Function MapWndProc

win/win32/mhmap.c:549–664

map window procedure */

/* map window procedure */
LRESULT CALLBACK
MapWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    PNHMapWindow data;

    data = (PNHMapWindow) GetWindowLongPtr(hWnd, GWLP_USERDATA);
    switch (message) {
    case WM_CREATE:
        onCreate(hWnd, wParam, lParam);
        break;

    case WM_MSNH_COMMAND:
        onMSNHCommand(hWnd, wParam, lParam);
        break;

    case WM_PAINT:
        onPaint(hWnd);
        break;

    case WM_SETFOCUS:
        /* transfer focus back to the main window */
        SetFocus(GetNHApp()->hMainWnd);
        break;

    case WM_HSCROLL:
        onMSNH_HScroll(hWnd, wParam, lParam);
        break;

    case WM_VSCROLL:
        onMSNH_VScroll(hWnd, wParam, lParam);
        break;

    case WM_SIZE: {
        RECT rt;
        SIZE size;

        if (data->bFitToScreenMode) {
            size.cx = LOWORD(lParam);
            size.cy = HIWORD(lParam);
        } else {
            /* mapping factor is unchanged we just need to adjust scroll bars
             */
            size.cx = data->xFrontTile * COLNO;
            size.cy = data->yFrontTile * ROWNO;
        }
        mswin_map_layout(hWnd, &size);

        /* update window placement */
        GetWindowRect(hWnd, &rt);
        ScreenToClient(GetNHApp()->hMainWnd, (LPPOINT) &rt);
        ScreenToClient(GetNHApp()->hMainWnd, ((LPPOINT) &rt) + 1);
        mswin_update_window_placement(NHW_MAP, &rt);
    } break;

    case WM_MOVE: {
        RECT rt;
        GetWindowRect(hWnd, &rt);
        ScreenToClient(GetNHApp()->hMainWnd, (LPPOINT) &rt);