java - 如何在 GWT UiBinder 中引用 Widget？

Question

是否可以引用 UiBinder 创建的小部件并将其传递给 *.ui.xml 文件中其他小部件的 setter ？

我尝试按照以下代码创建一个标签 (CustomLabel)，该标签可以监听并跟踪表单小部件 (CustomWidget) 的状态。问题是 GWT 编译失败并显示:

[ERROR] Exception in thread "main" java.lang.StackOverflowError
[ERROR]     at sun.nio.cs.UTF_8$Encoder.encodeLoop(UTF_8.java:691)
[ERROR]     at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:579)
[ERROR]     at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:271)
[ERROR]     at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)
[ERROR]     at java.io.OutputStreamWriter.write(OutputStreamWriter.java:207)
[ERROR]     at java.io.BufferedWriter.flushBuffer(BufferedWriter.java:129)
[ERROR]     at java.io.BufferedWriter.flush(BufferedWriter.java:253)
[ERROR]     at java.io.PrintWriter.newLine(PrintWriter.java:482)
[ERROR]     at java.io.PrintWriter.println(PrintWriter.java:629)
[ERROR]     at java.io.PrintWriter.println(PrintWriter.java:740)
[ERROR]     at com.google.gwt.dev.util.log.PrintWriterTreeLogger.doLog(PrintWriterTreeLogger.java:79)
[ERROR]     at com.google.gwt.dev.util.log.PrintWriterTreeLogger.doCommitBranch(PrintWriterTreeLogger.java:65)
[ERROR]     at com.google.gwt.dev.util.log.AbstractTreeLogger.commitMyBranchEntryInMyParentLogger(AbstractTreeLogger.java:256)
[ERROR]     at com.google.gwt.dev.util.log.AbstractTreeLogger.branch(AbstractTreeLogger.java:167)
[ERROR]     at com.google.gwt.core.ext.TreeLogger.branch(TreeLogger.java:212)
[ERROR]     at com.google.gwt.editor.rebind.model.EditorModel.createEditorData(EditorModel.java:381)
[ERROR]     at com.google.gwt.editor.rebind.model.EditorModel.createEditorData(EditorModel.java:390)
[ERROR]     at com.google.gwt.editor.rebind.model.EditorModel.createEditorData(EditorModel.java:390)

View.ui.xml:

<g:HTMLPanel>
    <x:CustomLabel forTarget={widget} />
    <x:CustomWidget ui:field="widget" />
</g:HTMLPanel>

View.java:

@UiField
CustomWidget widget;

CustomLabel.java:

public void setForTarged(CustomWidget forTarget) {
    this.forTarget = forTarget
}

Answer 1

原则上这应该可行。我在代码中使用类似的引用。

在您的 View.java 中:

@UiField
CustomWidget customWidget; 

应该是

@UiField
CustomWidget widget;