79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
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/* 17 july 2014 */
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#include "winapi_windows.h"
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#include "_cgo_export.h"
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void uimsgloop(void)
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{
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MSG msg;
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int res;
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for (;;) {
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SetLastError(0);
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res = GetMessage(&msg, NULL, 0, 0);
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if (res < 0)
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xpanic("error calling GetMessage()", GetLastError());
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if (res == 0) /* WM_QUIT */
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break;
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/* TODO IsDialogMessage() */
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TranslateMessage(&msg);
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DispatchMessage(&msg);
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}
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}
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void issue(void *request)
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{
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SetLastError(0);
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if (PostMessage(msgwin, msgRequested, 0, (LPARAM) request) == 0)
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xpanic("error issuing request", GetLastError());
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}
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HWND msgwin;
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#define msgwinclass L"gouimsgwin"
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static LRESULT CALLBACK msgwinproc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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switch (uMsg) {
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case WM_COMMAND:
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return forwardCommand(hwnd, uMsg, wParam, lParam);
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case msgRequested:
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xperform((void *) lParam);
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return 0;
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default:
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return DefWindowProc(hwnd, uMsg, wParam, lParam);
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}
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xmissedmsg("message-only", "msgwinproc()", uMsg);
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return 0; /* unreachable */
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}
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DWORD makemsgwin(char **errmsg)
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{
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WNDCLASS wc;
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HWND hwnd;
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ZeroMemory(&wc, sizeof (WNDCLASS));
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wc.lpfnWndProc = msgwinproc;
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wc.hInstance = hInstance;
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wc.hIcon = hDefaultIcon;
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wc.hCursor = hArrowCursor;
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wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
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wc.lpszClassName = msgwinclass;
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if (RegisterClass(&wc) == 0) {
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*errmsg = "error registering message-only window classs";
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return GetLastError();
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}
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msgwin = CreateWindowEx(
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0,
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msgwinclass, L"package ui message-only window",
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0,
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CW_USEDEFAULT, CW_USEDEFAULT,
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CW_USEDEFAULT, CW_USEDEFAULT,
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HWND_MESSAGE, NULL, hInstance, NULL);
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if (msgwin == NULL) {
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*errmsg = "error creating message-only window";
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return GetLastError();
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}
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return 0;
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}
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