使用 Java RCP 和 SWT 打开一个新窗口 [英] Opening a new Window with Java RCP and SWT

问题描述

我目前正在开发一个应用程序，为此，我将 Java RCP 与 SWT 结合使用.

我想要的:

我有一个窗口，当我点击一个按钮时，我需要打开一个完整的窗口.该窗口完美运行，如下所示:

Window1

当我按下它时，会打开一个新窗口.它看起来像这样:

Window2(是的，中间的图片很重要)

目前是如何完成的:

窗口 1 是使用 Application.e4xmi 完成的 TrimmedWindow，其中包含一些部件.按钮包含在这些部件之一中.这是它的代码:

@PostConstruct公共无效postConstruct(复合父){Button b = new Button(parent, SWT.BORDER);b.setText("按我！");b.addListener(SWT.Selection, new Listener() {@覆盖公共无效handleEvent(事件事件){parent.getShell().dispose();新游戏(Display.getCurrent());}});}

如您所见，Window 2 是一个名为 Game 的新类.它的构造函数如下:

public Game(Display display) {this.display = 显示；this.shell = new Shell(this.display);this.setData();shell.setText("我工作不正常");shell.setMinimumSize(800, 600);this.buildUI();shell.pack();壳.open();而 (!shell.isDisposed()) {if (!this.display.readAndDispatch()) this.display.sleep();}this.display.dispose();}

有什么问题?:

当我用 Eclipse 启动项目时，一切都很好.我的意思是，真的.我点击，它打开，它加载，耶！但此后的想法是我将项目导出为可执行文件.所以我这样做.这是我的 .exe 文件.让我们开始吧.它不起作用.当我按下按钮时，没有任何反应.甚至没有错误消息，什么都没有.

我找到了一些解决方案，表明问题出在显示器上，因为 RCP 是单线程的.所以我按照说明操作，这是游戏构造函数的另一个版本:

公共游戏(){this.display = Display.getDefault();this.display.asyncExec(new Runnable() {@覆盖公共无效运行(){外壳 = 新外壳(显示)；设置数据()；shell.setText("我工作得更好，但...");shell.setMinimumSize(800, 600);构建UI();shell.pack();壳.open();而 (!shell.isDisposed()) {if (!display.readAndDispatch()) display.sleep();}display.dispose();}});}

所以出现了新问题:在此之后我无法调用图像(因此我在窗口 2 上显示了图片).因为 Image (SWT) 需要构造一个显示，并且因为如果没有 Runnable 实例，显示就不能很好地工作，所以在此之后我不能使用图像.我需要我的图像在这里(以及此后的其他地方).

在这种情况下我有一条错误消息.它说:

<块引用>

org.eclipse.swt.SWTException : 无法执行 runnable(java.lang.IllegalArgumentException : 参数不能为空)

请问大家有什么解决办法吗?

提前致谢.

科斯尼鲁.

解决方案

如果您在 Application.e4xmi 的Windows and Dialogs"部分添加了一个 Trimmed Window(或只是一个普通的 Window)并打开了To Be Rendered"关闭(保持可见)然后你可以使用:

@InjectEModelService 模型服务；@注入M应用程序；MUIElement window = modelService.find("window id", app);window.setToBeRendered(true);

I'm currently developing an app, and for this, I'm using Java RCP with SWT.

What I want :

I have a window, and when I click on a Button, i need a whole window to be opened. The window works perfectly and looks like this :

Window1

When I press it, a new window opens. It looks like this :

Window2 (Yup, the middle pic has its importance)

How it's currently done :

The Window 1 is a TrimmedWindow done with the Application.e4xmi, with some Parts in. The button is included in one of these parts. Here's its code :

@PostConstruct
public void postConstruct(Composite parent) {
    Button b = new Button(parent, SWT.BORDER);  
    b.setText("Press me !");
    b.addListener(SWT.Selection, new Listener() {

        @Override
        public void handleEvent(Event event) {
            parent.getShell().dispose();
            new Game(Display.getCurrent());
        }
    });
}

The Window 2, as you can see, is a new class called Game. Its constructor is as follows :

public Game(Display display) {
    this.display = display;
    this.shell = new Shell(this.display);
    this.setData();
    shell.setText("I don't work properly");
    shell.setMinimumSize(800, 600);

    this.buildUI();

    shell.pack();
    shell.open();

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

What's the problem ? :

When I launch the project with Eclipse, everything goes WELL. I mean, really. I click, it opens, it loads, yay ! But the idea after this is I export the project as an executable. So I do it. Here's my .exe file. And let's start. And it doesn't work. When I press the button, nothing happens. Not even an error message, nothing.

I've found some solution that says the problem comes from the display, because RCP is single threaded. So I followed the instructions, and here's another version of the Game constructor :

public Game() {
    this.display = Display.getDefault();
    this.display.asyncExec(new Runnable() {

        @Override
        public void run() {
            shell = new Shell(display);
            setData();
            shell.setText("I work better but...");
            shell.setMinimumSize(800, 600);

            buildUI();

            shell.pack();
            shell.open();

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

And so here comes the new problem : I can't call an Image after this (hence the pic I showed on Window 2). Because Image (SWT) requires a display to be constructed, and because display doesn't work well without the Runnable instance, I can't use an image after this. And I need my Image here (and also somewhere else after this).

Edit : I have an error message in that case. It says :

org.eclipse.swt.SWTException : Failed to execute runnable (java.lang.IllegalArgumentException : Argument cannot be null)

Any solutions anyone please ?

Thanks in advance.

Kosnyru.

解决方案

If you add a Trimmed Window (or just a plain Window) to the 'Windows and Dialogs' section of the Application.e4xmi with 'To Be Rendered' turned off (leave Visible on) you can then show it using:

@Inject
EModelService modelService;
@Inject
MApplication app;


MUIElement window = modelService.find("window id", app);

window.setToBeRendered(true);

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