DidNotStart class

The screen an application shows when it could not open a renderer.

Five applications had their own, and the differences between them were a background colour and a text colour — the same Scaffold, Center, Padding and Text written out five times. The one difference that mattered is the sentence, and that stays with the caller: the platformer's says where the shader bundle comes from, and that is the most useful thing anybody has ever put on this screen.

Why there is a screen at all

Because the alternative is what two of the three games did before RunSession: catch the throw, print it, and show black for ever. A line in a console is not something a person playing the game can see, and "the window is black" is indistinguishable from a scene with no lights in it.

Inheritance

• Object
• DiagnosticableTree
• Widget
• StatelessWidget
• DidNotStart

Constructors

DidNotStart(Object error, {Key? key, String? explaining, Color background = Colors.black, Color foreground = Colors.white70})

const

Properties

background → Color

final

error → Object

Whatever was thrown. Shown as it is: a stack trace on screen is ugly and is still the fastest route from "it did not start" to why.

final

explaining → String?

What the application knows that the error does not.

final

foreground → Color

final

hashCode → int

The hash code for this object.

no setter, inherited

key → Key?

Controls how one widget replaces another widget in the tree.

final, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

build(BuildContext context) → Widget

Describes the part of the user interface represented by this widget.

override

createElement() → StatelessElement

Creates a StatelessElement to manage this widget's location in the tree.

inherited

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