login-app: Use a pure-Go tty interface instead of curses

pkg/login-app/cmd/dialog-errmsg.go

@@ -0,0 +1,85 @@
+package main
+
+import (
+	ui "github.com/VladimirMarkelov/clui"
+	term "github.com/nsf/termbox-go"
+)
+
+type ErrMsgDialog struct {
+	View *ui.Window
+
+	result      int
+	beforeClose func()
+	onClose     func()
+}
+
+func CreateErrMsgDialog(title string, err error) *ErrMsgDialog {
+	dlg := new(ErrMsgDialog)
+
+	sWidth, sHeight := ui.ScreenSize()
+	wWidth, wHeight := 60, 10
+	dlg.View = ui.AddWindow(sWidth/2-wWidth/2, sHeight/2-wHeight/2, wWidth, wHeight, title)
+	ui.WindowManager().BeginUpdate()
+	defer ui.WindowManager().EndUpdate()
+
+	dlg.View.SetModal(true)
+	dlg.View.SetSizable(false)
+	dlg.View.SetTitleButtons(ui.ButtonDefault)
+	dlg.View.SetPack(ui.Vertical)
+
+	textfrm := ui.CreateFrame(dlg.View, 1, 1, ui.BorderNone, ui.Fixed)
+	textfrm.SetPaddings(1, 1)
+	textfrm.SetPack(ui.Vertical)
+	textfrm.SetGaps(2, 1)
+
+	lbl := ui.CreateLabel(textfrm, ui.AutoSize, ui.AutoSize, "An error occurs:", ui.Fixed)
+	lbl.SetTextColor(ui.ColorRedBold)
+
+	tv := ui.CreateTextView(textfrm, ui.AutoSize, 4, ui.Fixed)
+	tv.SetWordWrap(true)
+	tv.SetText([]string{err.Error()})
+	tv.SetTextColor(ui.ColorWhite)
+	tv.SetBackColor(ui.ColorBlack)
+
+	ui.CreateLabel(textfrm, ui.AutoSize, ui.AutoSize, "Please try again.", ui.Fixed)
+
+	btnOk := ui.CreateButton(textfrm, 20, 4, "Ok", 1)
+
+	btnOk.OnClick(func(ev ui.Event) {
+		if dlg.beforeClose != nil {
+			dlg.beforeClose()
+		}
+
+		ui.WindowManager().DestroyWindow(dlg.View)
+		ui.WindowManager().BeginUpdate()
+
+		closeFunc := dlg.onClose
+		ui.WindowManager().EndUpdate()
+		if closeFunc != nil {
+			closeFunc()
+		}
+	})
+
+	dlg.View.OnKeyDown(func(ev ui.Event, data interface{}) bool {
+		if ev.Key == term.KeyEnter {
+			if dlg.beforeClose != nil {
+				dlg.beforeClose()
+			}
+
+			ui.WindowManager().DestroyWindow(dlg.View)
+			ui.WindowManager().BeginUpdate()
+
+			closeFunc := dlg.onClose
+			ui.WindowManager().EndUpdate()
+			if closeFunc != nil {
+				closeFunc()
+			}
+			return true
+		}
+		return false
+	}, nil)
+
+	ui.ActivateControl(dlg.View, btnOk)
+
+	return dlg
+}