Flutter Draggable Menu (draggable_menu) #

With draggable_menu, create Draggable Menus as you want and make your app look way better and more convenient.

Create Draggable Menus like some popular apps like Instagram, Snapchat, Facebook, Twitter, Youtube etc. You can even make your Draggable Menus look identical to them.

draggable_menu also allows you to customize the UI and the animations. You can use one of the default themes or create your custom UI from scratch.

Features #

• Fully customizable UI
• Fully customizable levels
• Fully customizable animations
• Compatible with the scrollable usage
• Fast Drag Gestures
• Has multiple listeners to listen to its values
• You can use it without any configurations
• Contains pre-build UIs

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

Quick Start #

To start as fast as possible, you need to know how to create, open and close it.

Create the Draggable Menu #

Create a Draggable Menu widget with a child.

DraggableMenu(
  child: child, // Optional
)

Open the Draggable Menu #

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

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

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() shouldn't be in the same place as the MaterialApp widget.

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

Navigator.pop(context);

Parameters of DraggableMenu #

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) #

First, provide the defaultHeight parameter to set its Level 0 height. And then, give DraggableMenuLevel objects to the levels parameter to define the DraggableMenu's levels.

Define the levels' height in the DraggableMenuLevel's height parameter.

If the defaultHeight parameter isn't provided, it'll throw an error.

DraggableMenu(
  defaultHeight: defaultHeight, // Provide a height value for Level 0
  levels: [
    DraggableMenuLevel(height: height),
    ] 
  allowToShrink: allowToShrink, // Optional. Allows you to minimize your widget at Level 0
  child: child,
)

Use Different UIs #

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

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

DraggableMenu(
  ui: SoftModernDraggableMenu();
  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 parameter.

Using the 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 the 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

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

DraggableMenu(
  ui: SoftModernDraggableMenu();
  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. 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.
)

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

For more info, check out the GitHub Repository.