ValidationSummary

Family: Inputs & Forms
Namespace: Tessera.Controls

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

When to use

• You need a ValidationSummary-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 ValidationSummary
{
    Title = "ValidationSummary"
};

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

Common pitfalls

• Do not choose ValidationSummary 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
DefaultIssueStyle	TesseraStyle
DisabledIssueStyle	TesseraStyle
EmptyStyle	TesseraStyle
EmptyText	string
ErrorSeverityStyle	TesseraStyle
FocusedBorderStyleText	TesseraStyle
FocusedIssueStyle	TesseraStyle
FocusedTitleStyle	TesseraStyle
FocusMarker	string
HoveredIssueStyle	TesseraStyle
InfoSeverityStyle	TesseraStyle
IsDisabled	bool
IsFocused	bool
IsReadOnly	bool
Padding	Thickness
SelectedIndex	int
SelectedIssueStyle	TesseraStyle
ShowFocusMarker	bool
Title	string
TitleStyle	TesseraStyle
WarningSeverityStyle	TesseraStyle

Public events

Event	Type
SelectionChanged	EventHandler<ValidationSelectionChangedEventArgs>?

Related docs

• Widget Reference
• Widgets Overview
• Public API Inventory