A material design "flat button".

A flat button is a section printed on a Material widget that reacts to touches by filling with color.

Use flat buttons on toolbars, in dialogs, or inline with other content but offset from that content with padding so that the button's presence is obvious. Flat buttons intentionally do not have visible borders and must therefore rely on their position relative to other content for context. In dialogs and cards, they should be grouped together in one of the bottom corners. Avoid using flat buttons where they would blend in with other content, for example in the middle of lists.

Material design flat buttons have an all-caps label, some internal padding, and some defined dimensions. To have a part of your application be interactive, with ink splashes, without also committing to these stylistic choices, consider using InkWell instead.

If the onPressed callback is null, then the button will be disabled, will not react to touch, and will be colored as specified by the disabledColor property instead of the color property. If you are trying to change the button's color and it is not having any effect, check that you are passing a non-null onPressed handler.

Requires one of its ancestors to be a Material widget.

Flat buttons will expand to fit the child widget, if necessary.

See also:

Inheritance

Constructors

FlatButton({Key key, @required VoidCallback onPressed, Color textColor, Color disabledTextColor, Color color, Color highlightColor, Color splashColor, Color disabledColor, ButtonTextTheme textTheme, Brightness colorBrightness, @required Widget child })
Creates a flat button. [...]
const

Properties

child Widget
The widget below this widget in the tree. [...]
final
color Color
The primary color of the button, as printed on the Material, while it is in its default (unpressed, enabled) state. [...]
final
colorBrightness Brightness
The theme brightness to use for this button. [...]
final
disabledColor Color
The color of the button when the button is disabled. [...]
final
disabledTextColor Color
The color to use for this button's text when the button cannot be pressed. [...]
final
enabled bool
Whether the button is enabled or disabled. [...]
read-only
highlightColor Color
The secondary color of the button when the button is in the down (pressed) state. [...]
final
onPressed VoidCallback
The callback that is called when the button is tapped or otherwise activated. [...]
final
splashColor Color
The primary color of the button when the button is in the down (pressed) state. [...]
final
textColor Color
The color to use for this button's text. [...]
final
textTheme ButtonTextTheme
The color scheme to use for this button's text. [...]
final
hashCode int
The hash code for this object. [...]
read-only, 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.
read-only, inherited

Methods

build(BuildContext context) Widget
Describes the part of the user interface represented by this widget. [...]
debugFillProperties(DiagnosticPropertiesBuilder description) → void
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. [...]
@protected, inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent 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 toStringDeep. [...]
inherited
toString({DiagnosticLevel minLevel: DiagnosticLevel.debug }) String
Returns a string representation of this object.
inherited
toStringDeep({String prefixLineOne: '', String prefixOtherLines, DiagnosticLevel minLevel: DiagnosticLevel.debug }) 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 ==(other) bool
The equality operator. [...]
inherited