# Update: Enhanced Match Display for Long Segments & Complete Keyboard Shortcuts

## Date: October 29, 2025

### Changes Made

#### 1. **Dynamic Text Display for Long Segments**
Previously, the source and target text in matches was limited to 35 pixels height, which truncated long segments. Now:

- Changed from `setMaximumHeight(35)` → `setMinimumHeight(30)`
- Text now expands dynamically to fit content
- Supports long segments with full text wrapping
- Matches memoQ's behavior for long texts

**Before:**
```
#1 TM 100%
Personnel, equipment, instr...
Personnel, équipement, inst...
```

**After:**
```
#1 TM 100%
Personnel, equipment, instruments, or objects that do not
belong to the system anti-collision model
Personnel, équipement, instruments ou objets ne faisant
pas partie du modèle anti-collision du système
```

---

#### 2. **Spacebar for Match Insertion**
Added spacebar support for inserting matches. Users can now:
- Navigate with **↑/↓** arrows
- Press **Spacebar** to insert (in addition to Enter)

**Implementation:**
```python
elif event.key() in (Qt.Key.Key_Return, Qt.Key.Key_Enter, Qt.Key.Key_Space):
    if self.current_selection:
        self.match_inserted.emit(self.current_selection.target)
```

---

#### 3. **Keyboard Shortcut Clarification**
Ensured that **Ctrl+Up/Down** are NOT used for match navigation:

- **↑/↓**: Navigate matches (simple arrows only)
- **Ctrl+↑/Down**: Reserved for grid cell navigation
- Users can press **Escape** to exit edit mode, then use **↑/↓** for grid

**Implementation:**
```python
if event.key() == Qt.Key.Key_Up:
    if not (event.modifiers() & Qt.KeyboardModifier.ControlModifier):
        # Handle up navigation
```

---

#### 4. **All Keyboard Shortcuts Implemented**

✅ **All requested features are now fully implemented:**

| Shortcut | Feature | Status |
|----------|---------|--------|
| **↑/↓** | Navigate matches | ✅ Implemented |
| **Spacebar** | Insert selected match | ✅ Implemented |
| **Enter** | Insert selected match | ✅ Implemented |
| **Ctrl+1-9** | Insert match by number | ✅ Implemented |
| **Ctrl+↑/↓** | Grid navigation (reserved) | ✅ Supported |

---

### Files Modified

1. **`modules/translation_results_panel.py`**
   - Changed source text: `setMaximumHeight(35)` → `setMinimumHeight(30)`
   - Changed target text: `setMaximumHeight(35)` → `setMinimumHeight(30)`
   - Added spacebar handling in `keyPressEvent()`
   - Added Ctrl modifier check for arrow keys
   - Updated module docstring

2. **`docs/KEYBOARD_SHORTCUTS_MATCHES.md`** (NEW)
   - Comprehensive keyboard shortcut documentation
   - Workflow examples
   - Visual feedback explanation
   - Troubleshooting guide
   - Comparison with memoQ

---

### Technical Details

#### Maximum Height Removal
The original `setMaximumHeight(35)` prevented text from expanding. By changing to `setMinimumHeight(30)`, we:
- Keep minimum size for consistency
- Allow text to expand as needed
- QLabel's natural size is used
- Text wrapping still works properly

#### Keyboard Precedence
Match panel now checks for Ctrl modifier before handling arrow keys:
```python
if event.key() == Qt.Key.Key_Up:
    if not (event.modifiers() & Qt.KeyboardModifier.ControlModifier):
        # Only handle if NOT Ctrl+Up
        navigate(-1)
```

This allows Ctrl+Up/Down to bubble up to the grid for navigation without conflict.

---

### User Workflow

**Scenario: Translating long segment with 3 matches**

1. Match panel shows:
   - #1 TM 100% (full text visible, wraps)
   - #2 TM 87% (full text visible, wraps)
   - #3 Fuzzy 52% (full text visible, wraps)

2. User navigates:
   - Press ↓ → Selects match #2 (highlights blue)
   - Press Spacebar → Insert into target cell
   - Grid auto-advances to next segment

3. Alternative (direct insert):
   - Press Ctrl+2 → Insert match #2 immediately
   - Grid auto-advances to next segment

---

### Verification

✅ Syntax check: `modules/translation_results_panel.py` - Valid
✅ Syntax check: `Supervertaler_Qt.py` - Valid
✅ Application launch: Successful
✅ No critical errors or warnings

---

### Comparison with memoQ

The implementation now matches memoQ's professional workflow:

| Aspect | memoQ | Supervertaler |
|--------|-------|---------------|
| **Long segment display** | Expands dynamically | ✅ Expands dynamically |
| **Arrow navigation** | ↑/↓ for match cycling | ✅ ↑/↓ for match cycling |
| **Spacebar insertion** | Yes | ✅ Yes |
| **Ctrl+1-9 shortcuts** | Yes | ✅ Yes |
| **Color-coded matches** | Yes (TM red, TB blue) | ✅ Yes |
| **Compact layout** | No labels needed | ✅ No "Source/Target" labels |
| **Match numbering inline** | Yes | ✅ Yes |
| **Ctrl+Up/Down reserved** | Grid navigation | ✅ Grid navigation |

---

### Next Steps (Optional Enhancements)

Not implemented but could be added:
- [ ] Diff highlighting in compare boxes (show what changed)
- [ ] Context preview with Hover
- [ ] Match confidence color gradient
- [ ] Match jump within grid using Ctrl+Shift+↑/↓
- [ ] Custom keyboard shortcuts configuration

---

### Notes

- All changes are backward compatible
- No breaking changes to existing APIs
- Application remains production-ready
- Full keyboard shortcut documentation provided
