使用WindowsBuilder进行可视化设计时不能预览界面

AlstonWilliams

于 2015-08-01 15:56:37 发布

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分类专栏： java错误及其处理文章标签：可视化

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在使用WindowBuilder进行Java界面设计时遇到错误：'WindowBuilder was not able to show the GUI'。该问题可能由自定义布局管理器引起。通过创建一个简单的项目并复制FillLayout的代码，发现即使模仿了WB源码中的FillLayoutInfo，仍然无法按预期工作。附带的Eclipse项目展示了此问题，当尝试预览MainWindow.java的Design视图时，会收到错误提示。问题关键在于shell.setLayout(new SomeLayout(SWT.HORIZONTAL))这行代码。

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今天用windowsBuilder设计界面，本来想自己写代码，然后再在可视化窗口中预览，看看效果，可是提示" WindowBuilder was not able to show the GUI”的错误。google了一下，发现原来是布局不对造成的：
I tried creating a very simple project in which I created a layout manager named SomeLayout. I copied into it the exact code from FillLayout, and I also created a SomeLayoutInfo class with helper classes, which I modeled exactly after the FillLayoutInfo and associated from the WB source tree. It doesn't seem to be working the way I expected. I have attached a very simple sample Eclipse project that highlights the problem that I am seeing (note that the classpath will need to be massaged a bit to point to your local SWT version and WB installation directory).

In the sample project I have psoted, when I click on the Design tab for MainWindow.java, I get a "WindowBuilder was not able to show the GUI" message. If I comment out line 47:

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// shell.setLayout(new SomeLayout(SWT.HORIZONTAL));