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https://github.com/wailsapp/wails.git
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48254b73e5
* Add Windows version helper * Initial theme support * Support custom themes * Update docs * Honour HighContrast theme. Remove import "C". Refactor * Small refactor * Support inactive theme * Update Docs
93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
package win32
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import (
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"golang.org/x/sys/windows/registry"
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"unsafe"
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)
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type DWMWINDOWATTRIBUTE int32
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const DwmwaUseImmersiveDarkModeBefore20h1 DWMWINDOWATTRIBUTE = 19
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const DwmwaUseImmersiveDarkMode DWMWINDOWATTRIBUTE = 20
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const DwmwaBorderColor DWMWINDOWATTRIBUTE = 34
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const DwmwaCaptionColor DWMWINDOWATTRIBUTE = 35
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const DwmwaTextColor DWMWINDOWATTRIBUTE = 36
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const SPI_GETHIGHCONTRAST = 0x0042
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const HCF_HIGHCONTRASTON = 0x00000001
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func dwmSetWindowAttribute(hwnd uintptr, dwAttribute DWMWINDOWATTRIBUTE, pvAttribute unsafe.Pointer, cbAttribute uintptr) {
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ret, _, err := procDwmSetWindowAttribute.Call(
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hwnd,
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uintptr(dwAttribute),
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uintptr(pvAttribute),
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cbAttribute)
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if ret != 0 {
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_ = err
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// println(err.Error())
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}
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}
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func SupportsThemes() bool {
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// We can't support Windows versions before 17763
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return IsWindowsVersionAtLeast(10, 0, 17763)
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}
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func SupportsCustomThemes() bool {
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return IsWindowsVersionAtLeast(10, 0, 17763)
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}
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func SetTheme(hwnd uintptr, useDarkMode bool) {
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if IsWindowsVersionAtLeast(10, 0, 17763) {
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attr := DwmwaUseImmersiveDarkModeBefore20h1
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if IsWindowsVersionAtLeast(10, 0, 18985) {
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attr = DwmwaUseImmersiveDarkMode
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}
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dwmSetWindowAttribute(hwnd, attr, unsafe.Pointer(&useDarkMode), unsafe.Sizeof(&useDarkMode))
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}
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}
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func SetTitleBarColour(hwnd uintptr, titleBarColour int32) {
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dwmSetWindowAttribute(hwnd, DwmwaCaptionColor, unsafe.Pointer(&titleBarColour), unsafe.Sizeof(titleBarColour))
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}
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func SetTitleTextColour(hwnd uintptr, titleTextColour int32) {
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dwmSetWindowAttribute(hwnd, DwmwaTextColor, unsafe.Pointer(&titleTextColour), unsafe.Sizeof(titleTextColour))
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}
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func SetBorderColour(hwnd uintptr, titleBorderColour int32) {
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dwmSetWindowAttribute(hwnd, DwmwaBorderColor, unsafe.Pointer(&titleBorderColour), unsafe.Sizeof(titleBorderColour))
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}
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func IsCurrentlyDarkMode() bool {
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key, err := registry.OpenKey(registry.CURRENT_USER, `SOFTWARE\Microsoft\Windows\CurrentVersion\Themes\Personalize`, registry.QUERY_VALUE)
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if err != nil {
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return false
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}
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defer key.Close()
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AppsUseLightTheme, _, err := key.GetIntegerValue("AppsUseLightTheme")
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if err != nil {
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return false
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}
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return AppsUseLightTheme == 0
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}
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type highContrast struct {
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CbSize uint32
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DwFlags uint32
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LpszDefaultScheme *int16
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}
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func IsCurrentlyHighContrastMode() bool {
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var result highContrast
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result.CbSize = uint32(unsafe.Sizeof(result))
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res, _, err := procSystemParametersInfo.Call(SPI_GETHIGHCONTRAST, uintptr(result.CbSize), uintptr(unsafe.Pointer(&result)), 0)
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if res == 0 {
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_ = err
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return false
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}
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return result.DwFlags&HCF_HIGHCONTRASTON == HCF_HIGHCONTRASTON
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}
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