77 lines
1.5 KiB
Go
77 lines
1.5 KiB
Go
package zenity
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import (
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"image/color"
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"runtime"
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"sync"
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"unsafe"
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)
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var (
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chooseColor = comdlg32.NewProc("ChooseColorW")
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savedColors = [16]uint32{}
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colorsMutex sync.Mutex
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)
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func init() {
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for i := range savedColors {
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savedColors[i] = 0xffffff
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}
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}
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func SelectColor(options ...Option) (color.Color, error) {
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opts := optsParse(options)
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// load custom colors
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colorsMutex.Lock()
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customColors := savedColors
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colorsMutex.Unlock()
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var args _CHOOSECOLORW
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args.StructSize = uint32(unsafe.Sizeof(args))
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args.CustColors = &customColors
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if opts.color != nil {
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args.Flags |= 0x1 // CC_RGBINIT
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n := color.NRGBAModel.Convert(opts.color).(color.NRGBA)
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args.RgbResult = uint32(n.R) | (uint32(n.G) << 8) | (uint32(n.B) << 16)
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}
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if opts.palette {
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args.Flags |= 4 // CC_PREVENTFULLOPEN
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} else {
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args.Flags |= 2 // CC_FULLOPEN
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}
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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n, _, _ := chooseColor.Call(uintptr(unsafe.Pointer(&args)))
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// save custom colors back
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colorsMutex.Lock()
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savedColors = customColors
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colorsMutex.Unlock()
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if n == 0 {
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return nil, commDlgError()
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}
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r := uint8(args.RgbResult >> 0)
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g := uint8(args.RgbResult >> 8)
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b := uint8(args.RgbResult >> 16)
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return color.RGBA{R: r, G: g, B: b, A: 255}, nil
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}
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type _CHOOSECOLORW struct {
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StructSize uint32
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Owner uintptr
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Instance uintptr
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RgbResult uint32
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CustColors *[16]uint32
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Flags uint32
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CustData uintptr
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FnHook uintptr
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TemplateName *uint16
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}
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