package main

import (
    "log"
    "strconv"
    "time"
)

import (
    "github.com/lxn/walk"
    . "github.com/lxn/walk/declarative"
    "strings"
)

type MyMainWindow struct {
    *walk.MainWindow

    outTE *walk.TextEdit
    inTE *walk.TextEdit
}

type Structure struct {
    Index int
}

func main() {
    mw := new(MyMainWindow)

    if _, err := (MainWindow{
        AssignTo: &mw.MainWindow,
        Title:   "SCREAMO",
        MinSize: Size{600, 400},
        Layout:  VBox{},
        Children: []Widget{
            HSplitter{
                Children: []Widget{
                    TextEdit{AssignTo: &mw.inTE},
                    TextEdit{AssignTo: &mw.outTE, ReadOnly: true},
                },
            },
            PushButton{
                Text: "SCREAM",
                OnClicked: func() {
                    mw.mainProcess()
                },
            },
        },
    }.Run()); err != nil {
        log.Fatal(err)
    }
}

func delaySecond(n time.Duration) {
    time.Sleep(n * time.Second)
}

func (mw *MyMainWindow) mainProcess() {
    tmp := make([]Structure, 200)
    for i, item := range tmp {
        item.Index = i
        delaySecond(15)
        mw.outTE.SetText(strconv.Itoa(i) +" " + strings.ToUpper(mw.inTE.Text()))
    }
}