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52 | 53 | 54 |const CoreForm({
88 | @required this.form,
89 | @required this.onChanged,
90 | this.padding,
91 | this.form_map,
92 | });Creates a StatefulElement to manage this widget's location in the tree.
It is uncommon for subclasses to override this method.
92 |@override
97 | StatefulElement createElement() => StatefulElement(this);Creates the mutable state for this widget at a given location in the tree.
91 |Subclasses should override this method to return a newly created
92 | instance of their associated State subclass:
@override
94 | _MyState createState() => _MyState();
95 | The framework can call this method multiple times over the lifetime of
97 | a StatefulWidget. For example, if the widget is inserted into the tree
98 | in multiple locations, the framework will create a separate State object
99 | for each location. Similarly, if the widget is removed from the tree and
100 | later inserted into the tree again, the framework will call createState
101 | again to create a fresh State object, simplifying the lifecycle of
102 | State objects.
@override
108 | _CoreFormState createState() =>
109 | new _CoreFormState(form_map ?? json.decode(form));Returns a list of DiagnosticsNode objects describing this node's
91 | children.
Children that are offstage should be added with style set to
93 | DiagnosticsTreeStyle.offstage to indicate that they are offstage.
The list must not contain any null entries. If there are explicit null
95 | children to report, consider new DiagnosticsNode.message or
96 | DiagnosticsProperty<Object> as possible DiagnosticsNode objects to
97 | provide.
See also:
RenderTable.debugDescribeChildren, which provides high quality custom
99 | descriptions for its child nodes.Used by toStringDeep, toDiagnosticsNode and toStringShallow.
101 |@protected
106 | List<DiagnosticsNode> debugDescribeChildren() => const <DiagnosticsNode>[];final String form
87 |
88 | final dynamic form_map
87 |
88 | Controls how one widget replaces another widget in the tree.
86 |If the runtimeType and key properties of the two widgets are
87 | operator==, respectively, then the new widget replaces the old widget by
88 | updating the underlying element (i.e., by calling Element.update with the
89 | new widget). Otherwise, the old element is removed from the tree, the new
90 | widget is inflated into an element, and the new element is inserted into the
91 | tree.
In addition, using a GlobalKey as the widget's key allows the element
93 | to be moved around the tree (changing parent) without losing state. When a
94 | new widget is found (its key and type do not match a previous widget in
95 | the same location), but there was a widget with that same global key
96 | elsewhere in the tree in the previous frame, then that widget's element is
97 | moved to the new location.
Generally, a widget that is the only child of another widget does not need 99 | an explicit key.
100 |See also the discussions at Key and GlobalKey.
final Key key
105 |
106 | Invoked when a non-existent method or property is accessed.
86 |Classes can override noSuchMethod to provide custom behavior.
87 |If a value is returned, it becomes the result of the original invocation.
88 |The default behavior is to throw a NoSuchMethodError.
@pragma("vm:entry-point")
94 | external dynamic noSuchMethod(Invocation invocation);final ValueChanged<dynamic> onChanged
87 |
88 | The equality operator.
86 |The default behavior for all Objects is to return true if and
87 | only if this and other are the same object.
Override this method to specify a different equality relation on 89 | a class. The overriding method must still be an equivalence relation. 90 | That is, it must be:
Total: It must return a boolean for all arguments. It should never throw
92 | or return null.
Reflexive: For all objects o, o == o must be true.
Symmetric: For all objects o1 and o2, o1 == o2 and o2 == o1 must
95 | either both be true, or both be false.
Transitive: For all objects o1, o2, and o3, if o1 == o2 and
97 | o2 == o3 are true, then o1 == o3 must be true.
The method should also be consistent over time, 99 | so whether two objects are equal should only change 100 | if at least one of the objects was modified.
101 |If a subclass overrides the equality operator it should override 102 | the hashCode method as well to maintain consistency.
103 |external bool operator ==(other);final double padding
87 |
88 | A representation of the runtime type of the object.
90 |external Type get runtimeType;Returns a debug representation of the object that is used by debugging 91 | tools and by toStringDeep.
92 |Leave name as null if there is not a meaningful description of the
93 | relationship between the this node and its parent.
Typically the style argument is only specified to indicate an atypical
95 | relationship between the parent and the node. For example, pass
96 | DiagnosticsTreeStyle.offstage to indicate that a node is offstage.
@override
102 | DiagnosticsNode toDiagnosticsNode({ String name, DiagnosticsTreeStyle style }) {
103 | return _DiagnosticableTreeNode(
104 | name: name,
105 | value: this,
106 | style: style,
107 | );
108 | }Returns a string representation of this object.
91 |@override
96 | String toString({ DiagnosticLevel minLevel = DiagnosticLevel.debug }) {
97 | return toDiagnosticsNode(style: DiagnosticsTreeStyle.singleLine).toString(minLevel: minLevel);
98 | }A short, textual description of this widget.
91 |@override
96 | String toStringShort() {
97 | return key == null ? '$runtimeType' : '$runtimeType-$key';
98 | }