tg/cmd/test/incdec.go

package main

import (
	"surdeus.su/core/tg"
	"fmt"
)

// A simple example widget to show
// how to store and get session data values
// and working with dynamic panels.
var IncDecWidget = tg.RenderFunc(func(c tg.Context) tg.UI {
	const format = "Press the buttons" +
		"to increment and decrement.\n" +
		"Current counter value = %d"
	d := ExtractSessionData(c)
	return tg.UI{
		tg.Messagef(format, d.Counter).Panel(
			c,
			tg.PanelFunc(func(
				panel *tg.PanelCompo,
				c tg.Context,
			) []tg.ButtonRow {
				d := ExtractSessionData(c)
				row := tg.ButtonRow{}
				if d.Counter != -5 {
					row = append(
						row,
						tg.Buttonf(
							"-",
						).WithAction(tg.Func(func(c tg.Context){
							d.Counter--
							panel.Text = fmt.Sprintf(format, d.Counter)
							c.Update(panel)
						})),
					)
				}
				if d.Counter != +5 {
					row = append(
						row,
						tg.Buttonf(
							"+",
						).WithAction(tg.Func(func(c tg.Context){
							d.Counter++
							panel.Text = fmt.Sprintf(format, d.Counter)
							c.Update(panel)
						})),
					)
				}

				return []tg.ButtonRow{row}
			}),
		),
		tg.Messagef("Use the reply keyboard to get back").Reply(
			BackKeyboard.Reply(),
		),
	}
})