pull_down_button 0.8.3

A package that implements Pull-Down Button from iOS 14 in Flutter. Highly customizable.

Pull-Down Button from iOS 14 for Flutter

pull_down_button is an attempt to bring Pop-Up and Pull-Down Buttons from iOS 14+ (SwiftUI version) to Flutter with some additional customisation options.

This package only tries to visually replicate the native counterpart, some parts might be somewhat different.

Flutter availability:

Since this package uses the new Flutter feature ThemeExtension for theming, the minimum supported version is stable 3.0.0.

---

Contents:

• PullDownButton
  • PullDownMenuItem
  • PullDownMenuItem.selectable
  • PullDownMenuActionsRow
  • PullDownMenuDivider
  • PullDownMenuTitle
• showPullDownMenu
• PullDownMenu
• Theming
  • PullDownButtonTheme
• Contributions

---

PullDownButton

PullDownButton is a widget used to show the pull-down menu.

While the pull-down menu is opened, the button from where this menu was called will have lower opacity.

PullDownButton(
  itemBuilder: (context) => [
    PullDownMenuItem(
      title: 'Menu item',
      onTap: () {},
    ),
    const PullDownMenuDivider(),
    PullDownMenuItem(
      title: 'Menu item 2',
      onTap: () {},
    ),
  ],
  position: PullDownMenuPosition.under,
  buttonBuilder: (context, showMenu) => CupertinoButton(
    onPressed: showMenu,
    padding: EdgeInsets.zero,
    child: const Icon(CupertinoIcons.ellipsis_circle),
  ),
);

Properties table

Properties	Description
itemBuilder	Called when the button is pressed to create the items to show in the menu.
buttonBuilder	Builder that provides BuildContext as well as showMenu function to pass to any custom button widget.
onCanceled	Called when the user dismisses the pull-down menu.
animationBuilder	Custom animation for buttonBuilder when the pull-down menu is opening or closing
position	Whether the pull-down menu is positioned above, over, or under the pull-down menu button.
itemsOrder	Whether the pull-down menu orders its items from itemBuilder in downward or upwards way.
buttonAnchor	Whether the pull-down menu is anchored to the center, left, or right side of buttonBuilder
routeTheme	The theme of the pull-down menu box.

PullDownMenuPosition

The way PullDownButton positions its pull-down menu.

Available options:

• automatic - menu is positioned under or above an anchor depending on the side that has more space available.
• over - menu is positioned under or above an anchor depending on the side that has more space available. Also covers the button used to open the menu.

---

PullDownMenuItem

PullDownMenuItem is a widget used to create cupertino-style pull-down menu item.

PullDownMenuItem(
  title: 'Add to favourites',
  onTap: () {},
  icon: CupertinoIcons.star,
),

Properties table

Properties	Description
onTap	The action this item represents.
tapHandler	Handler to resolve how onTap callback is used.
enabled	Whether the user is permitted to tap this item.
title	Title of this PullDownMenuItem.
icon	Trailing icon of this PullDownMenuItem.
iconColor	Trailing icon's color.
iconWidget	Custom trailing widget.
isDestructive	Whether this item represents destructive action.
itemTheme	The theme of the menu item.

---

PullDownMenuItem.selectable

PullDownMenuItem.selectable is a widget used to create cupertino-style pull-down menu item with selection state.

PullDownMenuItem.selectable(
  title: 'Grid',
  selected: true,
  onTap: () {},
  icon: CupertinoIcons.square_grid_2x2,
),

Note:

Based on guidelines, if menu items contain at least one tappable menu item of type PullDownMenuItem.selectable all of PullDownMenuItems should also be of type PullDownMenuItem.selectable (to insert additional padding so all items have same). Although the manual change of all PullDownMenuItems is not needed, it is done automatically.

Properties table

PullDownMenuItem.selectable uses all of PullDownMenuItem properties as well as a boolean value selected, to indicate whether the menu item is selected or not.

---

PullDownMenuActionsRow

PullDownMenuActionsRow is a widget used to create cupertino-style pull-down menu row of actions (small or medium size).

PullDownMenuActionsRow.medium(
  items: [
    PullDownMenuItem(
      enabled: false,
      onTap: () {},
      title: 'Inbox',
      icon: CupertinoIcons.tray_arrow_down,
    ),
    PullDownMenuItem(
      onTap: () {},
      title: 'Archive',
      icon: CupertinoIcons.archivebox,
    ),
    PullDownMenuItem(
      onTap: () {},
      title: 'Trash',
      isDestructive: true,
      icon: CupertinoIcons.delete,
    ),
  ],
),

PullDownMenuItem is used to populate PullDownMenuActionsRow.items. Depending on PullDownMenuActionsRows size, PullDownMenuItem might be either icon only or icon and title in a vertical array.

Properties	Description
items	List of PullDownMenuItem.
dividerColor	Color of vertical dividers used to split items.

---

PullDownMenuDivider

PullDownMenuDivider is a widget used to create cupertino-style pull-down menu divider (small or large).

const PullDownMenuDivider(),

or to create large divider:

const PullDownMenuDivider.large(),

There is also convenient method to wrap multiple menu items with small dividers:

...PullDownMenuDivider.wrapWithDivider([
  PullDownMenuItem(
    enabled: false,
    title: 'Select',
    onTap: () {},
    icon: CupertinoIcons.checkmark_circle,
  ),
  PullDownMenuItem(
    title: 'Connect to remote server',
    onTap: () {},
    icon: CupertinoIcons.cloud_upload,
  ),
]),

---

PullDownMenuTitle

PullDownMenuTitle is a widget used to create cupertino-style pull-down menu title (usually at the top of menu).

const PullDownMenuTitle(title: Text('Menu title')),

Properties	Description
title	Title widget.
titleStyle	Title widget text style.

---

showPullDownMenu

An alternative way of displaying pull-down menu via a function call.

onPressed: () async {
  /* get tap position and / or do something before opening menu */

  await showPullDownMenu(
    context: context,
    items: [...],
    position: position,
  );
}

Properties table

Properties	Description
context	For looking up Navigator for the menu.
items	List of PullDownMenuEntry widgets.
position	The Rect is used to align the top of the menu with the top of the position rectangle.
itemsOrder	Whether the popup menu orders its items from itemBuilder in a downward or upwards way.
onCanceled	Called when the user dismisses the pull-down menu.
routeTheme	The theme of the pull-down menu box.

PullDownMenu

Another alternative way of displaying the pull-down menu as a simple widget, with no animations or adding routes to the navigation stack.

PullDownMenu(
  items: [
    PullDownMenuItem(
      title: 'Menu item',
      onTap: () {},
    ),
    const PullDownMenuDivider(),
    PullDownMenuItem(
      title: 'Menu item 2',
      onTap: () {},
    ),
  ]
)

Properties table

Properties	Description
items	List of PullDownMenuEntry widgets.
routeTheme	The theme of pull-down menu box.

---

Theming

This package also provides additional customization. By default, the iOS 16 theme is used, but it is also possible to override defaults with widget properties (see above) or with PullDownButtonTheme theme extension.

Light Theme	Dark Theme

PullDownButtonTheme

To use PullDownButtonTheme define it in your ThemeData as follows:

ThemeData(
  ...,
  extensions: [
    PullDownButtonTheme(
      routeTheme: PullDownMenuRouteTheme(
        backgroundColor: Colors.grey,
      ),
      itemTheme: PullDownMenuItemTheme(
        iconSize: 24,
      ),
      dividerTheme: PullDownMenuDividerTheme(
        dividerColor: Colors.black,
      ),
    ),
  ],
),

PullDownButtonTheme uses a set of sub-themes (for items, dividers, the menu itself, etc.) to define the needed theme. See below for every property each sub-theme provides.

PullDownButtonTheme

Properties	Description
routeTheme	Menu container theme (PullDownMenuRouteTheme).
itemTheme	PullDownMenuItem theme (PullDownMenuItemTheme).
dividerTheme	PullDownMenuDivider theme (PullDownMenuDividerTheme).
titleTheme	PullDownMenuTitle theme (PullDownMenuTitleTheme).

PullDownMenuRouteTheme

Properties	Description
backgroundColor	The background color of the pull-down menu.
borderRadius	The border radius of the pull-down menu.
beginShadow	The pull-down menu shadow at the moment of the menu being opened.
endShadow	The pull-down menu shadow at the moment the menu is fully opened.
width	Pull-down menu width.

backgroundColor usually has opacity in the range of 0.7-0.8 so that menu has a blur effect. If backgroundColor is fully opaque (opacity set to 1), no blur effect will be applied.

PullDownMenuItemTheme

Properties	Description
destructiveColor	Color for destructive action.
iconSize	Size of trailing icon.
checkmark	Checkmark icon.
checkmarkWeight	Weight of checkmark icon.
checkmarkSize	Size of checkmark icon.
textStyle	PullDownMenuItem text style.
iconActionTextStyle	PullDownMenuItem text style inside of PullDownMenuActionsRow.
onHoverColor	On hover color of PullDownMenuItem.
onHoverTextStyle	On hover text style of PullDownMenuItem.

PullDownMenuDividerTheme

Properties	Description
dividerColor	Small divider color.
largeDividerColor	Large divider color.

largeDividerColor is usually lighter than dividerColor.

PullDownMenuTitleTheme

Properties	Description
style	PullDownMenuTitle text style.

PullDownButtonInheritedTheme

If defining PullDownButtonTheme in ThemeData is not possible, for example, if you are using CupertinoApp, you can use PullDownButtonInheritedTheme:

CupertinoApp(
  builder: (context, child) => PullDownButtonInheritedTheme(
    data: const PullDownButtonTheme(
      ...
    ),
    child: child!,
  ),
  home: ...,
)

---

Here is example of using PullDownButtonTheme with Material 3 color scheme colors (generated from CupertinoColors.systemBlue with ColorScheme.fromSeed) from Material 3 Menu specs.

Custom Material 3 light theme	Custom Material 3 dark theme

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Contributions

Feel free to contribute to this project.

Please file feature requests and bugs at the issue tracker.

If you fixed a bug or implemented a feature by yourself, feel free to send a pull request.