[BUG] Exits on Open

[Rudi9719]

Describe the bug After converting from jroimartin/gocui to awesome-gocui (adding params to g.NewGui(), and g.SetView()) my projectnow exits cleanly upon opening rather than starting the main loop.

To Reproduce Steps to reproduce the behavior:

1. Compile project
2. Start Project

Expected behavior TUI with 4 views should appear, and populate with text as they did with jroimartin/gocui

Screenshots N/A

Environment (please complete the following information):

• OS: Ubuntu 19.04
• Version go1.13.1 linux/amd64

Additional context https://github.com/Rudi9719/kbtui/tree/awesome-gocui

I began migrating to this (maintained) fork of gocui to implement features that were missing from the original, however it looks like it just closes after gocui.NewGui() it doesn't return the normal tuple, and just exits.

[mjarkk]

Thanks for creating the issue,
i'll look into your project later today and see if we can fix your issue.

[mjarkk]

I've looked into your code and found the problem.
We do the unknown view check a bit different than the original repo, in your layout function change these checks:

// from this:
if err != gocui.ErrUnknownView {
  return err
}

// to this:
if !gocui.IsUnknownView(err) {
  return err
}

This this behavior can also be found in the example projects: _examples/layout.go#L15

[mjarkk]

I've created a pr in your repo to fix the problem: https://github.com/Rudi9719/kbtui/pull/1

[Rudi9719]

Thanks! Merged in