82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/* 17 july 2014 */
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#include "winapi_windows.h"
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#include "_cgo_export.h"
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#define windowclass L"gouiwindow"
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static LRESULT CALLBACK windowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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void *data;
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RECT r;
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data = (void *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
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if (data == NULL) {
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/* the lpParam is available during WM_NCCREATE and WM_CREATE */
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if (uMsg == WM_NCCREATE) {
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storelpParam(hwnd, lParam);
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data = (void *) GetWindowLongPtrW(hwnd, GWLP_USERDATA);
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storeWindowHWND(data, hwnd);
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}
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/* act as if we're not ready yet, even during WM_NCCREATE (nothing important to the switch statement below happens here anyway) */
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return DefWindowProcW(hwnd, uMsg, wParam, 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 WM_SIZE:
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if (GetClientRect(hwnd, &r) == 0)
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xpanic("error getting client rect for Window in WM_SIZE", GetLastError());
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windowResize(data, &r);
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return 0;
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case WM_CLOSE:
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windowClosing(data);
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return 0;
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default:
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return DefWindowProcW(hwnd, uMsg, wParam, lParam);
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}
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xmissedmsg("Window", "windowWinProc()", uMsg);
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return 0; /* unreached */
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}
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DWORD makeWindowWindowClass(char **errmsg)
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{
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WNDCLASSW wc;
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ZeroMemory(&wc, sizeof (WNDCLASSW));
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wc.lpfnWndProc = windowWndProc;
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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 = windowclass;
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if (RegisterClassW(&wc) == 0) {
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*errmsg = "error registering Window window class";
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return GetLastError();
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}
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return 0;
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}
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HWND newWindow(LPCWSTR title, int width, int height, void *data)
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{
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HWND hwnd;
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hwnd = CreateWindowExW(
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0,
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windowclass, title,
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WS_OVERLAPPEDWINDOW,
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CW_USEDEFAULT, CW_USEDEFAULT,
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width, height,
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NULL, NULL, hInstance, data);
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if (hwnd == NULL)
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xpanic("Window creation failed", GetLastError());
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return hwnd;
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}
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void windowClose(HWND hwnd)
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{
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if (DestroyWindow(hwnd) == 0)
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xpanic("error destroying window", GetLastError());
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}
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