# TMX Editor - Table Layout & Integrated Edit Panel ✓

## Updates Complete

The TMX Editor now features:
1. **Table layout** - Source on left, target on right (conventional format)
2. **Integrated edit panel** - Edit directly above the grid (no popup windows)
3. **Word-level highlighting** - Precise yellow highlighting in table cells

## New Layout

### Before (Vertical Layout)
```
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
ID: 1
Source: The surface is smooth
Target: Het oppervlak is glad
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
ID: 2
Source: Another segment here
Target: Een ander segment hier
```

### After (Table Layout)
```
┌─────────────────────────────────────────────────────────────────────────────┐
│ ✏️ Edit Translation Unit - Editing TU #1                                     │
├────────────────────────────────┬────────────────────────────────────────────┤
│ Source: (en-US)                │ Target: (nl-NL)                            │
│ ┌────────────────────────────┐ │ ┌────────────────────────────────────────┐ │
│ │ The surface is smooth      │ │ │ Het oppervlak is glad                  │ │
│ │                            │ │ │                                        │ │
│ └────────────────────────────┘ │ └────────────────────────────────────────┘ │
│ [💾 Save Changes] [❌ Cancel]   │                                            │
└────────────────────────────────┴────────────────────────────────────────────┘

ID     | Source                    | Target
───────┼───────────────────────────┼────────────────────────────
1      | The surface is smooth     | Het oppervlak is glad
              ^^^^^^^                      ^^^^^^^^^
              (yellow)                     (yellow)
2      | Another segment here      | Een ander segment hier
```

## Features

### Integrated Edit Panel
Located **above the grid** for easy access:
- **Source text box** (left) - Edit source translation
- **Target text box** (right) - Edit target translation
- **Save Changes button** (green) - Saves and refreshes grid
- **Cancel button** (red) - Discards changes
- **Status label** - Shows which TU you're editing

### Table Display
Clean, conventional TMX editor format:
- **ID column** - Translation unit number
- **Source column** - Source language text (left)
- **Target column** - Target language text (right)
- **Fixed-width** - Columns aligned for easy scanning
- **Alternating rows** - Gray/white for readability

### Word-Level Highlighting
Precise highlighting in table cells:
- Only search terms highlighted (not entire rows/cells)
- Yellow background (`#ffff00`)
- Works in both source and target columns
- Case-insensitive matching

## Usage

### Editing a Translation Unit
1. **Double-click** any row in the table
2. The TU loads into the **edit panel above**
3. Edit source and/or target text
4. Click **💾 Save Changes** to save
5. Click **❌ Cancel** to discard

### No More Popup Windows!
- Everything happens in the main view
- No window juggling
- See your edits immediately in the grid below
- Professional, integrated workflow

## Technical Details

### Edit Panel Components
```python
# Integrated edit panel
self.edit_source_text = tk.Text(...)  # Source editor
self.edit_target_text = tk.Text(...)  # Target editor
self.save_edit_btn = tk.Button(...)   # Save button
self.cancel_edit_btn = tk.Button(...) # Cancel button
self.current_edit_tu = None           # Currently editing TU
```

### Table Format
```python
# Header
header_text = f"{'ID':<6} | {'Source':<50} | {'Target':<50}\n"

# Row
row = f"{tu.tu_id:<6} | {src_display:<50} | {tgt_display:<50}\n"
```

### Highlighting in Table
```python
# Highlight source
src_start = self.results_text.index("end-1c")
self.results_text.insert(tk.END, f"{src_display:<50} | ", row_tag)
src_end = self.results_text.index("end-1c")
if self.filter_source:
    self._highlight_text_in_range(self.results_text, src_start, src_end, self.filter_source)
```

## Benefits

### User Experience
1. **Faster editing** - No popup dialogs to manage
2. **Better context** - See grid while editing
3. **Conventional layout** - Familiar TMX editor format
4. **Visual clarity** - Table is easier to scan than vertical list

### Professional Features
1. **Side-by-side editing** - Source and target together
2. **Integrated workflow** - Everything in one view
3. **Precise highlighting** - Only search terms marked
4. **Clean interface** - No clutter, no popups

### Workflow Improvements
**Before:**
1. Double-click segment
2. Popup window opens
3. Edit in popup
4. Save and close popup
5. Return to main window
6. Find your place again

**After:**
1. Double-click segment
2. Edit panel fills (above grid)
3. Edit source/target
4. Click Save
5. Grid refreshes immediately
6. Continue working

## Color Scheme

- **Edit panel background**: `#e8f4f8` (light blue)
- **Row even**: `#f9f9f9` (light gray)
- **Row odd**: `#ffffff` (white)
- **Highlight**: `#ffff00` (yellow) background
- **Header**: `#e8e8e8` (gray)
- **ID column**: `#666666` (dark gray)
- **Save button**: `#4CAF50` (green)
- **Cancel button**: `#f44336` (red)

## Comparison with Other TMX Editors

### Traditional TMX Editors (Heartsome, OmegaT)
- Table format: ✅ Source left, target right
- Editing: ❌ Often requires popup/modal dialogs
- Highlighting: ❌ Usually row-level only

### Supervertaler TMX Editor
- Table format: ✅ Source left, target right
- Editing: ✅ Integrated panel (no popups!)
- Highlighting: ✅ Word-level precision

---

**Version**: 3.7.5  
**Date**: October 25, 2025  
**Module**: `modules/tmx_editor.py`  
**Features**: Table layout, integrated edit panel, word-level highlighting  
**Status**: ✓ Production Ready
