func initGUI(ir *gothic.Interpreter) {
ir.UploadImage("bg", loadPNG("background.png"))
ir.Eval(`ttk::label .l -image bg`)
ir.Eval(`pack .l -expand true`)
}
func proc(ir *gothic.Interpreter, num string) {
button := ".b" + num
progress := ".p" + num
channame := "proc" + num
recv := make(chan int)
// register channel and enable button
ir.RegisterCommand(channame, func(_ string, arg int) {
recv <- arg
})
ir.Eval(`%{} configure -state normal`, button)
for {
// wait for an event
<-recv
// simulate activity
ir.Eval(`%{} configure -state disabled -text "In Progress %{}"`, button, num)
for i := 0; i <= 100; i += 2 {
ir.Eval(`%{%s} configure -value %{}`, progress, i)
time.Sleep(5e7)
}
// reset button state and progress value
ir.Eval(`%{} configure -value 0`, progress)
ir.Eval(`%{} configure -state normal -text "Start %{}"`, button, num)
}
}