it prints

py_app/PRINT_PROGRESS_FEATURE.md

@@ -0,0 +1,125 @@
+# Print Progress Modal Feature
+
+## Overview
+Added a visual progress modal that displays during label printing operations via QZ Tray. The modal shows real-time progress, updates the database upon completion, and refreshes the table view automatically.
+
+## Features Implemented
+
+### 1. Progress Modal UI
+- **Modal Overlay**: Full-screen semi-transparent overlay to focus user attention
+- **Progress Bar**: Animated progress bar showing percentage completion
+- **Status Messages**: Real-time status updates during printing
+- **Label Counter**: Shows "X / Y" format for current progress (e.g., "5 / 10")
+
+### 2. Print Flow Improvements
+The printing process now follows these steps:
+
+1. **Validation**: Check QZ Tray connection and printer selection
+2. **Modal Display**: Show progress modal immediately
+3. **Sequential Printing**: Print each label one by one with progress updates
+   - Update progress bar after each successful print
+   - Show current label number being printed
+   - 500ms delay between labels for printer processing
+4. **Database Update**: Call `/update_printed_status/<order_id>` endpoint
+   - Marks the order as printed in the database
+   - Handles errors gracefully (prints still succeed even if DB update fails)
+5. **Table Refresh**: Automatically click "Load Orders" button to refresh the view
+6. **Modal Close**: Hide modal after completion
+7. **Notification**: Show success notification to user
+
+### 3. Progress Updates
+The modal displays different status messages:
+- "Preparing to print..." (initial)
+- "Printing label X of Y..." (during printing)
+- "✅ All labels printed! Updating database..." (after prints complete)
+- "✅ Complete! Refreshing table..." (after DB update)
+- "⚠️ Labels printed but database update failed" (on DB error)
+
+### 4. Error Handling
+- Modal automatically closes on any error
+- Error notifications shown to user
+- Database update failures don't prevent successful printing
+- Graceful degradation if DB update fails
+
+## Technical Details
+
+### CSS Styling
+- **Modal**: Fixed position, z-index 9999, centered layout
+- **Content Card**: White background, rounded corners, shadow
+- **Progress Bar**: Linear gradient blue, smooth transitions
+- **Responsive**: Min-width 400px, max-width 500px
+
+### JavaScript Functions Modified
+
+#### `handleQZTrayPrint(selectedRow)`
+**Changes:**
+- Added modal element references
+- Show modal before printing starts
+- Update progress bar and counter in loop
+- Call database update endpoint after printing
+- Handle database update errors
+- Refresh table automatically
+- Close modal on completion or error
+
+### Backend Integration
+
+#### Endpoint Used: `/update_printed_status/<int:order_id>`
+- **Method**: POST
+- **Purpose**: Mark order as printed in database
+- **Authentication**: Requires superadmin, warehouse_manager, or etichete role
+- **Response**: JSON with success/error message
+
+## User Experience Flow
+
+1. User selects an order row in the table
+2. User clicks "Print Label (QZ Tray)" button
+3. Modal appears showing "Preparing to print..."
+4. Progress bar fills as each label prints
+5. Counter shows current progress (e.g., "7 / 10")
+6. After all labels print: "✅ All labels printed! Updating database..."
+7. Database updates with printed status
+8. Modal shows "✅ Complete! Refreshing table..."
+9. Modal closes automatically
+10. Success notification appears
+11. Table refreshes showing updated order status
+
+## Benefits
+
+✅ **Visual Feedback**: Users see real-time progress instead of a frozen UI
+✅ **Status Clarity**: Clear messages about what's happening
+✅ **Automatic Updates**: Database and UI update without manual intervention
+✅ **Error Recovery**: Graceful handling of database update failures
+✅ **Professional UX**: Modern, polished user interface
+✅ **Non-Blocking**: Progress modal doesn't interfere with printing operation
+
+## Files Modified
+
+1. **print_module.html**
+   - Added modal HTML structure
+   - Added modal CSS styles
+   - Updated `handleQZTrayPrint()` function
+   - Added database update API call
+   - Added automatic table refresh
+
+## Testing Checklist
+
+- [ ] Modal appears when printing starts
+- [ ] Progress bar animates smoothly
+- [ ] Counter updates correctly (1/10, 2/10, etc.)
+- [ ] All labels print successfully
+- [ ] Database updates after printing
+- [ ] Table refreshes automatically
+- [ ] Modal closes after completion
+- [ ] Success notification appears
+- [ ] Error handling works (if DB update fails)
+- [ ] Modal closes on printing errors
+
+## Future Enhancements
+
+Potential improvements:
+- Add "Cancel" button to stop printing mid-process
+- Show estimated time remaining
+- Add sound notification on completion
+- Log printing history with timestamps
+- Add printer status monitoring
+- Show print queue if multiple orders selected