BarcodeScanner class abstract
Base for custom bar code scanners
Capabilities: Scanners expose their capabilities via the properties getter.
Flow:
- Scanner is passed to the BarcodeScannerWidget
- BarcodeScanner.configure is called and awaited
- BarcodeScanner.buildUI is called if-and-only-if
properties.hasUIis true - BarcodeScanner.dispose is called when the containing widget is disposed
Constructors
Properties
- controller → BarcodeScannerController
-
The controller controlling the scanner. Will not be called until
configure completes
no setter
- hashCode → int
-
The hash code for this object.
no setterinherited
- properties → ScannerProperties
-
The properties of this scanner. This getter can be called a lot, ensure
it is performant
no setter
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
buildUI(
ScannerConfiguration configuration, BuildContext context) → Widget? -
Called a containing widget needs to display the UI of this scanner
Will not be called if
properties.hasUIis false. -
configure(
{required ScannerConfiguration configuration, required ValueChanged< BarcodeScanResult> onScan}) → Future<void> - Configures the scanner with the provided parameters
-
dispose(
) → void - Called when the scanner is no longer required
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited