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Implementing a determinate CircularProgressIndicator in Flutter?

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0

I understand how to implement an indeterminate progress indicator, but how would you implement a determinate indicator tied to an animation over a specific duration?

Example code:

double _barValue = 1.0;

_animation = Tween(
 begin: 1.0,
 end: 0.0,
).animate(animationController)
 ..addListener(() 
 setState(() 
 _barValue = _animation.value;
 );
 );

CircularProgressIndicator(
 value: _barValue,
 // colorValue: <-- how do you implement this??
 backgroundColor: tangerine.withAlpha(100),
),

dart flutter

share|improve this question

asked Mar 8 at 4:36

Alec SibiliaAlec Sibilia

1411213

add a comment | 

0

I understand how to implement an indeterminate progress indicator, but how would you implement a determinate indicator tied to an animation over a specific duration?

Example code:

double _barValue = 1.0;

_animation = Tween(
 begin: 1.0,
 end: 0.0,
).animate(animationController)
 ..addListener(() 
 setState(() 
 _barValue = _animation.value;
 );
 );

CircularProgressIndicator(
 value: _barValue,
 // colorValue: <-- how do you implement this??
 backgroundColor: tangerine.withAlpha(100),
),

dart flutter

share|improve this question

asked Mar 8 at 4:36

Alec SibiliaAlec Sibilia

1411213

add a comment | 

I understand how to implement an indeterminate progress indicator, but how would you implement a determinate indicator tied to an animation over a specific duration?

Example code:

double _barValue = 1.0;

_animation = Tween(
 begin: 1.0,
 end: 0.0,
).animate(animationController)
 ..addListener(() 
 setState(() 
 _barValue = _animation.value;
 );
 );

CircularProgressIndicator(
 value: _barValue,
 // colorValue: <-- how do you implement this??
 backgroundColor: tangerine.withAlpha(100),
),

dart flutter

share|improve this question

asked Mar 8 at 4:36

Alec SibiliaAlec Sibilia

1411213

double _barValue = 1.0;

_animation = Tween(
 begin: 1.0,
 end: 0.0,
).animate(animationController)
 ..addListener(() 
 setState(() 
 _barValue = _animation.value;
 );
 );

CircularProgressIndicator(
 value: _barValue,
 // colorValue: <-- how do you implement this??
 backgroundColor: tangerine.withAlpha(100),
),

dart flutter

dart flutter

share|improve this question

asked Mar 8 at 4:36

Alec SibiliaAlec Sibilia

1411213

share|improve this question

asked Mar 8 at 4:36

Alec SibiliaAlec Sibilia

1411213

asked Mar 8 at 4:36

Alec SibiliaAlec Sibilia

1411213

asked Mar 8 at 4:36

Alec SibiliaAlec Sibilia

1411213

1 Answer
1

active

oldest

votes

0

If you want it to change colour as the bar progresses, use something like the below. This example will fade from blue at 0% to red at 100% using the same value as the progress in your example:

 AnimationController _colorAnimationController = AnimationController(vsync: this);

 Animation<Color> _colorAnimation = ColorTween(
 begin: Colors.blue,
 end: Colors.red,
 ).animate(
 _colorAnimationController
 );

 _colorAnimationController.value = _barValue;

 ...

 CircularProgressIndicator(
 value: _barValue,
 valueColor: _colorAnimation,
 ),

If you want it to change colours in some kind of pattern separate to the progress, just set the AnimationController up and run it as you would with any other animation.

If you just want to override the value to a specific colour:

 CircularProgressIndicator(
 value: val,
 valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
 ),

share|improve this answer

answered Mar 8 at 8:08

greyauroragreyaurora

1426

add a comment | 

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0

If you want it to change colour as the bar progresses, use something like the below. This example will fade from blue at 0% to red at 100% using the same value as the progress in your example:

 AnimationController _colorAnimationController = AnimationController(vsync: this);

 Animation<Color> _colorAnimation = ColorTween(
 begin: Colors.blue,
 end: Colors.red,
 ).animate(
 _colorAnimationController
 );

 _colorAnimationController.value = _barValue;

 ...

 CircularProgressIndicator(
 value: _barValue,
 valueColor: _colorAnimation,
 ),

If you want it to change colours in some kind of pattern separate to the progress, just set the AnimationController up and run it as you would with any other animation.

If you just want to override the value to a specific colour:

 CircularProgressIndicator(
 value: val,
 valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
 ),

share|improve this answer

answered Mar 8 at 8:08

greyauroragreyaurora

1426

add a comment | 

0

If you want it to change colour as the bar progresses, use something like the below. This example will fade from blue at 0% to red at 100% using the same value as the progress in your example:

 AnimationController _colorAnimationController = AnimationController(vsync: this);

 Animation<Color> _colorAnimation = ColorTween(
 begin: Colors.blue,
 end: Colors.red,
 ).animate(
 _colorAnimationController
 );

 _colorAnimationController.value = _barValue;

 ...

 CircularProgressIndicator(
 value: _barValue,
 valueColor: _colorAnimation,
 ),

If you want it to change colours in some kind of pattern separate to the progress, just set the AnimationController up and run it as you would with any other animation.

If you just want to override the value to a specific colour:

 CircularProgressIndicator(
 value: val,
 valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
 ),

share|improve this answer

answered Mar 8 at 8:08

greyauroragreyaurora

1426

add a comment | 

If you want it to change colour as the bar progresses, use something like the below. This example will fade from blue at 0% to red at 100% using the same value as the progress in your example:

 AnimationController _colorAnimationController = AnimationController(vsync: this);

 Animation<Color> _colorAnimation = ColorTween(
 begin: Colors.blue,
 end: Colors.red,
 ).animate(
 _colorAnimationController
 );

 _colorAnimationController.value = _barValue;

 ...

 CircularProgressIndicator(
 value: _barValue,
 valueColor: _colorAnimation,
 ),

If you want it to change colours in some kind of pattern separate to the progress, just set the AnimationController up and run it as you would with any other animation.

If you just want to override the value to a specific colour:

 CircularProgressIndicator(
 value: val,
 valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
 ),

share|improve this answer

answered Mar 8 at 8:08

greyauroragreyaurora

1426

 AnimationController _colorAnimationController = AnimationController(vsync: this);

 Animation<Color> _colorAnimation = ColorTween(
 begin: Colors.blue,
 end: Colors.red,
 ).animate(
 _colorAnimationController
 );

 _colorAnimationController.value = _barValue;

 ...

 CircularProgressIndicator(
 value: _barValue,
 valueColor: _colorAnimation,
 ),

 CircularProgressIndicator(
 value: val,
 valueColor: AlwaysStoppedAnimation<Color>(Colors.blue),
 ),

share|improve this answer

answered Mar 8 at 8:08

greyauroragreyaurora

1426

answered Mar 8 at 8:08

greyauroragreyaurora

1426

answered Mar 8 at 8:08

greyauroragreyaurora

1426