86 lines
2.2 KiB
C
86 lines
2.2 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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#define windowBackground ((HBRUSH) (COLOR_BTNFACE + 1))
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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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LRESULT lResult;
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data = (void *) getWindowData(hwnd, uMsg, wParam, lParam, &lResult);
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if (data == NULL)
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return lResult;
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if (sharedWndProc(hwnd, uMsg, wParam, lParam, &lResult))
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return lResult;
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switch (uMsg) {
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case WM_PRINTCLIENT:
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// the return value of this message is not documented
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// just to be safe, do this first, returning its value later
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lResult = DefWindowProcW(hwnd, uMsg, wParam, lParam);
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if (GetClientRect(hwnd, &r) == 0)
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xpanic("error getting client rect for Window in WM_PRINTCLIENT", GetLastError());
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if (FillRect((HDC) wParam, &r, windowBackground) == 0)
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xpanic("error filling WM_PRINTCLIENT DC with window background color", GetLastError());
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return lResult;
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// don't do this on WM_WINDOWPOSCHANGING; weird redraw issues will happen
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case WM_WINDOWPOSCHANGED:
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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", "windowWndProc()", 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 = windowBackground;
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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(LPWSTR 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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