/
checkbox.go
131 lines (116 loc) · 2.83 KB
/
checkbox.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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
package nanogui
import (
"github.com/shibukawa/glfw"
"github.com/shibukawa/nanovgo"
)
type CheckBox struct {
WidgetImplement
caption string
pushed bool
checked bool
callback func(bool)
}
func NewCheckBox(parent Widget, caption string) *CheckBox {
if caption == "" {
caption = "Untitled"
}
checkBox := &CheckBox{
caption: caption,
}
InitWidget(checkBox, parent)
return checkBox
}
func (c *CheckBox) Caption() string {
return c.caption
}
func (c *CheckBox) SetCaption(caption string) {
c.caption = caption
}
func (c *CheckBox) Checked() bool {
return c.checked
}
func (c *CheckBox) SetChecked(checked bool) {
c.checked = checked
}
func (c *CheckBox) Pushed() bool {
return c.pushed
}
func (c *CheckBox) SetPushed(pushed bool) {
c.pushed = pushed
}
func (c *CheckBox) SetCallback(callback func(bool)) {
c.callback = callback
}
func (c *CheckBox) MouseButtonEvent(self Widget, x, y int, button glfw.MouseButton, down bool, modifier glfw.ModifierKey) bool {
c.WidgetImplement.MouseButtonEvent(self, x, y, button, down, modifier)
if !c.enabled {
return false
}
if button == glfw.MouseButton1 {
if down {
c.pushed = true
} else if c.pushed {
if c.Contains(x, y) {
c.checked = !c.checked
if c.callback != nil {
c.callback(c.checked)
}
}
c.pushed = false
}
return true
}
return false
}
func (c *CheckBox) PreferredSize(self Widget, ctx *nanovgo.Context) (int, int) {
fw, fh := c.FixedSize()
if fw > 0 || fh > 0 {
return fw, fh
}
fontSize := float32(c.FontSize())
ctx.SetFontSize(fontSize)
ctx.SetFontFace(c.theme.FontNormal)
w, _ := ctx.TextBounds(0, 0, c.caption)
return int(w + 1.7*fontSize), int(fontSize * 1.3)
}
func (c *CheckBox) Draw(self Widget, ctx *nanovgo.Context) {
cx := float32(c.x)
cy := float32(c.y)
ch := float32(c.h)
c.WidgetImplement.Draw(self, ctx)
fontSize := float32(c.FontSize())
ctx.SetFontSize(fontSize)
ctx.SetFontFace(c.theme.FontNormal)
if c.enabled {
ctx.SetFillColor(c.theme.TextColor)
} else {
ctx.SetFillColor(c.theme.DisabledTextColor)
}
ctx.SetTextAlign(nanovgo.AlignLeft | nanovgo.AlignMiddle)
ctx.Text(cx+1.2*ch+5, cy+ch*0.5, c.caption)
var bgAlpha uint8
if c.pushed {
bgAlpha = 100
} else {
bgAlpha = 32
}
bgPaint := nanovgo.BoxGradient(cx+1.5, cy+1.5, ch-2.0, ch-2.0, 3, 3, nanovgo.MONO(0, bgAlpha), nanovgo.MONO(0, 180))
ctx.BeginPath()
ctx.RoundedRect(cx+1.0, cy+1.0, ch-2.0, ch-2.0, 3)
ctx.SetFillPaint(bgPaint)
ctx.Fill()
if c.checked {
ctx.SetFontSize(ch)
ctx.SetFontFace(c.theme.FontIcons)
if c.enabled {
ctx.SetFillColor(c.theme.IconColor)
} else {
ctx.SetFillColor(c.theme.DisabledTextColor)
}
ctx.SetTextAlign(nanovgo.AlignCenter | nanovgo.AlignMiddle)
ctx.Text(cx+ch*0.5+1.0, cy+ch*0.5, string([]rune{rune(IconCheck)}))
}
}
func (c *CheckBox) String() string {
return c.StringHelper("CheckBox", c.caption)
}