NgButton — Button · Software Next Generation

Manual · Getting started · Code examples · Models

When to use it

Trigger an application action or submit a form.

Appearance and live example

Try the Blazor example · Flutter example code

The live Blazor preview is embedded above. Use Reset to restore its initial state. Flutter implementation code is provided below; run the Flutter gallery from the installed developer workspace. Dialogs and drawers start closed; use their Open button. Tooltips appear on hover or keyboard focus.

Behavior and practical rules

Use OnClick/onPressed for application actions. In Blazor Type="submit" submits the enclosing form; the default is button. In Flutter a null onPressed disables the button. Disabled actions must also be guarded by your application when starting asynchronous work. Primary uses the shared theme accent. Buttons support Tab and Enter/Space; give icon-only content an accessible name.

Blazor example

Razor / Blazor

<NgButton Primary OnClick="()=>count++">Clicked @count times</NgButton>
@code { private int count; }

Flutter example

Dart / Flutter

int count = 0;
Widget build(BuildContext context) => NgButton(primary: true,
  onPressed: () => setState(() => count++), child: Text('Clicked $count times'));

Blazor parameters and events

Names are case-sensitive. ? permits null. EditorRequired parameters are marked required; other values use the initializer or CLR default.

Parameter	Type	Default / requirement	Purpose
`ChildContent`	`RenderFragment?`	not set	Razor content; for a wizard, a RenderFragment<int> receiving the active index.
`Primary`	`bool`	false	See the behavior rules and model contract above.
`Disabled`	`bool`	false	Disable user interaction.
`Type`	`string`	"button"	See the behavior rules and model contract above.
`OnClick`	`EventCallback<MouseEventArgs>`	not set	Application click handler.
`AdditionalAttributes`	`Dictionary<string,object>?`	not set	Additional HTML/ARIA attributes; do not bypass component validation.

Flutter parameters and events

required marks a mandatory argument even if its type is nullable. key is the standard Flutter Key. The exact constructor below specifies defaults.

Argument	Type	Purpose
`child`	`Widget`	See the behavior rules and model contract above.
`onPressed`	`VoidCallback?`	Application action; null disables the button.
`primary`	`bool`	See the behavior rules and model contract above.

Dart / Flutter

const NgButton({
    super.key,
    required this.child,
    this.onPressed,
    this.primary = false,
  });

Integration and troubleshooting

If the UI does not update, confirm that the parent stores callback values and passes them back. Blazor event handlers need interactive rendering; Flutter requires setState or a state manager. Submit form data only after successful validation.

Check accessible labels, empty/invalid states, disabled actions and narrow layouts. Keyboard support is not full screen-reader certification. Current visual verification targets Web in visible Chrome on Linux/iMac; native mobile platforms are a separate phase.

Source and complete examples

Blazor source
Flutter source
Galleries and launch commands
Capability matrix

API declarations are generated from current source. Curated examples and behavior live in scripts/manual_content.py; regenerate with python3 scripts/generate_manual.py.