horizontalChrome constant
double
const horizontalChrome
Padding/margin overhead outside the Table itself (row card padding, margins, etc.) subtracted from the widget's available width before it's divided between columns. A single named constant so this always agrees with TTableColumnMeasurements.requiredWidth — if the two disagreed, the table-vs-card breakpoint could pass while columns still didn't actually fit.
Implementation
static const double horizontalChrome = 32.0;