// show displays the form box. It should only be called if no semantic errors are present
func (this *GUIForm) show(window *ui.Window) {
log.WithFields(log.Fields{"identifier": this.Form.Identifier()}).Info("Showing form")
this.FormContainer = ui.NewVerticalBox()
window.SetChild(this.FormContainer)
}
func myMain() {
var cmd *exec.Cmd
var timer *time.Timer
var timerChan <-chan time.Time
var w *ui.Window
status := ui.NewLabel("")
stop := func() {
if cmd != nil { // stop the command if it's running
err := cmd.Process.Kill()
if err != nil {
ui.MsgBoxError(w,
fmt.Sprintf("Error killing process: %v", err),
"You may need to kill it manually.")
}
err = cmd.Process.Release()
if err != nil {
ui.MsgBoxError(w,
fmt.Sprintf("Error releasing process: %v", err),
"")
}
cmd = nil
}
if timer != nil { // stop the timer if we started it
timer.Stop()
timer = nil
timerChan = nil
}
status.SetText("")
}
w = ui.NewWindow("wakeup", 400, 100)
ui.AppQuit = w.Closing // treat application close as main window close
cmdbox := ui.NewLineEdit(defCmdLine)
timebox := ui.NewLineEdit(defTime)
bStart := ui.NewButton("Start")
bStop := ui.NewButton("Stop")
// a Stack to keep both buttons at the same size
btnbox := ui.NewHorizontalStack(bStart, bStop)
btnbox.SetStretchy(0)
btnbox.SetStretchy(1)
// and a Stack around that Stack to keep them at a reasonable size, with space to their right
btnbox = ui.NewHorizontalStack(btnbox, status)
// the main layout
grid := ui.NewGrid(2,
ui.NewLabel("Command"), cmdbox,
ui.NewLabel("Time"), timebox,
ui.Space(), ui.Space(), // the Space on the right will consume the window blank space
ui.Space(), btnbox)
grid.SetStretchy(2, 1) // make the Space noted above consume
grid.SetFilling(0, 1) // make the two textboxes grow horizontally
grid.SetFilling(1, 1)
w.Open(grid)
mainloop:
for {
select {
case <-w.Closing:
break mainloop
case <-bStart.Clicked:
stop() // only one alarm at a time
alarmTime, err := time.Parse(timeFmt, timebox.Text())
if err != nil {
ui.MsgBoxError(w,
fmt.Sprintf("Error parsing time %q: %v", timebox.Text(), err),
fmt.Sprintf("Make sure your time is in the form %q (without quotes).", timeFmt))
continue
}
now := time.Now()
later := bestTime(now, alarmTime)
timer = time.NewTimer(later.Sub(now))
timerChan = timer.C
status.SetText("Started")
case <-timerChan:
cmd = exec.Command("/bin/sh", "-c", "exec "+cmdbox.Text())
// keep stdin /dev/null in case user wants to run multiple alarms on one instance (TODO should I allow this program to act as a pipe?)
// keep stdout /dev/null to avoid stty mucking
cmd.Stderr = os.Stderr
err := cmd.Start()
status.SetText("Firing")
if err != nil {
ui.MsgBoxError(w,
fmt.Sprintf("Error running program: %v", err),
"")
cmd = nil
status.SetText("")
}
timer = nil
timerChan = nil
case <-bStop.Clicked:
stop()
}
}
// clean up
stop()
}