Flutter Draggable Menu (draggable_menu)

Create custom draggable menus that provide a familiar, customizable, and user-friendly experience, inspired by popular social media platforms such as Instagram, Snapchat, Facebook, Twitter, and YouTube. Make your app look way better and more convenient with draggable_menu.

You can customize its UI, animations, and levels (thresholds) to create your own draggable menu. You can also use the pre-made UIs to create your draggable menu faster.

Features

• Easy to use
• Easy to customize
• Fully customizable UI
• Fully customizable levels that can be used to create an expandable draggable menu
• Controllable with its controller
• Compatible with the scrollable usage
• Supports fast-drag gestures
• Has multiple listeners to listen to its values
• You can use it without any configurations
• Contains pre-build UIs and route
• Smooth scrolling feature
• and more...

If you like this package, you can support it by giving a star on GitHub and a like on pub.dev.

Classic UI	Soft Modern UI (with Scrollable)	Modular UI (with Status)

Navigation

• Getting Started
  • Create a Draggable Menu
  • Open the Draggable Menu
• Parameters of DraggableMenu
• How To Use
  • Create a Draggable Menu and Open it
  • How to Close
  • Use the Levels (Expandable Draggable Menu)
  • Use Different UIs or Edit The Current UI (eg. Change its color etc.)
  • Using Scrollables
  • Using Status Listener
  • Using Value Listener
  • Create your custom UI
  • Using Controller

Note: You can find more examples in the Draggable Menu Example app.

Getting Started

Let's teach you how to create, open and close the DraggableMenu.

Create a Draggable Menu

Create a Draggable Menu widget and pass your child to its child parameter.

DraggableMenu(
  child: child,
)

Open the Draggable Menu

Open the menu by calling Draggable Menu's static open method.

DraggableMenu.open(
  context,
  DraggableMenu(
    child: child,
  ),
)

You can use the Draggable Menu inside of another widget, and give it to the open method. Like this:

DraggableMenu.open(
  context,
  MyCustomDraggableMenu(),
)

Note: The DraggableMenu.open() needs a Navigator to push the Menu.

If you want to close the menu programmatically close it by calling the Navigator's pop method.

Navigator.pop(context);

And before you go, you might want to change it's color or other parameters about the DraggableMenu's UI. To configure them check the Use Different UIs or Edit The Current UI section.

Parameters of DraggableMenu

Category	Parameters	Description
Usage	bool allowToShrink	If it is true, the widget will be at its minimum height. By default, it is false.
Usage	List<DraggableMenuLevel>? levels	This is the parameter to use the expand feature and to define a level. If you want a fixed height for the Level 0, provide a Level as well. Provide DraggableMenuLevel objects inside of it to create a level and customize its height. The lowest object you pass will be Level 0 of the Draggable Menu's level. You must provide at least two levels to use the expand feature. By default, Level 0's height is 240 (Unlike the DraggableMenuLevels, your widget's height can pass this value.).
Usage	double closeThreshold	Specifies the Close Threshold of the Draggable Menu. Takes a value between 0 and 1. By default, it is 0.5.
Usage	double expandThreshold	Specifies the Expand Threshold of the Draggable Menu. Takes a value between 0 and 1. By default, it is 1 / 3.
Usage	double minimizeThreshold	Specifies the Minimize Threshold of the Draggable Menu. Takes a value between 0 and 1. By default, it is 1 / 3.
Usage	double? fixedCloseThreshold	Specifies the Close Threshold of the Draggable Menu by giving it a fixed value.
Usage	double? fixedExpandThreshold	Specifies the Expand Threshold of the Draggable Menu by giving it a fixed value.
Usage	double? fixedMinimizeThreshold	Specifies the Minimize Threshold of the Draggable Menu by giving it a fixed value.
Usage	bool blockMenuClosing	It specifies whether the Draggable Menu can close itself by dragging down and taping outside of the Menu or not. By default, it is false.
Usage	bool fastDrag	It specifies whether the Draggable Menu will run fast drag gestures when fast-dragged. By default, it is true.
Usage	double fastDragVelocity	Specifies the Fast Drag Velocity of the Draggable Menu. That means it defines how many velocities will be the threshold to run fast-drag gestures. Takes a value above 0. If the value is negative, it will throw an error. By default, it is 1500.
Usage	bool fastDragClose	It specifies whether the Draggable Menu will close itself when it has been fast-dragged. By default, it is true.
Usage	bool fastDragMinimize	It specifies whether the Draggable Menu will minimize itself when it has been fast-dragged and it's expanded. By default, it is true.
Usage	bool fastDragExpand	It specifies whether the Draggable Menu will expand when it has been fast-dragged and can be expandable. By default, it is true.
Usage	bool minimizeBeforeFastDrag	It specifies whether the Draggable Menu will be minimized when it has been dragged too fast or not when it's expanded. By default, it is false.
Usage	int startLevel	Defines the level at which the menu will start. By default, it is 0.
UI	(required) Widget child	Adds a child inside the Draggable Menu's UI.
UI	CustomDraggableMenu ui	Overrides the Classic Draggable Menu UI. By default, it is ClassicDraggableMenu().
UI	Widget? customUi	Overrides the Draggable Menu's UI and uses the given widget. If used, the child parameter of the DraggableMenu widget won't work.
Listener	Function(DraggableMenuStatus status, int level)? addStatusListener	Adds a listener to listen to its Status.
Listener	Function(double menuValue, double raw, double levelValue)? addValueListener	Adds a listener to listen to its Menu Value.
Animation	Duration animationDuration	Specifies the duration of the Draggable Menu's animations. By default, it is Duration(milliseconds: 320).
Animation	Curve curve	Specifies the curve of the Draggable Menu's animations. By default, it is Curves.ease.
Controller	DraggableMenuController? controller	Provide the DraggableMenuController to the controller parameter to control the DraggableMenu widget.

How To Use

Create a Draggable Menu and Open it

You can create a Draggable Menu by just using this:

DraggableMenu(
  child: child,
)

After that, you will probably want to push the Draggable Menu to the screen. To do that, use Navigator's methods (e.g. push) or the Draggable Menu's open or openReplacement methods. They are the same with just a little difference. The openReplacement method replaces the previous root (e.g. Navigator.pushReplacement).

DraggableMenu.open(
  context,
  DraggableMenu(
    child: child,
  ),
  barrier: barrier, // Optional. If it's true use a root with a barrier.
  barrierColor: barrierColor, // Optional. Changes the barrier's color.
  animationDuration: animationDuration, // Optional. Specifies its animation's duration.
  curve: animationDuration, // Optional. Specifies its animation's curve.
)

You can make it return a value. Do it in the same way you do it with the Navigator's push method.

final returnValue = await DraggableMenu.open<T>(
  context,
  DraggableMenu(
    child: child,
  ),
);

or do it using Future instead of using async

DraggableMenu.open<T>(
  context,
  DraggableMenu(
    child: child,
  ),
).then((value) => null); // Add something to do 

---

How to Close

If you want to close the menu programmatically close it by calling the Navigator's pop method.

Navigator.pop(context);

You can also return a value with it.

Navigator.pop<T>(context, value);

---

Use the Levels (Expandable Draggable Menu)

You can use the expand feature of the DraggableMenu by defining levels.

To do that. First, create levels by providing DraggableMenuLevels to the levels parameter and define their heights.

The lowest object you pass will be Level 0 of the Draggable Menu's level. So you must provide at least two levels to use the expand feature.

DraggableMenu(
  levels: [
    DraggableMenuLevel(height: height),
    DraggableMenuLevel.ratio(ratio: ratio),
  ],
  child: child,
)

You can set Level 0's height (The DraggableMenu's default height) by creating a level. By default, Level 0's height is 240 (Unlike the DraggableMenuLevels, your widget's height can pass this value.).

You can use DraggableMenuLevel.ratio() to define the level's height with ratio. The ratio parameter can only take a value between 0 and 1.

You can create as many levels as you want. But the levels that have same height will count as one level. And the levels that you provided are sorted from smallest to largest.

---

Use Different UIs or Edit The Current UI (eg. Change its color etc.)

You can use different UIs rather than the default one. You can use pre-made UIs or create your own UI.

For creating your own UI, check out the Create your custom UI section at the end of this file. If you don't want to create your own UI, you can use one of the pre-made UIs.

Choose one of the pre-made UIs and pass it to the ui parameter of the DraggableMenu widget.

Pre-Made UIs:

• ClassicDraggableMenu
• ModernDraggableMenu
• SoftModernDraggableMenu
• ModularDraggableMenu

You can change the UIs' colors by using their parameters.

DraggableMenu(
  ui: SoftModernDraggableMenu(
    color: color, // Changes the UI's (Draggable Menu's) background color.
  );
  child: child,
)

---

Using Scrollables

While using scrollable with a Draggable Menu you need to add the ScrollableManager widget above the scrollable you want to control Draggable with and set the physics of the Scrollable (e.g. ListView) to NeverScrollableScrollPhysics. The ScrollableManager widget must be under a DraggableMenu widget. You can do it by just simply using your widgets under its child or ui parameters.

DraggableMenu(
  child: ScrollableManager(
    child: ListView(
      physics: const NeverScrollableScrollPhysics(),
    ), // You can use any scrollable widget
  ),
)

Use the ScrollableManager widget with one scrollable widget under it. If you want to control the Draggable Menu with multiple Scrollables, use the ScrollableManager widget above each scrollable you want to control the Draggable Menu with.

Do not give a ScrollController to the scrollable widget under the ScrollableManager widget. If you want to use ScrollController, use the ScrollController under the ScrollableManager widget's controller parameter instead.

DraggableMenu(
  child: ScrollableManager(
    controller: ScrollController(), // Use the scroll controller here
    child: ListView(
      // Do not use the scroll controller here
      physics: const NeverScrollableScrollPhysics(),
    ), // You can use any scrollable widget
  ),
)

In short, do not forget to use ScrollableManager and set the physics of the scrollable you want to NeverScrollableScrollPhysics.

Extra: Check out the ScrollableManager's enableExpandedScroll and smoothScrolling parameters.

---

Using Status Listener

Use the addStatusListener parameter to listen to the Draggable Menu's status.

Dragable Menu's status are:

• Closing
• Will Close
• May Close
• Canceling
• Minimized
• Minimizing
• May Expand
• Will Expand
• Will Minimize
• May Minimize
• Expanding
• Expanded

You can point them out with DraggableMenuStatus like:

DraggableMenu(
  addStatusListener: (status, level) {
    if (status == DraggableMenuStatus.mayExpand) {
      // Add something to do when its status is mayExpand
    }
    // Add something to do when its status change
  }
  child: child,
)

---

Using Value Listener

Use the addValueListener parameter to listen to the Draggable Menu's Menu Value.

It takes a double value between -1 and 1.

DraggableMenu(
  addValueListener: (menuValue, raw, levelValue) {
    // Add something to do when its value change
  }
  child: child,
)

The menuValue value takes a value between -1 and 1.

The levelValue value takes a value between -1 and ∞.

For the menuValue value:

• The 1 value stands for the Menu's expanded position.
• The 0 value stands for the Menu's minimized position.
• The -1 value stands for the Menu's closed position.

For the levelValue value:

• The whole numbers stand for the DraggableMenu's levels. (For example, the 3 value stands for the Level 3.)
• The -1 value stands for the Menu's closed position.

---

Create your custom UI

Create your own Draggable Menu UIs using the ui parameter of the DraggableMenu. The ui parameter allows you to override the DraggableMenu's Classic Ui.

First, create a class that extends the CustomDraggableMenu class and override its buildUi method. After that, pass it to the ui parameter.

class YourDraggableMenuUi extends CustomDraggableMenu {
  @override
  Widget buildUi(
    BuildContext context,
    Widget child,
    DraggableMenuStatus status,
    int level,
    double menuValue,
    double? raw,
    double levelValue,
    Duration animationDuration,
    Curve curve,
  ) {
    // Return Your Ui
    return YourUi(
      child: child, // Pass the `child` value to use the child passed the `DraggableMenu` widget.
    );
  }
}

DraggableMenu(
  ui: ui, // Pass the class you created
  child: child,
)

Or you can use pre-made UIs instead of creating from scratch.

Pre-Made UIs:

• ClassicDraggableMenu
• ModernDraggableMenu
• SoftModernDraggableMenu
• ModularDraggableMenu

Note: You can change some features of the pre-made UIs by using their parameters.

DraggableMenu(
  ui: SoftModernDraggableMenu( // Pass your ui to the ui parameter
    radius: 32, // Changes radius
  );
  child: child,
)

You can use the customUi parameter as well. But it won't let you use the child that passed to the DraggableMenu widget. Its advantage is it is easy to use, therefore you can change the ui faster than creating with CustomDraggableMenu. Just give a widget, and override the DraggableMenu's UI.

DraggableMenu(
  customUi: yourUi;
  child: child, // That won't work. Add your item inside of the customUi instead.
)

CustomDraggableMenu has a getter called expandable. You can override it to enable the expansion of the DraggableMenu UI. By default, it is set to true. Please note that even if the expandable parameter is set to false, the DraggableMenu widget will still accept as many levels as specified, but only the lowest level will function as expected.

---

Using Controller

You can use DraggableMenuController to control the DraggableMenu widget.

Provide the DraggableMenuController to the controller parameter of the DraggableMenu.

DraggableMenu(
  controller: _controller; // Provide the DraggableMenuController here
  child: child,
)

And use one of the methods of the DraggableMenuController to control the DraggableMenu widget. For example:

onTap: () => _controller.animateTo(1);

Methods:

• animateTo() - Animates to given level.

---

Note: You can find more examples in the Draggable Menu Example app.

For more info, check out the GitHub Repository.