CachedAssetWidget class
CachedAssetWidget is the cornerstone of this package. It is used to display cached assets of any type. It is a stateful widget that takes a URL and a builder function as parameters. The builder function is called when the asset is ready to be displayed. The builder function is called with a File object as parameter. The File object is the cached asset. The File object can be used to display the asset in any way.
The CachedAssetWidget is used as follows:
CachedAssetWidget(
url: 'https://example.com/image.png',
builder: (context, file) {
return Image.file(file);
},
placeholder: (context) {
return CircularProgressIndicator();
},
);
- Inheritance
-
- Object
- DiagnosticableTree
- Widget
- StatefulWidget
- CachedAssetWidget
Constructors
- CachedAssetWidget({Key? key, required String url, String? fileName, required Widget placeholder(BuildContext context), required Widget builder(BuildContext context, File file)})
-
const
Properties
- builder → Widget Function(BuildContext context, File file)
-
final
- fileName → String?
-
The name of the file to be used to cache the asset.
It is a optional parameter but important if the file extension is needed with the file object in the builder function.
final
- hashCode → int
-
The hash code for this object.
no setterinherited
- key → Key?
-
Controls how one widget replaces another widget in the tree.
finalinherited
- placeholder → Widget Function(BuildContext context)
-
final
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- url → String
-
The URL of the asset to be cached.
final
Methods
-
createElement(
) → StatefulElement -
Creates a StatefulElement to manage this widget's location in the tree.
inherited
-
createState(
) → State< CachedAssetWidget> -
Creates the mutable state for this widget at a given location in the tree.
override
-
debugDescribeChildren(
) → List< DiagnosticsNode> -
Returns a list of DiagnosticsNode objects describing this node's
children.
inherited
-
debugFillProperties(
DiagnosticPropertiesBuilder properties) → void -
Add additional properties associated with the node.
inherited
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toDiagnosticsNode(
{String? name, DiagnosticsTreeStyle? style}) → DiagnosticsNode -
Returns a debug representation of the object that is used by debugging
tools and by DiagnosticsNode.toStringDeep.
inherited
-
toString(
{DiagnosticLevel minLevel = DiagnosticLevel.info}) → String -
A string representation of this object.
inherited
-
toStringDeep(
{String prefixLineOne = '', String? prefixOtherLines, DiagnosticLevel minLevel = DiagnosticLevel.debug, int wrapWidth = 65}) → String -
Returns a string representation of this node and its descendants.
inherited
-
toStringShallow(
{String joiner = ', ', DiagnosticLevel minLevel = DiagnosticLevel.debug}) → String -
Returns a one-line detailed description of the object.
inherited
-
toStringShort(
) → String -
A short, textual description of this widget.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited