blob: a80ee2ead82ccd9acc24349fcdde0c396f8ae4e9 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
// 12 july 2014
package ui
import (
"fmt"
"syscall"
"unsafe"
)
// #include "winapi_windows.h"
import "C"
//export xpanic
func xpanic(msg *C.char, lasterr C.DWORD) {
panic(fmt.Errorf("%s: %s", C.GoString(msg), syscall.Errno(lasterr)))
}
//export xmissedmsg
func xmissedmsg(purpose *C.char, f *C.char, uMsg C.UINT) {
panic(fmt.Errorf("%s window procedure message %d does not return a value (bug in %s)", C.GoString(purpose), uMsg, C.GoString(f)))
}
func toUTF16(s string) C.LPCWSTR {
return C.LPCWSTR(unsafe.Pointer(syscall.StringToUTF16Ptr(s)))
}
func getWindowText(hwnd C.HWND) string {
// WM_GETTEXTLENGTH and WM_GETTEXT return the count /without/ the terminating null character
// but WM_GETTEXT expects the buffer size handed to it to /include/ the terminating null character
n := C.getWindowTextLen(hwnd)
buf := make([]uint16, int(n + 1))
C.getWindowText(hwnd, C.WPARAM(n),
C.LPCWSTR(unsafe.Pointer(&buf[0])))
return syscall.UTF16ToString(buf)
}
|
