84 lines
1.7 KiB
Go
84 lines
1.7 KiB
Go
package zenity
|
|
|
|
import (
|
|
"image/color"
|
|
"sync"
|
|
"unsafe"
|
|
)
|
|
|
|
var (
|
|
chooseColor = comdlg32.NewProc("ChooseColorW")
|
|
|
|
savedColors [16]uint32
|
|
colorsMutex sync.Mutex
|
|
)
|
|
|
|
func init() {
|
|
for i := range savedColors {
|
|
savedColors[i] = 0xffffff
|
|
}
|
|
}
|
|
|
|
func selectColor(opts options) (color.Color, error) {
|
|
// load custom colors
|
|
colorsMutex.Lock()
|
|
customColors := savedColors
|
|
colorsMutex.Unlock()
|
|
|
|
var args _CHOOSECOLOR
|
|
args.StructSize = uint32(unsafe.Sizeof(args))
|
|
args.CustColors = &customColors
|
|
|
|
if opts.color != nil {
|
|
args.Flags |= 0x1 // CC_RGBINIT
|
|
n := color.NRGBAModel.Convert(opts.color).(color.NRGBA)
|
|
args.RgbResult = uint32(n.R) | uint32(n.G)<<8 | uint32(n.B)<<16
|
|
}
|
|
if opts.showPalette {
|
|
args.Flags |= 0x4 // CC_PREVENTFULLOPEN
|
|
} else {
|
|
args.Flags |= 0x2 // CC_FULLOPEN
|
|
}
|
|
|
|
defer setup()()
|
|
|
|
if opts.ctx != nil || opts.title != nil {
|
|
unhook, err := hookDialogTitle(opts.ctx, opts.title)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer unhook()
|
|
}
|
|
|
|
s, _, _ := chooseColor.Call(uintptr(unsafe.Pointer(&args)))
|
|
if opts.ctx != nil && opts.ctx.Err() != nil {
|
|
return nil, opts.ctx.Err()
|
|
}
|
|
if s == 0 {
|
|
return nil, commDlgError()
|
|
}
|
|
|
|
// save custom colors back
|
|
colorsMutex.Lock()
|
|
savedColors = customColors
|
|
colorsMutex.Unlock()
|
|
|
|
r := uint8(args.RgbResult >> 0)
|
|
g := uint8(args.RgbResult >> 8)
|
|
b := uint8(args.RgbResult >> 16)
|
|
return color.RGBA{R: r, G: g, B: b, A: 255}, nil
|
|
}
|
|
|
|
// https://docs.microsoft.com/en-us/windows/win32/api/commdlg/ns-commdlg-choosecolorw-r1
|
|
type _CHOOSECOLOR struct {
|
|
StructSize uint32
|
|
Owner uintptr
|
|
Instance uintptr
|
|
RgbResult uint32
|
|
CustColors *[16]uint32
|
|
Flags uint32
|
|
CustData uintptr
|
|
FnHook uintptr
|
|
TemplateName *uint16
|
|
}
|