const double kCalendarStartHour = 7.5;
const double kCalendarEndHour = 17.25;
const Duration kCalendarTimeInterval = Duration(minutes: 30);
const double kCalendarViewHeaderHeight = 60;

/// Minimum pixels per hour. Below this, the grid scrolls vertically rather
/// than compressing further.
const double kCalendarMinPxPerHour = 56;

/// Minimum height of a lesson block in the period-based layout. The grid
/// scrolls vertically once lessons would otherwise be smaller than this.
const double kLessonBlockMinHeight = 50;

/// Fixed height of a break block in the period-based layout. Independent of
/// the actual break duration; breaks are rendered as a compact indicator.
const double kBreakBlockHeight = 28;