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Wolfram Language & System Documentation Center
ControlActive
  • See Also
    • EventHandler
    • CurrentValue
    • Mouseover
    • $ControlActiveSetting
    • $DynamicEvaluation
    • $SynchronousEvaluation
    • PerformanceGoal
  • Related Guides
    • Options & Styling for Interactive Manipulation
    • Dynamic Visualization
    • Gamepad & Device Interface
    • Control Objects
    • Interactive Manipulation
    • Dynamic Interactivity Language
    • Low-Level Interface Control
  • Tech Notes
    • Introduction to Dynamic
    • Advanced Dynamic Functionality
    • Generalized Input
    • See Also
      • EventHandler
      • CurrentValue
      • Mouseover
      • $ControlActiveSetting
      • $DynamicEvaluation
      • $SynchronousEvaluation
      • PerformanceGoal
    • Related Guides
      • Options & Styling for Interactive Manipulation
      • Dynamic Visualization
      • Gamepad & Device Interface
      • Control Objects
      • Interactive Manipulation
      • Dynamic Interactivity Language
      • Low-Level Interface Control
    • Tech Notes
      • Introduction to Dynamic
      • Advanced Dynamic Functionality
      • Generalized Input

ControlActive[act,norm]

evaluates to act if a control that affects act is actively being used, and to norm otherwise.

Details
Details and Options Details and Options
Examples  
Basic Examples  
Scope  
Applications  
Properties & Relations  
See Also
Tech Notes
Related Guides
History
Cite this Page
BUILT-IN SYMBOL
  • See Also
    • EventHandler
    • CurrentValue
    • Mouseover
    • $ControlActiveSetting
    • $DynamicEvaluation
    • $SynchronousEvaluation
    • PerformanceGoal
  • Related Guides
    • Options & Styling for Interactive Manipulation
    • Dynamic Visualization
    • Gamepad & Device Interface
    • Control Objects
    • Interactive Manipulation
    • Dynamic Interactivity Language
    • Low-Level Interface Control
  • Tech Notes
    • Introduction to Dynamic
    • Advanced Dynamic Functionality
    • Generalized Input
    • See Also
      • EventHandler
      • CurrentValue
      • Mouseover
      • $ControlActiveSetting
      • $DynamicEvaluation
      • $SynchronousEvaluation
      • PerformanceGoal
    • Related Guides
      • Options & Styling for Interactive Manipulation
      • Dynamic Visualization
      • Gamepad & Device Interface
      • Control Objects
      • Interactive Manipulation
      • Dynamic Interactivity Language
      • Low-Level Interface Control
    • Tech Notes
      • Introduction to Dynamic
      • Advanced Dynamic Functionality
      • Generalized Input

ControlActive

ControlActive[act,norm]

evaluates to act if a control that affects act is actively being used, and to norm otherwise.

Details

  • ControlActive can be used to switch between a faster computation to be done while controls like sliders are being moved, and a slower computation to be done once the controls are released.
  • ControlActive[act,norm] can also be used to trigger evaluation of norm when controls are released.
  • ControlActive[] is equivalent to ControlActive[True,False].
  • ControlActive[act,norm] is effectively equivalent to If[$ControlActiveSetting,act,norm].

Examples

open all close all

Basic Examples  (1)

Change the display while controls are being used:

Scope  (2)

The arguments of ControlActive can be any expression:

Use ControlActive to switch between a low-resolution and a high-resolution version:

Applications  (2)

Only emit a sound when the manipulator is not actively used:

Use a lower sampling when actively manipulating:

Properties & Relations  (2)

By using the second argument of Dynamic, you can get an effect similar to ControlActive:

Plot functions effectively use ControlActive for the PerformanceGoal setting:

See Also

EventHandler  CurrentValue  Mouseover  $ControlActiveSetting  $DynamicEvaluation  $SynchronousEvaluation  PerformanceGoal

Tech Notes

    ▪
  • Introduction to Dynamic
  • ▪
  • Advanced Dynamic Functionality
  • ▪
  • Generalized Input

Related Guides

    ▪
  • Options & Styling for Interactive Manipulation
  • ▪
  • Dynamic Visualization
  • ▪
  • Gamepad & Device Interface
  • ▪
  • Control Objects
  • ▪
  • Interactive Manipulation
  • ▪
  • Dynamic Interactivity Language
  • ▪
  • Low-Level Interface Control

History

Introduced in 2007 (6.0)

Wolfram Research (2007), ControlActive, Wolfram Language function, https://reference.wolfram.com/language/ref/ControlActive.html.

Text

Wolfram Research (2007), ControlActive, Wolfram Language function, https://reference.wolfram.com/language/ref/ControlActive.html.

CMS

Wolfram Language. 2007. "ControlActive." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/ControlActive.html.

APA

Wolfram Language. (2007). ControlActive. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/ControlActive.html

BibTeX

@misc{reference.wolfram_2025_controlactive, author="Wolfram Research", title="{ControlActive}", year="2007", howpublished="\url{https://reference.wolfram.com/language/ref/ControlActive.html}", note=[Accessed: 01-February-2026]}

BibLaTeX

@online{reference.wolfram_2025_controlactive, organization={Wolfram Research}, title={ControlActive}, year={2007}, url={https://reference.wolfram.com/language/ref/ControlActive.html}, note=[Accessed: 01-February-2026]}

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