49 lines
1.4 KiB
Go
49 lines
1.4 KiB
Go
|
// 12 july 2014
|
||
|
|
|
||
|
|
package ui
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"syscall"
|
||
|
|
"unsafe"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TODO get rid of this when we actually use s_POINT somewhere
|
||
|
|
var dummyToFoolwinconstgen s_POINT
|
||
|
|
|
||
|
|
func getWindowText(hwnd uintptr) 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 := f_SendMessageW(hwnd, c_WM_GETTEXTLENGTH, 0, 0)
|
||
|
|
buf := make([]uint16, int(n + 1))
|
||
|
|
if f_SendMessageW(hwnd, c_WM_GETTEXT,
|
||
|
|
t_WPARAM(n + 1), t_LPARAM(uintptr(unsafe.Pointer(&buf[0])))) != n {
|
||
|
|
panic(fmt.Errorf("WM_GETTEXT did not copy exactly %d characters out", n))
|
||
|
|
}
|
||
|
|
return syscall.UTF16ToString(buf)
|
||
|
|
}
|
||
|
|
|
||
|
|
func setWindowText(hwnd uintptr, text string, errors []t_LRESULT) {
|
||
|
|
res := f_SendMessageW(hwnd, c_WM_SETTEXT,
|
||
|
|
0, t_LPARAM(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(text)))))
|
||
|
|
for _, err := range errors {
|
||
|
|
if res == err {
|
||
|
|
panic(fmt.Errorf("WM_SETTEXT failed; error code %d", res))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func updateWindow(hwnd uintptr, caller string) {
|
||
|
|
res, err := f_UpdateWindow(hwnd)
|
||
|
|
if res == 0 {
|
||
|
|
panic(fmt.Errorf("error calling UpdateWindow() from %s: %v", caller, err))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func storelpParam(hwnd uintptr, lParam t_LPARAM) {
|
||
|
|
var cs *s_CREATESTRUCTW
|
||
|
|
|
||
|
|
cs = (*s_CREATESTRUCTW)(unsafe.Pointer(uintptr(lParam)))
|
||
|
|
f_SetWindowLongPtrW(hwnd, c_GWLP_USERDATA, cs.lpCreateParams)
|
||
|
|
}
|