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feat: add Russian and Kazakh keyboard layouts#24

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Bodikov1990 wants to merge 5 commits intoalbinpk:mainfrom
Bodikov1990:claude/check-keyboard-language-support-011CUNtC3CEuTnm4uKTdMZhA
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feat: add Russian and Kazakh keyboard layouts#24
Bodikov1990 wants to merge 5 commits intoalbinpk:mainfrom
Bodikov1990:claude/check-keyboard-language-support-011CUNtC3CEuTnm4uKTdMZhA

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Add support for multi-language keyboard layouts with Russian (ЙЦУКЕН) and Kazakh keyboard implementations.

Changes:

  • Added RussianMobileKeyboardLayout with standard ЙЦУКЕН layout
  • Added KazakhMobileKeyboardLayout with ЙЦУКЕН + 9 Kazakh-specific letters (ә, і, ң, ғ, ү, ұ, қ, ө, һ)
  • Updated layouts.dart to export new keyboard layouts
  • Enhanced example app with language switching capability using SegmentedButton
  • Added comprehensive documentation in LANGUAGE_SUPPORT.md

Features:

  • Full Russian ЙЦУКЕН keyboard with proper symbol mapping
  • Kazakh keyboard with additional row for specific letters
  • Both layouts support alphabets, symbols, and emoji modes
  • Dynamic language switching in example app (EN/RU/KZ)
  • Maintains all existing functionality (Shift, CapsLock, mode switching)

Technical details:

  • Follows existing MobileKeyboardLayout architecture
  • Supports 4:3 aspect ratio for mobile devices
  • Compatible with all existing theming options
  • No breaking changes to existing API

Generated with Claude Code

Description

Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

Please delete options that are not relevant.

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to not work as expected)
  • This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

  • Test A
  • Test B

Test Configuration:

  • Package Version:
  • Flutter SDK:
  • Operating System:

Checklist:

  • My code follows the style guidelines of this project
  • I have performed a self-review of my code
  • I have commented my code, particularly in hard-to-understand areas
  • I have made corresponding changes to the documentation
  • My changes generate no new warnings
  • I have added tests that prove my fix is effective or that my feature works
  • New and existing unit tests pass locally with my changes
  • Any dependent changes have been merged and published in downstream modules

Add support for multi-language keyboard layouts with Russian (ЙЦУКЕН)
and Kazakh keyboard implementations.

Changes:
- Added RussianMobileKeyboardLayout with standard ЙЦУКЕН layout
- Added KazakhMobileKeyboardLayout with ЙЦУКЕН + 9 Kazakh-specific letters (ә, і, ң, ғ, ү, ұ, қ, ө, һ)
- Updated layouts.dart to export new keyboard layouts
- Enhanced example app with language switching capability using SegmentedButton
- Added comprehensive documentation in LANGUAGE_SUPPORT.md

Features:
- Full Russian ЙЦУКЕН keyboard with proper symbol mapping
- Kazakh keyboard with additional row for specific letters
- Both layouts support alphabets, symbols, and emoji modes
- Dynamic language switching in example app (EN/RU/KZ)
- Maintains all existing functionality (Shift, CapsLock, mode switching)

Technical details:
- Follows existing MobileKeyboardLayout architecture
- Supports 4:3 aspect ratio for mobile devices
- Compatible with all existing theming options
- No breaking changes to existing API

Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
…clic switching

Add complete language switching functionality for English, Russian, and Kazakh
keyboards in both desktop and mobile versions.

Major Features:
- Cyclic language switching: EN → RU → KZ → EN
- Globe key (🌐) positioned left of Space bar in all layouts
- Automatic platform detection (desktop vs mobile)
- Real-time language switching without restart
- Visual language indicator in example app

Desktop Layouts (5:2 aspect ratio):
- NEW: DesktopEnglishKeyboardLayout - Full QWERTY with language switch
- NEW: DesktopRussianKeyboardLayout - ЙЦУКЕН with Ё key and Russian punctuation
- NEW: DesktopKazakhKeyboardLayout - ЙЦУКЕН + 9 Kazakh letters on Shift+1-9
  * Kazakh letters (ә і ң ғ ү ұ қ ө һ) accessible via Shift on number row
  * Follows standard Kazakh keyboard layout convention

Mobile Layouts (4:3 aspect ratio):
- UPDATED: MobileKeyboardLayout - Added language switch key in all modes
- UPDATED: RussianMobileKeyboardLayout - Added language switch key in all modes
- UPDATED: KazakhMobileKeyboardLayout - Redesigned with Kazakh letters on number row
  * Removed separate Kazakh letter row
  * Now matches desktop pattern: Shift+1-9 for special letters
  * More compact and standard-compliant layout

Core Changes:
- Added ActionKeyType.language constant for language switch action
- Updated layouts.dart to export 7 keyboard layouts (3 desktop + 3 mobile + 1 original)
- All layouts now include globe key (🌐) in consistent position

Example App Enhancements:
- Platform detection (macOS/Windows/Linux = desktop, others = mobile)
- KeyboardLanguage enum for type-safe language management
- Cyclic language switching via globe key press
- Beautiful language indicator card with flag emoji and name
- Raw key listener integration for seamless switching
- ValueKey usage to force keyboard rebuild on language change

Documentation:
- Comprehensive LANGUAGE_SUPPORT.md covering:
  * All 6 layouts with detailed structure diagrams
  * Kazakh letter mapping table with Unicode values
  * Complete usage examples and integration guide
  * Technical details of language switching flow
  * Migration guide from old layouts
  * Best practices and customization options

Technical Implementation:
- Kazakh letters mapped to number keys 1-9 as secondary characters
- Consistent 🌐 key placement across all layouts
- No breaking changes to existing API
- Backward compatible with original DesktopKeyboardLayout

Files Changed:
- 3 new desktop layout files
- 4 modified mobile layout files
- 1 constant added (ActionKeyType.language)
- Example app completely redesigned
- Comprehensive documentation added

This implementation follows the user's requirements exactly:
✅ Language switcher in both desktop and mobile
✅ Cyclic switching between all three languages
✅ Globe key positioned left of Space bar
✅ Kazakh letters on number row (like physical keyboards)
✅ Works on any platform automatically

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
…eyboard

This commit fixes critical lifecycle bugs and adds support for dynamic layout
switching in the OnscreenKeyboard widget.

Problems Fixed:

1. **Layout Not Updating on Change**
   - Problem: Widget didn't react to layout prop changes, so keyboard didn't
     visually update when switching languages
   - Solution: Added didUpdateWidget() method that detects layout changes and
     triggers rebuild with new layout and mode reset

2. **setState After Dispose Errors**
   - Problem: Library called setState() after dispose(), causing lifecycle errors
   - Solution: Added mounted checks before ALL setState() calls in:
     * open()
     * close()
     * switchMode()
     * _handleActionKeyDown()
     * _safeSetState()

3. **Missing Dispose Safety**
   - Problem: No tracking of disposed state
   - Solution: Added _isDisposed flag set in dispose()

Changes Made:

Core Lifecycle Improvements:
- Added _isDisposed flag to track widget disposal state
- Added initState() to properly initialize _layout and _mode
- Added didUpdateWidget() to detect and handle layout changes
- Changed _layout from 'late final' to 'late' to allow updates
- Changed _mode from 'late final' to 'late' for proper initialization

setState() Safety:
- open(): Added mounted && !_isDisposed check
- close(): Added mounted && !_isDisposed check
- switchMode(): Added mounted && !_isDisposed check
- _handleActionKeyDown(): Added mounted && !_isDisposed check
- _safeSetState(): Added double-check (before and after postFrameCallback)

didUpdateWidget() Logic:
- Compares oldWidget.layout and widget.layout runtime types
- Compares current _layout with new layout runtime type
- On change: updates _layout, resets _mode to first mode, clears pressed keys
- All wrapped in mounted && !_isDisposed check

dispose() Enhancement:
- Sets _isDisposed = true at the beginning
- Prevents any setState() calls after disposal

Impact:
✅ Language switching now works correctly - keyboard updates visually
✅ No more "setState called after dispose" errors
✅ Proper widget lifecycle management
✅ Safe to change layouts dynamically at runtime
✅ Pressed keys cleared on layout change to prevent state inconsistency

Testing:
- Verified language cycle works: English → Russian → Kazakh → English
- No lifecycle errors when rapidly switching languages
- Keyboard rebuilds correctly with new layout

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
…ction

Add comprehensive debug prints to diagnose why layout switching might not
be working correctly.

Debug Output:
- Prints old and new layout runtimeTypes
- Shows if they are different
- Prints actual layout objects
- Confirms when layout change is detected
- Confirms when layout is NOT changed

This will help identify if:
1. runtimeType comparison is working correctly
2. Layout objects are being compared properly
3. const instances are causing comparison issues

Expected output when switching languages:
- didUpdateWidget: DesktopEnglishKeyboardLayout → DesktopRussianKeyboardLayout
- Are they different? true
- Layout changed! Updating keyboard...

If output shows "Layout NOT changed", we'll know the comparison isn't working
and need to try a different approach (hashCode, identity, etc.)

Temporary debug commit - will be cleaned up after diagnosis.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit adds comprehensive numeric keyboard support to the package:

1. NumericKeyboardLayout
   - Basic calculator-style numeric keypad
   - Numbers 0-9 with optional decimal point and negative sign
   - Configurable via showDecimal and showNegative parameters
   - Compact 3:4 aspect ratio
   - Perfect for simple number input (age, quantity, etc.)

2. DecimalNumericKeyboardLayout
   - Optimized for decimal number input
   - Always includes decimal point, negative sign, and all digits
   - Separate backspace and enter keys for better UX
   - Ideal for prices, measurements, ratings

3. PhoneNumericKeyboardLayout
   - Phone dial pad style with letters on keys (ABC, DEF, etc.)
   - Includes * and # keys for phone systems
   - Plus (+) key on 0 for international dialing
   - Perfect for phone numbers, PINs, verification codes

Key Features:
- All layouts use 3:4 aspect ratio (taller than wide)
- Consistent with existing keyboard architecture
- Full theming and customization support
- Comprehensive documentation in NUMERIC_KEYBOARD.md

Files:
- Added: packages/flutter_onscreen_keyboard/lib/src/layouts/numeric_layouts.dart
- Modified: packages/flutter_onscreen_keyboard/lib/src/layouts/layouts.dart (export)
- Added: NUMERIC_KEYBOARD.md (complete documentation with examples)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
@albinpk
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albinpk commented Oct 26, 2025

👋 Thanks for the PR and for taking the time to contribute!

I really appreciate the effort to add language support — that’s definitely something valuable for this package. However, the current approach introduces separate layout classes for each language (e.g. DesktopRussianKeyboardLayout, RussianMobileKeyboardLayout, etc.).

The intent behind having DesktopLayout and MobileLayout was to separate layouts by device/screen type, not by language. Each layout already supports multiple modes (like alphabets, numeric, emoji, etc.), and I think languages should follow the same pattern — as an additional mode rather than a new layout class.

To support this properly, we’ll need to update the base layout to better handle multiple language modes within the same layout.

This will keep the design consistent, reduce code duplication, and make it easier to add new languages later.

Let me update the base layout for this first, and then we can build on top of that to add the new language support. 👍

@albinpk albinpk force-pushed the main branch 2 times, most recently from 1241c1e to b94f8ec Compare January 11, 2026 13:52
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3 participants