tview initialize setting for white terminal lovers

main.go

// https://github.com/rivo/tview/pull/395
package main

import (
	"github.com/gdamore/tcell/v2"
	"github.com/rivo/tview"
)

func main() {
	// Set this so we don't overwrite the default terminal colors
	// See https://github.com/rivo/tview/blob/master/styles.go
	tview.Styles.PrimitiveBackgroundColor = tcell.ColorDefault
	tview.Styles.ContrastBackgroundColor = tcell.ColorDefault
	tview.Styles.PrimaryTextColor = tcell.ColorDefault
	tview.Styles.BorderColor = tcell.ColorDefault

	newPrimitive := func(text string) tview.Primitive {
		return tview.NewTextView().
			SetTextAlign(tview.AlignCenter).
			SetText(text)
	}
	menu := newPrimitive("Menu")
	main := newPrimitive("Main content")
	sideBar := newPrimitive("Side Bar")

	grid := tview.NewGrid().
		SetRows(3, 0, 3).
		SetColumns(30, 0, 30).
		SetBorders(true).
		AddItem(newPrimitive("Header"), 0, 0, 1, 3, 0, 0, false).
		AddItem(newPrimitive("Footer"), 2, 0, 1, 3, 0, 0, false)

	// Layout for screens narrower than 100 cells (menu and side bar are hidden).
	grid.AddItem(menu, 0, 0, 0, 0, 0, 0, false).
		AddItem(main, 1, 0, 1, 3, 0, 0, false).
		AddItem(sideBar, 0, 0, 0, 0, 0, 0, false)

	// Layout for screens wider than 100 cells.
	grid.AddItem(menu, 1, 0, 1, 1, 0, 100, false).
		AddItem(main, 1, 1, 1, 1, 0, 100, false).
		AddItem(sideBar, 1, 2, 1, 1, 0, 100, false)

	if err := tview.NewApplication().SetRoot(grid, true).SetFocus(grid).Run(); err != nil {
		panic(err)
	}
}