BubbleTea Subcomponent Parent Updater Functions

main.go

package main

import (
	"fmt"
	tea "github.com/charmbracelet/bubbletea"
	"os"
)

type SubComponentModel struct {
	onClick func()
}

func NewSubComponentModel(onClick func()) SubComponentModel {
	return SubComponentModel{onClick: onClick}
}

func (m SubComponentModel) Update(msg tea.Msg) (SubComponentModel, tea.Cmd) {
	switch msg := msg.(type) {
	case tea.MouseMsg:
		if msg.Type == tea.MouseRelease {
			m.onClick()
		}
	}
	return m, nil
}

func (m SubComponentModel) View() string {
	return ""
}

type model struct {
	clicked      bool
	clickCount   int
	subComponent SubComponentModel
}

func (m model) Init() tea.Cmd {
	return nil
}

func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
	var cmd tea.Cmd
	switch msg := msg.(type) {
	case tea.KeyMsg:
		return m, tea.Quit
	case tea.MouseMsg:
		if msg.Type == tea.MouseRelease {
			m.clickCount += 1
		}
	}
	m.subComponent, cmd = m.subComponent.Update(msg)
	return m, cmd
}

func (m model) View() string {
	if m.clicked {
		return fmt.Sprintf("clicked! (%d)", m.clickCount)
	} else {
		return fmt.Sprintf("not clicked (%d)", m.clickCount)
	}
}

func main() {
	initialModel := model{clicked: false}
	onClick := func() {
		initialModel.clicked = true
	}
	initialModel.subComponent = NewSubComponentModel(onClick)

	program := tea.NewProgram(initialModel, tea.WithAltScreen(), tea.WithMouseAllMotion())
	if err := program.Start(); err != nil {
		fmt.Printf("Error on startup: %v\n", err)
		os.Exit(1)
	}
}

For posterity