Function newDashboardTab

termdashdemo/termdashdemo.go:256–526

newDashboardTab creates all Dashboard widgets and returns the tab.

(ctx context.Context, t terminalapi.Terminal)

// newDashboardTab creates all Dashboard widgets and returns the tab.
func newDashboardTab(ctx context.Context, t terminalapi.Terminal) (*dashWidgets, *tab.Tab, error) {
	// ── Segment display ──────────────────────────────────────────────────────
	sd, err := newSegmentDisplay(ctx, t)
	if err != nil {
		return nil, nil, err
	}

	// ── Rolling text ─────────────────────────────────────────────────────────
	rollT, err := text.New(text.RollContent())
	if err != nil {
		return nil, nil, err
	}
	lineNum := 0
	go periodic(ctx, 1*time.Second, func() error {
		err := rollT.Write(fmt.Sprintf("line %d\n", lineNum), text.WriteCellOpts(cell.FgColor(cell.ColorNumber(142))))
		lineNum++
		return err
	})

	// ── SparkLines ───────────────────────────────────────────────────────────
	spGreen, err := sparkline.New(sparkline.Color(cell.ColorGreen))
	if err != nil {
		return nil, nil, err
	}
	go periodic(ctx, 250*time.Millisecond, func() error {
		return spGreen.Add([]int{rand.Intn(101)})
	})

	spRed, err := sparkline.New(sparkline.Color(cell.ColorRed))
	if err != nil {
		return nil, nil, err
	}
	go periodic(ctx, 500*time.Millisecond, func() error {
		return spRed.Add([]int{rand.Intn(101)})
	})

	// ── Gauge ─────────────────────────────────────────────────────────────────
	g, err := gauge.New(gauge.Color(cell.ColorNumber(75)))
	if err != nil {
		return nil, nil, err
	}
	progress := 35
	go periodic(ctx, 2*time.Second, func() error {
		if err := g.Percent(progress, gauge.TextLabel(fmt.Sprintf("%d%%", progress))); err != nil {
			return err
		}
		progress++
		if progress > 100 {
			progress = 35
		}
		return nil
	})

	// ── Heartbeat line chart ──────────────────────────────────────────────────
	var hbInputs []float64
	for i := 0; i < 100; i++ {
		v := math.Pow(math.Sin(float64(i)), 63) * math.Sin(float64(i)+1.5) * 8
		hbInputs = append(hbInputs, v)