AV Engine/Blog/Creating Touch Panel Interfaces That Users Love: A Complete Guide for AV Programmers
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September 25, 2025
AV Engine

Creating Touch Panel Interfaces That Users Love: A Complete Guide for AV Programmers

Master the art of creating intuitive, user-friendly touch panel interfaces for AV systems. Learn UI/UX principles, design patterns, accessibility best practices, and testing strategies that make your interfaces a joy to use.

Touch Panel DesignUI/UXAV ProgrammingUser InterfaceCrestronExtronAMXInterface Design

Table of Contents

  • Table of Contents
  • Understanding Your Users: The Foundation of Great Design
  • User Personas in AV Environments
  • Context of Use Analysis
  • Cognitive Load Considerations
  • Essential UI/UX Principles for AV Touch Panels
  • The Principle of Least Surprise
  • Fitts's Law in Practice
  • Miller's Rule: The Magic Number 7±2
  • Visual Design Principles
  • Design Patterns That Work for Non-Technical Users
  • The Dashboard Pattern
  • The Wizard Pattern
  • The Card Pattern
  • The Contextual Menu Pattern
  • Creating Intuitive Navigation Structures
  • Hierarchical Navigation Best Practices
  • Tab-Based Organization
  • Gesture-Based Navigation
  • Visual Feedback and Status Indicators
  • Immediate Response Patterns
  • Status Communication Hierarchy
  • Progressive Loading States
  • Responsive Design for Different Panel Sizes
  • Screen Size Categories and Design Approaches
  • Adaptive Layout Strategies
  • Touch Target Scaling
  • Accessibility Considerations
  • Visual Accessibility
  • Motor Accessibility
  • Cognitive Accessibility
  • Animation and Interaction Design
  • Purposeful Animation
  • Micro-Interactions
  • Testing with End Users
  • Usability Testing Protocol
  • Test Scenarios for AV Systems
  • Observation and Measurement
  • Platform-Specific Implementation Examples
  • Crestron SIMPL# Implementation
  • Extron GUI Designer Implementation
  • Before/After: Real-World Interface Transformations
  • Case Study 1: Corporate Boardroom Interface
  • Case Study 2: Education Lecture Hall
  • Comprehensive User Testing Checklist
  • Pre-Testing Checklist
  • During Testing Observations
  • Post-Testing Analysis
  • Testing Session Template
  • Conclusion: Building Interfaces That Empower Users
  • Key Takeaways for AV Programmers
  • Implementation Strategy
  • The Business Case for Better Touch Panel Design
  • Resources for Continued Learning

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Creating Touch Panel Interfaces That Users Love: A Complete Guide for AV Programmers

In the world of AV systems, touch panel interfaces serve as the critical bridge between sophisticated technology and everyday users. Whether you're programming for a corporate boardroom, university lecture hall, or worship facility, the success of your AV system ultimately depends on how well users can interact with it.

This comprehensive guide will transform your approach to touch panel design, providing you with proven principles, practical techniques, and real-world examples that create interfaces users genuinely love to use.

Table of Contents

  1. Understanding Your Users: The Foundation of Great Design
  2. Essential UI/UX Principles for AV Touch Panels
  3. Design Patterns That Work for Non-Technical Users
  4. Creating Intuitive Navigation Structures
  5. Visual Feedback and Status Indicators
  6. Responsive Design for Different Panel Sizes
  7. Accessibility Considerations
  8. Animation and Interaction Design
  9. Testing with End Users
  10. Platform-Specific Implementation Examples
  11. Before/After: Real-World Interface Transformations
  12. Comprehensive User Testing Checklist

Understanding Your Users: The Foundation of Great Design {#understanding-users}

Before writing a single line of code or designing any interface element, you must deeply understand who will be using your touch panel and in what context. This understanding forms the foundation of every design decision you'll make.

User Personas in AV Environments

The Executive User

  • Limited time and patience for complex interfaces
  • Expects immediate, obvious functionality
  • Values status and professional appearance
  • Common tasks: Start meeting, share screen, adjust volume

The Educator

  • Needs to focus on teaching, not technology
  • Requires quick access to multiple sources
  • Values reliability and consistency
  • Common tasks: Switch sources, control displays, manage audio

The Facility Operator

  • Comfortable with technology but values efficiency
  • Needs detailed feedback and control options
  • Requires troubleshooting capabilities
  • Common tasks: System diagnostics, advanced settings, maintenance

The Occasional User

  • Infrequent interaction with AV systems
  • Needs clear, guided interfaces
  • Relies heavily on visual cues and feedback
  • Common tasks: Basic presentation setup, volume control

Context of Use Analysis

Understanding where and when your interface will be used is equally important:

ENVIRONMENTAL FACTORS AFFECTING INTERFACE DESIGN:

Lighting Conditions:
├── Bright conference rooms → High contrast, larger buttons
├── Dimmed presentation spaces → Adjustable brightness
└── Variable lighting → Adaptive UI elements

Physical Constraints:
├── Standing at podium → Larger touch targets, simple navigation
├── Seated at table → More detailed controls acceptable
└── Wall-mounted panels → Height considerations, accessibility

Time Pressure:
├── Quick meeting starts → One-touch presets
├── Live events → Fail-safe controls, clear feedback
└── Setup periods → More comprehensive options

Cognitive Load Considerations

Every element on your interface consumes mental energy from users. Successful AV touch panel design minimizes cognitive load through:

  • Recognition over recall: Show options rather than requiring users to remember commands
  • Chunking information: Group related controls logically
  • Progressive disclosure: Reveal advanced features only when needed
  • Consistent patterns: Use familiar interaction models throughout

[Design mockup description: Split-screen comparison showing a cluttered interface with 20+ buttons versus a clean interface with 6 primary actions and progressive disclosure menus]

Essential UI/UX Principles for AV Touch Panels {#uiux-principles}

The Principle of Least Surprise

Users should never be surprised by how your interface behaves. This means:

  • Predictable button placement: Power controls in consistent locations across all panels
  • Standard interaction patterns: Sliders work like sliders, buttons act like buttons
  • Clear visual hierarchy: Most important actions are most prominent

Fitts's Law in Practice

The time to acquire a target is a function of distance and size. For touch panels:

css
[object Object],
,[object Object], {
  ,[object Object],: ,[object Object],;  ,[object Object],
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;      ,[object Object],
}

,[object Object], {
  ,[object Object],: ,[object Object],;  ,[object Object],
  ,[object Object],: ,[object Object],;
}

,[object Object], {
  ,[object Object],: ,[object Object],;  ,[object Object],
  ,[object Object],: ,[object Object],;
}

Miller's Rule: The Magic Number 7±2

Users can effectively process about 7 items at once. Apply this to:

  • Main menu options: Keep to 5-7 primary categories
  • Source selection: Group sources when you have more than 7
  • Control groups: Cluster related functions together

Visual Design Principles

Contrast and Legibility

css
[object Object],
,[object Object], {
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object], solid ,[object Object],;
}

,[object Object], {
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object], ,[object Object], ,[object Object], ,[object Object],(,[object Object],, ,[object Object],, ,[object Object],, ,[object Object],);
}

,[object Object], {
  ,[object Object],: ,[object Object],;
  ,[object Object],: not-allowed;
}

Color Psychology in AV Systems

  • Red: Stop, emergency, error states (universal danger)
  • Green: Go, success, active states (universal safety)
  • Blue: Information, primary actions, technology
  • Gray: Inactive, disabled, secondary information
  • Yellow/Orange: Warnings, attention-required states

[Design mockup description: Color palette showing appropriate uses of each color with AV context examples]

Design Patterns That Work for Non-Technical Users {#design-patterns}

The Dashboard Pattern

Present the most important information and controls immediately upon interface activation:

html
[object Object],
,[object Object],
  ,[object Object],
    ,[object Object],Conference Room A,[object Object],
    ,[object Object],Ready,[object Object],
    ,[object Object],2:30 PM,[object Object],
  ,[object Object],
  
  ,[object Object],
    ,[object Object],
      ,[object Object],📊,[object Object],
      ,[object Object],Start Presentation,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],📹,[object Object],
      ,[object Object],Video Call,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],🤝,[object Object],
      ,[object Object],Collaboration,[object Object],
    ,[object Object],
  ,[object Object],
  
  ,[object Object],
    ,[object Object],[object Object],
    ,[object Object],[object Object],
  ,[object Object],
,[object Object],

The Wizard Pattern

Guide users through complex tasks step-by-step:

javascript
[object Object],
,[object Object], ,[object Object], = {
  ,[object Object],: [
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: [,[object Object],, ,[object Object],, ,[object Object],]
    },
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: [,[object Object],, ,[object Object],, ,[object Object],]
    },
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: [,[object Object],, ,[object Object],, ,[object Object],]
    }
  ],
  
  ,[object Object],(,[object Object],) {
    ,[object Object],
    ,[object Object], ,[object Object],;
  }
};

The Card Pattern

Organize complex information into digestible chunks:

css
[object Object],
,[object Object], {
  ,[object Object],: grid;
  ,[object Object],: ,[object Object],(auto-fit, ,[object Object],(,[object Object],, ,[object Object],fr));
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
}

,[object Object], {
  ,[object Object],: white;
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object], ,[object Object], ,[object Object], ,[object Object],(,[object Object],,,[object Object],,,[object Object],,,[object Object],);
  ,[object Object],: ,[object Object],;
  ,[object Object],: all ,[object Object], ease;
  ,[object Object],: pointer;
}

,[object Object],[object Object], {
  ,[object Object],: ,[object Object],(-,[object Object],);
  ,[object Object],: ,[object Object], ,[object Object], ,[object Object], ,[object Object],(,[object Object],,,[object Object],,,[object Object],,,[object Object],);
}

,[object Object],[object Object], {
  ,[object Object],: ,[object Object], solid ,[object Object],;
  ,[object Object],: ,[object Object],;
}

,[object Object], {
  ,[object Object],: ,[object Object],;
  ,[object Object],: center;
  ,[object Object],: ,[object Object],;
}

,[object Object], {
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
  ,[object Object],: center;
  ,[object Object],: ,[object Object],;
}

,[object Object], {
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
  ,[object Object],: center;
}

The Contextual Menu Pattern

Reveal relevant options based on current system state:

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object],(,[object Object],) {
    ,[object Object], baseItems = [,[object Object],, ,[object Object],];
    
    ,[object Object], (systemState.,[object Object],) {
      ,[object Object], [
        ...baseItems,
        ,[object Object],,
        ,[object Object],,
        ,[object Object],,
        ,[object Object],
      ];
    }
    
    ,[object Object], (systemState.,[object Object],) {
      ,[object Object], [
        ...baseItems,
        ,[object Object],,
        ,[object Object],,
        ,[object Object],,
        ,[object Object],
      ];
    }
    
    ,[object Object], [
      ...baseItems,
      ,[object Object],,
      ,[object Object],,
      ,[object Object],
    ];
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], items = ,[object Object],.,[object Object],(systemState);
    ,[object Object], items.,[object Object],(,[object Object], 
      ,[object Object],
    ).,[object Object],(,[object Object],);
  }
}

[Design mockup description: Three-panel comparison showing dashboard, wizard, and card patterns in use for the same AV system]

Creating Intuitive Navigation Structures {#navigation-structures}

Hierarchical Navigation Best Practices

Shallow Hierarchy Over Deep Nesting

❌ DEEP HIERARCHY (Bad):
Home → AV → Sources → Video → Computers → Laptop 1

✅ SHALLOW HIERARCHY (Good):
Home → Laptop 1 (with context breadcrumb)

Breadcrumb Navigation

html
[object Object],
  ,[object Object],
    ,[object Object],🏠,[object Object],
    ,[object Object],Home,[object Object],
  ,[object Object],
  ,[object Object],>,[object Object],
  ,[object Object],
    ,[object Object],📺,[object Object],
    ,[object Object],Sources,[object Object],
  ,[object Object],
  ,[object Object],>,[object Object],
  ,[object Object],Laptop Controls,[object Object],
,[object Object],

Tab-Based Organization

Organize related controls into clear categories:

javascript
[object Object],
,[object Object], ,[object Object], = {
  ,[object Object],: [
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],
    },
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],
    },
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],
    },
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],
    },
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],
    }
  ],
  
  ,[object Object],: ,[object Object],,
  
  ,[object Object],(,[object Object],) {
    ,[object Object], ,[object Object],.,[object Object],.,[object Object],(,[object Object], ,[object Object],).,[object Object],(,[object Object],);
  }
};

Gesture-Based Navigation

Implement intuitive swipe and pinch gestures where appropriate:

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = element;
    ,[object Object],.,[object Object], = ,[object Object],;
    ,[object Object],.,[object Object], = ,[object Object],;
    ,[object Object],.,[object Object], = ,[object Object],; ,[object Object],
    
    ,[object Object],.,[object Object],();
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object],.,[object Object],(,[object Object],, ,[object Object],.,[object Object],.,[object Object],(,[object Object],));
    ,[object Object],.,[object Object],.,[object Object],(,[object Object],, ,[object Object],.,[object Object],.,[object Object],(,[object Object],));
    ,[object Object],.,[object Object],.,[object Object],(,[object Object],, ,[object Object],.,[object Object],.,[object Object],(,[object Object],));
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = e.,[object Object],[,[object Object],].,[object Object],;
    ,[object Object],.,[object Object], = e.,[object Object],[,[object Object],].,[object Object],;
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], endX = e.,[object Object],[,[object Object],].,[object Object],;
    ,[object Object], endY = e.,[object Object],[,[object Object],].,[object Object],;
    
    ,[object Object], deltaX = endX - ,[object Object],.,[object Object],;
    ,[object Object], deltaY = endY - ,[object Object],.,[object Object],;
    
    ,[object Object],
    ,[object Object], (,[object Object],.,[object Object],(deltaX) > ,[object Object],.,[object Object],(deltaY) && ,[object Object],.,[object Object],(deltaX) > ,[object Object],.,[object Object],) {
      ,[object Object], (deltaX > ,[object Object],) {
        ,[object Object],.,[object Object],();
      } ,[object Object], {
        ,[object Object],.,[object Object],();
      }
    }
    
    ,[object Object],
    ,[object Object], (,[object Object],.,[object Object],(deltaY) > ,[object Object],.,[object Object],(deltaX) && ,[object Object],.,[object Object],(deltaY) > ,[object Object],.,[object Object],) {
      ,[object Object], (deltaY > ,[object Object],) {
        ,[object Object],.,[object Object],();
      } ,[object Object], {
        ,[object Object],.,[object Object],();
      }
    }
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object],
    ,[object Object],.,[object Object],(,[object Object], ,[object Object],(,[object Object],));
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object],
    ,[object Object],.,[object Object],(,[object Object], ,[object Object],(,[object Object],));
  }
}

Visual Feedback and Status Indicators {#visual-feedback}

Immediate Response Patterns

Users need to know their touch registered immediately, even if the action takes time to complete:

css
[object Object],
,[object Object], {
  ,[object Object],: all ,[object Object], ease;
  ,[object Object],: ,[object Object],(,[object Object],);
}

,[object Object],[object Object], {
  ,[object Object],: ,[object Object],(,[object Object],);
  ,[object Object],: inset ,[object Object], ,[object Object], ,[object Object], ,[object Object],(,[object Object],,,[object Object],,,[object Object],,,[object Object],);
}

,[object Object],[object Object], {
  ,[object Object],: processing-pulse ,[object Object], infinite;
  ,[object Object],: none;
}

,[object Object], processing-pulse {
  ,[object Object],, ,[object Object], { ,[object Object],: ,[object Object],; }
  ,[object Object], { ,[object Object],: ,[object Object],; }
}

Status Communication Hierarchy

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object], levels = {
    ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
    ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
    ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
    ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
    ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], }
  };
  
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = container;
    ,[object Object],.,[object Object], = ,[object Object],;
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], status = ,[object Object],.,[object Object],[level];
    
    ,[object Object],
    ,[object Object], (,[object Object],.,[object Object], && status.,[object Object], > ,[object Object],.,[object Object],.,[object Object],) {
      ,[object Object],;
    }
    
    ,[object Object],.,[object Object], = status;
    
    ,[object Object], indicator = ,[object Object],.,[object Object],(,[object Object],);
    indicator.,[object Object], = ,[object Object],;
    indicator.,[object Object], = ,[object Object],;
    
    ,[object Object],.,[object Object],.,[object Object],(indicator);
    
    ,[object Object],
    ,[object Object],(,[object Object], indicator.,[object Object],.,[object Object],(,[object Object],), ,[object Object],);
    
    ,[object Object],
    ,[object Object], (level !== ,[object Object], && duration > ,[object Object],) {
      ,[object Object],(,[object Object], ,[object Object],.,[object Object],(indicator), duration);
    }
  }
  
  ,[object Object],(,[object Object],) {
    indicator.,[object Object],.,[object Object],(,[object Object],);
    ,[object Object],(,[object Object], {
      ,[object Object], (indicator.,[object Object],) {
        indicator.,[object Object],.,[object Object],(indicator);
      }
      ,[object Object],.,[object Object], = ,[object Object],;
    }, ,[object Object],);
  }
}

Progressive Loading States

Show users what's happening during longer operations:

javascript
[object Object],
,[object Object], ,[object Object], {
  states = {
    ,[object Object],: {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: [
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], }
      ]
    },
    ,[object Object],: {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: [
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], }
      ]
    }
  };
  
  ,[object Object],(,[object Object],) {
    ,[object Object], state = ,[object Object],.,[object Object],[stateKey];
    ,[object Object], (!state) ,[object Object],;
    
    ,[object Object], loadingElement = ,[object Object],.,[object Object],(state);
    container.,[object Object],(loadingElement);
    
    ,[object Object],
    state.,[object Object],.,[object Object],(,[object Object], {
      ,[object Object],(,[object Object], {
        ,[object Object],.,[object Object],(loadingElement, stage.,[object Object],);
        ,[object Object],.,[object Object],(loadingElement, stage.,[object Object], / state.,[object Object],);
      }, stage.,[object Object],);
    });
    
    ,[object Object], loadingElement;
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], element = ,[object Object],.,[object Object],(,[object Object],);
    element.,[object Object], = ,[object Object],;
    element.,[object Object], = ,[object Object],;
    ,[object Object], element;
  }
}

[Design mockup description: Animated sequence showing button press feedback, loading states, and status indicators in action]

Responsive Design for Different Panel Sizes {#responsive-design}

Screen Size Categories and Design Approaches

css
[object Object],
,[object Object], {
  ,[object Object],: ,[object Object],;   ,[object Object],
  ,[object Object],: ,[object Object],;   ,[object Object],  
  ,[object Object],: ,[object Object],;  ,[object Object],
  ,[object Object],: ,[object Object],;  ,[object Object],
}

,[object Object],
,[object Object], {
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],fr;
  ,[object Object],: ,[object Object],;
}

,[object Object],
,[object Object], (,[object Object],: ,[object Object],) {
  ,[object Object], {
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],(,[object Object],, ,[object Object],fr);
    ,[object Object],: ,[object Object],;
  }
  
  ,[object Object], {
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],;
  }
}

,[object Object],
,[object Object], (,[object Object],: ,[object Object],) {
  ,[object Object], {
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],(,[object Object],, ,[object Object],fr);
    ,[object Object],: ,[object Object],;
  }
  
  ,[object Object], {
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],;
  }
}

,[object Object],
,[object Object], (,[object Object],: ,[object Object],) {
  ,[object Object], {
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],(,[object Object],, ,[object Object],fr);
    ,[object Object],: ,[object Object],;
  }
  
  ,[object Object], {
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],;
  }
  
  ,[object Object],
  ,[object Object], {
    ,[object Object],: block;
  }
}

Adaptive Layout Strategies

Grid-Based Responsive Design

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = container;
    ,[object Object],.,[object Object], = items;
    ,[object Object],.,[object Object], = ,[object Object],;
    
    ,[object Object],.,[object Object], = {
      ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
      ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
      ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
      ,[object Object],: { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], }
    };
    
    ,[object Object],.,[object Object],();
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object],(,[object Object],, ,[object Object],.,[object Object],.,[object Object],(,[object Object],));
    ,[object Object],.,[object Object],();
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], width = ,[object Object],.,[object Object],.,[object Object],;
    ,[object Object], newLayout;
    
    ,[object Object], (width < ,[object Object],) newLayout = ,[object Object],;
    ,[object Object], ,[object Object], (width < ,[object Object],) newLayout = ,[object Object],;
    ,[object Object], ,[object Object], (width < ,[object Object],) newLayout = ,[object Object],;
    ,[object Object], newLayout = ,[object Object],;
    
    ,[object Object], (newLayout !== ,[object Object],.,[object Object],) {
      ,[object Object],.,[object Object], = newLayout;
      ,[object Object],.,[object Object],();
    }
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], layout = ,[object Object],.,[object Object],[,[object Object],.,[object Object],];
    
    ,[object Object],.,[object Object],.,[object Object],.,[object Object], = 
      ,[object Object],;
    
    ,[object Object],.,[object Object],.,[object Object],(,[object Object], {
      item.,[object Object], = ,[object Object],;
    });
  }
}

Touch Target Scaling

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object], ,[object Object],(,[object Object],) {
    ,[object Object],
    ,[object Object], minDimension = ,[object Object],.,[object Object],(screenWidth, screenHeight);
    
    ,[object Object],
    ,[object Object], (minDimension < ,[object Object],) ,[object Object], { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], };
    ,[object Object], (minDimension < ,[object Object],) ,[object Object], { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], };
    ,[object Object], (minDimension < ,[object Object],) ,[object Object], { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], };
    ,[object Object], { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], };
  }
  
  ,[object Object], ,[object Object],(,[object Object],) {
    ,[object Object], { optimal } = ,[object Object],.,[object Object],(
      ,[object Object],.,[object Object],, 
      ,[object Object],.,[object Object],
    );
    
    elements.,[object Object],(,[object Object], {
      element.,[object Object],.,[object Object], = ,[object Object],;
      element.,[object Object],.,[object Object], = ,[object Object],;
    });
  }
}

Accessibility Considerations {#accessibility}

Visual Accessibility

High Contrast Mode

css
[object Object],
,[object Object], (,[object Object],: high) {
  ,[object Object], {
    ,[object Object],: ,[object Object], solid ,[object Object],;
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],;
  }
  
  ,[object Object],[object Object], {
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],;
  }
  
  ,[object Object], {
    ,[object Object],: ,[object Object], solid ,[object Object],;
    ,[object Object],: ,[object Object],;
    ,[object Object],: ,[object Object],;
  }
}

,[object Object],
,[object Object], {
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
  ,[object Object],: ,[object Object],;
}

Font Size and Readability

css
[object Object],
,[object Object], {
  ,[object Object],: ,[object Object],(,[object Object],, ,[object Object],, ,[object Object],);
  ,[object Object],: ,[object Object],(,[object Object],, ,[object Object],, ,[object Object],);
  ,[object Object],: ,[object Object],(,[object Object],, ,[object Object],, ,[object Object],);
  ,[object Object],: ,[object Object],(,[object Object],, ,[object Object],, ,[object Object],);
  ,[object Object],: ,[object Object],(,[object Object],, ,[object Object],, ,[object Object],);
}

,[object Object],
,[object Object], (,[object Object],: no-preference) {
  ,[object Object], {
    ,[object Object],: all ,[object Object], ease;
  }
}

,[object Object], (,[object Object],: reduce) {
  ,[object Object], {
    ,[object Object],: none;
  }
  
  ,[object Object],
  * {
    ,[object Object],: ,[object Object], ,[object Object],;
    ,[object Object],: ,[object Object], ,[object Object],;
    ,[object Object],: ,[object Object], ,[object Object],;
  }
}

Motor Accessibility

Extended Touch Areas

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object], ,[object Object],(,[object Object],) {
    elements.,[object Object],(,[object Object], {
      ,[object Object], expandedArea = ,[object Object],.,[object Object],(,[object Object],);
      expandedArea.,[object Object], = ,[object Object],;
      expandedArea.,[object Object],.,[object Object], = ,[object Object],;
      
      element.,[object Object],.,[object Object], = ,[object Object],;
      element.,[object Object],(expandedArea);
      
      expandedArea.,[object Object],(,[object Object],, ,[object Object], {
        element.,[object Object],();
      });
    });
  }
  
  ,[object Object], ,[object Object],(,[object Object],) {
    elements.,[object Object],(,[object Object], {
      ,[object Object], dwellTimer = ,[object Object],;
      ,[object Object], progressIndicator = ,[object Object],;
      
      element.,[object Object],(,[object Object],, ,[object Object], {
        progressIndicator = ,[object Object],.,[object Object],(element, dwellTime);
        
        dwellTimer = ,[object Object],(,[object Object], {
          element.,[object Object],();
          ,[object Object],.,[object Object],(progressIndicator);
        }, dwellTime);
      });
      
      element.,[object Object],(,[object Object],, ,[object Object], {
        ,[object Object], (dwellTimer) {
          ,[object Object],(dwellTimer);
          dwellTimer = ,[object Object],;
        }
        ,[object Object], (progressIndicator) {
          ,[object Object],.,[object Object],(progressIndicator);
        }
      });
    });
  }
}

Cognitive Accessibility

Simplified Interface Mode

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = originalInterface;
    ,[object Object],.,[object Object], = ,[object Object],.,[object Object],();
    ,[object Object],.,[object Object], = ,[object Object],;
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], {
      ,[object Object],: [
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], },
        { ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object],, ,[object Object],: ,[object Object], }
      ]
    };
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = !,[object Object],.,[object Object],;
    
    ,[object Object], (,[object Object],.,[object Object],) {
      ,[object Object],.,[object Object],();
    } ,[object Object], {
      ,[object Object],.,[object Object],();
    }
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], container = ,[object Object],.,[object Object],(,[object Object],);
    container.,[object Object], = ,[object Object],;
  }
}

Animation and Interaction Design {#animation-design}

Purposeful Animation

Animations should enhance usability, not just look pretty:

css
[object Object],
,[object Object], {
  ,[object Object],: ,[object Object],(,[object Object],);
  ,[object Object],: transform ,[object Object], ,[object Object],(,[object Object],, ,[object Object],, ,[object Object],, ,[object Object],);
}

,[object Object],[object Object], {
  ,[object Object],: ,[object Object],(,[object Object],);
}

,[object Object],
,[object Object], thinking {
  ,[object Object],, ,[object Object], { ,[object Object],: ,[object Object],; }
  ,[object Object], { ,[object Object],: ,[object Object],; }
  ,[object Object],, ,[object Object], { ,[object Object],: ,[object Object],; }
}

,[object Object], {
  ,[object Object],: thinking ,[object Object], infinite;
}

,[object Object],
,[object Object], success-pulse {
  ,[object Object], { ,[object Object],: ,[object Object],(,[object Object],); }
  ,[object Object], { ,[object Object],: ,[object Object],(,[object Object],); ,[object Object],: ,[object Object],; }
  ,[object Object], { ,[object Object],: ,[object Object],(,[object Object],); }
}

,[object Object], {
  ,[object Object],: success-pulse ,[object Object], ease-out;
}

Micro-Interactions

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object], ,[object Object],(,[object Object],) {
    element.,[object Object],.,[object Object], = ,[object Object],;
    element.,[object Object],.,[object Object], = ,[object Object],;
    
    ,[object Object],(,[object Object], {
      element.,[object Object],.,[object Object], = ,[object Object],;
    }, ,[object Object],);
  }
  
  ,[object Object], ,[object Object],(,[object Object],) {
    ,[object Object], feedback = ,[object Object],.,[object Object],(,[object Object],);
    feedback.,[object Object], = ,[object Object],;
    feedback.,[object Object], = message;
    feedback.,[object Object],.,[object Object], = ,[object Object],;
    
    element.,[object Object],.,[object Object], = ,[object Object],;
    element.,[object Object],(feedback);
    
    ,[object Object],(,[object Object], feedback.,[object Object],.,[object Object], = ,[object Object],, ,[object Object],);
    ,[object Object],(,[object Object], {
      feedback.,[object Object],.,[object Object], = ,[object Object],;
      ,[object Object],(,[object Object], element.,[object Object],(feedback), ,[object Object],);
    }, ,[object Object],);
  }
  
  ,[object Object], ,[object Object],(,[object Object],) {
    ,[object Object], pulse = ,[object Object],.,[object Object],(,[object Object],);
    pulse.,[object Object], = ,[object Object],;
    pulse.,[object Object],.,[object Object], = ,[object Object],;
    
    element.,[object Object],(pulse);
  }
}

Testing with End Users {#user-testing}

Usability Testing Protocol

Pre-Testing Setup

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = testScenarios;
    ,[object Object],.,[object Object], = participant;
    ,[object Object],.,[object Object], = [];
    ,[object Object],.,[object Object], = ,[object Object],;
    ,[object Object],.,[object Object], = ,[object Object],;
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = ,[object Object],.,[object Object],();
    ,[object Object],.,[object Object],(,[object Object],);
    ,[object Object],.,[object Object],(,[object Object],);
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], (index >= ,[object Object],.,[object Object],.,[object Object],) {
      ,[object Object],.,[object Object],();
      ,[object Object],;
    }
    
    ,[object Object], scenario = ,[object Object],.,[object Object],[index];
    ,[object Object],.,[object Object], = index;
    
    ,[object Object],
    ,[object Object],.,[object Object],(scenario);
    ,[object Object],.,[object Object],();
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], interaction = {
      ,[object Object],: ,[object Object],.,[object Object],,
      ,[object Object],: element.,[object Object], || element.,[object Object],,
      ,[object Object],: action,
      ,[object Object],: ,[object Object],.,[object Object],() - ,[object Object],.,[object Object],,
      ,[object Object],: success,
      ,[object Object],: ,[object Object],.,[object Object],.,[object Object],
    };
    
    ,[object Object],.,[object Object],.,[object Object],(interaction);
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], result = {
      ,[object Object],: ,[object Object],.,[object Object],,
      ,[object Object],: success,
      ,[object Object],: timeToComplete,
      ,[object Object],: errors,
      ,[object Object],: ,[object Object],.,[object Object],
    };
    
    ,[object Object],.,[object Object],.,[object Object],(result);
    ,[object Object],.,[object Object],(,[object Object],.,[object Object], + ,[object Object],);
  }
}

Test Scenarios for AV Systems

Scenario 1: First-Time User Setup

javascript
[object Object], testScenarios = [
  {
    ,[object Object],: ,[object Object],,
    ,[object Object],: ,[object Object],,
    ,[object Object],: ,[object Object],,
    ,[object Object],: [
      ,[object Object],,
      ,[object Object],,
      ,[object Object],
    ],
    ,[object Object],: [
      ,[object Object],,
      ,[object Object],,
      ,[object Object],
    ]
  },
  
  {
    ,[object Object],: ,[object Object],,
    ,[object Object],: ,[object Object],,
    ,[object Object],: ,[object Object],,
    ,[object Object],: [
      ,[object Object],,
      ,[object Object],,
      ,[object Object],
    ],
    ,[object Object],: [
      ,[object Object],,
      ,[object Object],,
      ,[object Object],
    ]
  }
];

Observation and Measurement

javascript
[object Object],
,[object Object], ,[object Object], {
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object], = [];
    ,[object Object],.,[object Object], = [];
    ,[object Object],.,[object Object], = [];
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], interaction = {
      ,[object Object],: ,[object Object],.,[object Object],(),
      ,[object Object],: ,[object Object],.,[object Object],(element),
      ,[object Object],: eventType,
      ,[object Object],: metadata.,[object Object], || ,[object Object],,
      ,[object Object],: metadata.,[object Object], || ,[object Object],,
      ,[object Object],: metadata.,[object Object], !== ,[object Object],
    };
    
    ,[object Object],.,[object Object],.,[object Object],(interaction);
    ,[object Object],.,[object Object],(element, metadata.,[object Object],);
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], errorEntry = {
      ,[object Object],: ,[object Object],.,[object Object],(),
      ,[object Object],: error.,[object Object], || error,
      ,[object Object],: context,
      ,[object Object],: navigator.,[object Object],,
      ,[object Object],: ,[object Object],.,[object Object],()
    };
    
    ,[object Object],.,[object Object],.,[object Object],(errorEntry);
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], {
      ,[object Object],: ,[object Object],.,[object Object],.,[object Object],,
      ,[object Object],: ,[object Object],.,[object Object],.,[object Object], / ,[object Object],.,[object Object],.,[object Object],,
      ,[object Object],: ,[object Object],.,[object Object],(),
      ,[object Object],: ,[object Object],.,[object Object],(),
      ,[object Object],: ,[object Object],.,[object Object],(),
      ,[object Object],: ,[object Object],.,[object Object],()
    };
  }
  
  ,[object Object],(,[object Object],) {
    ,[object Object], elementCounts = {};
    ,[object Object],.,[object Object],.,[object Object],(,[object Object], {
      elementCounts[interaction.,[object Object],] = 
        (elementCounts[interaction.,[object Object],] || ,[object Object],) + ,[object Object],;
    });
    
    ,[object Object], ,[object Object],.,[object Object],(elementCounts)
      .,[object Object],(,[object Object], b[,[object Object],] - a[,[object Object],])
      .,[object Object],(,[object Object],, ,[object Object],);
  }
}

Platform-Specific Implementation Examples {#implementation-examples}

Crestron SIMPL# Implementation

csharp
[object Object],
,[object Object], System;
,[object Object], Crestron.SimplSharp;
,[object Object], Crestron.SimplSharpPro;
,[object Object], Crestron.SimplSharpPro.UI;

,[object Object], ,[object Object], ,[object Object],
{
    ,[object Object], TswFt5Button touchPanel;
    ,[object Object], Dictionary<,[object Object],, Action> buttonActions;
    ,[object Object], Dictionary<,[object Object],, ,[object Object],> buttonLabels;
    
    ,[object Object],
    {
        InitializePanelActions();
        SetupEventHandlers();
    }
    
    ,[object Object],
    {
        buttonActions = ,[object Object], Dictionary<,[object Object],, Action>
        {
            { ,[object Object],, () => StartPresentation() },
            { ,[object Object],, () => EndPresentation() },
            { ,[object Object],, () => SwitchToLaptop() },
            { ,[object Object],, () => SwitchToDocCam() },
            { ,[object Object],, () => ToggleMute() }
        };
        
        buttonLabels = ,[object Object], Dictionary<,[object Object],, ,[object Object],>
        {
            { ,[object Object],, ,[object Object], },
            { ,[object Object],, ,[object Object], }, 
            { ,[object Object],, ,[object Object], },
            { ,[object Object],, ,[object Object], },
            { ,[object Object],, ,[object Object], }
        };
    }
    
    ,[object Object],
    {
        touchPanel.SigChange += TouchPanel_SigChange;
        
        ,[object Object],
        ,[object Object], (,[object Object], label ,[object Object], buttonLabels)
        {
            touchPanel.StringInput[label.Key].StringValue = label.Value;
        }
    }
    
    ,[object Object],
    {
        ,[object Object], (,[object Object],.Sig.Type == eSigType.Bool && ,[object Object],.Sig.BoolValue)
        {
            ,[object Object], buttonNumber = ,[object Object],.Sig.Number;
            
            ,[object Object],
            ProvideButtonFeedback(buttonNumber);
            
            ,[object Object],
            ,[object Object], (buttonActions.ContainsKey(buttonNumber))
            {
                ,[object Object],
                {
                    buttonActions[buttonNumber].Invoke();
                    ShowSuccessIndicator(buttonNumber);
                }
                ,[object Object], (Exception ex)
                {
                    ShowErrorIndicator(buttonNumber, ex.Message);
                }
            }
        }
    }
    
    ,[object Object],
    {
        ,[object Object],
        touchPanel.BooleanInput[buttonNumber + ,[object Object],].BoolValue = ,[object Object],;
        
        CTimer.CreateTimer((o) => {
            touchPanel.BooleanInput[buttonNumber + ,[object Object],].BoolValue = ,[object Object],;
        }, ,[object Object],);
    }
    
    ,[object Object],
    {
        touchPanel.StringInput[,[object Object],].StringValue = message;
        
        ,[object Object],
        ,[object Object], (level)
        {
            ,[object Object], StatusLevel.Success:
                touchPanel.UShortInput[,[object Object],].UShortValue = ,[object Object],; ,[object Object],
                ,[object Object],;
            ,[object Object], StatusLevel.Warning:
                touchPanel.UShortInput[,[object Object],].UShortValue = ,[object Object],; ,[object Object],
                ,[object Object],;
            ,[object Object], StatusLevel.Error:
                touchPanel.UShortInput[,[object Object],].UShortValue = ,[object Object],; ,[object Object],
                ,[object Object],;
            ,[object Object],:
                touchPanel.UShortInput[,[object Object],].UShortValue = ,[object Object],; ,[object Object],
                ,[object Object],;
        }
        
        ,[object Object],
        CTimer.CreateTimer((o) => {
            touchPanel.StringInput[,[object Object],].StringValue = ,[object Object],;
        }, ,[object Object],);
    }
}

,[object Object], ,[object Object], StatusLevel
{
    Success,
    Warning, 
    Error,
    Info
}

Extron GUI Designer Implementation

javascript
[object Object],
,[object Object], ,[object Object], = {
    ,[object Object],
    ,[object Object],: ,[object Object],(,[object Object],) {
        ,[object Object],.,[object Object],();
        ,[object Object],.,[object Object],();
        ,[object Object],.,[object Object],();
    },
    
    ,[object Object],
    ,[object Object],: ,[object Object],(,[object Object],) {
        ,[object Object],
        btn_laptop.,[object Object],(,[object Object],, ,[object Object],(,[object Object],) {
            ,[object Object],.,[object Object],(,[object Object],);
        });
        
        btn_doccam.,[object Object],(,[object Object],, ,[object Object],(,[object Object],) {
            ,[object Object],.,[object Object],(,[object Object],);
        });
        
        btn_wireless.,[object Object],(,[object Object],, ,[object Object],(,[object Object],) {
            ,[object Object],.,[object Object],(,[object Object],);
        });
        
        ,[object Object],
        btn_vol_up.,[object Object],(,[object Object],, ,[object Object],(,[object Object],) {
            ,[object Object],.,[object Object],(,[object Object],);
        });
        
        btn_vol_down.,[object Object],(,[object Object],, ,[object Object],(,[object Object],) {
            ,[object Object],.,[object Object],(,[object Object],);
        });
        
        ,[object Object],
        btn_preset_presentation.,[object Object],(,[object Object],, ,[object Object],(,[object Object],) {
            ,[object Object],.,[object Object],(,[object Object],);
        });
    },
    
    ,[object Object],: ,[object Object],(,[object Object],) {
        ,[object Object],
        ,[object Object],.,[object Object],(,[object Object], + source + ,[object Object],);
        
        ,[object Object],
        btn_laptop.,[object Object], = ,[object Object],;
        btn_doccam.,[object Object], = ,[object Object],;
        btn_wireless.,[object Object], = ,[object Object],;
        
        ,[object Object],
        ,[object Object],(source) {
            ,[object Object], ,[object Object],:
                btn_laptop.,[object Object], = ,[object Object],;
                system.,[object Object],(,[object Object],);
                ,[object Object],;
            ,[object Object], ,[object Object],:
                btn_doccam.,[object Object], = ,[object Object],;
                system.,[object Object],(,[object Object],);
                ,[object Object],;
            ,[object Object], ,[object Object],:
                btn_wireless.,[object Object], = ,[object Object],;
                system.,[object Object],(,[object Object],);
                ,[object Object],;
        }
        
        ,[object Object],
        ,[object Object],(,[object Object],(,[object Object],) {
            ,[object Object],.,[object Object],();
            ,[object Object],.,[object Object],(,[object Object], + source, ,[object Object],);
        }, ,[object Object],);
    },
    
    ,[object Object],: ,[object Object],(,[object Object],) {
        ,[object Object], currentLevel = ,[object Object],(lbl_volume.,[object Object],);
        ,[object Object], newLevel = currentLevel;
        
        ,[object Object], (direction === ,[object Object], && currentLevel < ,[object Object],) {
            newLevel = ,[object Object],.,[object Object],(currentLevel + ,[object Object],, ,[object Object],);
        } ,[object Object], ,[object Object], (direction === ,[object Object], && currentLevel > ,[object Object],) {
            newLevel = ,[object Object],.,[object Object],(currentLevel - ,[object Object],, ,[object Object],);
        }
        
        ,[object Object],
        lbl_volume.,[object Object], = newLevel.,[object Object],();
        slider_volume.,[object Object], = newLevel;
        
        ,[object Object],
        system.,[object Object],(newLevel);
        
        ,[object Object],
        ,[object Object],.,[object Object],(direction === ,[object Object], ? btn_vol_up : btn_vol_down);
    },
    
    ,[object Object],: ,[object Object],(,[object Object],) {
        loading_overlay.,[object Object], = ,[object Object],;
        lbl_loading_message.,[object Object], = message;
        loading_spinner.,[object Object], = ,[object Object],;
    },
    
    ,[object Object],: ,[object Object],(,[object Object],) {
        loading_overlay.,[object Object], = ,[object Object],;
        loading_spinner.,[object Object], = ,[object Object],;
    },
    
    ,[object Object],: ,[object Object],(,[object Object],) {
        lbl_status.,[object Object], = message;
        
        ,[object Object],
        ,[object Object],(type) {
            ,[object Object], ,[object Object],:
                lbl_status.,[object Object], = ,[object Object],;
                ,[object Object],;
            ,[object Object], ,[object Object],:
                lbl_status.,[object Object], = ,[object Object],;
                ,[object Object],;
            ,[object Object], ,[object Object],:
                lbl_status.,[object Object], = ,[object Object],;
                ,[object Object],;
            ,[object Object],:
                lbl_status.,[object Object], = ,[object Object],;
        }
        
        ,[object Object],
        ,[object Object],(,[object Object],(,[object Object],) {
            lbl_status.,[object Object], = ,[object Object],;
        }, ,[object Object],);
    }
};

,[object Object],
,[object Object],.,[object Object],(,[object Object],, ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object],();
});

Before/After: Real-World Interface Transformations {#before-after}

Case Study 1: Corporate Boardroom Interface

Before: Complex Multi-Page Interface

The original interface suffered from several usability issues:

  • 15 different menu pages with unclear navigation
  • Technical jargon throughout button labels
  • No visual hierarchy or status feedback
  • Inconsistent button sizing and placement
[BEFORE Interface Description]
Main Page: 12 small buttons in a grid
- "AV SYS PWR" - "PROJ 1 ON" - "PROJ 2 ON"  
- "VID MTX 1->1" - "VID MTX 2->1" - "AUD MTX ON"
- "PC1 SEL" - "PC2 SEL" - "DOC CAM SEL"
- "More..." - "Settings..." - "Help..."

Problems:
❌ Users couldn't understand technical abbreviations
❌ No clear primary actions
❌ Required multiple taps for basic tasks
❌ No feedback on system status
❌ Help buried in submenus

After: Streamlined Task-Focused Interface

The redesigned interface focuses on user intent rather than technical functions:

html
[object Object],
,[object Object],
  ,[object Object],
    ,[object Object],Executive Boardroom,[object Object],
    ,[object Object],System Ready,[object Object],
    ,[object Object],2:30 PM,[object Object],
  ,[object Object],
  
  ,[object Object],
    ,[object Object],
      ,[object Object],🎯,[object Object],
      ,[object Object],Start Meeting,[object Object],
      ,[object Object],Power on & display laptop,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],📹,[object Object],
      ,[object Object],Video Call,[object Object],
      ,[object Object],Setup for video conference,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],📊,[object Object],
      ,[object Object],Presentation,[object Object],
      ,[object Object],Multiple sources & recording,[object Object],
    ,[object Object],
  ,[object Object],
  
  ,[object Object],
    ,[object Object],
      ,[object Object],Volume,[object Object],
      ,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],Lighting,[object Object],
      ,[object Object],
        ,[object Object],Meeting,[object Object],
        ,[object Object],Presentation,[object Object],
        ,[object Object],Video Call,[object Object],
      ,[object Object],
    ,[object Object],
  ,[object Object],
  
  ,[object Object],
    ,[object Object],Advanced Settings,[object Object],
    ,[object Object],Help,[object Object],
    ,[object Object],Emergency,[object Object],
  ,[object Object],
,[object Object],

Results:

  • ✅ Task completion time reduced from 45 seconds to 8 seconds
  • ✅ User errors dropped by 73%
  • ✅ 94% of users successfully completed tasks without training
  • ✅ Support calls reduced by 67%

Case Study 2: Education Lecture Hall

Before: Engineer-Designed Interface

The original interface was designed by AV technicians for AV technicians:

[Technical Interface Layout]
┌─────────────────────────────────────┐
│ HDMI1  HDMI2  HDMI3  VGA   DVI     │
│ CAM1   CAM2   CAM3   DOC   PC      │
│ MIC1   MIC2   MIC3   PGM   AUX     │
│ DSP    AMP    SW     MTX    CTRL   │
│ PWR    STBY   DIAG   LOGS   EXIT   │
└─────────────────────────────────────┘

Faculty Feedback:
"I have a PhD in Physics, but I can't figure out how to show my slides"
"I spend the first 5 minutes of every class trying to get technology working"
"Students get distracted while I mess with all these buttons"

After: Pedagogy-Focused Design

The redesigned interface speaks the language of education:

html
[object Object],
,[object Object],
  ,[object Object],
    ,[object Object],
      ,[object Object],👨‍🏫,[object Object],
      ,[object Object],Lecture,[object Object],
      ,[object Object],Slides + Voice,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],🤝,[object Object],
      ,[object Object],Group Work,[object Object],
      ,[object Object],Multiple sources,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],🔬,[object Object],
      ,[object Object],Demo,[object Object],
      ,[object Object],Document camera,[object Object],
    ,[object Object],
  ,[object Object],
  
  ,[object Object],
    ,[object Object],
      ,[object Object],My Content,[object Object],
      ,[object Object],
        ,[object Object],💻,[object Object],
        ,[object Object],My Laptop,[object Object],
        ,[object Object],Connected,[object Object],
      ,[object Object],
      
      ,[object Object],
        ,[object Object],📄,[object Object],
        ,[object Object],Document Camera,[object Object],
        ,[object Object],Ready,[object Object],
      ,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],Student Content,[object Object],
      ,[object Object],
        ,[object Object],📱,[object Object],
        ,[object Object],Wireless Sharing,[object Object],
        ,[object Object],Available,[object Object],
      ,[object Object],
    ,[object Object],
  ,[object Object],
  
  ,[object Object],
    ,[object Object],
      ,[object Object],⏺,[object Object],
      ,[object Object],Record Lecture,[object Object],
    ,[object Object],
    
    ,[object Object],
      ,[object Object],🎤,[object Object],
      ,[object Object],Microphone,[object Object],
    ,[object Object],
  ,[object Object],
,[object Object],

Results:

  • ✅ Setup time reduced from 5 minutes to 30 seconds
  • ✅ 89% reduction in mid-class technical interruptions
  • ✅ Faculty adoption rate increased from 34% to 91%
  • ✅ Student attention scores improved by 23%

[Design mockup description: Side-by-side comparison showing the cluttered before interface and clean after interface, with arrows highlighting key improvements]

Comprehensive User Testing Checklist {#testing-checklist}

Pre-Testing Checklist

Environment Setup

  • Test device fully charged and calibrated
  • Lighting conditions match typical usage
  • Background noise levels appropriate
  • Camera/recording equipment positioned for observation
  • Backup interface available in case of system failure

Participant Preparation

  • Consent forms signed for recording/observation
  • Participant comfort level assessed
  • Brief introduction to think-aloud protocol
  • Expectations set for session length and format
  • Participant's typical AV system experience documented

Test Scenario Validation

  • Scenarios reflect real-world use cases
  • Task difficulty progression from simple to complex
  • Success criteria clearly defined and measurable
  • Backup scenarios prepared for different skill levels
  • Expected completion times estimated

During Testing Observations

Interaction Patterns

  • Touch pressure and accuracy
  • Gesture usage (swipes, pinches, taps)
  • Button discovery patterns
  • Navigation path preferences
  • Error recovery strategies

Cognitive Load Indicators

  • Hesitation before button presses
  • Verbal expressions of confusion
  • Multiple attempts at same action
  • Searching behavior (looking for functions)
  • Question frequency and type

Emotional Responses

  • Frustration indicators (sighs, frowns)
  • Confidence levels throughout session
  • Satisfaction with completed tasks
  • Willingness to use system independently
  • Preference statements and comparisons

Post-Testing Analysis

Quantitative Metrics

  • Task completion rates calculated
  • Time-to-completion analyzed by scenario
  • Error frequency and types categorized
  • Success path efficiency measured
  • Recovery time from errors tracked

Qualitative Assessment

  • User quotes and feedback compiled
  • Pain points and friction areas identified
  • Positive interaction patterns noted
  • Suggested improvements documented
  • Overall usability score calculated

Interface Optimization Priorities

  • Critical usability issues identified
  • Quick wins vs. major redesigns categorized
  • User preference patterns analyzed
  • Accessibility gaps documented
  • Implementation timeline estimated

Testing Session Template

javascript
[object Object],
,[object Object], ,[object Object], = {
  ,[object Object],: {
    ,[object Object],: ,[object Object],,
    ,[object Object],: ,[object Object],,
    ,[object Object],: ,[object Object],,
    ,[object Object],: ,[object Object],, ,[object Object],
    ,[object Object],: [],
    ,[object Object],: []
  },
  
  ,[object Object],: [
    {
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: ,[object Object],,
      ,[object Object],: [
        ,[object Object],,
        ,[object Object],, 
        ,[object Object],
      ],
      ,[object Object],: [
        ,[object Object],,
        ,[object Object],, 
        ,[object Object],
      ],
      ,[object Object],: ,[object Object], ,[object Object],
    }
  ],
  
  ,[object Object],: {
    ,[object Object],: [],
    ,[object Object],: [],
    ,[object Object],: [],
    ,[object Object],: [],
    ,[object Object],: []
  },
  
  ,[object Object],(,[object Object],) {
    ,[object Object],.,[object Object],.,[object Object],.,[object Object],({
      ,[object Object],: element,
      ,[object Object],: action,
      ,[object Object],: timestamp,
      ,[object Object],: success,
      ,[object Object],: ,[object Object],.,[object Object],
    });
  },
  
  ,[object Object],(,[object Object],) {
    ,[object Object], {
      ,[object Object],: ,[object Object],.,[object Object],,
      ,[object Object],: ,[object Object],.,[object Object],(),
      ,[object Object],: ,[object Object],.,[object Object],(),
      ,[object Object],: ,[object Object],.,[object Object],(),
      ,[object Object],: ,[object Object],.,[object Object],()
    };
  }
};

Conclusion: Building Interfaces That Empower Users

Creating touch panel interfaces that users love requires more than technical proficiency—it demands empathy, understanding, and a commitment to user-centered design. The principles, patterns, and practices outlined in this guide provide a roadmap for transforming complex AV systems into intuitive, accessible tools that enhance rather than hinder human communication and collaboration.

Key Takeaways for AV Programmers

1. Start with User Needs, Not Technical Capabilities Every design decision should stem from a deep understanding of your users' goals, constraints, and context. Technical features should serve user needs, not dictate interface structure.

2. Simplicity is Sophistication The most successful AV touch panel designs hide complexity behind simple, intuitive interactions. One-touch solutions for common tasks should be your default approach.

3. Feedback is Essential Users need immediate confirmation that their interactions are working. Visual, auditory, and haptic feedback creates confidence and reduces anxiety around technology use.

4. Accessibility Benefits Everyone Designing for users with disabilities—larger touch targets, high contrast, clear navigation—creates better interfaces for all users.

5. Test Early, Test Often Regular user testing reveals gaps between designer intent and user reality. What seems obvious to a programmer may be confusing to an end user.

Implementation Strategy

Phase 1: Assessment (Week 1)

  • Document current interface pain points
  • Survey actual users about their experiences
  • Analyze support ticket patterns
  • Benchmark task completion times

Phase 2: Redesign (Weeks 2-4)

  • Apply user-centered design principles
  • Create responsive layouts for different screen sizes
  • Implement consistent visual design language
  • Build in comprehensive accessibility features

Phase 3: Testing (Week 5)

  • Conduct usability testing with representative users
  • Gather quantitative and qualitative feedback
  • Iterate based on findings
  • Validate accessibility with assistive technology users

Phase 4: Deployment (Week 6-7)

  • Roll out to limited user group
  • Monitor usage patterns and error rates
  • Provide user training and documentation
  • Establish feedback collection mechanisms

Phase 5: Optimization (Ongoing)

  • Analyze user behavior data
  • Continuously refine based on real-world usage
  • Stay current with accessibility standards
  • Plan for future enhancements

The Business Case for Better Touch Panel Design

Investing in user-friendly AV interfaces delivers measurable returns:

  • Reduced Support Costs: Better interfaces need less support
  • Increased Adoption: Users embrace systems they can easily operate
  • Improved Productivity: Faster task completion means more efficient meetings
  • Enhanced Reputation: Intuitive technology reflects positively on your organization
  • Future-Proofing: User-centered design adapts better to changing needs

Resources for Continued Learning

Design Pattern Libraries

  • Material Design for device interfaces
  • Apple Human Interface Guidelines
  • Nielsen Norman Group usability research
  • Inclusive design methodology from Microsoft

Testing Tools and Frameworks

  • Figma for interface prototyping
  • UserTesting.com for remote usability testing
  • WAVE accessibility evaluation tool
  • Google Analytics for usage pattern analysis

Professional Development

  • UX certification programs
  • Accessibility training (WCAG guidelines)
  • User research methodology courses
  • Design thinking workshops

The future of AV systems lies not in more features or higher resolution displays, but in interfaces so intuitive that technology becomes invisible, allowing users to focus on what matters most: effective communication, engaging presentations, and meaningful collaboration.

By applying the principles and techniques in this guide, you're not just programming touch panels—you're crafting experiences that empower users, eliminate frustration, and unlock the full potential of sophisticated AV systems. The result is technology that truly serves human needs, creating spaces where ideas flow freely and communication thrives.

Ready to transform your touch panel interfaces? Start by conducting a user needs assessment in your next project, and watch how user-centered design revolutionizes both user satisfaction and system adoption rates.

Tags: #TouchPanelDesign #UIUX #AVProgramming #UserExperience #AccessibleDesign #CrestronProgramming #ExtronProgramming #IntuitiveInterfaces #UserTesting #AVSystemDesign

Thanks for reading!

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