/
window_windows.go
43 lines (35 loc) · 1.11 KB
/
window_windows.go
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package glfw
import (
"runtime"
"syscall"
"unsafe"
"fyne.io/fyne/v2"
"golang.org/x/sys/windows/registry"
)
func (w *window) setDarkMode() {
if runtime.GOOS == "windows" {
hwnd := w.view().GetWin32Window()
dark := isDark()
dwm := syscall.NewLazyDLL("dwmapi.dll")
setAtt := dwm.NewProc("DwmSetWindowAttribute")
ret, _, err := setAtt.Call(uintptr(unsafe.Pointer(hwnd)), // window handle
20, // DWMWA_USE_IMMERSIVE_DARK_MODE
uintptr(unsafe.Pointer(&dark)), // on or off
8) // sizeof(darkMode)
if ret != 0 { // err is always non-nil, we check return value
fyne.LogError("Failed to set dark mode", err)
}
}
}
func isDark() bool {
k, err := registry.OpenKey(registry.CURRENT_USER, `SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize`, registry.QUERY_VALUE)
if err != nil { // older version of Windows will not have this key
return false
}
defer k.Close()
useLight, _, err := k.GetIntegerValue("AppsUseLightTheme")
if err != nil { // older version of Windows will not have this value
return false
}
return useLight == 0
}