1 package etk
2
3 import (
4 "image"
5
6 "code.rocketnine.space/tslocum/messeji"
7 "github.com/hajimehoshi/ebiten/v2"
8 )
9
10 type Button struct {
11 *Box
12
13 label *messeji.TextField
14
15 onSelected func() error
16 }
17
18 func NewButton(label string, onSelected func() error) *Button {
19 textColor := Style.ButtonTextColor
20 if textColor == nil {
21 textColor = Style.TextColorDark
22 }
23
24 l := messeji.NewTextField(Style.TextFont)
25 l.SetText(label)
26 l.SetForegroundColor(textColor)
27 l.SetBackgroundColor(transparent)
28 l.SetHorizontal(messeji.AlignCenter)
29 l.SetVertical(messeji.AlignCenter)
30
31 return &Button{
32 Box: NewBox(),
33 label: l,
34 onSelected: onSelected,
35 }
36 }
37
38 func (b *Button) SetRect(r image.Rectangle) {
39 b.Box.rect = r
40
41 b.label.SetRect(r)
42 }
43
44 func (b *Button) HandleMouse(cursor image.Point, pressed bool, clicked bool) (handled bool, err error) {
45 if !clicked {
46 return true, nil
47 }
48
49 b.Lock()
50 onSelected := b.onSelected
51 if onSelected == nil {
52 b.Unlock()
53 return true, nil
54 }
55 b.Unlock()
56
57 return true, onSelected()
58 }
59
60 func (b *Button) HandleKeyboard() (handled bool, err error) {
61 return false, nil
62 }
63
64 func (b *Button) Draw(screen *ebiten.Image) error {
65
66
67 screen.SubImage(b.rect).(*ebiten.Image).Fill(Style.ButtonBgColor)
68
69
70 b.label.Draw(screen)
71
72
73 const borderSize = 4
74 screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Min.Y, b.rect.Max.X, b.rect.Min.Y+borderSize)).(*ebiten.Image).Fill(Style.BorderColor)
75 screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Max.Y-borderSize, b.rect.Max.X, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
76 screen.SubImage(image.Rect(b.rect.Min.X, b.rect.Min.Y, b.rect.Min.X+borderSize, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
77 screen.SubImage(image.Rect(b.rect.Max.X-borderSize, b.rect.Min.Y, b.rect.Max.X, b.rect.Max.Y)).(*ebiten.Image).Fill(Style.BorderColor)
78
79 return nil
80 }
81
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