view method

@override String view()

Renders the current model state for display.

This method is called after every update to refresh the screen. It should return either a String or a View object.

Guidelines

• Keep view functions pure - no side effects
• View should only depend on model state
• Use string interpolation or StringBuffer for complex views
• Consider terminal width/height for responsive layouts

Example

@override
String view() {
  final buffer = StringBuffer();

  // Header
  buffer.writeln('╔════════════════════════════╗');
  buffer.writeln('║      My Application        ║');
  buffer.writeln('╚════════════════════════════╝');
  buffer.writeln();

  // Content
  if (loading) {
    buffer.writeln('Loading...');
  } else {
    for (final item in items) {
      final prefix = item == selectedItem ? '▸ ' : '  ';
      buffer.writeln('$prefix$item');
    }
  }

  buffer.writeln();

  // Footer
  buffer.writeln('↑/↓: Navigate  Enter: Select  q: Quit');

  return buffer.toString();
}

Implementation

@override
String view() {
  final buffer = StringBuffer();

  // Title
  if (title != null) {
    buffer.writeln(title);
    buffer.writeln();
  }

  // Progress
  if (showProgress) {
    buffer.writeln('Step $currentVisibleStep of $totalSteps');
    buffer.writeln();
  }

  // Current step description
  if (_currentStepIndex < _flattenedSteps.length) {
    final step = _flattenedSteps[_currentStepIndex];
    if (step.description != null) {
      buffer.writeln(step.description);
      buffer.writeln();
    }
  }

  // Current step view
  if (_currentModel != null) {
    buffer.write(_currentModel!.view());
  }

  return buffer.toString();
}