packages/flutter/lib/src/material/raised_button.dart - external/github.com/flutter/flutter - Git at Google

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';

 import 'button.dart';
 import 'button_theme.dart';
 import 'colors.dart';
 import 'constants.dart';
 import 'theme.dart';

 /// A material design "raised button".
 ///
 /// A raised button is based on a [Material] widget whose [Material.elevation]
 /// increases when the button is pressed.
 ///
 /// Use raised buttons to add dimension to otherwise mostly flat layouts, e.g.
 /// in long busy lists of content, or in wide spaces. Avoid using raised buttons
 /// on already-raised content such as dialogs or cards.
 ///
 /// If the [onPressed] callback is null, then the button will be disabled and by
 /// default will resemble a flat button in the [disabledColor]. 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.
 ///
 /// If you want an ink-splash effect for taps, but don't want to use a button,
 /// consider using [InkWell] directly.
 ///
 /// Raised buttons have a minimum size of 88.0 by 36.0 which can be overidden
 /// with [ButtonTheme].
 ///
 /// See also:
 ///
 ///  * [FlatButton], a material design button without a shadow.
 ///  * [DropdownButton], a button that shows options to select from.
 ///  * [FloatingActionButton], the round button in material applications.
 ///  * [IconButton], to create buttons that just contain icons.
 ///  * [InkWell], which implements the ink splash part of a flat button.
 ///  * [RawMaterialButton], the widget this widget is based on.
 ///  * <https://material.google.com/components/buttons.html>
 class RaisedButton extends StatelessWidget {
   /// Create a filled button.
   ///
   /// The [elevation], [highlightElevation], and [disabledElevation]
   /// arguments must not be null.
   const RaisedButton({
     Key key,
     @required this.onPressed,
     this.onHighlightChanged,
     this.textTheme,
     this.textColor,
     this.disabledTextColor,
     this.color,
     this.disabledColor,
     this.highlightColor,
     this.splashColor,
     this.colorBrightness,
     this.elevation = 2.0,
     this.highlightElevation = 8.0,
     this.disabledElevation = 0.0,
     this.padding,
     this.shape,
     this.animationDuration = kThemeChangeDuration,
     this.child,
   }) : assert(elevation != null),
        assert(highlightElevation != null),
        assert(disabledElevation != null),
        assert(animationDuration != null),
        super(key: key);

   /// Create a filled button from a pair of widgets that serve as the button's
   /// [icon] and [label].
   ///
   /// The icon and label are arranged in a row and padded by 12 logical pixels
   /// at the start, and 16 at the end, with an 8 pixel gap in between.
   ///
   /// The [elevation], [highlightElevation], [disabledElevation], [icon], and
   /// [label] arguments must not be null.
   RaisedButton.icon({
     Key key,
     @required this.onPressed,
     this.onHighlightChanged,
     this.textTheme,
     this.textColor,
     this.disabledTextColor,
     this.color,
     this.disabledColor,
     this.highlightColor,
     this.splashColor,
     this.colorBrightness,
     this.elevation = 2.0,
     this.highlightElevation = 8.0,
     this.disabledElevation = 0.0,
     this.shape,
     this.animationDuration = kThemeChangeDuration,
     @required Widget icon,
     @required Widget label,
   }) : assert(elevation != null),
        assert(highlightElevation != null),
        assert(disabledElevation != null),
        assert(icon != null),
        assert(label != null),
        assert(animationDuration != null),
        padding = const EdgeInsetsDirectional.only(start: 12.0, end: 16.0),
        child = new Row(
          mainAxisSize: MainAxisSize.min,
          children: <Widget>[
            icon,
            const SizedBox(width: 8.0),
            label,
          ],
        ),
        super(key: key);

   /// Called when the button is tapped or otherwise activated.
   ///
   /// If this is set to null, the button will be disabled, see [enabled].
   final VoidCallback onPressed;

   /// Called by the underlying [InkWell] widget's [InkWell.onHighlightChanged]
   /// callback.
   final ValueChanged<bool> onHighlightChanged;

   /// Defines the button's base colors, and the defaults for the button's minimum
   /// size, internal padding, and shape.
   ///
   /// Defaults to `ButtonTheme.of(context).textTheme`.
   final ButtonTextTheme textTheme;

   /// The color to use for this button's text.
   ///
   /// The button's [Material.textStyle] will be the current theme's button
   /// text style, [ThemeData.textTheme.button], configured with this color.
   ///
   /// The default text color depends on the button theme's text theme,
   /// [ButtonThemeData.textTheme].
   ///
   /// See also:
   ///   * [disabledTextColor], the text color to use when the button has been
   ///     disabled.
   final Color textColor;

   /// The color to use for this button's text when the button is disabled.
   ///
   /// The button's [Material.textStyle] will be the current theme's button
   /// text style, [ThemeData.textTheme.button], configured with this color.
   ///
   /// The default value is the theme's disabled color,
   /// [ThemeData.disabledColor].
   ///
   /// See also:
   ///  * [textColor] - The color to use for this button's text when the button is [enabled].
   final Color disabledTextColor;

   /// The button's fill color, displayed by its [Material], while it
   /// is in its default (unpressed, [enabled]) state.
   ///
   /// The default fill color is the theme's button color, [ThemeData.buttonColor].
   ///
   /// Typically the default color will be overidden with a Material color,
   /// for example:
   ///
   /// ```dart
   ///  new RaisedButton(
   ///    color: Colors.blue,
   ///    onPressed: _handleTap,
   ///    child: new Text('DEMO'),
   ///  ),
   /// ```
   ///
   /// See also:
   ///   * [disabledColor] - the fill color of the button when the button is disabled.
   final Color color;

   /// The fill color of the button when the button is disabled.
   ///
   /// The default value of this color is the theme's disabled color,
   /// [ThemeData.disabledColor].
   ///
   /// See also:
   ///   * [color] - the fill color of the button when the button is [enabled].
   final Color disabledColor;

   /// The splash color of the button's [InkWell].
   ///
   /// The ink splash indicates that the button has been touched. It
   /// appears on top of the button's child and spreads in an expanding
   /// circle beginning where the touch occurred.
   ///
   /// The default splash color is the current theme's splash color,
   /// [ThemeData.splashColor].
   ///
   /// The appearance of the splash can be configured with the theme's splash
   /// factory, [ThemeData.splashFactory].
   final Color splashColor;

   /// The highlight color of the button's [InkWell].
   ///
   /// The highlight indicates that the button is actively being pressed. It
   /// appears on top of the button's child and quickly spreads to fill
   /// the button, and then fades out.
   ///
   /// If [textTheme] is [ButtonTextTheme.primary], the default highlight color is
   /// transparent (in other words the highlight doesn't appear). Otherwise it's
   /// the current theme's highlight color, [ThemeData.highlightColor].
   final Color highlightColor;

   /// The z-coordinate at which to place this button. This controls the size of
   /// the shadow below the raised button.
   ///
   /// Defaults to 2, the appropriate elevation for raised buttons.
   ///
   /// See also:
   ///
   ///  * [FlatButton], a button with no elevation or fill color.
   ///  * [disabledElevation], the elevation when the button is disabled.
   ///  * [highlightElevation], the elevation when the button is pressed.
   final double elevation;

   /// The elevation for the button's [Material] when the button
   /// is [enabled] but not pressed.
   ///
   /// Defaults to 2.0.
   ///
   /// See also:
   ///
   ///  * [highlightElevation], the default elevation.
   ///  * [disabledElevation], the elevation when the button is disabled.

   /// The elevation for the button's [Material] when the button
   /// is [enabled] and pressed.
   ///
   /// This controls the size of the shadow below the button. When a tap
   /// down gesture occurs within the button, its [InkWell] displays a
   /// [highlightColor] "highlight".
   ///
   /// Defaults to 8.0.
   ///
   /// See also:
   ///
   ///  * [elevation], the default elevation.
   ///  * [disabledElevation], the elevation when the button is disabled.
   final double highlightElevation;

   /// The elevation for the button's [Material] when the button
   /// is not [enabled].
   ///
   /// Defaults to 0.0.
   ///
   /// See also:
   ///
   ///  * [elevation], the default elevation.
   ///  * [highlightElevation], the elevation when the button is pressed.
   final double disabledElevation;

   /// The theme brightness to use for this button.
   ///
   /// Defaults to the theme's brightness, [ThemeData.brightness].
   final Brightness colorBrightness;

   /// The button's label.
   ///
   /// Often a [Text] widget in all caps.
   final Widget child;

   /// Whether the button is enabled or disabled.
   ///
   /// Buttons are disabled by default. To enable a button, set its [onPressed]
   /// property to a non-null value.
   bool get enabled => onPressed != null;

   /// The internal padding for the button's [child].
   ///
   /// Defaults to the value from the current [ButtonTheme],
   /// [ButtonThemeData.padding].
   final EdgeInsetsGeometry padding;

   /// The shape of the button's [Material].
   ///
   /// The button's highlight and splash are clipped to this shape. If the
   /// button has an elevation, then its drop shadow is defined by this
   /// shape as well.
   final ShapeBorder shape;

   /// Defines the duration of animated changes for [shape] and [elevation].
   ///
   /// The default value is [kThemeChangeDuration].
   final Duration animationDuration;

   Brightness _getBrightness(ThemeData theme) {
     return colorBrightness ?? theme.brightness;
   }

   ButtonTextTheme _getTextTheme(ButtonThemeData buttonTheme) {
     return textTheme ?? buttonTheme.textTheme;
   }

   Color _getFillColor(ThemeData theme, ButtonThemeData buttonTheme) {
     final Color fillColor = enabled ? color : disabledColor;
     if (fillColor != null)
       return fillColor;

     final bool themeIsDark = _getBrightness(theme) == Brightness.dark;
     switch (_getTextTheme(buttonTheme)) {
       case ButtonTextTheme.normal:
       case ButtonTextTheme.accent:
         return enabled
           ? theme.buttonColor
           : theme.disabledColor;
       case ButtonTextTheme.primary:
         return enabled
           ? theme.buttonColor
           : (themeIsDark ? Colors.white12 : Colors.black12);
     }
     return null;
   }

   Color _getTextColor(ThemeData theme, ButtonThemeData buttonTheme, Color fillColor) {
     final Color color = enabled ? textColor : disabledTextColor;
     if (color != null)
       return color;

     final bool themeIsDark = _getBrightness(theme) == Brightness.dark;
     final bool fillIsDark = fillColor != null
       ? ThemeData.estimateBrightnessForColor(fillColor) == Brightness.dark
       : themeIsDark;

     switch (_getTextTheme(buttonTheme)) {
       case ButtonTextTheme.normal:
         return enabled
           ? (themeIsDark ? Colors.white : Colors.black87)
           : theme.disabledColor;
       case ButtonTextTheme.accent:
         return enabled
           ? theme.accentColor
           : theme.disabledColor;
       case ButtonTextTheme.primary:
         return enabled
           ? (fillIsDark ? Colors.white : Colors.black)
           : (themeIsDark ? Colors.white30 : Colors.black38);
     }
     return null;
   }

   Color _getHighlightColor(ThemeData theme, ButtonThemeData buttonTheme) {
     if (highlightColor != null)
       return highlightColor;

     switch (_getTextTheme(buttonTheme)) {
       case ButtonTextTheme.normal:
       case ButtonTextTheme.accent:
         return theme.highlightColor;
       case ButtonTextTheme.primary:
         return Colors.transparent;
     }
     return Colors.transparent;
   }

   @override
   Widget build(BuildContext context) {
     final ThemeData theme = Theme.of(context);
     final ButtonThemeData buttonTheme = ButtonTheme.of(context);
     final Color fillColor = _getFillColor(theme, buttonTheme);
     final Color textColor = _getTextColor(theme, buttonTheme, fillColor);

     return new RawMaterialButton(
       onPressed: onPressed,
       onHighlightChanged: onHighlightChanged,
       fillColor: fillColor,
       textStyle: theme.textTheme.button.copyWith(color: textColor),
       highlightColor: _getHighlightColor(theme, buttonTheme),
       splashColor: splashColor ?? theme.splashColor,
       elevation: elevation,
       highlightElevation: highlightElevation,
       disabledElevation: disabledElevation,
       padding: padding ?? buttonTheme.padding,
       constraints: buttonTheme.constraints,
       shape: shape ?? buttonTheme.shape,
       animationDuration: animationDuration,
       child: child,
     );
   }

   @override
   void debugFillProperties(DiagnosticPropertiesBuilder properties) {
     super.debugFillProperties(properties);
     properties.add(new ObjectFlagProperty<VoidCallback>('onPressed', onPressed, ifNull: 'disabled'));
     properties.add(new DiagnosticsProperty<Color>('textColor', textColor, defaultValue: null));
     properties.add(new DiagnosticsProperty<Color>('disabledTextColor', disabledTextColor, defaultValue: null));
     properties.add(new DiagnosticsProperty<Color>('color', color, defaultValue: null));
     properties.add(new DiagnosticsProperty<Color>('disabledColor', disabledColor, defaultValue: null));
     properties.add(new DiagnosticsProperty<Color>('highlightColor', highlightColor, defaultValue: null));
     properties.add(new DiagnosticsProperty<Color>('splashColor', splashColor, defaultValue: null));
     properties.add(new DiagnosticsProperty<Brightness>('colorBrightness', colorBrightness, defaultValue: null));
     properties.add(new DiagnosticsProperty<double>('elevation', elevation, defaultValue: null));
     properties.add(new DiagnosticsProperty<double>('highlightElevation', highlightElevation, defaultValue: null));
     properties.add(new DiagnosticsProperty<double>('disabledElevation', disabledElevation, defaultValue: null));
     properties.add(new DiagnosticsProperty<EdgeInsetsGeometry>('padding', padding, defaultValue: null));
     properties.add(new DiagnosticsProperty<ShapeBorder>('shape', shape, defaultValue: null));
   }
 }
	// Copyright 2015 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	import 'package:flutter/foundation.dart';
	import 'package:flutter/widgets.dart';

	import 'button.dart';
	import 'button_theme.dart';
	import 'colors.dart';
	import 'constants.dart';
	import 'theme.dart';

	/// A material design "raised button".
	///
	/// A raised button is based on a [Material] widget whose [Material.elevation]
	/// increases when the button is pressed.
	///
	/// Use raised buttons to add dimension to otherwise mostly flat layouts, e.g.
	/// in long busy lists of content, or in wide spaces. Avoid using raised buttons
	/// on already-raised content such as dialogs or cards.
	///
	/// If the [onPressed] callback is null, then the button will be disabled and by
	/// default will resemble a flat button in the [disabledColor]. 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.
	///
	/// If you want an ink-splash effect for taps, but don't want to use a button,
	/// consider using [InkWell] directly.
	///
	/// Raised buttons have a minimum size of 88.0 by 36.0 which can be overidden
	/// with [ButtonTheme].
	///
	/// See also:
	///
	/// * [FlatButton], a material design button without a shadow.
	/// * [DropdownButton], a button that shows options to select from.
	/// * [FloatingActionButton], the round button in material applications.
	/// * [IconButton], to create buttons that just contain icons.
	/// * [InkWell], which implements the ink splash part of a flat button.
	/// * [RawMaterialButton], the widget this widget is based on.
	/// * <https://material.google.com/components/buttons.html>
	class RaisedButton extends StatelessWidget {
	/// Create a filled button.
	///
	/// The [elevation], [highlightElevation], and [disabledElevation]
	/// arguments must not be null.
	const RaisedButton({
	Key key,
	@required this.onPressed,
	this.onHighlightChanged,
	this.textTheme,
	this.textColor,
	this.disabledTextColor,
	this.color,
	this.disabledColor,
	this.highlightColor,
	this.splashColor,
	this.colorBrightness,
	this.elevation = 2.0,
	this.highlightElevation = 8.0,
	this.disabledElevation = 0.0,
	this.padding,
	this.shape,
	this.animationDuration = kThemeChangeDuration,
	this.child,
	}) : assert(elevation != null),
	assert(highlightElevation != null),
	assert(disabledElevation != null),
	assert(animationDuration != null),
	super(key: key);

	/// Create a filled button from a pair of widgets that serve as the button's
	/// [icon] and [label].
	///
	/// The icon and label are arranged in a row and padded by 12 logical pixels
	/// at the start, and 16 at the end, with an 8 pixel gap in between.
	///
	/// The [elevation], [highlightElevation], [disabledElevation], [icon], and
	/// [label] arguments must not be null.
	RaisedButton.icon({
	Key key,
	@required this.onPressed,
	this.onHighlightChanged,
	this.textTheme,
	this.textColor,
	this.disabledTextColor,
	this.color,
	this.disabledColor,
	this.highlightColor,
	this.splashColor,
	this.colorBrightness,
	this.elevation = 2.0,
	this.highlightElevation = 8.0,
	this.disabledElevation = 0.0,
	this.shape,
	this.animationDuration = kThemeChangeDuration,
	@required Widget icon,
	@required Widget label,
	}) : assert(elevation != null),
	assert(highlightElevation != null),
	assert(disabledElevation != null),
	assert(icon != null),
	assert(label != null),
	assert(animationDuration != null),
	padding = const EdgeInsetsDirectional.only(start: 12.0, end: 16.0),
	child = new Row(
	mainAxisSize: MainAxisSize.min,
	children: <Widget>[
	icon,
	const SizedBox(width: 8.0),
	label,
	],
	),
	super(key: key);

	/// Called when the button is tapped or otherwise activated.
	///
	/// If this is set to null, the button will be disabled, see [enabled].
	final VoidCallback onPressed;

	/// Called by the underlying [InkWell] widget's [InkWell.onHighlightChanged]
	/// callback.
	final ValueChanged<bool> onHighlightChanged;

	/// Defines the button's base colors, and the defaults for the button's minimum
	/// size, internal padding, and shape.
	///
	/// Defaults to `ButtonTheme.of(context).textTheme`.
	final ButtonTextTheme textTheme;

	/// The color to use for this button's text.
	///
	/// The button's [Material.textStyle] will be the current theme's button
	/// text style, [ThemeData.textTheme.button], configured with this color.
	///
	/// The default text color depends on the button theme's text theme,
	/// [ButtonThemeData.textTheme].
	///
	/// See also:
	/// * [disabledTextColor], the text color to use when the button has been
	/// disabled.
	final Color textColor;

	/// The color to use for this button's text when the button is disabled.
	///
	/// The button's [Material.textStyle] will be the current theme's button
	/// text style, [ThemeData.textTheme.button], configured with this color.
	///
	/// The default value is the theme's disabled color,
	/// [ThemeData.disabledColor].
	///
	/// See also:
	/// * [textColor] - The color to use for this button's text when the button is [enabled].
	final Color disabledTextColor;

	/// The button's fill color, displayed by its [Material], while it
	/// is in its default (unpressed, [enabled]) state.
	///
	/// The default fill color is the theme's button color, [ThemeData.buttonColor].
	///
	/// Typically the default color will be overidden with a Material color,
	/// for example:
	///
	/// ```dart
	/// new RaisedButton(
	/// color: Colors.blue,
	/// onPressed: _handleTap,
	/// child: new Text('DEMO'),
	/// ),
	/// ```
	///
	/// See also:
	/// * [disabledColor] - the fill color of the button when the button is disabled.
	final Color color;

	/// The fill color of the button when the button is disabled.
	///
	/// The default value of this color is the theme's disabled color,
	/// [ThemeData.disabledColor].
	///
	/// See also:
	/// * [color] - the fill color of the button when the button is [enabled].
	final Color disabledColor;

	/// The splash color of the button's [InkWell].
	///
	/// The ink splash indicates that the button has been touched. It
	/// appears on top of the button's child and spreads in an expanding
	/// circle beginning where the touch occurred.
	///
	/// The default splash color is the current theme's splash color,
	/// [ThemeData.splashColor].
	///
	/// The appearance of the splash can be configured with the theme's splash
	/// factory, [ThemeData.splashFactory].
	final Color splashColor;

	/// The highlight color of the button's [InkWell].
	///
	/// The highlight indicates that the button is actively being pressed. It
	/// appears on top of the button's child and quickly spreads to fill
	/// the button, and then fades out.
	///
	/// If [textTheme] is [ButtonTextTheme.primary], the default highlight color is
	/// transparent (in other words the highlight doesn't appear). Otherwise it's
	/// the current theme's highlight color, [ThemeData.highlightColor].
	final Color highlightColor;

	/// The z-coordinate at which to place this button. This controls the size of
	/// the shadow below the raised button.
	///
	/// Defaults to 2, the appropriate elevation for raised buttons.
	///
	/// See also:
	///
	/// * [FlatButton], a button with no elevation or fill color.
	/// * [disabledElevation], the elevation when the button is disabled.
	/// * [highlightElevation], the elevation when the button is pressed.
	final double elevation;

	/// The elevation for the button's [Material] when the button
	/// is [enabled] but not pressed.
	///
	/// Defaults to 2.0.
	///
	/// See also:
	///
	/// * [highlightElevation], the default elevation.
	/// * [disabledElevation], the elevation when the button is disabled.

	/// The elevation for the button's [Material] when the button
	/// is [enabled] and pressed.
	///
	/// This controls the size of the shadow below the button. When a tap
	/// down gesture occurs within the button, its [InkWell] displays a
	/// [highlightColor] "highlight".
	///
	/// Defaults to 8.0.
	///
	/// See also:
	///
	/// * [elevation], the default elevation.
	/// * [disabledElevation], the elevation when the button is disabled.
	final double highlightElevation;

	/// The elevation for the button's [Material] when the button
	/// is not [enabled].
	///
	/// Defaults to 0.0.
	///
	/// See also:
	///
	/// * [elevation], the default elevation.
	/// * [highlightElevation], the elevation when the button is pressed.
	final double disabledElevation;

	/// The theme brightness to use for this button.
	///
	/// Defaults to the theme's brightness, [ThemeData.brightness].
	final Brightness colorBrightness;

	/// The button's label.
	///
	/// Often a [Text] widget in all caps.
	final Widget child;

	/// Whether the button is enabled or disabled.
	///
	/// Buttons are disabled by default. To enable a button, set its [onPressed]
	/// property to a non-null value.
	bool get enabled => onPressed != null;

	/// The internal padding for the button's [child].
	///
	/// Defaults to the value from the current [ButtonTheme],
	/// [ButtonThemeData.padding].
	final EdgeInsetsGeometry padding;

	/// The shape of the button's [Material].
	///
	/// The button's highlight and splash are clipped to this shape. If the
	/// button has an elevation, then its drop shadow is defined by this
	/// shape as well.
	final ShapeBorder shape;

	/// Defines the duration of animated changes for [shape] and [elevation].
	///
	/// The default value is [kThemeChangeDuration].
	final Duration animationDuration;

	Brightness _getBrightness(ThemeData theme) {
	return colorBrightness ?? theme.brightness;
	}

	ButtonTextTheme _getTextTheme(ButtonThemeData buttonTheme) {
	return textTheme ?? buttonTheme.textTheme;
	}

	Color _getFillColor(ThemeData theme, ButtonThemeData buttonTheme) {
	final Color fillColor = enabled ? color : disabledColor;
	if (fillColor != null)
	return fillColor;

	final bool themeIsDark = _getBrightness(theme) == Brightness.dark;
	switch (_getTextTheme(buttonTheme)) {
	case ButtonTextTheme.normal:
	case ButtonTextTheme.accent:
	return enabled
	? theme.buttonColor
	: theme.disabledColor;
	case ButtonTextTheme.primary:
	return enabled
	? theme.buttonColor
	: (themeIsDark ? Colors.white12 : Colors.black12);
	}
	return null;
	}

	Color _getTextColor(ThemeData theme, ButtonThemeData buttonTheme, Color fillColor) {
	final Color color = enabled ? textColor : disabledTextColor;
	if (color != null)
	return color;

	final bool themeIsDark = _getBrightness(theme) == Brightness.dark;
	final bool fillIsDark = fillColor != null
	? ThemeData.estimateBrightnessForColor(fillColor) == Brightness.dark
	: themeIsDark;

	switch (_getTextTheme(buttonTheme)) {
	case ButtonTextTheme.normal:
	return enabled
	? (themeIsDark ? Colors.white : Colors.black87)
	: theme.disabledColor;
	case ButtonTextTheme.accent:
	return enabled
	? theme.accentColor
	: theme.disabledColor;
	case ButtonTextTheme.primary:
	return enabled
	? (fillIsDark ? Colors.white : Colors.black)
	: (themeIsDark ? Colors.white30 : Colors.black38);
	}
	return null;
	}

	Color _getHighlightColor(ThemeData theme, ButtonThemeData buttonTheme) {
	if (highlightColor != null)
	return highlightColor;

	switch (_getTextTheme(buttonTheme)) {
	case ButtonTextTheme.normal:
	case ButtonTextTheme.accent:
	return theme.highlightColor;
	case ButtonTextTheme.primary:
	return Colors.transparent;
	}
	return Colors.transparent;
	}

	@override
	Widget build(BuildContext context) {
	final ThemeData theme = Theme.of(context);
	final ButtonThemeData buttonTheme = ButtonTheme.of(context);
	final Color fillColor = _getFillColor(theme, buttonTheme);
	final Color textColor = _getTextColor(theme, buttonTheme, fillColor);

	return new RawMaterialButton(
	onPressed: onPressed,
	onHighlightChanged: onHighlightChanged,
	fillColor: fillColor,
	textStyle: theme.textTheme.button.copyWith(color: textColor),
	highlightColor: _getHighlightColor(theme, buttonTheme),
	splashColor: splashColor ?? theme.splashColor,
	elevation: elevation,
	highlightElevation: highlightElevation,
	disabledElevation: disabledElevation,
	padding: padding ?? buttonTheme.padding,
	constraints: buttonTheme.constraints,
	shape: shape ?? buttonTheme.shape,
	animationDuration: animationDuration,
	child: child,
	);
	}

	@override
	void debugFillProperties(DiagnosticPropertiesBuilder properties) {
	super.debugFillProperties(properties);
	properties.add(new ObjectFlagProperty<VoidCallback>('onPressed', onPressed, ifNull: 'disabled'));
	properties.add(new DiagnosticsProperty<Color>('textColor', textColor, defaultValue: null));
	properties.add(new DiagnosticsProperty<Color>('disabledTextColor', disabledTextColor, defaultValue: null));
	properties.add(new DiagnosticsProperty<Color>('color', color, defaultValue: null));
	properties.add(new DiagnosticsProperty<Color>('disabledColor', disabledColor, defaultValue: null));
	properties.add(new DiagnosticsProperty<Color>('highlightColor', highlightColor, defaultValue: null));
	properties.add(new DiagnosticsProperty<Color>('splashColor', splashColor, defaultValue: null));
	properties.add(new DiagnosticsProperty<Brightness>('colorBrightness', colorBrightness, defaultValue: null));
	properties.add(new DiagnosticsProperty<double>('elevation', elevation, defaultValue: null));
	properties.add(new DiagnosticsProperty<double>('highlightElevation', highlightElevation, defaultValue: null));
	properties.add(new DiagnosticsProperty<double>('disabledElevation', disabledElevation, defaultValue: null));
	properties.add(new DiagnosticsProperty<EdgeInsetsGeometry>('padding', padding, defaultValue: null));
	properties.add(new DiagnosticsProperty<ShapeBorder>('shape', shape, defaultValue: null));
	}
	}