FieldSet

Family: Inputs & Forms
Namespace: Tessera.Controls

Use FieldSet when this interaction is the best match for your screen workflow.

When to use

• You need a FieldSet-style interaction inside the inputs & forms lane.
• A titled widget surface improves scanability in dense shells.
• You want explicit user-driven events routed into app state updates.

Minimal usage

csharp.cs

using Tessera.Controls;
using Tessera.Layout;

var widget = new FieldSet
{
    Title = "FieldSet"
};

return Screen.Build(window => window.Body(body => body.Center(widget, width: 44, height: 9)));

Common pitfalls

• Do not choose FieldSet by name only; validate it against the target workflow.
• Keep this control scoped to the inputs & forms concern; avoid cross-layer state coupling.
• Handle control events by posting/processing messages; avoid hidden mutation in render paths.
• Set focused/normal styles intentionally so keyboard focus remains obvious.
• Keep disabled state explicit and reversible so users understand why actions are blocked.

Public properties

Property	Type
Border	BorderStyle
BorderStyleText	TesseraStyle
DisabledStyle	TesseraStyle
EmptyStyle	TesseraStyle
EmptyText	string
FocusedBorderStyleText	TesseraStyle
FocusedSelectedItemStyle	TesseraStyle
FocusedTitleStyle	TesseraStyle
FocusMarker	string
HoveredItemStyle	TesseraStyle
IsDisabled	bool
IsFocused	bool
IsReadOnly	bool
ItemStyle	TesseraStyle
Padding	Thickness
SectionPrefix	string
SectionSuffix	string
SelectedIndex	int
SelectedItemStyle	TesseraStyle
SelectedMarker	string
ShowFocusMarker	bool
Title	string
TitleStyle	TesseraStyle
UnselectedMarker	string

Public events

Event	Type
SelectionChanged	EventHandler<ListSelectionChangedEventArgs<string>>?

Related docs

• Widget Reference
• Widgets Overview
• Public API Inventory