func MustRegisterWindowClass(className string) {
hInstance := win.GetModuleHandle(nil)
if hInstance == 0 {
panic("GetModuleHandle")
}
hIcon := win.LoadIcon(hInstance, (*uint16)(unsafe.Pointer(uintptr(ICON_MAIN))))
//hIcon, _ := NewIconFromResource(hInstance, ICON_MAIN)
if hIcon == 0 {
panic("LoadIcon")
}
hCursor := win.LoadCursor(0, (*uint16)(unsafe.Pointer(uintptr(win.IDC_ARROW))))
if hCursor == 0 {
panic("LoadCursor")
}
var wc win.WNDCLASSEX
wc.CbSize = uint32(unsafe.Sizeof(wc))
wc.LpfnWndProc = wndProc
wc.HInstance = hInstance
wc.HIcon = hIcon
wc.HCursor = hCursor
wc.HbrBackground = win.COLOR_WINDOW + 1 //COLOR_BTNFACE
wc.LpszClassName = syscall.StringToUTF16Ptr(className)
if atom := win.RegisterClassEx(&wc); atom == 0 {
panic("RegisterClassEx")
}
}
func NewIconFromResource(instance win.HINSTANCE, resId uint16) (ico win.HICON, err error) {
if ico = win.LoadIcon(instance, win.MAKEINTRESOURCE(uintptr(resId))); ico == 0 {
err = errors.New(fmt.Sprintf("Cannot load icon from resource with id %v", resId))
}
return ico, err
}
// NewIconFromResource returns a new Icon, using the specified icon resource.
func NewIconFromResource(resName string) (ic *Icon, err error) {
hInst := win.GetModuleHandle(nil)
if hInst == 0 {
err = errors.New("GetModuleHandle")
return
}
if hIcon := win.LoadIcon(hInst, syscall.StringToUTF16Ptr(resName)); hIcon == 0 {
err = errors.New("LoadIcon")
} else {
ic = &Icon{hIcon: hIcon}
}
return
}
func IconWinLogo() *Icon {
return &Icon{win.LoadIcon(0, win.MAKEINTRESOURCE(win.IDI_WINLOGO)), true}
}
func IconShield() *Icon {
return &Icon{win.LoadIcon(0, win.MAKEINTRESOURCE(win.IDI_SHIELD)), true}
}
func IconInformation() *Icon {
return &Icon{win.LoadIcon(0, win.MAKEINTRESOURCE(win.IDI_INFORMATION)), true}
}
func IconWarning() *Icon {
return &Icon{win.LoadIcon(0, win.MAKEINTRESOURCE(win.IDI_WARNING)), true}
}
func IconQuestion() *Icon {
return &Icon{win.LoadIcon(0, win.MAKEINTRESOURCE(win.IDI_QUESTION)), true}
}
func IconError() *Icon {
return &Icon{win.LoadIcon(0, win.MAKEINTRESOURCE(win.IDI_ERROR)), true}
}
func IconApplication() *Icon {
return &Icon{win.LoadIcon(0, win.MAKEINTRESOURCE(win.IDI_APPLICATION)), true}
}