IME reconversion (再変換) is not supported in AvaloniaEdit TextBox (Japanese IME) #449

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opened 2026-04-22 16:32:50 -05:00 by hisui3393 · 0 comments

hisui3393 commented

2026-04-22 16:32:50 -05:00

(Migrated from github.com)

It seems my previous explanation was unclear, so I would like to clarify the issue more precisely.

Environment:

OS: Windows 11
Framework: Avalonia (used in Subtitle Edit 5 beta 17)
Control: AvaloniaEdit TextBox
IME: Microsoft IME, Google Japanese Input

Issue:
IME reconversion (再変換) does not work in AvaloniaEdit TextBox.

Steps to reproduce:

Type Japanese text in the TextBox
Confirm the text (確定)
Press reconversion key:
- Henkan key (変換キー), or
- Ctrl + Backspace (depending on IME settings)

Expected behavior:

The confirmed text should re-enter conversion mode (reconversion)

Actual behavior:

Nothing happens
Sometimes focus is lost or moved

Comparison:

Works correctly in native Windows applications (e.g., Notepad)
Worked correctly in Subtitle Edit 4 (WinForms)
Reproducible with both Microsoft IME and Google Japanese Input

Important note:
This is not about basic IME input (which works), but specifically about reconversion (再変換).

Impact:
Reconversion is a standard and frequently used feature in Japanese text editing.
Lack of this functionality significantly reduces usability for Japanese users.

If reconversion is currently not supported, is there any plan to support it?

It seems my previous explanation was unclear, so I would like to clarify the issue more precisely. **Environment:** * OS: Windows 11 * Framework: Avalonia (used in Subtitle Edit 5 beta 17) * Control: AvaloniaEdit TextBox * IME: Microsoft IME, Google Japanese Input **Issue:** IME reconversion (再変換) does not work in AvaloniaEdit TextBox. **Steps to reproduce:** 1. Type Japanese text in the TextBox 2. Confirm the text (確定) 3. Press reconversion key: * Henkan key (変換キー), or * Ctrl + Backspace (depending on IME settings) **Expected behavior:** * The confirmed text should re-enter conversion mode (reconversion) **Actual behavior:** * Nothing happens * Sometimes focus is lost or moved **Comparison:** * Works correctly in native Windows applications (e.g., Notepad) * Worked correctly in Subtitle Edit 4 (WinForms) * Reproducible with both Microsoft IME and Google Japanese Input **Important note:** This is not about basic IME input (which works), but specifically about **reconversion (再変換)**. **Impact:** Reconversion is a standard and frequently used feature in Japanese text editing. Lack of this functionality significantly reduces usability for Japanese users. --- If reconversion is currently not supported, is there any plan to support it?

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gh-icsharpcode/AvalonEdit#449

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