draggable_menu 2.0.2

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

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 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.

Modern	Modern (Expandable)	Classic	Classic (Expandable)

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

Category	Parameters	Description
Constraints	double? minHeight	It specifies the min-height of the Draggable Menu. If the child's height is higher, it will take its child's height instead.
Constraints	double? maxHeight	It specifies the max-height of the Draggable Menu's minimized status (Not Expanded). When the menu is expanded, it takes its expandedHeight parameter's value as its height. To be able to use an expandable draggable menu, the expandedHeight parameter must be higher than the maxHeight parameter.
Constraints	double? expandedHeight	It specifies the height of the Draggable Menu when it's expanded. To be able to use an expandable draggable menu, the expandedHeight parameter must be higher than the maxHeight parameter, and the expandable parameter mustn't be null.
Usage	bool? expandable	It specifies whether the Draggable Menu will be expandable or not. The expandedHeight parameter must be provided to use an expandable draggable menu.
Usage	double? closeThreshold	Specifies the Close Threshold of the Draggable Menu. Takes a value between 0 and 1.
Usage	double? expandThreshold	Specifies the Expand Threshold of the Draggable Menu. Takes a value between 0 and 1.
Usage	double? minimizeThreshold	Specifies the Minimize Threshold of the Draggable Menu. Takes a value between 0 and 1.
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.
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.
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.
UI	(required) Widget child	Adds a child inside the Draggable Menu's UI.
UI	CustomDraggableMenu? ui	Overrides the Classic Draggable Menu UI.
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)? addStatusListener	Adds a listener to listen to its Status.
Listener	Function(double menuValue)? addValueListener	Adds a listener to listen to its Menu Value.
Animation	Duration? animationDuration	Specifies the duration of the Draggable Menu's animations.
Animation	Curve? curve	Specifies the curve of the Draggable Menu's animations.

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 uses a root with 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 Expandable Draggable Menu

To do that, first, you should set the expandable parameter to true, and then set the value of the expandedHeight parameter.

The expandedHeight parameter mustn't be null or smaller than the child's height or the maxHeight or the minHeight parameters.

DraggableMenu(
  expandable: true,
  expandedHeight: expandedHeight,// Mustn't be null or smaller than its widget's height or the "maxHeight" or the "minHeight" parameters. 
  maxHeight: maxHeight, // Optional
  minHeight: minHeight, // Optional
  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) {
    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) {
    // Add something to do when its status change
  }
  child: child,
)

The 0 value stands for the Menu's minimized position.

The 1 value stands for the Menu's expanded position.

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, double menuValue) {
    // 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. It's 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 insted.
)

---

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

For more info, check out the GitHub Repository.