// MustRegisterWindowClass registers the specified window class.
//
// MustRegisterWindowClass must be called once for every window type that is not
// based on any system provided control, before calling InitChildWidget or
// InitWidget. Calling MustRegisterWindowClass twice with the same className
// results in a panic.
func MustRegisterWindowClass(className string) {
if registeredWindowClasses[className] {
panic("window class already registered")
}
hInst := win.GetModuleHandle(nil)
if hInst == 0 {
panic("GetModuleHandle")
}
hIcon := win.LoadIcon(0, (*uint16)(unsafe.Pointer(uintptr(win.IDI_APPLICATION))))
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 = defaultWndProcPtr
wc.HInstance = hInst
wc.HIcon = hIcon
wc.HCursor = hCursor
wc.HbrBackground = win.COLOR_BTNFACE + 1
wc.LpszClassName = syscall.StringToUTF16Ptr(className)
if atom := win.RegisterClassEx(&wc); atom == 0 {
panic("RegisterClassEx")
}
registeredWindowClasses[className] = true
}
func CursorSize() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_SIZE))}
}
func CursorIcon() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_ICON))}
}
func CursorHelp() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_HELP))}
}
func CursorAppStarting() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_APPSTARTING))}
}
func CursorHand() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_HAND))}
}
func CursorNo() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_NO))}
}
func CursorUpArrow() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_UPARROW))}
}
func CursorCross() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_CROSS))}
}
func CursorWait() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_WAIT))}
}
func CursorIBeam() Cursor {
return stockCursor{win.LoadCursor(0, win.MAKEINTRESOURCE(win.IDC_IBEAM))}
}