDispatch display as long as frame is displayed
        while (frame.isDisplayable()) {
            if (!display.readAndDispatch()) {
                display.sleep();
            }
        }
    }
}