Spice up the UI.

* Full screen ("alt framebuffer").
* Rounded borders.
* Spinner that starts during a refresh.
* Colored table headers.
* Table header have bottom border.

moon/moon.go

@@ -146,8 +146,6 @@ var DefaultGoals = []Goal{
 
 var DefaultConstantBases = []ConstantBase{
 	{"2020-", time.Unix(1577836800, 0)},
-	{"2019-", time.Unix(1546300800, 0)},
-	{"2018-", time.Unix(1514764800, 0)},
 	{"2017-", time.Unix(1483228800, 0)},
 }
 

moonmath.go

@@ -7,7 +7,6 @@ import (
 	"code.humancabbage.net/sam/moonmath/config"
 	"code.humancabbage.net/sam/moonmath/tui"
 	"github.com/alecthomas/kong"
-	tea "github.com/charmbracelet/bubbletea"
 )
 
 var CLI struct {
@@ -23,7 +22,7 @@ func main() {
 	if err != nil {
 		fail(err)
 	}
-	p := tea.NewProgram(tui.New(cfg))
+	p := tui.New(cfg)
 	if _, err := p.Run(); err != nil {
 		fail(err)
 	}

tui/tui.go

@@ -13,60 +13,83 @@ import (
 	"github.com/charmbracelet/lipgloss"
 )
 
+func New(cfg config.Data) (p *tea.Program) {
+	p = tea.NewProgram(
+		newModel(cfg),
+		tea.WithAltScreen(),
+		tea.WithFPS(30),
+	)
+	return
+}
+
 type Model struct {
 	math moon.Math
 
-	reloading bool
+	refreshing bool
 	indicator  spinner.Model
 
-	prices      table.Model
+	properties  table.Model
 	projections table.Model
 }
 
-func New(cfg config.Data) Model {
+func newModel(cfg config.Data) (m Model) {
-	math := moon.NewMath(
+	m.math = moon.NewMath(
 		cfg.Asset,
 		cfg.Goals,
-		config.GetBases(&cfg))
+		config.GetBases(&cfg),
+	)
 
 	tableStyle := table.DefaultStyles()
-	tableStyle.Selected = lipgloss.NewStyle()
+	tableStyle.Selected = tableStyle.Cell.Copy().
-	prices := table.New(
+		Padding(0)
+	tableStyle.Header = tableStyle.Header.
+		Bold(true).
+		Foreground(lipgloss.Color("214")).
+		Border(baseStyle.GetBorderStyle(), false, false, true, false)
+
+	// properties table
+
+	m.properties = table.New(
 		table.WithColumns([]table.Column{
-			{Title: "Asset", Width: 6},
+			{Title: "Property", Width: 9},
-			{Title: "Price", Width: 9},
+			{Title: "Value", Width: 9},
 		}),
-		table.WithHeight(1),
+		table.WithHeight(2),
 		table.WithStyles(tableStyle),
 	)
 
-	projectionCols := []table.Column{
+	// projections table
-		{Title: "Labels", Width: 8},
+
+	labelsWidth := 0
+	for _, l := range m.math.Labels {
+		if len(l) > labelsWidth {
+			labelsWidth = len(l)
 		}
-	for i := range math.Columns {
+	}
+	projectionCols := []table.Column{
+		{Title: "Labels", Width: labelsWidth},
+	}
+	for _, c := range m.math.Columns {
 		projectionCols = append(projectionCols,
 			table.Column{
-				Title: math.Columns[i].Base.Label(),
+				Title: c.Base.Label(),
 				Width: 10,
 			})
 	}
-	projections := table.New(
+	m.projections = table.New(
 		table.WithColumns(projectionCols),
-		table.WithHeight(len(math.Labels)),
+		table.WithHeight(len(m.math.Labels)),
 		table.WithStyles(tableStyle),
 	)
 
-	indicator := spinner.New()
+	// indicator spinner
-	indicator.Spinner = spinner.Points
+
-	indicator.Style = lipgloss.NewStyle().
+	m.indicator = spinner.New()
+	m.indicator.Spinner = spinner.Points
+	m.indicator.Style = lipgloss.NewStyle().
 		Foreground(lipgloss.Color("69"))
 
-	return Model{
+	return
-		math:        math,
-		indicator:   indicator,
-		prices:      prices,
-		projections: projections,
-	}
 }
 
 func (m Model) Init() tea.Cmd {
@@ -81,20 +104,32 @@ func (m Model) Init() tea.Cmd {
 func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	switch msg := msg.(type) {
 	case refresh:
-		m.reloading = true
+		m.refreshing = true
 		return m, func() tea.Msg {
+			// TODO: log errors
 			_ = m.math.Refresh(context.TODO())
 			return m.math
 		}
 	case moon.Math:
 		m.math = msg
-		m.reloading = false
+		refillProperties(&m)
-		refillPrice(&m)
 		refillProjections(&m)
-		return m, tea.Tick(time.Second*30,
+		return m, tea.Batch(
+			// schedule the next refresh
+			tea.Tick(time.Second*30,
 				func(t time.Time) tea.Msg {
 					return refresh{}
-			})
+				}),
+			// wait a bit to stop the indicator, so that it's more obvious
+			// even when the refresh completes quickly.
+			tea.Tick(time.Millisecond*500,
+				func(t time.Time) tea.Msg {
+					return stopIndicator{}
+				}),
+		)
+	case stopIndicator:
+		m.refreshing = false
+		return m, nil
 	case spinner.TickMsg:
 		var cmd tea.Cmd
 		m.indicator, cmd = m.indicator.Update(msg)
@@ -109,15 +144,14 @@ func (m Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 }
 
 type refresh struct{}
+type stopIndicator struct{}
 
-func refillPrice(m *Model) {
+func refillProperties(m *Model) {
 	rows := []table.Row{
-		[]string{
+		{"Asset", string(m.math.Asset)},
-			string(m.math.Asset),
+		{"Price", fmt.Sprintf("$%0.2f", m.math.CurrentPrice)},
-			fmt.Sprintf("$%0.2f", m.math.CurrentPrice),
-		},
 	}
-	m.prices.SetRows(rows)
+	m.properties.SetRows(rows)
 }
 
 func refillProjections(m *Model) {
@@ -147,16 +181,16 @@ func transpose(slice []table.Row) []table.Row {
 func (m Model) View() string {
 	var s string
 	indicator := ""
-	if m.reloading {
+	if m.refreshing {
 		indicator = m.indicator.View()
 	}
 	right := lipgloss.JoinVertical(
 		lipgloss.Center,
-		baseStyle.Render(m.prices.View()),
+		baseStyle.Render(m.properties.View()),
 		indicator,
 	)
 	s += lipgloss.JoinHorizontal(
-		lipgloss.Top,
+		lipgloss.Center,
 		right,
 		baseStyle.Render(m.projections.View()),
 	)
@@ -164,5 +198,5 @@ func (m Model) View() string {
 }
 
 var baseStyle = lipgloss.NewStyle().
-	BorderStyle(lipgloss.NormalBorder()).
+	BorderStyle(lipgloss.RoundedBorder()).
 	BorderForeground(lipgloss.Color("240"))