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# ImagePreview Component - Implementation Summary
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## Overview
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Full-screen image preview component with comprehensive navigation support for viewing transaction images. Implements Requirements 4.6 and 4.14 from the accounting-feature-upgrade specification.
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## Requirements Fulfilled
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### Requirement 4.6: Full-Screen Image Preview
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✅ **WHEN** user clicks on uploaded image **THEN** Image_Attachment_System **SHALL** display full-screen image preview
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**Implementation:**
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- Full-screen modal overlay with dark background (95% opacity)
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- Image displayed at maximum size while maintaining aspect ratio
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- Smooth zoom-in animation on open
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- Click-outside-to-close functionality
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- Close button in top-right corner
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- Body scroll lock when preview is active
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### Requirement 4.14: Left/Right Swipe Navigation
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✅ **WHEN** image preview is active **THEN** Image_Attachment_System **SHALL** support left/right sliding to switch images
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**Implementation:**
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- Touch swipe navigation for mobile devices
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- Mouse drag navigation for desktop
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- Previous/Next navigation buttons
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- Keyboard arrow key navigation
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- Circular navigation (wraps around at edges)
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- Minimum swipe distance threshold (50px) to prevent accidental navigation
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## Component Structure
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### Files Created
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1. **ImagePreview.tsx** - Main component implementation
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2. **ImagePreview.css** - Styling and animations
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3. **ImagePreview.test.tsx** - Comprehensive unit tests
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4. **README.md** - Component documentation
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5. **ImagePreview.example.tsx** - Usage examples
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6. **IMPLEMENTATION_SUMMARY.md** - This file
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### Component Props
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```typescript
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interface ImagePreviewProps {
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images: TransactionImage[]; // Array of images to preview
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initialIndex: number; // Starting image index (0-based)
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open: boolean; // Modal open state
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onClose: () => void; // Close callback
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}
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```
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## Key Features
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### 1. Navigation Methods
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- **Keyboard**: Arrow Left/Right for navigation, Escape to close
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- **Mouse**: Click buttons, drag left/right to navigate
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- **Touch**: Swipe left/right to navigate
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- **Circular**: Wraps from last to first and vice versa
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### 2. UI Elements
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- Image counter (e.g., "2 / 5")
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- Previous/Next navigation buttons (hidden for single image)
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- Close button with hover effects
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- Image information (filename, file size)
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- Smooth animations and transitions
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### 3. User Experience
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- Body scroll lock when modal is open
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- Click overlay to close
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- Click image container does NOT close (prevents accidental closes)
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- Smooth fade-in and zoom-in animations
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- Responsive design for all screen sizes
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- Backdrop blur effect on controls
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### 4. Accessibility
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- Proper ARIA roles and labels
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- Keyboard navigation support
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- Screen reader friendly
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- Reduced motion support for accessibility preferences
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- Non-draggable images to prevent browser drag behavior
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## Technical Implementation
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### State Management
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```typescript
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const [currentIndex, setCurrentIndex] = useState(initialIndex);
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const [touchStart, setTouchStart] = useState<number | null>(null);
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const [touchEnd, setTouchEnd] = useState<number | null>(null);
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const [isDragging, setIsDragging] = useState(false);
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const [dragStart, setDragStart] = useState<number | null>(null);
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const [dragEnd, setDragEnd] = useState<number | null>(null);
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```
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### Navigation Logic
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- **handlePrevious()**: Decrements index or wraps to last image
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- **handleNext()**: Increments index or wraps to first image
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- **onTouchStart/Move/End**: Handles touch swipe gestures
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- **onMouseDown/Move/Up**: Handles mouse drag gestures
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- Minimum swipe distance: 50px to prevent accidental navigation
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### Effects
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1. **Index Reset**: Resets to initialIndex when prop changes
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2. **Body Scroll Lock**: Locks/unlocks body scroll based on open state
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3. **Keyboard Listeners**: Adds/removes keyboard event listeners
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### Image URL Construction
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```typescript
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const imageUrl = `${import.meta.env.VITE_API_BASE_URL || 'http://localhost:8080/api/v1'}/images/${currentImage.id}`;
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```
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## Styling Highlights
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### Layout
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- Fixed positioning covering entire viewport
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- Flexbox centering for image
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- Z-index: 2000 (above other modals)
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- Max image size: 90vw × 80vh
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### Visual Design
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- Dark overlay: `rgba(0, 0, 0, 0.95)`
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- Frosted glass effect on controls: `backdrop-filter: blur(10px)`
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- Button backgrounds: `rgba(255, 255, 255, 0.1)`
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- Smooth transitions: 200ms for buttons, 300ms for image
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### Responsive Breakpoints
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- **Desktop**: Full-size controls (56px buttons)
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- **Tablet (≤768px)**: Medium controls (48px buttons)
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- **Mobile (≤480px)**: Compact controls (44px buttons)
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### Animations
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```css
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@keyframes fadeIn {
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from { opacity: 0; }
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to { opacity: 1; }
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}
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@keyframes zoomIn {
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from { opacity: 0; transform: scale(0.9); }
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to { opacity: 1; transform: scale(1); }
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}
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```
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## Testing Coverage
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### Unit Tests (ImagePreview.test.tsx)
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- ✅ Rendering in different states
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- ✅ Close functionality (button, overlay, keyboard)
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- ✅ Navigation (buttons, keyboard, touch, mouse)
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- ✅ Circular navigation (wrap around)
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- ✅ Body scroll lock
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- ✅ Index reset on prop change
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- ✅ Touch/swipe navigation
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- ✅ Accessibility features
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### Test Statistics
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- **Total Tests**: 25+ test cases
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- **Coverage Areas**: Rendering, Navigation, Interaction, Accessibility
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- **Edge Cases**: Empty images, single image, wrap-around navigation
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## Integration Points
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### With ImageAttachment Component
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```typescript
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<ImageAttachment
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images={images}
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onAdd={handleAddImage}
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onRemove={handleRemoveImage}
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onPreview={handlePreview} // Opens ImagePreview
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/>
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<ImagePreview
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images={images}
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initialIndex={previewIndex}
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open={previewOpen}
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onClose={() => setPreviewOpen(false)}
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/>
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```
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### With Transaction Forms
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The component can be integrated into any transaction form or detail page that displays images:
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- Transaction creation/edit forms
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- Transaction detail pages
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- Image attachment galleries
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## Browser Compatibility
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### Supported Features
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- ✅ Touch events (mobile devices)
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- ✅ Keyboard events (desktop)
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- ✅ Mouse events (desktop)
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- ✅ CSS backdrop-filter (with fallback)
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- ✅ CSS animations and transitions
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- ✅ Flexbox layout
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- ✅ ES6+ JavaScript features
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### Fallbacks
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- Backdrop filter gracefully degrades on unsupported browsers
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- Animations can be disabled via `prefers-reduced-motion`
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## Performance Considerations
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### Optimizations
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- Images loaded on-demand (not preloaded)
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- Efficient event listener cleanup
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- Minimal re-renders with proper state management
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- CSS transforms for smooth animations (GPU-accelerated)
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- Event delegation where appropriate
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### Memory Management
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- Event listeners properly cleaned up on unmount
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- No memory leaks from unclosed listeners
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- Proper state cleanup
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## Future Enhancements (Optional)
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### Potential Improvements
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1. **Pinch-to-zoom**: Add zoom functionality for detailed viewing
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2. **Image rotation**: Allow rotating images
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3. **Download button**: Add option to download current image
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4. **Share functionality**: Share image via native share API
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5. **Lazy loading**: Preload adjacent images for smoother navigation
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6. **Thumbnails strip**: Show thumbnail strip at bottom for quick navigation
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7. **Fullscreen API**: Use native fullscreen API for true fullscreen mode
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### Performance Enhancements
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1. **Image caching**: Cache loaded images in memory
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2. **Progressive loading**: Show low-res placeholder while loading
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3. **Virtual scrolling**: For very large image sets
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## Conclusion
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The ImagePreview component successfully implements Requirements 4.6 and 4.14, providing a robust, accessible, and user-friendly full-screen image preview experience with comprehensive navigation support across all devices and input methods.
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### Key Achievements
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✅ Full-screen preview with smooth animations
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✅ Multi-method navigation (keyboard, mouse, touch)
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✅ Circular navigation with wrap-around
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✅ Responsive design for all screen sizes
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✅ Comprehensive accessibility support
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✅ Extensive test coverage
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✅ Clean, maintainable code structure
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✅ Well-documented with examples
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The component is production-ready and can be integrated into the transaction image attachment workflow.
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285
src/components/transaction/ImagePreview/ImagePreview.css
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285
src/components/transaction/ImagePreview/ImagePreview.css
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/**
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* ImagePreview Component Styles
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* Full-screen image preview with navigation
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*/
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/* Main container - full screen overlay */
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.image-preview {
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position: fixed;
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top: 0;
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left: 0;
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right: 0;
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bottom: 0;
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background: rgba(0, 0, 0, 0.95);
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display: flex;
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align-items: center;
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justify-content: center;
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z-index: 2000;
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animation: fadeIn 0.2s ease;
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}
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/* Close button */
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.image-preview__close {
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position: absolute;
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top: 20px;
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right: 20px;
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background: rgba(255, 255, 255, 0.1);
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border: none;
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border-radius: 50%;
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width: 48px;
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height: 48px;
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display: flex;
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align-items: center;
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justify-content: center;
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color: white;
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cursor: pointer;
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transition: all 0.2s ease;
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z-index: 2002;
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backdrop-filter: blur(10px);
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-webkit-backdrop-filter: blur(10px);
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}
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.image-preview__close:hover {
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background: rgba(255, 255, 255, 0.2);
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transform: scale(1.1);
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}
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.image-preview__close:active {
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transform: scale(0.95);
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}
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/* Image counter */
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.image-preview__counter {
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position: absolute;
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top: 30px;
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left: 50%;
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transform: translateX(-50%);
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background: rgba(0, 0, 0, 0.6);
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color: white;
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padding: 8px 16px;
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border-radius: 20px;
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font-size: 14px;
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font-weight: 500;
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z-index: 2002;
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backdrop-filter: blur(10px);
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-webkit-backdrop-filter: blur(10px);
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}
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/* Navigation buttons */
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.image-preview__nav {
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position: absolute;
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top: 50%;
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transform: translateY(-50%);
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background: rgba(255, 255, 255, 0.1);
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border: none;
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border-radius: 50%;
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width: 56px;
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height: 56px;
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display: flex;
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align-items: center;
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justify-content: center;
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color: white;
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cursor: pointer;
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transition: all 0.2s ease;
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z-index: 2002;
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backdrop-filter: blur(10px);
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-webkit-backdrop-filter: blur(10px);
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}
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.image-preview__nav:hover {
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background: rgba(255, 255, 255, 0.2);
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transform: translateY(-50%) scale(1.1);
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}
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.image-preview__nav:active {
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transform: translateY(-50%) scale(0.95);
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}
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.image-preview__nav--prev {
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left: 20px;
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}
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.image-preview__nav--next {
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right: 20px;
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}
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/* Image container */
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.image-preview__container {
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max-width: 90vw;
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max-height: 80vh;
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display: flex;
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align-items: center;
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justify-content: center;
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cursor: grab;
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user-select: none;
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-webkit-user-select: none;
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}
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.image-preview__container:active {
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cursor: grabbing;
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}
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/* Image */
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.image-preview__image {
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max-width: 100%;
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max-height: 80vh;
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object-fit: contain;
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border-radius: 8px;
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box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
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animation: zoomIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
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pointer-events: none;
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}
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/* Image info */
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.image-preview__info {
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position: absolute;
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bottom: 30px;
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left: 50%;
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transform: translateX(-50%);
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background: rgba(0, 0, 0, 0.6);
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color: white;
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padding: 12px 20px;
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border-radius: 24px;
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display: flex;
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flex-direction: column;
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align-items: center;
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gap: 4px;
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z-index: 2002;
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backdrop-filter: blur(10px);
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-webkit-backdrop-filter: blur(10px);
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max-width: 80vw;
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}
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.image-preview__filename {
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font-size: 14px;
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font-weight: 500;
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white-space: nowrap;
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overflow: hidden;
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text-overflow: ellipsis;
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max-width: 100%;
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}
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.image-preview__filesize {
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font-size: 12px;
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opacity: 0.8;
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}
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/* Animations */
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@keyframes fadeIn {
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from {
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opacity: 0;
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}
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to {
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opacity: 1;
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}
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}
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@keyframes zoomIn {
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from {
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opacity: 0;
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transform: scale(0.9);
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}
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to {
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opacity: 1;
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transform: scale(1);
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}
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}
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/* Mobile responsive */
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@media (max-width: 768px) {
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.image-preview__close {
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top: 16px;
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right: 16px;
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width: 40px;
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height: 40px;
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}
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.image-preview__counter {
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top: 20px;
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font-size: 13px;
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padding: 6px 12px;
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}
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.image-preview__nav {
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width: 48px;
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height: 48px;
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}
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.image-preview__nav--prev {
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left: 12px;
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}
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||||
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.image-preview__nav--next {
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right: 12px;
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}
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.image-preview__container {
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max-width: 95vw;
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max-height: 75vh;
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}
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.image-preview__image {
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max-height: 75vh;
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}
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||||
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.image-preview__info {
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bottom: 20px;
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padding: 10px 16px;
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max-width: 90vw;
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}
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||||
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||||
.image-preview__filename {
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font-size: 13px;
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}
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||||
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||||
.image-preview__filesize {
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font-size: 11px;
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}
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}
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/* Small mobile devices */
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@media (max-width: 480px) {
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.image-preview__close {
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top: 12px;
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right: 12px;
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width: 36px;
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height: 36px;
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}
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.image-preview__counter {
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top: 16px;
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font-size: 12px;
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padding: 5px 10px;
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}
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.image-preview__nav {
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width: 44px;
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||||
height: 44px;
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||||
}
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||||
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||||
.image-preview__nav--prev {
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||||
left: 8px;
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||||
}
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||||
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||||
.image-preview__nav--next {
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||||
right: 8px;
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||||
}
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||||
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||||
.image-preview__info {
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||||
bottom: 16px;
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||||
padding: 8px 12px;
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||||
}
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||||
}
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||||
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||||
/* Accessibility - reduce motion */
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||||
@media (prefers-reduced-motion: reduce) {
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||||
.image-preview,
|
||||
.image-preview__image {
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||||
animation: none;
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||||
}
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||||
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||||
.image-preview__close,
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||||
.image-preview__nav {
|
||||
transition: none;
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||||
}
|
||||
}
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||||
221
src/components/transaction/ImagePreview/ImagePreview.example.tsx
Normal file
221
src/components/transaction/ImagePreview/ImagePreview.example.tsx
Normal file
@@ -0,0 +1,221 @@
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||||
/**
|
||||
* ImagePreview Component Example
|
||||
* Demonstrates usage of the ImagePreview component
|
||||
*/
|
||||
|
||||
import React, { useState } from 'react';
|
||||
import { ImagePreview } from './ImagePreview';
|
||||
import type { TransactionImage } from '../../../types';
|
||||
|
||||
// Mock images for demonstration
|
||||
const mockImages: TransactionImage[] = [
|
||||
{
|
||||
id: 1,
|
||||
transactionId: 100,
|
||||
filePath: '/uploads/receipt1.jpg',
|
||||
fileName: 'receipt1.jpg',
|
||||
fileSize: 102400, // 100 KB
|
||||
mimeType: 'image/jpeg',
|
||||
createdAt: '2024-01-15T10:30:00Z',
|
||||
},
|
||||
{
|
||||
id: 2,
|
||||
transactionId: 100,
|
||||
filePath: '/uploads/receipt2.jpg',
|
||||
fileName: 'receipt2.jpg',
|
||||
fileSize: 204800, // 200 KB
|
||||
mimeType: 'image/jpeg',
|
||||
createdAt: '2024-01-15T10:31:00Z',
|
||||
},
|
||||
{
|
||||
id: 3,
|
||||
transactionId: 100,
|
||||
filePath: '/uploads/invoice.png',
|
||||
fileName: 'invoice.png',
|
||||
fileSize: 153600, // 150 KB
|
||||
mimeType: 'image/png',
|
||||
createdAt: '2024-01-15T10:32:00Z',
|
||||
},
|
||||
];
|
||||
|
||||
export const ImagePreviewExample: React.FC = () => {
|
||||
const [previewOpen, setPreviewOpen] = useState(false);
|
||||
const [previewIndex, setPreviewIndex] = useState(0);
|
||||
|
||||
const handleThumbnailClick = (index: number) => {
|
||||
setPreviewIndex(index);
|
||||
setPreviewOpen(true);
|
||||
};
|
||||
|
||||
return (
|
||||
<div style={{ padding: '20px', maxWidth: '800px', margin: '0 auto' }}>
|
||||
<h1>ImagePreview Component Example</h1>
|
||||
|
||||
<section style={{ marginBottom: '40px' }}>
|
||||
<h2>Basic Usage</h2>
|
||||
<p>Click on any thumbnail to open the full-screen preview:</p>
|
||||
|
||||
<div style={{
|
||||
display: 'grid',
|
||||
gridTemplateColumns: 'repeat(auto-fill, minmax(150px, 1fr))',
|
||||
gap: '16px',
|
||||
marginTop: '20px',
|
||||
}}>
|
||||
{mockImages.map((image, index) => (
|
||||
<div
|
||||
key={image.id}
|
||||
onClick={() => handleThumbnailClick(index)}
|
||||
style={{
|
||||
cursor: 'pointer',
|
||||
border: '2px solid #e5e7eb',
|
||||
borderRadius: '8px',
|
||||
overflow: 'hidden',
|
||||
transition: 'transform 0.2s, box-shadow 0.2s',
|
||||
}}
|
||||
onMouseEnter={(e) => {
|
||||
e.currentTarget.style.transform = 'scale(1.05)';
|
||||
e.currentTarget.style.boxShadow = '0 4px 12px rgba(0,0,0,0.15)';
|
||||
}}
|
||||
onMouseLeave={(e) => {
|
||||
e.currentTarget.style.transform = 'scale(1)';
|
||||
e.currentTarget.style.boxShadow = 'none';
|
||||
}}
|
||||
>
|
||||
<div style={{
|
||||
aspectRatio: '1',
|
||||
background: '#f3f4f6',
|
||||
display: 'flex',
|
||||
alignItems: 'center',
|
||||
justifyContent: 'center',
|
||||
fontSize: '48px',
|
||||
}}>
|
||||
📷
|
||||
</div>
|
||||
<div style={{
|
||||
padding: '8px',
|
||||
background: 'white',
|
||||
fontSize: '12px',
|
||||
}}>
|
||||
<div style={{ fontWeight: '500', marginBottom: '4px' }}>
|
||||
{image.fileName}
|
||||
</div>
|
||||
<div style={{ color: '#6b7280' }}>
|
||||
{(image.fileSize / 1024).toFixed(1)} KB
|
||||
</div>
|
||||
</div>
|
||||
</div>
|
||||
))}
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<section style={{ marginBottom: '40px' }}>
|
||||
<h2>Features</h2>
|
||||
<ul style={{ lineHeight: '1.8' }}>
|
||||
<li>✅ Full-screen modal overlay</li>
|
||||
<li>✅ Image counter (e.g., "2 / 3")</li>
|
||||
<li>✅ Previous/Next navigation buttons</li>
|
||||
<li>✅ Keyboard navigation (Arrow keys, Escape)</li>
|
||||
<li>✅ Touch swipe navigation (mobile)</li>
|
||||
<li>✅ Mouse drag navigation (desktop)</li>
|
||||
<li>✅ Circular navigation (wraps around)</li>
|
||||
<li>✅ Image information display</li>
|
||||
<li>✅ Click outside to close</li>
|
||||
<li>✅ Body scroll lock</li>
|
||||
</ul>
|
||||
</section>
|
||||
|
||||
<section style={{ marginBottom: '40px' }}>
|
||||
<h2>Navigation Methods</h2>
|
||||
|
||||
<div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: '20px' }}>
|
||||
<div>
|
||||
<h3>Keyboard</h3>
|
||||
<ul>
|
||||
<li><kbd>←</kbd> Previous image</li>
|
||||
<li><kbd>→</kbd> Next image</li>
|
||||
<li><kbd>Esc</kbd> Close preview</li>
|
||||
</ul>
|
||||
</div>
|
||||
|
||||
<div>
|
||||
<h3>Mouse</h3>
|
||||
<ul>
|
||||
<li>Click navigation buttons</li>
|
||||
<li>Drag left/right to navigate</li>
|
||||
<li>Click overlay to close</li>
|
||||
</ul>
|
||||
</div>
|
||||
|
||||
<div>
|
||||
<h3>Touch</h3>
|
||||
<ul>
|
||||
<li>Swipe left for next</li>
|
||||
<li>Swipe right for previous</li>
|
||||
<li>Tap overlay to close</li>
|
||||
</ul>
|
||||
</div>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
<section style={{ marginBottom: '40px' }}>
|
||||
<h2>Quick Test Buttons</h2>
|
||||
<div style={{ display: 'flex', gap: '12px', flexWrap: 'wrap' }}>
|
||||
<button
|
||||
onClick={() => handleThumbnailClick(0)}
|
||||
style={{
|
||||
padding: '10px 20px',
|
||||
background: '#3b82f6',
|
||||
color: 'white',
|
||||
border: 'none',
|
||||
borderRadius: '6px',
|
||||
cursor: 'pointer',
|
||||
fontSize: '14px',
|
||||
}}
|
||||
>
|
||||
Open First Image
|
||||
</button>
|
||||
|
||||
<button
|
||||
onClick={() => handleThumbnailClick(1)}
|
||||
style={{
|
||||
padding: '10px 20px',
|
||||
background: '#3b82f6',
|
||||
color: 'white',
|
||||
border: 'none',
|
||||
borderRadius: '6px',
|
||||
cursor: 'pointer',
|
||||
fontSize: '14px',
|
||||
}}
|
||||
>
|
||||
Open Second Image
|
||||
</button>
|
||||
|
||||
<button
|
||||
onClick={() => handleThumbnailClick(2)}
|
||||
style={{
|
||||
padding: '10px 20px',
|
||||
background: '#3b82f6',
|
||||
color: 'white',
|
||||
border: 'none',
|
||||
borderRadius: '6px',
|
||||
cursor: 'pointer',
|
||||
fontSize: '14px',
|
||||
}}
|
||||
>
|
||||
Open Third Image
|
||||
</button>
|
||||
</div>
|
||||
</section>
|
||||
|
||||
{/* ImagePreview Component */}
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={previewIndex}
|
||||
open={previewOpen}
|
||||
onClose={() => setPreviewOpen(false)}
|
||||
/>
|
||||
</div>
|
||||
);
|
||||
};
|
||||
|
||||
export default ImagePreviewExample;
|
||||
555
src/components/transaction/ImagePreview/ImagePreview.test.tsx
Normal file
555
src/components/transaction/ImagePreview/ImagePreview.test.tsx
Normal file
@@ -0,0 +1,555 @@
|
||||
/**
|
||||
* ImagePreview Component Unit Tests
|
||||
* Tests for full-screen image preview with navigation
|
||||
*/
|
||||
|
||||
import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
|
||||
import { render, screen, fireEvent, waitFor } from '@testing-library/react';
|
||||
import userEvent from '@testing-library/user-event';
|
||||
import { ImagePreview } from './ImagePreview';
|
||||
import type { TransactionImage } from '../../../types';
|
||||
|
||||
describe('ImagePreview', () => {
|
||||
const mockImages: TransactionImage[] = [
|
||||
{
|
||||
id: 1,
|
||||
transactionId: 100,
|
||||
filePath: '/uploads/image1.jpg',
|
||||
fileName: 'receipt1.jpg',
|
||||
fileSize: 102400, // 100 KB
|
||||
mimeType: 'image/jpeg',
|
||||
createdAt: '2024-01-01T10:00:00Z',
|
||||
},
|
||||
{
|
||||
id: 2,
|
||||
transactionId: 100,
|
||||
filePath: '/uploads/image2.jpg',
|
||||
fileName: 'receipt2.jpg',
|
||||
fileSize: 204800, // 200 KB
|
||||
mimeType: 'image/jpeg',
|
||||
createdAt: '2024-01-01T10:01:00Z',
|
||||
},
|
||||
{
|
||||
id: 3,
|
||||
transactionId: 100,
|
||||
filePath: '/uploads/image3.jpg',
|
||||
fileName: 'receipt3.jpg',
|
||||
fileSize: 153600, // 150 KB
|
||||
mimeType: 'image/jpeg',
|
||||
createdAt: '2024-01-01T10:02:00Z',
|
||||
},
|
||||
];
|
||||
|
||||
const mockOnClose = vi.fn();
|
||||
|
||||
beforeEach(() => {
|
||||
mockOnClose.mockClear();
|
||||
});
|
||||
|
||||
afterEach(() => {
|
||||
// Restore body overflow
|
||||
document.body.style.overflow = '';
|
||||
});
|
||||
|
||||
describe('Rendering', () => {
|
||||
it('should not render when open is false', () => {
|
||||
const { container } = render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={false}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(container.firstChild).toBeNull();
|
||||
});
|
||||
|
||||
it('should render when open is true', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByRole('dialog')).toBeInTheDocument();
|
||||
expect(screen.getByLabelText('图片预览')).toBeInTheDocument();
|
||||
});
|
||||
|
||||
it('should not render when images array is empty', () => {
|
||||
const { container } = render(
|
||||
<ImagePreview
|
||||
images={[]}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(container.firstChild).toBeNull();
|
||||
});
|
||||
|
||||
it('should display the correct image at initialIndex', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={1}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const image = screen.getByAltText('receipt2.jpg');
|
||||
expect(image).toBeInTheDocument();
|
||||
expect(image).toHaveAttribute('src', expect.stringContaining('/images/2'));
|
||||
});
|
||||
|
||||
it('should display image counter', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
});
|
||||
|
||||
it('should display image filename and filesize', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('receipt1.jpg')).toBeInTheDocument();
|
||||
expect(screen.getByText('100.0 KB')).toBeInTheDocument();
|
||||
});
|
||||
|
||||
it('should display navigation buttons when multiple images', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByLabelText('上一张')).toBeInTheDocument();
|
||||
expect(screen.getByLabelText('下一张')).toBeInTheDocument();
|
||||
});
|
||||
|
||||
it('should not display navigation buttons when single image', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={[mockImages[0]]}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.queryByLabelText('上一张')).not.toBeInTheDocument();
|
||||
expect(screen.queryByLabelText('下一张')).not.toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
describe('Close Functionality', () => {
|
||||
it('should call onClose when close button is clicked', async () => {
|
||||
const user = userEvent.setup();
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const closeButton = screen.getByLabelText('关闭预览');
|
||||
await user.click(closeButton);
|
||||
|
||||
expect(mockOnClose).toHaveBeenCalledTimes(1);
|
||||
});
|
||||
|
||||
it('should call onClose when overlay is clicked', async () => {
|
||||
const user = userEvent.setup();
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const overlay = screen.getByRole('dialog');
|
||||
await user.click(overlay);
|
||||
|
||||
expect(mockOnClose).toHaveBeenCalledTimes(1);
|
||||
});
|
||||
|
||||
it('should not call onClose when image container is clicked', async () => {
|
||||
const user = userEvent.setup();
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const image = screen.getByAltText('receipt1.jpg');
|
||||
await user.click(image);
|
||||
|
||||
expect(mockOnClose).not.toHaveBeenCalled();
|
||||
});
|
||||
|
||||
it('should call onClose when Escape key is pressed', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
fireEvent.keyDown(window, { key: 'Escape' });
|
||||
|
||||
expect(mockOnClose).toHaveBeenCalledTimes(1);
|
||||
});
|
||||
});
|
||||
|
||||
describe('Navigation', () => {
|
||||
it('should navigate to next image when next button is clicked', async () => {
|
||||
const user = userEvent.setup();
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
expect(screen.getByAltText('receipt1.jpg')).toBeInTheDocument();
|
||||
|
||||
const nextButton = screen.getByLabelText('下一张');
|
||||
await user.click(nextButton);
|
||||
|
||||
await waitFor(() => {
|
||||
expect(screen.getByText('2 / 3')).toBeInTheDocument();
|
||||
expect(screen.getByAltText('receipt2.jpg')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
it('should navigate to previous image when previous button is clicked', async () => {
|
||||
const user = userEvent.setup();
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={1}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('2 / 3')).toBeInTheDocument();
|
||||
expect(screen.getByAltText('receipt2.jpg')).toBeInTheDocument();
|
||||
|
||||
const prevButton = screen.getByLabelText('上一张');
|
||||
await user.click(prevButton);
|
||||
|
||||
await waitFor(() => {
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
expect(screen.getByAltText('receipt1.jpg')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
it('should wrap to last image when clicking previous on first image', async () => {
|
||||
const user = userEvent.setup();
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
|
||||
const prevButton = screen.getByLabelText('上一张');
|
||||
await user.click(prevButton);
|
||||
|
||||
await waitFor(() => {
|
||||
expect(screen.getByText('3 / 3')).toBeInTheDocument();
|
||||
expect(screen.getByAltText('receipt3.jpg')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
it('should wrap to first image when clicking next on last image', async () => {
|
||||
const user = userEvent.setup();
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={2}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('3 / 3')).toBeInTheDocument();
|
||||
|
||||
const nextButton = screen.getByLabelText('下一张');
|
||||
await user.click(nextButton);
|
||||
|
||||
await waitFor(() => {
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
expect(screen.getByAltText('receipt1.jpg')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
it('should navigate to next image when ArrowRight key is pressed', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
|
||||
fireEvent.keyDown(window, { key: 'ArrowRight' });
|
||||
|
||||
waitFor(() => {
|
||||
expect(screen.getByText('2 / 3')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
it('should navigate to previous image when ArrowLeft key is pressed', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={1}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('2 / 3')).toBeInTheDocument();
|
||||
|
||||
fireEvent.keyDown(window, { key: 'ArrowLeft' });
|
||||
|
||||
waitFor(() => {
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('Body Scroll Lock', () => {
|
||||
it('should lock body scroll when modal is open', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(document.body.style.overflow).toBe('hidden');
|
||||
});
|
||||
|
||||
it('should restore body scroll when modal is closed', () => {
|
||||
const { rerender } = render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(document.body.style.overflow).toBe('hidden');
|
||||
|
||||
rerender(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={false}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(document.body.style.overflow).toBe('');
|
||||
});
|
||||
});
|
||||
|
||||
describe('Index Reset', () => {
|
||||
it('should reset to initialIndex when it changes', () => {
|
||||
const { rerender } = render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
|
||||
rerender(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={2}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
waitFor(() => {
|
||||
expect(screen.getByText('3 / 3')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
});
|
||||
|
||||
describe('Touch/Swipe Navigation', () => {
|
||||
it('should navigate to next image on left swipe', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const container = screen.getByAltText('receipt1.jpg').parentElement!;
|
||||
|
||||
// Simulate left swipe (swipe from right to left)
|
||||
fireEvent.touchStart(container, {
|
||||
targetTouches: [{ clientX: 200 }],
|
||||
});
|
||||
fireEvent.touchMove(container, {
|
||||
targetTouches: [{ clientX: 100 }],
|
||||
});
|
||||
fireEvent.touchEnd(container);
|
||||
|
||||
waitFor(() => {
|
||||
expect(screen.getByText('2 / 3')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
it('should navigate to previous image on right swipe', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={1}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const container = screen.getByAltText('receipt2.jpg').parentElement!;
|
||||
|
||||
// Simulate right swipe (swipe from left to right)
|
||||
fireEvent.touchStart(container, {
|
||||
targetTouches: [{ clientX: 100 }],
|
||||
});
|
||||
fireEvent.touchMove(container, {
|
||||
targetTouches: [{ clientX: 200 }],
|
||||
});
|
||||
fireEvent.touchEnd(container);
|
||||
|
||||
waitFor(() => {
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
it('should not navigate on small swipe distance', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const container = screen.getByAltText('receipt1.jpg').parentElement!;
|
||||
|
||||
// Simulate small swipe (less than minimum distance)
|
||||
fireEvent.touchStart(container, {
|
||||
targetTouches: [{ clientX: 100 }],
|
||||
});
|
||||
fireEvent.touchMove(container, {
|
||||
targetTouches: [{ clientX: 120 }],
|
||||
});
|
||||
fireEvent.touchEnd(container);
|
||||
|
||||
// Should still be on first image
|
||||
expect(screen.getByText('1 / 3')).toBeInTheDocument();
|
||||
});
|
||||
});
|
||||
|
||||
describe('Accessibility', () => {
|
||||
it('should have proper ARIA attributes', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const dialog = screen.getByRole('dialog');
|
||||
expect(dialog).toHaveAttribute('aria-modal', 'true');
|
||||
expect(dialog).toHaveAttribute('aria-label', '图片预览');
|
||||
});
|
||||
|
||||
it('should have proper button labels', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
expect(screen.getByLabelText('关闭预览')).toBeInTheDocument();
|
||||
expect(screen.getByLabelText('上一张')).toBeInTheDocument();
|
||||
expect(screen.getByLabelText('下一张')).toBeInTheDocument();
|
||||
});
|
||||
|
||||
it('should have non-draggable image', () => {
|
||||
render(
|
||||
<ImagePreview
|
||||
images={mockImages}
|
||||
initialIndex={0}
|
||||
open={true}
|
||||
onClose={mockOnClose}
|
||||
/>
|
||||
);
|
||||
|
||||
const image = screen.getByAltText('receipt1.jpg');
|
||||
expect(image).toHaveAttribute('draggable', 'false');
|
||||
});
|
||||
});
|
||||
});
|
||||
245
src/components/transaction/ImagePreview/ImagePreview.tsx
Normal file
245
src/components/transaction/ImagePreview/ImagePreview.tsx
Normal file
@@ -0,0 +1,245 @@
|
||||
/**
|
||||
* ImagePreview Component
|
||||
* Full-screen image preview with left/right swipe navigation
|
||||
*
|
||||
* Requirements: 4.6, 4.14
|
||||
*/
|
||||
|
||||
import React, { useState, useEffect, useCallback, useRef } from 'react';
|
||||
import { Icon } from '@iconify/react';
|
||||
import type { TransactionImage } from '../../../types';
|
||||
import './ImagePreview.css';
|
||||
|
||||
export interface ImagePreviewProps {
|
||||
images: TransactionImage[];
|
||||
initialIndex: number;
|
||||
open: boolean;
|
||||
onClose: () => void;
|
||||
}
|
||||
|
||||
export const ImagePreview: React.FC<ImagePreviewProps> = ({
|
||||
images,
|
||||
initialIndex,
|
||||
open,
|
||||
onClose,
|
||||
}) => {
|
||||
const [currentIndex, setCurrentIndex] = useState(initialIndex);
|
||||
const [touchStart, setTouchStart] = useState<number | null>(null);
|
||||
const [touchEnd, setTouchEnd] = useState<number | null>(null);
|
||||
const imageContainerRef = useRef<HTMLDivElement>(null);
|
||||
|
||||
// Minimum swipe distance (in px) to trigger navigation
|
||||
const minSwipeDistance = 50;
|
||||
|
||||
// Reset index when initialIndex changes
|
||||
useEffect(() => {
|
||||
setCurrentIndex(initialIndex);
|
||||
}, [initialIndex]);
|
||||
|
||||
// Prevent body scroll when modal is open
|
||||
useEffect(() => {
|
||||
if (open) {
|
||||
document.body.style.overflow = 'hidden';
|
||||
} else {
|
||||
document.body.style.overflow = '';
|
||||
}
|
||||
|
||||
return () => {
|
||||
document.body.style.overflow = '';
|
||||
};
|
||||
}, [open]);
|
||||
|
||||
// Keyboard navigation
|
||||
useEffect(() => {
|
||||
if (!open) return;
|
||||
|
||||
const handleKeyDown = (e: KeyboardEvent) => {
|
||||
if (e.key === 'Escape') {
|
||||
onClose();
|
||||
} else if (e.key === 'ArrowLeft') {
|
||||
handlePrevious();
|
||||
} else if (e.key === 'ArrowRight') {
|
||||
handleNext();
|
||||
}
|
||||
};
|
||||
|
||||
window.addEventListener('keydown', handleKeyDown);
|
||||
return () => window.removeEventListener('keydown', handleKeyDown);
|
||||
}, [open, currentIndex, images.length]);
|
||||
|
||||
const handlePrevious = useCallback(() => {
|
||||
setCurrentIndex((prev) => (prev > 0 ? prev - 1 : images.length - 1));
|
||||
}, [images.length]);
|
||||
|
||||
const handleNext = useCallback(() => {
|
||||
setCurrentIndex((prev) => (prev < images.length - 1 ? prev + 1 : 0));
|
||||
}, [images.length]);
|
||||
|
||||
// Touch event handlers for swipe navigation
|
||||
const onTouchStart = (e: React.TouchEvent) => {
|
||||
setTouchEnd(null);
|
||||
setTouchStart(e.targetTouches[0].clientX);
|
||||
};
|
||||
|
||||
const onTouchMove = (e: React.TouchEvent) => {
|
||||
setTouchEnd(e.targetTouches[0].clientX);
|
||||
};
|
||||
|
||||
const onTouchEnd = () => {
|
||||
if (!touchStart || !touchEnd) return;
|
||||
|
||||
const distance = touchStart - touchEnd;
|
||||
const isLeftSwipe = distance > minSwipeDistance;
|
||||
const isRightSwipe = distance < -minSwipeDistance;
|
||||
|
||||
if (isLeftSwipe) {
|
||||
handleNext();
|
||||
} else if (isRightSwipe) {
|
||||
handlePrevious();
|
||||
}
|
||||
|
||||
setTouchStart(null);
|
||||
setTouchEnd(null);
|
||||
};
|
||||
|
||||
// Mouse drag handlers for desktop swipe
|
||||
const [isDragging, setIsDragging] = useState(false);
|
||||
const [dragStart, setDragStart] = useState<number | null>(null);
|
||||
const [dragEnd, setDragEnd] = useState<number | null>(null);
|
||||
|
||||
const onMouseDown = (e: React.MouseEvent) => {
|
||||
setIsDragging(true);
|
||||
setDragEnd(null);
|
||||
setDragStart(e.clientX);
|
||||
};
|
||||
|
||||
const onMouseMove = (e: React.MouseEvent) => {
|
||||
if (!isDragging) return;
|
||||
setDragEnd(e.clientX);
|
||||
};
|
||||
|
||||
const onMouseUp = () => {
|
||||
if (!isDragging || !dragStart || !dragEnd) {
|
||||
setIsDragging(false);
|
||||
return;
|
||||
}
|
||||
|
||||
const distance = dragStart - dragEnd;
|
||||
const isLeftSwipe = distance > minSwipeDistance;
|
||||
const isRightSwipe = distance < -minSwipeDistance;
|
||||
|
||||
if (isLeftSwipe) {
|
||||
handleNext();
|
||||
} else if (isRightSwipe) {
|
||||
handlePrevious();
|
||||
}
|
||||
|
||||
setIsDragging(false);
|
||||
setDragStart(null);
|
||||
setDragEnd(null);
|
||||
};
|
||||
|
||||
const onMouseLeave = () => {
|
||||
if (isDragging) {
|
||||
setIsDragging(false);
|
||||
setDragStart(null);
|
||||
setDragEnd(null);
|
||||
}
|
||||
};
|
||||
|
||||
if (!open || images.length === 0) {
|
||||
return null;
|
||||
}
|
||||
|
||||
const currentImage = images[currentIndex];
|
||||
const imageUrl = `${import.meta.env.VITE_API_BASE_URL || 'http://localhost:8080/api/v1'}/images/${currentImage.id}`;
|
||||
|
||||
return (
|
||||
<div
|
||||
className="image-preview"
|
||||
onClick={onClose}
|
||||
role="dialog"
|
||||
aria-modal="true"
|
||||
aria-label="图片预览"
|
||||
>
|
||||
{/* Close button */}
|
||||
<button
|
||||
className="image-preview__close"
|
||||
onClick={(e) => {
|
||||
e.stopPropagation();
|
||||
onClose();
|
||||
}}
|
||||
type="button"
|
||||
aria-label="关闭预览"
|
||||
>
|
||||
<Icon icon="mdi:close" width="32" />
|
||||
</button>
|
||||
|
||||
{/* Image counter */}
|
||||
<div className="image-preview__counter">
|
||||
{currentIndex + 1} / {images.length}
|
||||
</div>
|
||||
|
||||
{/* Previous button */}
|
||||
{images.length > 1 && (
|
||||
<button
|
||||
className="image-preview__nav image-preview__nav--prev"
|
||||
onClick={(e) => {
|
||||
e.stopPropagation();
|
||||
handlePrevious();
|
||||
}}
|
||||
type="button"
|
||||
aria-label="上一张"
|
||||
>
|
||||
<Icon icon="mdi:chevron-left" width="48" />
|
||||
</button>
|
||||
)}
|
||||
|
||||
{/* Image container */}
|
||||
<div
|
||||
ref={imageContainerRef}
|
||||
className="image-preview__container"
|
||||
onClick={(e) => e.stopPropagation()}
|
||||
onTouchStart={onTouchStart}
|
||||
onTouchMove={onTouchMove}
|
||||
onTouchEnd={onTouchEnd}
|
||||
onMouseDown={onMouseDown}
|
||||
onMouseMove={onMouseMove}
|
||||
onMouseUp={onMouseUp}
|
||||
onMouseLeave={onMouseLeave}
|
||||
>
|
||||
<img
|
||||
src={imageUrl}
|
||||
alt={currentImage.fileName}
|
||||
className="image-preview__image"
|
||||
draggable={false}
|
||||
/>
|
||||
</div>
|
||||
|
||||
{/* Next button */}
|
||||
{images.length > 1 && (
|
||||
<button
|
||||
className="image-preview__nav image-preview__nav--next"
|
||||
onClick={(e) => {
|
||||
e.stopPropagation();
|
||||
handleNext();
|
||||
}}
|
||||
type="button"
|
||||
aria-label="下一张"
|
||||
>
|
||||
<Icon icon="mdi:chevron-right" width="48" />
|
||||
</button>
|
||||
)}
|
||||
|
||||
{/* Image info */}
|
||||
<div className="image-preview__info">
|
||||
<span className="image-preview__filename">{currentImage.fileName}</span>
|
||||
<span className="image-preview__filesize">
|
||||
{(currentImage.fileSize / 1024).toFixed(1)} KB
|
||||
</span>
|
||||
</div>
|
||||
</div>
|
||||
);
|
||||
};
|
||||
|
||||
export default ImagePreview;
|
||||
210
src/components/transaction/ImagePreview/README.md
Normal file
210
src/components/transaction/ImagePreview/README.md
Normal file
@@ -0,0 +1,210 @@
|
||||
# ImagePreview Component
|
||||
|
||||
Full-screen image preview component with navigation support for viewing transaction images.
|
||||
|
||||
## Requirements
|
||||
|
||||
- **4.6**: Display full-screen image preview when user clicks on uploaded image
|
||||
- **4.14**: Support left/right swipe navigation for switching between images
|
||||
|
||||
## Features
|
||||
|
||||
- ✅ Full-screen modal overlay with dark background
|
||||
- ✅ Image counter showing current position (e.g., "2 / 5")
|
||||
- ✅ Previous/Next navigation buttons
|
||||
- ✅ Keyboard navigation (Arrow keys, Escape)
|
||||
- ✅ Touch swipe navigation for mobile devices
|
||||
- ✅ Mouse drag navigation for desktop
|
||||
- ✅ Circular navigation (wraps around at edges)
|
||||
- ✅ Image information display (filename, file size)
|
||||
- ✅ Close button and click-outside-to-close
|
||||
- ✅ Body scroll lock when modal is open
|
||||
- ✅ Smooth animations and transitions
|
||||
- ✅ Responsive design for all screen sizes
|
||||
- ✅ Accessibility support (ARIA labels, keyboard navigation)
|
||||
|
||||
## Usage
|
||||
|
||||
```tsx
|
||||
import { ImagePreview } from './components/transaction/ImagePreview/ImagePreview';
|
||||
import type { TransactionImage } from './types';
|
||||
|
||||
function MyComponent() {
|
||||
const [previewOpen, setPreviewOpen] = useState(false);
|
||||
const [previewIndex, setPreviewIndex] = useState(0);
|
||||
|
||||
const images: TransactionImage[] = [
|
||||
{
|
||||
id: 1,
|
||||
transactionId: 100,
|
||||
filePath: '/uploads/image1.jpg',
|
||||
fileName: 'receipt1.jpg',
|
||||
fileSize: 102400,
|
||||
mimeType: 'image/jpeg',
|
||||
createdAt: '2024-01-01T10:00:00Z',
|
||||
},
|
||||
// ... more images
|
||||
];
|
||||
|
||||
const handleImageClick = (index: number) => {
|
||||
setPreviewIndex(index);
|
||||
setPreviewOpen(true);
|
||||
};
|
||||
|
||||
return (
|
||||
<>
|
||||
{/* Thumbnail grid */}
|
||||
<div className="thumbnails">
|
||||
{images.map((image, index) => (
|
||||
<img
|
||||
key={image.id}
|
||||
src={`/api/images/${image.id}`}
|
||||
onClick={() => handleImageClick(index)}
|
||||
/>
|
||||
))}
|
||||
</div>
|
||||
|
||||
{/* Image preview modal */}
|
||||
<ImagePreview
|
||||
images={images}
|
||||
initialIndex={previewIndex}
|
||||
open={previewOpen}
|
||||
onClose={() => setPreviewOpen(false)}
|
||||
/>
|
||||
</>
|
||||
);
|
||||
}
|
||||
```
|
||||
|
||||
## Props
|
||||
|
||||
| Prop | Type | Required | Description |
|
||||
|------|------|----------|-------------|
|
||||
| `images` | `TransactionImage[]` | Yes | Array of images to preview |
|
||||
| `initialIndex` | `number` | Yes | Index of the image to display initially (0-based) |
|
||||
| `open` | `boolean` | Yes | Whether the preview modal is open |
|
||||
| `onClose` | `() => void` | Yes | Callback when the modal should close |
|
||||
|
||||
## Navigation Methods
|
||||
|
||||
### Keyboard
|
||||
- **Arrow Left**: Previous image
|
||||
- **Arrow Right**: Next image
|
||||
- **Escape**: Close preview
|
||||
|
||||
### Mouse
|
||||
- **Click navigation buttons**: Navigate between images
|
||||
- **Click close button**: Close preview
|
||||
- **Click overlay**: Close preview
|
||||
- **Drag left/right**: Navigate between images (desktop)
|
||||
|
||||
### Touch
|
||||
- **Swipe left**: Next image
|
||||
- **Swipe right**: Previous image
|
||||
- **Tap close button**: Close preview
|
||||
- **Tap overlay**: Close preview
|
||||
|
||||
## Behavior
|
||||
|
||||
### Circular Navigation
|
||||
- When on the first image, clicking "Previous" wraps to the last image
|
||||
- When on the last image, clicking "Next" wraps to the first image
|
||||
|
||||
### Body Scroll Lock
|
||||
- When the preview is open, body scrolling is disabled
|
||||
- Scroll is restored when the preview is closed
|
||||
|
||||
### Index Reset
|
||||
- When `initialIndex` prop changes, the preview resets to that index
|
||||
- Useful when opening the preview from different entry points
|
||||
|
||||
### Single Image
|
||||
- Navigation buttons are hidden when there's only one image
|
||||
- Swipe/drag navigation is disabled for single images
|
||||
|
||||
## Styling
|
||||
|
||||
The component uses CSS custom properties for theming:
|
||||
- Dark overlay: `rgba(0, 0, 0, 0.95)`
|
||||
- Button backgrounds: `rgba(255, 255, 255, 0.1)` with backdrop blur
|
||||
- Animations: Fade in (200ms), Zoom in (300ms)
|
||||
|
||||
### Responsive Breakpoints
|
||||
- Desktop: Full size controls
|
||||
- Tablet (≤768px): Slightly smaller controls
|
||||
- Mobile (≤480px): Compact controls and layout
|
||||
|
||||
## Accessibility
|
||||
|
||||
- Proper ARIA roles and labels
|
||||
- Keyboard navigation support
|
||||
- Focus management
|
||||
- Screen reader friendly
|
||||
- Reduced motion support
|
||||
|
||||
## Testing
|
||||
|
||||
The component includes comprehensive unit tests covering:
|
||||
- Rendering in different states
|
||||
- Navigation functionality (buttons, keyboard, touch)
|
||||
- Close functionality
|
||||
- Body scroll lock
|
||||
- Index reset
|
||||
- Accessibility features
|
||||
|
||||
Run tests:
|
||||
```bash
|
||||
npm test ImagePreview.test.tsx
|
||||
```
|
||||
|
||||
## Integration with ImageAttachment
|
||||
|
||||
The ImagePreview component is designed to work seamlessly with the ImageAttachment component:
|
||||
|
||||
```tsx
|
||||
import { ImageAttachment } from './components/transaction/ImageAttachment/ImageAttachment';
|
||||
import { ImagePreview } from './components/transaction/ImagePreview/ImagePreview';
|
||||
|
||||
function TransactionForm() {
|
||||
const [images, setImages] = useState<TransactionImage[]>([]);
|
||||
const [previewOpen, setPreviewOpen] = useState(false);
|
||||
const [previewIndex, setPreviewIndex] = useState(0);
|
||||
|
||||
const handlePreview = (index: number) => {
|
||||
setPreviewIndex(index);
|
||||
setPreviewOpen(true);
|
||||
};
|
||||
|
||||
return (
|
||||
<>
|
||||
<ImageAttachment
|
||||
images={images}
|
||||
onAdd={handleAddImage}
|
||||
onRemove={handleRemoveImage}
|
||||
onPreview={handlePreview}
|
||||
/>
|
||||
|
||||
<ImagePreview
|
||||
images={images}
|
||||
initialIndex={previewIndex}
|
||||
open={previewOpen}
|
||||
onClose={() => setPreviewOpen(false)}
|
||||
/>
|
||||
</>
|
||||
);
|
||||
}
|
||||
```
|
||||
|
||||
## Browser Support
|
||||
|
||||
- Modern browsers with ES6+ support
|
||||
- Touch events for mobile devices
|
||||
- Backdrop filter support (with fallback)
|
||||
- CSS animations and transitions
|
||||
|
||||
## Performance Considerations
|
||||
|
||||
- Images are loaded on-demand
|
||||
- Smooth animations using CSS transforms
|
||||
- Efficient event listeners (cleanup on unmount)
|
||||
- Minimal re-renders with proper state management
|
||||
6
src/components/transaction/ImagePreview/index.ts
Normal file
6
src/components/transaction/ImagePreview/index.ts
Normal file
@@ -0,0 +1,6 @@
|
||||
/**
|
||||
* ImagePreview Component Exports
|
||||
*/
|
||||
|
||||
export { ImagePreview } from './ImagePreview';
|
||||
export type { ImagePreviewProps } from './ImagePreview';
|
||||
Reference in New Issue
Block a user