This repository has been archived by the owner on Aug 27, 2020. It is now read-only.
forked from rivo/tview
/
main.go
70 lines (62 loc) · 1.75 KB
/
main.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
// Demo code which illustrates how to implement your own primitive.
package main
import (
"fmt"
"maunium.net/go/tcell"
"github.com/rivo/tview"
)
// RadioButtons implements a simple primitive for radio button selections.
type RadioButtons struct {
*tview.Box
options []string
currentOption int
}
// NewRadioButtons returns a new radio button primitive.
func NewRadioButtons(options []string) *RadioButtons {
return &RadioButtons{
Box: tview.NewBox(),
options: options,
}
}
// Draw draws this primitive onto the screen.
func (r *RadioButtons) Draw(screen tcell.Screen) {
r.Box.Draw(screen)
x, y, width, height := r.GetInnerRect()
for index, option := range r.options {
if index >= height {
break
}
radioButton := "\u25ef" // Unchecked.
if index == r.currentOption {
radioButton = "\u25c9" // Checked.
}
line := fmt.Sprintf(`%s[white] %s`, radioButton, option)
tview.Print(screen, line, x, y+index, width, tview.AlignLeft, tcell.ColorYellow)
}
}
// InputHandler returns the handler for this primitive.
func (r *RadioButtons) InputHandler() func(event *tcell.EventKey, setFocus func(p tview.Primitive)) {
return r.WrapInputHandler(func(event *tcell.EventKey, setFocus func(p tview.Primitive)) {
switch event.Key() {
case tcell.KeyUp:
r.currentOption--
if r.currentOption < 0 {
r.currentOption = 0
}
case tcell.KeyDown:
r.currentOption++
if r.currentOption >= len(r.options) {
r.currentOption = len(r.options) - 1
}
}
})
}
func main() {
radioButtons := NewRadioButtons([]string{"Lions", "Elephants", "Giraffes"})
radioButtons.SetBorder(true).
SetTitle("Radio Button Demo").
SetRect(0, 0, 30, 5)
if err := tview.NewApplication().SetRoot(radioButtons, false).Run(); err != nil {
panic(err)
}
}