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
|
// 12 december 2015
package ui
import (
"unsafe"
)
// #include "pkgui.h"
import "C"
// ColorButton is a Control that represents a button that the user can
// click to select a color.
type ColorButton struct {
ControlBase
b *C.uiColorButton
onChanged func(*ColorButton)
}
// NewColorButton creates a new ColorButton.
func NewColorButton() *ColorButton {
b := new(ColorButton)
b.b = C.uiNewColorButton()
C.pkguiColorButtonOnChanged(b.b)
b.ControlBase = NewControlBase(b, uintptr(unsafe.Pointer(b.b)))
return b
}
// Color returns the color currently selected in the ColorButton.
// Colors are not alpha-premultiplied.
// TODO rename b or bl
func (b *ColorButton) Color() (r, g, bl, a float64) {
c := C.pkguiNewColorDoubles()
defer C.pkguiFreeColorDoubles(c)
C.uiColorButtonColor(b.b, c.r, c.g, c.b, c.a)
return float64(*(c.r)), float64(*(c.g)), float64(*(c.b)), float64(*(c.a))
}
// SetColor sets the currently selected color in the ColorButton.
// Colors are not alpha-premultiplied.
// TODO rename b or bl
func (b *ColorButton) SetColor(r, g, bl, a float64) {
C.uiColorButtonSetColor(b.b, C.double(r), C.double(g), C.double(bl), C.double(a))
}
// OnChanged registers f to be run when the user changes the
// currently selected color in the ColorButton. Only one function
// can be registered at a time.
func (b *ColorButton) OnChanged(f func(*ColorButton)) {
b.onChanged = f
}
//export pkguiDoColorButtonOnChanged
func pkguiDoColorButtonOnChanged(bb *C.uiColorButton, data unsafe.Pointer) {
b := ControlFromLibui(uintptr(unsafe.Pointer(bb))).(*ColorButton)
if b.onChanged != nil {
b.onChanged(b)
}
}
|
