func Display()

in pkg/display/graph/tree/tree.go [38:111]
64 lines of code
4 McCabe index (conditional complexity)

func Display(roots []*Node, serviceNames []string) error {
	if err := ui.Init(); err != nil {
		logger.Log.Fatalf("failed to initialize termui: %v", err)
	}
	defer ui.Close()

	nodes := make([]*widgets.TreeNode, len(roots))
	for i := range nodes {
		nodes[i] = &widgets.TreeNode{}
	}

	for i, root := range roots {
		adapt(root, nodes[i])
	}

	tree := widgets.NewTree()
	tree.TextStyle = ui.Style{
		Fg:       ui.ColorWhite,
		Bg:       ui.ColorClear,
		Modifier: 0,
	}
	tree.SelectedRowStyle = ui.Style{
		Fg:       ui.ColorBlack,
		Bg:       ui.ColorWhite,
		Modifier: ui.ModifierBold,
	}
	tree.WrapText = false
	tree.SetNodes(nodes)
	tree.Title = fmt.Sprintf("[ %s ]        [%s]", strings.Join(serviceNames, "->"), " Press ? to show help ")
	tree.TitleStyle.Modifier = ui.ModifierBold
	tree.TitleStyle.Fg = ui.ColorRed

	x, y := ui.TerminalDimensions()

	tree.SetRect(0, 0, x, y)

	detail := widgets.NewParagraph()
	detail.Title = Detail
	detail.WrapText = false
	detail.SetRect(x, 0, x, y)

	help := widgets.NewParagraph()
	help.WrapText = false
	help.SetRect(x, 0, x, y)
	help.Title = KeyMap
	help.Text = `
		[?          ](fg:red,mod:bold) Toggle this help
		[k          ](fg:red,mod:bold) Scroll Up
		[<Up>       ](fg:red,mod:bold) Scroll Up
		[j          ](fg:red,mod:bold) Scroll Down
		[<Down>     ](fg:red,mod:bold) Scroll Down
		[<Ctr-b>    ](fg:red,mod:bold) Scroll Page Up
		[<Ctr-u>    ](fg:red,mod:bold) Scroll Half Page Up
		[<Ctr-f>    ](fg:red,mod:bold) Scroll Page Down
		[<Ctr-d>    ](fg:red,mod:bold) Scroll Half Page Down
		[<Home>     ](fg:red,mod:bold) Scroll to Top
		[gg         ](fg:red,mod:bold) Scroll to Top
		[<Enter>    ](fg:red,mod:bold) Show Trace Detail
		[<Space>    ](fg:red,mod:bold) Show Trace Detail
		[o          ](fg:red,mod:bold) Toggle Expand
		[G          ](fg:red,mod:bold) Scroll to Bottom
		[<End>      ](fg:red,mod:bold) Scroll to Bottom
		[E          ](fg:red,mod:bold) Expand All
		[C          ](fg:red,mod:bold) Collapse All
		[q          ](fg:red,mod:bold) Quit
		[<Ctr-c>    ](fg:red,mod:bold) Quit
	`

	ui.Render(tree, detail, help)

	listenKeyboard(tree, detail, help)

	return nil
}