PickerDataAdapter<T> class

A picker adapter for array-based and hierarchical data structures.

PickerDataAdapter is the most commonly used adapter that supports both simple arrays and complex hierarchical data. It can handle:

Simple lists: ['Option 1', 'Option 2', 'Option 3']
Multi-dimensional arrays for independent columns
Hierarchical maps for linked columns: {'Category': ['Item1', 'Item2']}
Mixed data types with custom PickerItem objects

Simple Array Example

final adapter = PickerDataAdapter<String>(
  pickerData: ['Apple', 'Banana', 'Orange'],
);

Multi-Column Array Example (Independent Columns)

final adapter = PickerDataAdapter<String>(
  pickerData: [
    ['Red', 'Green', 'Blue'],     // Column 1: Colors
    ['Small', 'Medium', 'Large'], // Column 2: Sizes
  ],
  isArray: true,
);

Hierarchical Example (Linked Columns)

final adapter = PickerDataAdapter<String>(
  pickerData: [
    {
      'Fruits': ['Apple', 'Banana', 'Orange'],
      'Vegetables': ['Carrot', 'Broccoli', 'Spinach'],
    }
  ],
);

Custom PickerItem Example

final adapter = PickerDataAdapter<String>(
  data: [
    PickerItem<String>(
      text: Row(children: [Icon(Icons.apple), Text('Apple')]),
      value: 'apple',
    ),
    PickerItem<String>(
      text: Row(children: [Icon(Icons.android), Text('Banana')]),
      value: 'banana', 
    ),
  ],
);

Inheritance

Object
PickerAdapter<T>
PickerDataAdapter

Constructors

PickerDataAdapter.new({List? pickerData, List<PickerItem<T>>? data, bool isArray = false})

Properties

data ↔ List<PickerItem<T>>: getter/setter pair
hashCode → int: The hash code for this object.
no setterinherited
isArray → bool: final
isLinkage → bool: no setterinherited
length → int: Content length of current column
no setterinherited
maxLevel → int: no setterinherited
picker ↔ Picker?: Reference to the picker widget using this adapter.
getter/setter pairinherited
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
text → String: no setterinherited

Methods

buildItem(BuildContext context, int index) → Widget: Builds the widget for a specific item in the current column.
override
doSelect(int column, int index) → void: inherited
doShow() → void: inherited
getColumnFlex(int column) → int: inherited
getIsLinkage() → bool: override
getLength() → int: Returns the number of items in the current column.
override
getMaxLevel() → int: Returns the maximum number of columns (levels) this adapter supports.
override
getSelectedValues() → List<T>: override
getText() → String: inherited
initSelects() → void: Initializes the selected indices for all columns.
override
makeText(Widget? child, String? text, bool isSel) → Widget: inherited
makeTextEx(Widget? child, String text, Widget? postfix, Widget? suffix, bool isSel) → Widget: inherited
needUpdatePrev(int curIndex) → bool: Need to update previous columns
inherited
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
notifyDataChanged() → void: Notify adapter of data changes
inherited
setColumn(int index) → void: Sets the active column for subsequent operations.
override
toString() → String: A string representation of this object.
inherited

Operators

operator ==(Object other) → bool: The equality operator.
inherited