type Focusable interface {
// IsFocusable reports whether this widget can currently receive focus.
//
// A widget may return false if it is disabled, invisible, or otherwise
// unable to accept keyboard input at this time.
IsFocusable() bool
// SetFocused sets the widget's focus state.
//
// The focus manager calls this when focus is granted or revoked.
// Widgets should update their visual appearance accordingly.
SetFocused(focused bool)
// IsFocused reports whether this widget currently has keyboard focus.
IsFocused() bool
}
Focusable is implemented by widgets that can receive keyboard focus.
Widgets that support keyboard interaction (text inputs, buttons, etc.)
should implement this interface in addition to the Widget interface.
The focus manager uses this interface to determine which widgets
participate in tab navigation.
WidgetBase already implements SetFocused and IsFocused, so concrete
widgets only need to implement IsFocusable to opt into focus management.
Example:
type TextInput struct {
widget.WidgetBase
}
func (t *TextInput) IsFocusable() bool {
return t.IsEnabled() && t.IsVisible()
}