gask/ui_loop.go

package main

import (
	"fmt"
	"os"
	"runtime"
	"syscall"

	termbox "github.com/nsf/termbox-go"
)

func uiLoop() int {
	err := termbox.Init()
	if err != nil {
		fmt.Println(err.Error())
		return 1
	}
	termbox.SetOutputMode(termbox.Output256)
	app.BuildScreens()
	displayScreen := app.screens[ScreenMain]
	bundle := Bundle{}
	bundle.setValue(MainBundleListKey, MainBundleListTodo)

	displayScreen.initialize(bundle)
	app.layoutAndDrawScreen(displayScreen)
	eventChan := make(chan termbox.Event)
	go readUserInput(eventChan)
	go checkForUpdate(eventChan)
	for {
		event := <-eventChan
		if event.Type == termbox.EventKey {
			if event.Key == termbox.KeyCtrlC {
				break
			} else if event.Key == termbox.KeyCtrlZ {
				if runtime.GOOS != "windows" {
					process, _ := os.FindProcess(os.Getpid())
					termbox.Close()
					process.Signal(syscall.SIGSTOP)
					termbox.Init()
				}
			}
			newScreenIndex := displayScreen.handleKeyEvent(event)
			if newScreenIndex < len(app.screens) {
				displayScreen = app.screens[newScreenIndex]
				app.layoutAndDrawScreen(displayScreen)
			} else {
				break
			}
		}
		if event.Type == termbox.EventResize {
			displayScreen.initialize(nil)
			app.layoutAndDrawScreen(displayScreen)
		}
	}
	termbox.Close()
	// Any wrap up should be done here...
	return 0
}