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| 1 | +import { Meta, Canvas, Story, Controls } from '@storybook/blocks'; |
| 2 | +import { FilterPicker } from './FilterPicker'; |
| 3 | +import * as FilterPickerStories from './FilterPicker.stories'; |
| 4 | + |
| 5 | +<Meta of={FilterPickerStories} /> |
| 6 | + |
| 7 | +# FilterPicker |
| 8 | + |
| 9 | +FilterPicker is a versatile selection component that combines a trigger button with a filterable dropdown. It provides a searchable interface for selecting one or multiple items from a list, with support for sections, custom summaries, and various UI states. |
| 10 | + |
| 11 | +## When to Use |
| 12 | + |
| 13 | +- Creating filter interfaces where users need to select from predefined options |
| 14 | +- Building advanced search and filtering systems with multiple criteria |
| 15 | +- Implementing tag-based selection systems where users can choose multiple categories |
| 16 | +- Designing compact selection interfaces where space is limited and search functionality is important |
| 17 | +- Building user preference panels where options need to be organized into logical groups |
| 18 | + |
| 19 | +## Component |
| 20 | + |
| 21 | +<Story of={FilterPickerStories.Default} /> |
| 22 | + |
| 23 | +--- |
| 24 | + |
| 25 | +### Properties |
| 26 | + |
| 27 | +<Controls of={FilterPickerStories.Default} /> |
| 28 | + |
| 29 | +### Base Properties |
| 30 | + |
| 31 | +Supports [Base properties](/BaseProperties) |
| 32 | + |
| 33 | +### Styling Properties |
| 34 | + |
| 35 | +#### styles |
| 36 | + |
| 37 | +Customizes the root element of the component. |
| 38 | + |
| 39 | +**Sub-elements:** |
| 40 | +- None - styles apply directly to the trigger button wrapper |
| 41 | + |
| 42 | +#### listBoxStyles |
| 43 | + |
| 44 | +Customizes the dropdown list container within the popover. |
| 45 | + |
| 46 | +#### popoverStyles |
| 47 | + |
| 48 | +Customizes the popover dialog that contains the list. |
| 49 | + |
| 50 | +#### headerStyles |
| 51 | + |
| 52 | +Customizes the header area when header prop is provided. |
| 53 | + |
| 54 | +#### footerStyles |
| 55 | + |
| 56 | +Customizes the footer area when footer prop is provided. |
| 57 | + |
| 58 | +### Style Properties |
| 59 | + |
| 60 | +These properties allow direct style application without using the `styles` prop: `width`, `height`, `margin`, `padding`, `position`, `inset`, `zIndex`, `gridArea`, `order`, `gridColumn`, `gridRow`, `placeSelf`, `alignSelf`, `justifySelf`, `opacity`, `color`, `fill`, `fade`. |
| 61 | + |
| 62 | +### Modifiers |
| 63 | + |
| 64 | +The `mods` property accepts the following modifiers you can override: |
| 65 | + |
| 66 | +| Modifier | Type | Description | |
| 67 | +|----------|------|-------------| |
| 68 | +| placeholder | `boolean` | Applied when no selection is made | |
| 69 | +| selected | `boolean` | Applied when items are selected | |
| 70 | +| disabled | `boolean` | Applied when the component is disabled | |
| 71 | +| loading | `boolean` | Applied when the component is in loading state | |
| 72 | +| invalid | `boolean` | Applied when validation state is invalid | |
| 73 | +| valid | `boolean` | Applied when validation state is valid | |
| 74 | +| focused | `boolean` | Applied when the component has focus | |
| 75 | + |
| 76 | +## Variants |
| 77 | + |
| 78 | +### Types |
| 79 | + |
| 80 | +- `outline` - Default outlined button appearance |
| 81 | +- `clear` - Transparent background with minimal styling |
| 82 | +- `primary` - Primary brand color styling |
| 83 | +- `secondary` - Secondary color styling |
| 84 | +- `neutral` - Neutral gray styling |
| 85 | + |
| 86 | +### Themes |
| 87 | + |
| 88 | +- `default` - Standard appearance |
| 89 | +- `danger` - Used when validationState is invalid |
| 90 | + |
| 91 | +### Sizes |
| 92 | + |
| 93 | +- `small` - Compact size for dense interfaces |
| 94 | +- `medium` - Default size |
| 95 | +- `large` - Emphasized size for prominent selections |
| 96 | + |
| 97 | +## Examples |
| 98 | + |
| 99 | +### Basic Usage |
| 100 | + |
| 101 | +```jsx |
| 102 | +<FilterPicker label="Select Fruits" placeholder="Choose fruits..."> |
| 103 | + <FilterPicker.Item key="apple">Apple</FilterPicker.Item> |
| 104 | + <FilterPicker.Item key="banana">Banana</FilterPicker.Item> |
| 105 | + <FilterPicker.Item key="cherry">Cherry</FilterPicker.Item> |
| 106 | +</FilterPicker> |
| 107 | +``` |
| 108 | + |
| 109 | +### Multiple Selection |
| 110 | + |
| 111 | +```jsx |
| 112 | +<FilterPicker |
| 113 | + label="Select Multiple Options" |
| 114 | + selectionMode="multiple" |
| 115 | + placeholder="Choose items..." |
| 116 | +> |
| 117 | + <FilterPicker.Item key="option1">Option 1</FilterPicker.Item> |
| 118 | + <FilterPicker.Item key="option2">Option 2</FilterPicker.Item> |
| 119 | + <FilterPicker.Item key="option3">Option 3</FilterPicker.Item> |
| 120 | +</FilterPicker> |
| 121 | +``` |
| 122 | + |
| 123 | +### With Sections |
| 124 | + |
| 125 | +```jsx |
| 126 | +<FilterPicker |
| 127 | + label="Categorized Options" |
| 128 | + selectionMode="multiple" |
| 129 | + placeholder="Select from categories..." |
| 130 | +> |
| 131 | + <FilterPicker.Section title="Fruits"> |
| 132 | + <FilterPicker.Item key="apple">Apple</FilterPicker.Item> |
| 133 | + <FilterPicker.Item key="banana">Banana</FilterPicker.Item> |
| 134 | + </FilterPicker.Section> |
| 135 | + <FilterPicker.Section title="Vegetables"> |
| 136 | + <FilterPicker.Item key="carrot">Carrot</FilterPicker.Item> |
| 137 | + <FilterPicker.Item key="broccoli">Broccoli</FilterPicker.Item> |
| 138 | + </FilterPicker.Section> |
| 139 | +</FilterPicker> |
| 140 | +``` |
| 141 | + |
| 142 | +### With Checkboxes |
| 143 | + |
| 144 | +```jsx |
| 145 | +<FilterPicker |
| 146 | + label="Multi-select with Checkboxes" |
| 147 | + selectionMode="multiple" |
| 148 | + isCheckable={true} |
| 149 | + placeholder="Select options..." |
| 150 | +> |
| 151 | + <FilterPicker.Item key="option1">Option 1</FilterPicker.Item> |
| 152 | + <FilterPicker.Item key="option2">Option 2</FilterPicker.Item> |
| 153 | + <FilterPicker.Item key="option3">Option 3</FilterPicker.Item> |
| 154 | +</FilterPicker> |
| 155 | +``` |
| 156 | + |
| 157 | +### Custom Summary Display |
| 158 | + |
| 159 | +```jsx |
| 160 | +<FilterPicker |
| 161 | + label="Custom Summary" |
| 162 | + selectionMode="multiple" |
| 163 | + placeholder="Choose items..." |
| 164 | + renderSummary={({ selectedKeys, selectedLabels }) => { |
| 165 | + if (selectedKeys.length === 0) return null; |
| 166 | + if (selectedKeys.length === 1) return selectedLabels[0]; |
| 167 | + return `${selectedKeys.length} items selected`; |
| 168 | + }} |
| 169 | +> |
| 170 | + <FilterPicker.Item key="item1">Item 1</FilterPicker.Item> |
| 171 | + <FilterPicker.Item key="item2">Item 2</FilterPicker.Item> |
| 172 | + <FilterPicker.Item key="item3">Item 3</FilterPicker.Item> |
| 173 | +</FilterPicker> |
| 174 | +``` |
| 175 | + |
| 176 | +### With Header and Footer |
| 177 | + |
| 178 | +```jsx |
| 179 | +<FilterPicker |
| 180 | + label="Advanced Options" |
| 181 | + placeholder="Filter options..." |
| 182 | + header={ |
| 183 | + <div> |
| 184 | + <h4>Filter Options</h4> |
| 185 | + <Badge>12 available</Badge> |
| 186 | + </div> |
| 187 | + } |
| 188 | + footer={ |
| 189 | + <div> |
| 190 | + <Text>Select multiple to combine filters</Text> |
| 191 | + <Button type="link" size="small">Reset all</Button> |
| 192 | + </div> |
| 193 | + } |
| 194 | +> |
| 195 | + <FilterPicker.Item key="filter1">Active Items</FilterPicker.Item> |
| 196 | + <FilterPicker.Item key="filter2">Recent Items</FilterPicker.Item> |
| 197 | + <FilterPicker.Item key="filter3">Archived Items</FilterPicker.Item> |
| 198 | +</FilterPicker> |
| 199 | +``` |
| 200 | + |
| 201 | +### Icon-Only Filter Button |
| 202 | + |
| 203 | +```jsx |
| 204 | +<FilterPicker |
| 205 | + selectionMode="multiple" |
| 206 | + renderSummary={false} |
| 207 | + icon={<FilterIcon />} |
| 208 | + aria-label="Apply filters" |
| 209 | +> |
| 210 | + <FilterPicker.Item key="filter1">Recent</FilterPicker.Item> |
| 211 | + <FilterPicker.Item key="filter2">Popular</FilterPicker.Item> |
| 212 | + <FilterPicker.Item key="filter3">Favorites</FilterPicker.Item> |
| 213 | +</FilterPicker> |
| 214 | +``` |
| 215 | + |
| 216 | +### Controlled Component |
| 217 | + |
| 218 | +```jsx |
| 219 | +function ControlledFilterPicker() { |
| 220 | + const [selectedKeys, setSelectedKeys] = useState(['apple', 'banana']); |
| 221 | + |
| 222 | + return ( |
| 223 | + <FilterPicker |
| 224 | + label="Controlled Selection" |
| 225 | + selectionMode="multiple" |
| 226 | + selectedKeys={selectedKeys} |
| 227 | + onSelectionChange={setSelectedKeys} |
| 228 | + > |
| 229 | + <FilterPicker.Item key="apple">Apple</FilterPicker.Item> |
| 230 | + <FilterPicker.Item key="banana">Banana</FilterPicker.Item> |
| 231 | + <FilterPicker.Item key="cherry">Cherry</FilterPicker.Item> |
| 232 | + </FilterPicker> |
| 233 | + ); |
| 234 | +} |
| 235 | +``` |
| 236 | + |
| 237 | +## Accessibility |
| 238 | + |
| 239 | +### Keyboard Navigation |
| 240 | + |
| 241 | +- `Tab` - Moves focus to the FilterPicker trigger |
| 242 | +- `Space/Enter` - Opens the dropdown when trigger is focused |
| 243 | +- `Arrow Up/Down` - Navigates between options in the search input |
| 244 | +- `Enter` - Selects the focused option |
| 245 | +- `Space` - Toggles selection (when search input is empty) |
| 246 | +- `Escape` - Closes the dropdown or clears search text |
| 247 | + |
| 248 | +### Screen Reader Support |
| 249 | + |
| 250 | +- Component announces as "button" with appropriate expanded state |
| 251 | +- Search input is properly labeled as "combobox" with aria-activedescendant |
| 252 | +- Selection changes are announced with current selection count |
| 253 | +- Options announce their selected state and text content |
| 254 | +- Sections are properly grouped and announced |
| 255 | + |
| 256 | +### ARIA Properties |
| 257 | + |
| 258 | +- `aria-label` - Provides accessible label for the trigger button when no visible label exists |
| 259 | +- `aria-expanded` - Indicates whether the dropdown is open |
| 260 | +- `aria-haspopup` - Indicates the trigger opens a listbox |
| 261 | +- `aria-activedescendant` - Points to the currently focused option in search mode |
| 262 | + |
| 263 | +## Best Practices |
| 264 | + |
| 265 | +1. **Do**: Provide clear, descriptive labels for options |
| 266 | + ```jsx |
| 267 | + <FilterPicker label="Filter by Category"> |
| 268 | + <FilterPicker.Item key="electronics">Electronics & Gadgets</FilterPicker.Item> |
| 269 | + <FilterPicker.Item key="clothing">Clothing & Accessories</FilterPicker.Item> |
| 270 | + </FilterPicker> |
| 271 | + ``` |
| 272 | + |
| 273 | +2. **Don't**: Use overly long option texts that will be truncated |
| 274 | + ```jsx |
| 275 | + // Avoid this |
| 276 | + <FilterPicker.Item key="long"> |
| 277 | + This is an extremely long option text that will be truncated and hard to read |
| 278 | + </FilterPicker.Item> |
| 279 | + ``` |
| 280 | + |
| 281 | +3. **Accessibility**: Always provide meaningful labels and use sections for logical grouping |
| 282 | +4. **Performance**: Use `textValue` prop for options with complex content to ensure proper searching |
| 283 | +5. **UX**: Consider using `isCheckable` for multiple selection to make selection state more obvious |
| 284 | + |
| 285 | +## Integration with Forms |
| 286 | + |
| 287 | +This component supports all [Field properties](/field-properties.md) when used within a Form. The component automatically handles form validation, field states, and integrates with form submission. |
| 288 | + |
| 289 | +## Suggested Improvements |
| 290 | + |
| 291 | +- Enhanced keyboard shortcuts: Add support for typing to jump to options |
| 292 | +- Async data loading: Built-in support for loading options dynamically |
| 293 | +- Virtualization: Support for rendering large lists efficiently |
| 294 | +- Custom filter functions: More sophisticated filtering options beyond text matching |
| 295 | +- Batch operations: Support for "select all" and "clear all" actions in multiple selection mode |
| 296 | + |
| 297 | +## Related Components |
| 298 | + |
| 299 | +- [FilterListBox](/docs/forms-filterlistbox--docs) - The underlying searchable list component |
| 300 | +- [Select](/docs/forms-select--docs) - Use for simple selection without search functionality |
| 301 | +- [ComboBox](/docs/forms-combobox--docs) - Use when users need to enter custom values |
| 302 | +- [ListBox](/docs/forms-listbox--docs) - Use for basic list selection without search |
| 303 | +- [Button](/docs/actions-button--docs) - The underlying trigger component |
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