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Posted to notifications@netbeans.apache.org by "mc5-dev (via GitHub)" <gi...@apache.org> on 2025/09/02 09:44:13 UTC
[I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
mc5-dev opened a new issue, #8780:
URL: https://github.com/apache/netbeans/issues/8780
### Apache NetBeans version
Apache NetBeans 27
### What happened
Editing an existing Swing screen in the GUI editor caused all JButton mnemonics to disappear. Netbeans stopped generating the code to set them. The mnemonic values can be still seen in the properties editor, but attempting to change results in a popup saying "Invalid value: s" ('s' is mnemonic trying to set in this eg). The value then gets blanked out. Strangely, if you enter 'ss' as value (without the quotes) it accepts it.
Note that you only see this error if you attempt to edit the mnemonic field, but any other edits in GUI editor still cause all the mnemonics to disappear, without any error displayed.
### Language / Project Type / NetBeans Component
Java Maven, Swing
### How to reproduce
Create a brand new Java Maven project.
Add a new JPanel Form
In GUI editor, from the Pallet->Swing Controls, click on "Button" and place anywhere on panel.
In the Properties panel, enter a single letter Eg s, and tab out of field
Popup error is displayed.
### Did this work correctly in an earlier version?
Apache NetBeans 24 or earlier
### Operating System
Windows 11
### JDK
JDK 21
### Apache NetBeans packaging
Apache NetBeans binary zip
### Anything else
_No response_
### Are you willing to submit a pull request?
No
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "mbien (via GitHub)" <gi...@apache.org>.
mbien closed issue #8780: Swing GUI Editor cannot set mnemonic/mnemonics disappearing
URL: https://github.com/apache/netbeans/issues/8780
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "mbien (via GitHub)" <gi...@apache.org>.
mbien commented on issue #8780:
URL: https://github.com/apache/netbeans/issues/8780#issuecomment-3251314176
here a dev-build zip: https://github.com/apache/netbeans/actions/runs/17450148807/artifacts/3922512507
would be great if someone could verify that this is working as expected again
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "mbien (via GitHub)" <gi...@apache.org>.
mbien commented on issue #8780:
URL: https://github.com/apache/netbeans/issues/8780#issuecomment-3257062612
@pedro-w Thanks for verifying!
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "pedro-w (via GitHub)" <gi...@apache.org>.
pedro-w commented on issue #8780:
URL: https://github.com/apache/netbeans/issues/8780#issuecomment-3249141936
I found this, which I don't think makes sense.
https://github.com/apache/netbeans/blob/304cbece6f1bab9445184087a42e4cc2f0f9b71d/java/form/src/org/netbeans/modules/form/editors/MnemonicEditor.java#L127-L147
`newValue` is a Character here (this function is called by `setAsText` in the same file) and although the new value is set, control then passes through to line 146 which throws an exception.
That exception ultimately causes the "Invalid value:" via this helper function
https://github.com/apache/netbeans/blob/304cbece6f1bab9445184087a42e4cc2f0f9b71d/platform/openide.explorer/src/org/openide/explorer/propertysheet/PropUtils.java#L560-L589
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "pedro-w (via GitHub)" <gi...@apache.org>.
pedro-w commented on issue #8780:
URL: https://github.com/apache/netbeans/issues/8780#issuecomment-3249181162
I believe some 'return's were accidentally omitted in a recent edit (April 2025)
https://github.com/apache/netbeans/blob/3ebd6cb396842f212bd09011d689941884dd649d/java/form/src/org/netbeans/modules/form/editors/MnemonicEditor.java#L134-L152
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "pedro-w (via GitHub)" <gi...@apache.org>.
pedro-w commented on issue #8780:
URL: https://github.com/apache/netbeans/issues/8780#issuecomment-3253884336
I tried it and AFAICs it worked as expected.
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "pedro-w (via GitHub)" <gi...@apache.org>.
pedro-w commented on issue #8780:
URL: https://github.com/apache/netbeans/issues/8780#issuecomment-3249020522
I can confirm this. Seems like you can set the mnemonic to any (within reason!) string of length > 1 in the properties pane and the mnemonic will be set to its first character. e.g. `soup` -> `s`
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "neilcsmith-net (via GitHub)" <gi...@apache.org>.
neilcsmith-net commented on issue #8780:
URL: https://github.com/apache/netbeans/issues/8780#issuecomment-3249270842
Good call. Looks like this broke in #8385 - @mbien ?
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Re: [I] Swing GUI Editor cannot set mnemonic/mnemonics disappearing [netbeans]
Posted by "mbien (via GitHub)" <gi...@apache.org>.
mbien commented on issue #8780:
URL: https://github.com/apache/netbeans/issues/8780#issuecomment-3250482301
my mistake, sorry. Will open a PR later.
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