StarMenu
Easy and Fast Way to build Context Menus

Instead, a star would be wonderful! ;)

A simple way to attach a popup menu to any widget with any widget as menu entries. Menu entry widgets can bind a sub-menu with different shapes. Multiple ways to fine-tune animation and position.

Every widgets can be tapped to display a popup menu! There are currently 3 shapes to choose:

• linear: items are lined by a given angle with a given space between them and with a 3-way alignment.
• circle: items are lined up in a circle shape with a given radius and a star-end angle.
• grid: items are aligned in a grid shape with N columns and a given horizontal and vertical space.

linear	circle	panel

Please take a look at main.dart and main_more.dart in the example/lib dir for the examples.

Using the package is pretty simple:

• install the package with flutter pub add star_menu
• feed the items parameter with the menu entry widgets list
• set the params with StarMenuParameters
• set the child with a widget you wish to press to open the menu

StarMenu(
  params: StarMenuParameters(),
  onStateChanged: (state) => print('State changed: $state'),
  onItemTapped: (index, controller) {
    // here you can programmatically close the menu
    if (index == 7)
      controller.closeMenu();
	print('Menu item $index tapped');
  }),
  items: entries,
  child: FloatingActionButton(
    onPressed: () {print('FloatingActionButton tapped');},
    child: Icon(Icons.looks_one),
  ),
)

• onStateChanged triggers menu state canges:

enum MenuState {
  closed,
  closing,
  opening,
  open,
}

• items parameter is used when entries are known. If you want to build items in runtime use lazyItems, ie when StarMenu is already builded in the widget tree, but the menu items changed:

StarMenu(
  ...
  lazyItems: () async{
      return [
        Container(
          color: Color.fromARGB(255, Random().nextInt(255),
              Random().nextInt(255), Random().nextInt(255)),
          width: 60,
          height: 40,
          child: Text(userName),
        ),
        ...
      ];
  }
)

lazyItems is a callback function which returns Future<List<Widget>> which is called before opening the menu. Only lazyItems or items can be used.

StarMenu can be created also with addStarMenu() widget extension:

FloatingActionButton(
  onPressed: () {print('FloatingActionButton tapped');},
  child: Icon(Icons.looks_one),
).addStarMenu(
	items, 
	StarMenuParameters(), 
  controller,
	onItemTapped: (index, controller) {}),

Programmatically open menu

There are two ways to programmatically open a menu, for example when pressing a button:

• if you already have a StarMenu in the tree, add [StarMenuController] to it:

  StarMenuController starMenuController = StarMenuController();

  StarMenu(
    params: StarMenuParameters(),
    controller: starMenuController,
    items: entries,
    child: ...,
  )

then in your button:

ElevatedButton(
  onPressed: () => starMenuController.openMenu!(),
  child: ...,
),

• if you want to dinamically create a StartMenu for another widget, assign a GlobalKey to your widget:

GlobalKey containerKey = GlobalKey();
...
Container(
  key: containerKey,
  width: 40,
  height: 40,
),

then in your button call StarMenuOverlay.displayStarMenu with the widget context:

ElevatedButton(
  onPressed: () {
    StarMenuOverlay.displayStarMenu(
      containerKey.currentContext!,
      StarMenu(
        params: StarMenuParameters(),
        items: entries,
        parentContext: containerKey.currentContext,
      ),
    );
  },
  child: ...
),

StarMenu

Only [items] or [lazyItems] can be passed, not both.

Name	Type	Defaults	Description
params	class	StarMenuParameters	See below.
items	List?	-	Widget items entry list.
lazyItems	Future<List> Function()?	-	Function to build dynamically items list whenever the menu open occurs.
child	Widget	-	Widget that triggers the opening of the menu. Only [child] or [parentContext] is allowed
parentContext	BuildContext	-	Widget that triggers the opening of the menu. Only [child] or [parentContext] is allowed
controller	StarMenuController	-	context of the Widget where the menu will be opened. Only [child] or [parentContext] is allowed
onStateChanged	Function(MenuState state)?	-	Return current menu state.

StarMenuParameters

Class to define all the parameters for the shape, animation and menu behavior.

Name	Type	Defaults	Description
shape	enum	MenuShape.circle	Menu shape kind. Could be [MenuShape.circle], [MenuShape.linear], [MenuShape.grid].
boundaryBackground	class	-	See below.
linearShapeParams	class	-	See below.
circleShapeParams	class	-	See below.
gridShapeParams	class	-	See below.
backgroundParams	class	-	See below.
openDurationMs	int	400	Open animation duration ms.
closeDurationMs	int	150	Close animation duration ms.
rotateItemsAnimationAngle	double	0.0	Starting rotation angle of the items that will reach 0 DEG when animation ends.
startItemScaleAnimation	double	0.3	Starting scale of the items that will reach 1 when animation ends.
centerOffset	Offset	Offset.zero	Shift offset of menu center from the center of parent widget.
useScreenCenter	bool	false	Use the screen center instead of parent widget center.
useTouchAsCenter	bool	false	Use the touch coordinate as the menu center.
checkItemsScreenBoundaries	bool	false	Checks if the whole menu boundaries exceed screen edges, if so set it in place to be all visible.
checkMenuScreenBoundaries	bool	true	Checks if items exceed screen edges, if so set them in place to be visible.
animationCurve	Curve	Curves.fastOutSlowIn	Animation curve kind to use.
useLongPress	bool	false	Use long press instead of a tap to open the menu.
longPressDuration	Duration	500 ms	The timing to trigger long press.
onHoverScale	double	1.0	Scale item when mouse is hover (desktop only)

There are some StarMenuParameters factory presets with which you can set StarMenu.params

StarMenuParameters.dropdown(BuildContext context)
StarMenuParameters.panel(BuildContext context, {int columns = 3})

StarMenuParameters.arc(BuildContext context, ArcType type, {double radiusX = 130, double radiusY = 130})

type	result
ArcType.semiUp
ArcType.semiDown
ArcType.semiLeft
ArcType.semiRight
ArcType.quarterTopRight
ArcType.quarterTopLeft
ArcType.quarterBottomRight
ArcType.quarterBottomLeft

---

BoundaryBackground

Name	Type	Defaults	Description
color	Color	0x80000000	color of the boundary background.
padding	EdgeInsets	EdgeInsets.all(8.0)	Padding of the boundary background.
decoration	Decoration	BorderRadius.circular(8)	background Container widget decoration.

---

LinearShapeParams

Name	Type	Defaults	Description
angle	double	90.0	Degree angle. Anticlockwise with 0° on 3 o'clock.
space	double	0.0	Space between items.
alignment	LinearAlignment	center	left, center, right, top, bottom. Useful when the linear shape is vertical or horizontal.

---

CircleShapeParams

Name	Type	Defaults	Description
radiusX	double	100.0	Horizontal radius.
radiusY	double	100.0	Vertical radius.
startAngle	double	0.0	Starting angle for the 1st item. Anticlockwise with 0° on the right.
endAngle	double	360.0	Ending angle for the 1st item. Anticlockwise with 0° on the right.

---

GridShapeParams

Name	Type	Defaults	Description
columns	int	3	Number of columns.
columnsSpaceH	int	0	Horizontal space between items.
columnsSpaceV	int	0	Vertical space between items.

---

BackgroundParams

Name	Type	Defaults	Description
animatedBlur	bool	false	Animate background blur from 0.0 to sigma if true.
sigmaX	double	0.0	Horizontal blur.
sigmaY	double	0.0	Vertical blur.
animatedBackgroundColor	bool	false	If true animate from transparent to [backgroundColor].
backgroundColor	Color	Colors.transparent	Background color.