49 lines
1.4 KiB
Go
49 lines
1.4 KiB
Go
// 12 july 2014
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package ui
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import (
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"fmt"
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"syscall"
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"unsafe"
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)
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// TODO get rid of this when we actually use s_POINT somewhere
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var dummyToFoolwinconstgen s_POINT
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func getWindowText(hwnd uintptr) string {
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// WM_GETTEXTLENGTH and WM_GETTEXT return the count /without/ the terminating null character
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// but WM_GETTEXT expects the buffer size handed to it to /include/ the terminating null character
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n := f_SendMessageW(hwnd, c_WM_GETTEXTLENGTH, 0, 0)
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buf := make([]uint16, int(n + 1))
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if f_SendMessageW(hwnd, c_WM_GETTEXT,
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t_WPARAM(n + 1), t_LPARAM(uintptr(unsafe.Pointer(&buf[0])))) != n {
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panic(fmt.Errorf("WM_GETTEXT did not copy exactly %d characters out", n))
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}
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return syscall.UTF16ToString(buf)
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}
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func setWindowText(hwnd uintptr, text string, errors []t_LRESULT) {
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res := f_SendMessageW(hwnd, c_WM_SETTEXT,
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0, t_LPARAM(uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(text)))))
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for _, err := range errors {
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if res == err {
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panic(fmt.Errorf("WM_SETTEXT failed; error code %d", res))
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}
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}
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}
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func updateWindow(hwnd uintptr, caller string) {
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res, err := f_UpdateWindow(hwnd)
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if res == 0 {
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panic(fmt.Errorf("error calling UpdateWindow() from %s: %v", caller, err))
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}
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}
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func storelpParam(hwnd uintptr, lParam t_LPARAM) {
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var cs *s_CREATESTRUCTW
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cs = (*s_CREATESTRUCTW)(unsafe.Pointer(uintptr(lParam)))
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f_SetWindowLongPtrW(hwnd, c_GWLP_USERDATA, cs.lpCreateParams)
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}
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