QrErrorCorrectLevel class
class QrErrorCorrectLevel { static const int L = 1; static const int M = 0; static const int Q = 3; static const int H = 2; // thesee *are* in order of lowest to highest quality...I think // all I know for sure: you can create longer messages w/ item N than N+1 // I assume this correcsponds to more error correction for N+1 static const List<int> levels = const[L,M,Q,H]; static String getName(int level) { switch(level) { case L: return 'Low'; case M: return 'Medium'; case Q: return 'Quality'; case H: return 'High'; default: throw 'not supported'; } } }
Static Properties
const int H #
static const int H = 2;
const int L #
static const int L = 1;
const List<int> levels #
static const List<int> levels = const[L,M,Q,H];
const int M #
static const int M = 0;
const int Q #
static const int Q = 3;
Static Methods
String getName(int level) #
static String getName(int level) { switch(level) { case L: return 'Low'; case M: return 'Medium'; case Q: return 'Quality'; case H: return 'High'; default: throw 'not supported'; } }
Properties
final Type runtimeType #
A representation of the runtime type of the object.
external Type get runtimeType;
Operators
bool operator ==(other) #
The equality operator.
The default behavior for all Object
s is to return true if and
only if this
and
other are the same object.
If a subclass overrides the equality operator it should override
the hashCode
method as well to maintain consistency.
bool operator ==(other) => identical(this, other);
Methods
int hashCode() #
Get a hash code for this object.
All objects have hash codes. Hash codes are guaranteed to be the
same for objects that are equal when compared using the equality
operator ==
. Other than that there are no guarantees about
the hash codes. They will not be consistent between runs and
there are no distribution guarantees.
If a subclass overrides hashCode
it should override the
equality operator as well to maintain consistency.
external int hashCode();
noSuchMethod(String name, List args) #
noSuchMethod
is invoked when users invoke a non-existant method
on an object. The name of the method and the arguments of the
invocation are passed to noSuchMethod
. If noSuchMethod
returns a value, that value becomes the result of the original
invocation.
The default behavior of noSuchMethod
is to throw a
noSuchMethodError
.
external Dynamic noSuchMethod(String name, List args);
const Object() #
Creates a new Object
instance.
Object
instances have no meaningful state, and are only useful
through their identity. An Object
instance is equal to itself
only.
const Object();
String toString() #
Returns a string representation of this object.
external String toString();