elk_icon_picker

A themeable Flutter picker for Lucide icons, usable inline or as a bottom sheet, with search and category tabs. The icons come from elk_stroke_icons, which draws them with CustomPainter (no fonts or SVG assets). It is re-exported, so one import gives you both.

Unofficial. Not affiliated with or endorsed by the Lucide project.

   

Features

• 📦 Minimal Dependencies: Only depends on its sibling package elk_stroke_icons. No flutter_svg, icon fonts, or other third-party packages.
• 🎨 Fully Customizable: Control colors, sizes, stroke widths, rounded caps/joins, and fonts — globally via ThemeData or per-widget.
• 🔍 Searchable: Built-in fuzzy search and categorized icon browsing.
• 📱 Adaptive UI: Works beautifully as an inline widget or a professional bottom sheet.

Getting Started

Add elk_icon_picker to your pubspec.yaml:

dependencies:
  elk_icon_picker: ^0.2.0

Usage

Show as a Modal Sheet

The quickest way to integrate the picker is using the showElkIconPicker helper function.

import 'package:elk_icon_picker/elk_icon_picker.dart';

void _selectIcon() async {
  final selection = await showElkIconPicker(
    context,
    currentSelection: _mySelection,
    selectedColor: Theme.of(context).primaryColor,
  );

  if (selection is LucideIconSelection) {
    setState(() {
      _mySelection = selection;
    });
  }
}

Use Inline Widget

You can also embed the ElkIconPicker directly into your layouts.

ElkIconPicker(
  onSelected: (selection) {
    print('Selected: ${selection.name}');
  },
  crossAxisCount: 6,
  borderRadius: 12.0,
)

Displaying the Selected Icon

Use the LucideIcon widget (from elk_stroke_icons, re-exported here) to render the selected icon data. If you only need to show icons, without the picker, depend on elk_stroke_icons directly.

LucideIcon(
  LucideIcons.house,
  size: 32,
  color: Colors.blue,
  strokeWidth: 2.5,
)

Property	Description	Default
data	Required. The icon data to render (e.g., LucideIcons.house)	-
size	The size of the icon	24
color	The color of the icon's stroke	IconTheme.of(context).color
strokeWidth	The width of the icon's stroke	2.0
rounded	Whether to use rounded stroke caps and joins	true

Saving and Restoring a Selection

Store the icon's name (e.g. 'circle-check') and look it up again with IconSearchService.findByName. Lucide occasionally renames icons upstream; old names (e.g. 'smile', now 'face-slightly-smiling') still resolve via kLucideIconAliases, so saved data keeps working after an icon set update.

final savedName = selection.data.name; // store this string

final icon = IconSearchService.findByName(savedName) ?? LucideIcons.circleQuestionMark;

Renamed icons also keep deprecated constants (e.g. LucideIcons.smile), so existing code still compiles and the analyzer points you at the new name.

Theming

You can style all pickers in one place by adding ElkIconPickerThemeData to your app's ThemeData.extensions. This integrates naturally with Material 3 light/dark themes — just provide a different extension in your dark theme.

MaterialApp(
  theme: ThemeData(
    colorScheme: ColorScheme.fromSeed(seedColor: Colors.teal),
    extensions: [
      ElkIconPickerThemeData(
        selectedColor: Colors.teal,
        backgroundColor: Colors.white,
        iconColor: Colors.black54,
        borderRadius: 12.0,
        searchStyle: TextStyle(fontFamily: 'Inter'),
        searchHintStyle: TextStyle(fontFamily: 'Inter', color: Colors.grey),
        tabLabelStyle: TextStyle(fontFamily: 'Inter', fontWeight: FontWeight.w600),
        titleStyle: TextStyle(fontFamily: 'Inter', fontSize: 18, fontWeight: FontWeight.bold),
        emptyStateStyle: TextStyle(fontFamily: 'Inter', color: Colors.grey),
      ),
    ],
  ),
  darkTheme: ThemeData.dark(useMaterial3: true).copyWith(
    extensions: [
      ElkIconPickerThemeData(
        selectedColor: Colors.tealAccent,
        backgroundColor: Color(0xFF1E1E1E),
        iconColor: Colors.white70,
      ),
    ],
  ),
)

Values are resolved in this priority order:

1. Explicit constructor param — highest priority, overrides everything
2. ElkIconPickerThemeData extension — global app theme
3. Material 3 ColorScheme / TextTheme — automatic fallback

So you can set defaults globally and still override individual pickers when needed:

// Uses the global theme
showElkIconPicker(context);

// Overrides just the selected color for this instance
showElkIconPicker(context, selectedColor: Colors.orange);

ElkIconPickerThemeData properties

Property	Description
backgroundColor	Background color of the picker and bottom sheet container
iconColor	Color for unselected icons
selectedColor	Color for the selected icon highlight
selectedIconColor	Color of the icon stroke itself when selected
iconSize	Rendered size of each icon in the grid (default 24.0)
borderRadius	Corner radius for selection indicators and the sheet
searchStyle	Text style for the search field input
searchHintStyle	Text style for the search field hint text
tabLabelStyle	Text style for category tab labels
titleStyle	Text style for the bottom sheet title ("Select Icon")
emptyStateStyle	Text style for the "no results" message
iconStrokeWidth	Stroke width for icon rendering (e.g. 1.5 for thin, 2.5 for bold)
iconRounded	Whether icons use rounded stroke caps and joins
showSearch	Whether the search bar is shown by default
showCategories	Whether category tabs are shown by default
categoryStyle	Default category tab layout style (both, iconsOnly, textOnly)
allowUserToggleCategories	Whether to show the toggle button for categories
crossAxisCount	Global override for the number of columns (default: adaptive)
allowedCategoryIds	Global filter for which categories to show
categoryIconSize	Rendered size of icons in the category tab bar (default 18.0)
categoryTextSpacing	Spacing between icon and text in tabs (default 8.0)
gridPadding	Padding around the main icon grid (default EdgeInsets.all(16.0))
searchBarFillColor	Fill color of the search input field
sheetHandleColor	Color of the drag handle in the bottom sheet
sheetTitleBarColor	Background color of the title bar area in the sheet
tabIndicatorColor	Color of the selected tab underline/indicator
categoryTabWidth	Fixed width for each category tab — controls how many are visible at once
showCategoryFade	Show gradient fade at the edges of the tab bar when more tabs exist (default true)
categoryFadeColor	Color of the tab bar edge fade (defaults to the picker's background color)
swipeCategoryOnGrid	Allow horizontal swipes on the icon grid to change category (default true)
swipeVelocityThreshold	Minimum swipe velocity (px/s) to trigger a category change (default 300.0)

Category navigation

Edge fade

When the category tab bar has more tabs than fit in the viewport, gradient overlays appear at the left and/or right edges to signal that the bar is scrollable. The fade color automatically matches the picker background, so it blends seamlessly. Set showCategoryFade: false to disable it, or categoryFadeColor to override the color.

Controlling visible tab count

Use categoryTabWidth to give all tabs a fixed width. For example, setting categoryTabWidth: 110 on a 360dp-wide picker shows approximately three tabs at a time. Leave it null (the default) for natural intrinsic widths.

Swipe to change category

By default, a fast horizontal swipe anywhere on the icon grid advances or retreats the active category — the same gesture that a tab bar swipe would produce. Flutter's gesture arena handles the disambiguation: vertical scrolling of the grid and horizontal category switching work without conflict. Use swipeCategoryOnGrid: false to disable, or swipeVelocityThreshold to tune the sensitivity.

Customization

Per-widget constructor params work exactly as before. These take priority over any theme extension.

Property	Description	Default
onSelected	Required. Callback when an icon is selected	-
currentSelection	The currently selected icon to highlight	null
crossAxisCount	Number of columns in the grid	from theme / adaptive
iconColor	Color for unselected icons	from theme
selectedColor	Color for the selected icon/indicator highlight	from theme
selectedIconColor	Color of the icon stroke itself when selected	from theme
backgroundColor	Background color of the picker	from theme
borderRadius	Curvature of selection boxes	from theme
iconStrokeWidth	Stroke width for icon rendering	from theme
iconRounded	Rounded stroke caps/joins on icons	from theme
iconSize	Size of icons in the grid	from theme
searchBarFillColor	Background color for the search bar	from theme
tabIndicatorColor	Color of the category tab indicator	from theme
showSearch	Whether to show the search bar	from theme
showCategories	Whether to show the category tabs	from theme
categoryStyle	Tab layout: both, iconsOnly, or textOnly	from theme
allowedCategoryIds	Limit which categories appear	from theme
allowUserToggleCategories	Show a user toggle for categories	from theme
categoryIconSize	Size of icons in the category tabs	from theme
categoryTextSpacing	Gap between icon and text in tabs	from theme
gridPadding	Padding around the icon grid	from theme
scrollController	Controller for the icon grid scroll	null
categoryTabWidth	Fixed width for each category tab	from theme
showCategoryFade	Show gradient fade at the tab bar edges	from theme (true)
categoryFadeColor	Color of the tab bar edge fade	from theme / bg
swipeCategoryOnGrid	Horizontal swipe on grid changes category	from theme (true)
swipeVelocityThreshold	Min swipe velocity to trigger category change	from theme (300.0)

License

• The picker code is licensed under the MIT License.
• Lucide icon data ships in elk_stroke_icons under the ISC License.