# ROA2WEB Mobile Patterns Library

**Version:** 1.0.0
**Last Updated:** 2026-01-12
**Status:** ✅ Complete

---

## Table of Contents

1. [Quick Start](#quick-start)
2. [Mobile Layout Overview](#mobile-layout-overview)
3. [MobileTopBar](#mobiletopbar)
4. [MobileBottomNav](#mobilebottomnav)
5. [MobileSelectionFooter](#mobileselectionfooter)
6. [BottomSheet](#bottomsheet)
7. [SwipeableCards](#swipeablecards)
8. [Design Tokens for Mobile](#design-tokens-for-mobile)
9. [Best Practices](#best-practices)
10. [Troubleshooting](#troubleshooting)

---

## Quick Start

### For New Developers

Get a mobile view running in **5 minutes**:

```vue
<template>
  <div class="mobile-view">
    <!-- 1. Top Bar -->
    <MobileTopBar
      title="My View"
      :showMenu="true"
      :actions="topBarActions"
      @menu-click="toggleSidebar"
      @action-click="handleAction"
    />

    <!-- 2. Main Content (with padding for fixed bars) -->
    <main class="mobile-content">
      <!-- Your content here -->
    </main>

    <!-- 3. Bottom Navigation -->
    <MobileBottomNav :items="navItems" />
  </div>
</template>

<script setup>
import MobileTopBar from '@shared/components/mobile/MobileTopBar.vue'
import MobileBottomNav from '@shared/components/mobile/MobileBottomNav.vue'

const topBarActions = [
  { icon: 'pi pi-filter', label: 'Filter', tooltip: 'Filtrează' }
]

const navItems = [
  { to: '/data-entry', icon: 'pi pi-receipt', label: 'Bonuri' },
  { to: '/reports', icon: 'pi pi-chart-bar', label: 'Rapoarte' }
]
</script>

<style scoped>
.mobile-content {
  padding-top: 56px;    /* MobileTopBar height */
  padding-bottom: 56px; /* MobileBottomNav height */
  min-height: 100vh;
}
</style>
```

### Import Paths

All mobile components are located in `src/shared/components/mobile/`:

```javascript
import MobileTopBar from '@shared/components/mobile/MobileTopBar.vue'
import MobileBottomNav from '@shared/components/mobile/MobileBottomNav.vue'
import MobileSelectionFooter from '@shared/components/mobile/MobileSelectionFooter.vue'
import BottomSheet from '@shared/components/mobile/BottomSheet.vue'
import SwipeableCards from '@shared/components/mobile/SwipeableCards.vue'
```

---

## Mobile Layout Overview

### ASCII Diagram: Standard Mobile Layout

```
┌─────────────────────────────────────────┐
│         MobileTopBar (56px)             │
│  [≡]        Page Title        [🔍] [⋮]  │
├─────────────────────────────────────────┤
│                                         │
│                                         │
│              MAIN CONTENT               │
│                                         │
│         (scrollable area)               │
│                                         │
│     padding-top: 56px                   │
│     padding-bottom: 56px                │
│                                         │
│                                         │
├─────────────────────────────────────────┤
│        MobileBottomNav (56px)           │
│   🏠      📋      📊      ⚙️            │
│  Home   Upload  Reports  Settings       │
└─────────────────────────────────────────┘
```

### ASCII Diagram: Selection Mode Layout

```
┌─────────────────────────────────────────┐
│      MobileTopBar (selection-active)    │
│  [←]      "3 selectate"      [☑] [✕]   │
├─────────────────────────────────────────┤
│                                         │
│     ☑ Item 1                            │
│     ☐ Item 2                            │
│     ☑ Item 3                            │
│     ☑ Item 4                            │
│     ☐ Item 5                            │
│                                         │
│                                         │
├─────────────────────────────────────────┤
│      MobileSelectionFooter              │
│  ┌──────────┐    ┌──────────┐          │
│  │  🗑 Șterge │    │ 📤 Export │          │
│  └──────────┘    └──────────┘          │
└─────────────────────────────────────────┘
```

### ASCII Diagram: BottomSheet Open

```
┌─────────────────────────────────────────┐
│         MobileTopBar (56px)             │
├─────────────────────────────────────────┤
│ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │
│ ░░░░░░░░░░░░ OVERLAY ░░░░░░░░░░░░░░░░░░ │
│ ░░░░░░░░░░ (tap to close) ░░░░░░░░░░░░░ │
│ ░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░ │
├─────────────────────────────────────────┤  ←─ BottomSheet
│            ───────────                  │     slides up
│            (drag handle)                │
│                                         │
│     Filter Options:                     │
│     ☐ Option A                          │
│     ☑ Option B                          │
│     ☐ Option C                          │
│                                         │
│     [  Apply Filters  ]                 │
│                                         │
└─────────────────────────────────────────┘
```

### ASCII Diagram: SwipeableCards

```
┌─────────────────────────────────────────┐
│                                         │
│ ┌─────────────────────────────────────┐ │
│ │                                     │ │
│ │         KPI Card Content            │ │  ← Swipe left/right
│ │                                     │ │    to navigate
│ │         $125,430                    │ │
│ │         Total Sales                 │ │
│ │                                     │ │
│ └─────────────────────────────────────┘ │
│                                         │
│              ●━━━━●───●                 │  ← Dots indicator
│                                         │    (active = expanded)
└─────────────────────────────────────────┘
```

---

## MobileTopBar

Material Design 3 inspired top navigation bar for mobile views.

### Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `title` | String | `''` | Center title text |
| `showBack` | Boolean | `false` | Show back arrow button on left |
| `showMenu` | Boolean | `false` | Show hamburger menu on left (ignored if showBack is true) |
| `actions` | Array | `[]` | Right-side action buttons |
| `selectionActive` | Boolean | `false` | Enable selection mode styling |

### Events

| Event | Payload | Description |
|-------|---------|-------------|
| `menu-click` | - | Hamburger menu clicked |
| `back-click` | - | Back arrow clicked |
| `action-click` | `action` | Action button clicked |

### Action Object Structure

```typescript
interface TopBarAction {
  icon: string      // PrimeIcons class (e.g., 'pi pi-filter')
  label?: string    // Accessibility label
  tooltip?: string  // Tooltip text
  active?: boolean  // Highlight when active
}
```

### Basic Usage

```vue
<template>
  <MobileTopBar
    title="Bonuri Fiscale"
    :showMenu="true"
    :actions="topBarActions"
    @menu-click="showSidebar = true"
    @action-click="handleAction"
  />
</template>

<script setup>
const topBarActions = [
  { icon: 'pi pi-filter', label: 'Filtrează', tooltip: 'Deschide filtre' },
  { icon: 'pi pi-search', label: 'Caută', tooltip: 'Căutare' }
]

const handleAction = (action) => {
  if (action.icon === 'pi pi-filter') {
    openFilterSheet()
  }
}
</script>
```

### With Back Navigation

```vue
<MobileTopBar
  title="Detalii Bon"
  :showBack="true"
  @back-click="router.back()"
/>
```

### Selection Mode

```vue
<MobileTopBar
  :title="selectedCount > 0 ? `${selectedCount} selectate` : 'Bonuri'"
  :showBack="selectedCount > 0"
  :selectionActive="selectedCount > 0"
  :actions="selectionActions"
  @back-click="clearSelection"
/>
```

### CSS Classes

| Class | Description |
|-------|-------------|
| `.mobile-top-bar` | Base container (fixed, 56px height) |
| `.selection-active` | Blue background for selection mode |
| `.top-bar-left` | Left button container |
| `.top-bar-right` | Right action buttons container |
| `.top-bar-title` | Center title (ellipsis on overflow) |
| `.top-bar-btn` | Individual button (48x48px touch target) |
| `.top-bar-btn.active` | Highlighted state |

---

## MobileBottomNav

Material Design 3 inspired bottom navigation bar with router integration.

### Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `items` | Array | Default nav items | Navigation items array |

### Events

| Event | Payload | Description |
|-------|---------|-------------|
| `item-click` | `item` | Non-router item clicked |

### Item Object Structure

```typescript
interface NavItem {
  to?: string       // Route path (uses router-link when provided)
  icon: string      // PrimeIcons class (e.g., 'pi pi-receipt')
  label: string     // Display text
  active?: boolean  // Force active state (for non-router items)
}
```

### Default Items

```javascript
[
  { to: '/data-entry', icon: 'pi pi-receipt', label: 'Bonuri' },
  { icon: 'pi pi-cloud-upload', label: 'Upload' },  // Action button
  { to: '/reports/dashboard', icon: 'pi pi-chart-bar', label: 'Rapoarte' },
  { to: '/data-entry/ocr-metrics', icon: 'pi pi-cog', label: 'Setări' }
]
```

### Basic Usage

```vue
<template>
  <MobileBottomNav />
</template>
```

### Custom Items

```vue
<template>
  <MobileBottomNav
    :items="customItems"
    @item-click="handleNavClick"
  />
</template>

<script setup>
const customItems = [
  { to: '/home', icon: 'pi pi-home', label: 'Acasă' },
  { to: '/reports', icon: 'pi pi-chart-bar', label: 'Rapoarte' },
  { icon: 'pi pi-plus', label: 'Adaugă' },  // Button, not route
  { to: '/settings', icon: 'pi pi-cog', label: 'Setări' }
]

const handleNavClick = (item) => {
  if (item.label === 'Adaugă') {
    showAddDialog()
  }
}
</script>
```

### CSS Classes

| Class | Description |
|-------|-------------|
| `.mobile-bottom-nav` | Base container (fixed, 56px height) |
| `.bottom-nav-item` | Individual nav item (flex: 1) |
| `.bottom-nav-item.active` | Active state (primary color) |
| `.bottom-nav-item.router-link-active` | Auto-active via Vue Router |

---

## MobileSelectionFooter

Slide-up action bar for batch operations on selected items.

### Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `visible` | Boolean | `false` | Controls visibility (triggers animation) |
| `actions` | Array | `[]` | Action buttons to display |

### Action Object Structure

```typescript
interface SelectionAction {
  label: string           // Button text
  icon: string            // PrimeIcons class
  severity?: string       // PrimeVue severity ('secondary', 'danger', etc.)
  handler: () => void     // Click handler function
}
```

### Basic Usage

```vue
<template>
  <MobileSelectionFooter
    :visible="selectedItems.length > 0"
    :actions="selectionActions"
  />
</template>

<script setup>
const selectedItems = ref([])

const selectionActions = computed(() => [
  {
    label: 'Șterge',
    icon: 'pi pi-trash',
    severity: 'danger',
    handler: deleteSelected
  },
  {
    label: 'Export',
    icon: 'pi pi-download',
    severity: 'secondary',
    handler: exportSelected
  }
])

const deleteSelected = () => {
  // Delete logic
  selectedItems.value = []
}

const exportSelected = () => {
  // Export logic
}
</script>
```

### Single Action

```vue
<MobileSelectionFooter
  :visible="hasSelection"
  :actions="[
    { label: 'Confirmă Selectate', icon: 'pi pi-check', severity: 'success', handler: confirmAll }
  ]"
/>
```

### CSS Classes

| Class | Description |
|-------|-------------|
| `.mobile-selection-footer` | Base container (fixed, z-index 1030) |
| `.selection-actions` | Button container (max-width: 400px) |
| `.selection-action-btn` | Individual button (48px min-height) |

### Animation

Uses Vue `<Transition name="slide-up">`:
- Slides up from bottom when `visible` becomes `true`
- Slides down when `visible` becomes `false`
- Duration: `var(--transition-normal)` (250ms)

---

## BottomSheet

Modal-style sheet that slides up from the bottom, ideal for filters and forms.

### Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `modelValue` | Boolean | `false` | v-model for visibility |
| `closeOnOverlay` | Boolean | `true` | Close when tapping overlay |
| `closeOnSwipeDown` | Boolean | `true` | Close when swiping down on handle |

### Events

| Event | Payload | Description |
|-------|---------|-------------|
| `update:modelValue` | `boolean` | v-model update |

### Slots

| Slot | Description |
|------|-------------|
| `default` | Content inside the sheet |

### Basic Usage

```vue
<template>
  <Button label="Open Filters" @click="showFilters = true" />

  <BottomSheet v-model="showFilters">
    <h3>Filtre</h3>

    <div class="form-group">
      <label class="form-label">Status</label>
      <Dropdown v-model="filters.status" :options="statusOptions" />
    </div>

    <div class="form-group">
      <label class="form-label">Data</label>
      <Calendar v-model="filters.date" />
    </div>

    <div class="flex gap-sm mt-md">
      <Button label="Resetează" severity="secondary" @click="resetFilters" />
      <Button label="Aplică" @click="applyFilters" />
    </div>
  </BottomSheet>
</template>

<script setup>
const showFilters = ref(false)

const applyFilters = () => {
  // Apply filter logic
  showFilters.value = false
}
</script>
```

### Prevent Close on Overlay

```vue
<BottomSheet
  v-model="showImportantForm"
  :closeOnOverlay="false"
>
  <!-- User must explicitly close this -->
</BottomSheet>
```

### CSS Classes

| Class | Description |
|-------|-------------|
| `.bottom-sheet-overlay` | Full-screen overlay (50% opacity black) |
| `.bottom-sheet` | Sheet container (max-height: 90vh) |
| `.bottom-sheet-handle` | Handle area at top (32px min-height) |
| `.handle-bar` | Visual drag indicator (40px × 4px) |
| `.bottom-sheet-content` | Scrollable content area |

### Touch Gestures

| Gesture | Action |
|---------|--------|
| Tap overlay | Close (if `closeOnOverlay: true`) |
| Tap handle | Close |
| Swipe down > 100px | Close (if `closeOnSwipeDown: true`) |

---

## SwipeableCards

Touch-swipeable carousel for KPI cards with dots indicator.

### Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `totalCards` | Number | **required** | Number of cards in carousel |
| `showDots` | Boolean | `true` | Show navigation dots |
| `autoPlay` | Boolean | `false` | Auto-advance cards |
| `autoPlayInterval` | Number | `5000` | Auto-play interval (ms) |

### Events

| Event | Payload | Description |
|-------|---------|-------------|
| `update:currentIndex` | `number` | Current card index changed |

### Slots

Named slots for each card: `card-0`, `card-1`, `card-2`, etc.

### Exposed Methods

| Method | Description |
|--------|-------------|
| `goToCard(index)` | Navigate to specific card |
| `nextCard()` | Go to next card |
| `prevCard()` | Go to previous card |
| `currentIndex` | Current card index (ref) |

### Basic Usage

```vue
<template>
  <SwipeableCards :totalCards="3">
    <template #card-0>
      <div class="kpi-card">
        <div class="kpi-value">$125,430</div>
        <div class="kpi-label">Total Sales</div>
      </div>
    </template>

    <template #card-1>
      <div class="kpi-card">
        <div class="kpi-value">1,234</div>
        <div class="kpi-label">Orders</div>
      </div>
    </template>

    <template #card-2>
      <div class="kpi-card">
        <div class="kpi-value">98.5%</div>
        <div class="kpi-label">Success Rate</div>
      </div>
    </template>
  </SwipeableCards>
</template>
```

### With Auto-Play

```vue
<SwipeableCards
  :totalCards="4"
  :autoPlay="true"
  :autoPlayInterval="3000"
>
  <!-- Cards -->
</SwipeableCards>
```

### Programmatic Navigation

```vue
<template>
  <SwipeableCards ref="carousel" :totalCards="3">
    <!-- Cards -->
  </SwipeableCards>

  <Button label="Next" @click="carousel.nextCard()" />
</template>

<script setup>
const carousel = ref(null)
</script>
```

### CSS Classes

| Class | Description |
|-------|-------------|
| `.swipeable-cards-container` | Base container with overflow hidden |
| `.cards-track` | Horizontal flex container (will-change: transform) |
| `.card-slide` | Individual card (flex: 0 0 100%) |
| `.dots-indicator` | Navigation dots container |
| `.dot` | Individual dot (8px, expands to 24px when active) |
| `.dot.active` | Active dot (primary color) |

### Touch Thresholds

| Threshold | Value | Description |
|-----------|-------|-------------|
| Swipe distance | 50px | Minimum swipe to change card |
| Velocity | 0.3 | Quick swipe detection |
| Angle | 30° | Max angle for horizontal detection |

---

## Design Tokens for Mobile

### Layout Tokens

| Token | Value | Use |
|-------|-------|-----|
| `--header-height` | 56px | MobileTopBar & MobileBottomNav height |
| `--z-fixed` | 1030 | Fixed elements z-index |
| `--z-modal-backdrop` | 1040 | BottomSheet overlay |
| `--z-modal` | 1050 | BottomSheet content |

### Touch Target Sizes

```css
/* Minimum touch target: 48x48px */
.touch-target {
  min-width: 48px;
  min-height: 48px;
}

/* Button in top bar */
.top-bar-btn {
  width: 48px;
  height: 48px;
}
```

### Spacing for Mobile

| Token | Value | Mobile Use |
|-------|-------|------------|
| `var(--space-xs)` | 4px | Icon gaps, tight spacing |
| `var(--space-sm)` | 8px | Between nav items, card gaps |
| `var(--space-md)` | 16px | Card padding, content margins |
| `var(--space-lg)` | 24px | Section spacing |

### Mobile Content Padding

```css
/* Standard mobile content area */
.mobile-content {
  padding-top: 56px;    /* MobileTopBar */
  padding-bottom: 56px; /* MobileBottomNav */
  padding-left: var(--space-md);
  padding-right: var(--space-md);
}

/* When selection footer is visible */
.mobile-content-with-selection {
  padding-bottom: 80px; /* Higher for selection footer */
}
```

---

## Best Practices

### 1. Always Use Design Tokens

```css
/* ✅ CORRECT */
.mobile-card {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* ❌ WRONG */
.mobile-card {
  padding: 16px;
  border-radius: 8px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
```

### 2. Account for Fixed Headers/Footers

```vue
<template>
  <div class="view-container">
    <MobileTopBar title="My View" />

    <main class="view-content">
      <!-- Content that scrolls -->
    </main>

    <MobileBottomNav />
  </div>
</template>

<style scoped>
.view-content {
  padding-top: 56px;    /* TopBar height */
  padding-bottom: 56px; /* BottomNav height */
  min-height: 100vh;
  overflow-y: auto;
}
</style>
```

### 3. Test Both Light and Dark Mode

All mobile components support:
- Manual dark mode: `[data-theme="dark"]`
- System preference: `@media (prefers-color-scheme: dark)`

```javascript
// Toggle theme in DevTools:
document.documentElement.setAttribute('data-theme', 'dark')
```

### 4. Handle Safe Areas (Notch/Home Indicator)

```css
.mobile-bottom-nav {
  padding-bottom: env(safe-area-inset-bottom);
}

.mobile-content {
  padding-bottom: calc(56px + env(safe-area-inset-bottom));
}
```

### 5. Selection Mode Pattern

```vue
<script setup>
const selectedItems = ref([])
const isSelectionMode = computed(() => selectedItems.value.length > 0)

const toggleSelection = (item) => {
  const index = selectedItems.value.findIndex(i => i.id === item.id)
  if (index === -1) {
    selectedItems.value.push(item)
  } else {
    selectedItems.value.splice(index, 1)
  }
}

const clearSelection = () => {
  selectedItems.value = []
}
</script>
```

### 6. Combine Components for Complex Views

```vue
<template>
  <!-- Top Bar adapts to selection mode -->
  <MobileTopBar
    :title="isSelectionMode ? `${selectedCount} selectate` : 'Bonuri'"
    :showBack="isSelectionMode"
    :selectionActive="isSelectionMode"
    :actions="currentActions"
    @back-click="clearSelection"
    @action-click="handleAction"
  />

  <!-- Main Content -->
  <main class="content">
    <SwipeableCards :totalCards="kpis.length">
      <template v-for="(kpi, i) in kpis" #[`card-${i}`]>
        <KPICard :data="kpi" />
      </template>
    </SwipeableCards>

    <ItemList :items="items" @select="toggleSelection" />
  </main>

  <!-- Bottom Nav (hidden in selection mode) -->
  <MobileBottomNav v-if="!isSelectionMode" />

  <!-- Selection Footer (shown in selection mode) -->
  <MobileSelectionFooter
    :visible="isSelectionMode"
    :actions="selectionActions"
  />

  <!-- Filter Sheet -->
  <BottomSheet v-model="showFilters">
    <FilterForm @apply="applyFilters" />
  </BottomSheet>
</template>
```

---

## Troubleshooting

### Top/Bottom bars not fixed

**Problem**: Bars scroll with content.

**Solution**: Ensure `.mobile-top-bar` and `.mobile-bottom-nav` have `position: fixed`. Check for `overflow: hidden` on ancestors.

### Content hidden behind bars

**Problem**: Content is cut off at top/bottom.

**Solution**: Add padding to content area:
```css
.content {
  padding-top: 56px;
  padding-bottom: 56px;
}
```

### BottomSheet z-index issues

**Problem**: BottomSheet appears behind other elements.

**Solution**: BottomSheet uses `<Teleport to="body">` to avoid stacking context issues. Check for `z-index` wars in your CSS.

### Swipe conflicts with scrolling

**Problem**: SwipeableCards interferes with vertical scroll.

**Solution**: Component uses angle detection (30° threshold). Ensure cards have sufficient content area. Check `touch-action: pan-y` is set.

### Dark mode not working

**Problem**: Components don't respond to theme changes.

**Solution**: All components support both mechanisms:
1. Manual: `[data-theme="dark"]` on `<html>`
2. System: `@media (prefers-color-scheme: dark)`

Check that `data-theme` attribute is set correctly.

### Selection footer overlaps content

**Problem**: When selection footer appears, it covers list items.

**Solution**: Use dynamic padding:
```css
.content {
  padding-bottom: v-bind(isSelectionMode ? '96px' : '56px');
}
```

---

## Related Documentation

- [Design Tokens](./DESIGN_TOKENS.md) - Color, spacing, typography tokens
- [CSS Patterns](./CSS_PATTERNS.md) - General UI patterns
- [Onboarding CSS](./ONBOARDING_CSS.md) - Quick start for CSS

---

**Last Updated:** 2026-01-12
**Version:** 1.0.0
**Maintained By:** Frontend Team
