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Added a sample as this was pretty error prone

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Also added some clarifying notes all based on this discussion: https://stackoverflow.com/questions/59443789/text-field-with-standard-psielement-auto-completion-in-intellij-plugin
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Codename One 2019-12-25 21:14:57 +02:00 committed by GitHub
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user_interface_components/editor_components.md
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@ -39,3 +39,22 @@ This can be accomplished with the following steps:
[`EditorTextField`](upsource:///platform/platform-impl/src/com/intellij/ui/EditorTextField.java)
constructor or its `setDocument()` method.
E.g.:
```java
PsiFile psiFile = PsiDocumentManager.getInstance(editor.getProject()).getPsiFile(editor.getDocument());
PsiElement element = psiFile.findElementAt(editor.getCaretModel().getOffset());
PsiExpressionCodeFragment code = JavaCodeFragmentFactory.getInstance(editor.getProject()).createExpressionCodeFragment("", element, null, true);
Document document = PsiDocumentManager.getInstance(editor.getProject()).getDocument(code);
EditorTextField myInput = new EditorTextField(document, editor.getProject(), JavaFileType.INSTANCE);
```
**TIPS**:
* When creating more than one field you need two separate documents. This is accomplished by using separate instances of the `PsiExpressionCodeFragment`
* `setText` no longer works for the input field. However, the `createExpressionCodeFragment` accepts the text fore the field as an argument. As such you can replace the empty string and create a new document in leau of `setText()`
* You can replace instances of `JTextField` in the GUI builder with custom replace using the right click in your IDE. Make sure to use "Custom Create" so you can set the initialization code properly