C / C++ / MFC

Richard MacCutchan wrote:

Your first message stated that you were using List Box (not List Control) and I asked you to confirm whether you actually mean List Box or List View. You now say that is it list control so I am still not sure.

#include <pre><windows.h>
#include <stdio.h>
#include <commctrl.h>

#define IDC_ListView1  10001

enum gender {male=0, female};
typedef struct person_t
{
    char *firstName;
    char *lastName;
    int   age;
    gender sex;
};

person_t peopleList[] =
{
    {"Micky", "Mouse", 61, male},
    {"Donald", "Duck", 59, male},
    {"Betty", "Boo", 34, female},
    {"Olive", "Oil", 32, female},
    {"Clark", "Kent", 29, male}
};

/*  Declare Windows procedure  */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);

/*  Make the class name into a global variable  */
char szClassName[ ] = "CodeBlocksWindowsApp";


BOOL insertListViewColumn(HWND listHwnd, char *columnText, int colIndex)
{
    CHAR szText[256];     // Temporary buffer.
    LVCOLUMN lvc;
    int iCol;

    // Initialize the LVCOLUMN structure.
    // The mask specifies that the format, width, text,
    // and subitem members of the structure are valid.
    lvc.mask = LVCF_FMT | LVCF_WIDTH | LVCF_TEXT | LVCF_SUBITEM;

    iCol = colIndex;

    lvc.iSubItem = iCol;
    lvc.pszText = columnText;
    lvc.cx = 70;               // Width of column in pixels.

    lvc.fmt = LVCFMT_LEFT;  // Left-aligned column.

    // Insert the columns into the list view.
    if (ListView_InsertColumn(listHwnd, iCol, &lvc) == -1)
        return FALSE;

    return TRUE;
}

void addListViewItem(HWND hWndListView, char  *pszText, int iItem, int iSubItem, int iImage=-1)
{
    LVITEM lvItem;

    ZeroMemory(&lvItem, sizeof(LVITEM));
    lvItem.mask	      = LVIF_TEXT;
    lvItem.iItem      = iItem;
    lvItem.iSubItem   = iSubItem;
    lvItem.pszText    = pszText;
    lvItem.cchTextMax = strlen(pszText);

    if (iImage != -1)
    {
        lvItem.mask	 |= LVIF_IMAGE;
        lvItem.iImage = iImage;
    }

    if (iSubItem == 0)
    {
        if (ListView_InsertItem(hWndListView, &lvItem) == -1)
            //throw (CWinException(_T("CListCtrl::AddItem ... LVM_INSERTITEM failed ")));
            return;
    }
    else
    {
        if (ListView_SetItem(hWndListView, &lvItem) == -1)
            //throw (CWinException(_T("CListCtrl::AddItem ... LVM_SETITEM failed ")));
            return;
    }
}

BOOL InsertPersonIntoListView(HWND hWndListView, person_t person)
{
    static int curItemIndex = 0;
    char szBuffer[256];

    addListViewItem(hWndListView, person.firstName, curItemIndex, 0, -1);
    addListViewItem(hWndListView, person.lastName, curItemIndex, 1, -1);

    sprintf(szBuffer,"%d", person.age);
    addListViewItem(hWndListView, szBuffer, curItemIndex, 2, -1);

    sprintf(szBuffer,"%s", person.sex==male?"male":"female");
    addListViewItem(hWndListView, szBuffer, curItemIndex, 3, -1);

    curItemIndex++;
}

int WINAPI WinMain (HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpszArgument, int nCmdShow)
{
    HWND hwnd;               /* This is the handle for our window */
    MSG messages;            /* Here messages to the application are saved */
    WNDCLASSEX wincl;        /* Data structure for the windowclass */

    /* The Window structure */
    wincl.hInstance = hInst;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      /* This function is called by windows */
    wincl.style = CS_DBLCLKS;                 /* Catch double-clicks */
    wincl.cbSize = sizeof (WNDCLASSEX);

    /* Use default icon and mouse-pointer */
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 /* No menu */
    wincl.cbClsExtra = 0;                      /* No extra bytes after the window class */
    wincl.cbWndExtra = 0;                      /* structure or the window instance */
    /* Use Windows's default colour as the background of the window */
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;

    /* Register the window class, and if it fails quit the program */
    if (!RegisterClassEx (&wincl))
        return 0;

    /* The class is registered, let's create the program*/
    hwnd = CreateWindowEx(0, szClassName, "ListView Sorting demo", WS_OVERLAPPEDWINDOW,
                          CW_USEDEFAULT, CW_USEDEFAULT, 426, 154,
                          HWND_DESKTOP, NULL, hInst, NULL);

    HWND btnWnd, listViewWnd;

    InitCommonControls();
    listViewWnd = CreateWindow(WC_LISTVIEW, "", WS_CHILD|WS_VISIBLE|LVS_REPORT, 5,5, 400,100, hwnd, (HMENU)IDC_ListView1, hInst, 0);

    insertListViewColumn(listViewWnd, "First Name", 0);
    insertListViewColumn(listViewWnd, "Last Name", 1);
    insertListViewColumn(listViewWnd, "Age", 2);
    insertListViewColumn(listViewWnd, "Sex", 3);

    for (int i=0; i<sizeof(peopleList)/sizeof(peopleList[0]); i++)
        InsertPersonIntoListView(listViewWnd, peopleList[i]);

    /* Make the window visible on the screen */
    ShowWindow (hwnd, nCmdShow);

    /* Run the message loop. It will run until GetMessage() returns 0 */
    while (GetMessage (&messages, NULL, 0, 0))
    {
        /* Translate virtual-key messages into character messages */
        TranslateMessage(&messages);
        /* Send message to WindowProcedure */
        DispatchMessage(&messages);
    }

    /* The program return-value is 0 - The value that PostQuitMessage() gave */
    return messages.wParam;
}


/*  This function is called by the Windows function DispatchMessage()  */

LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    int idControl;
    char szText[256];
    NM_LISTVIEW *pnmv;
    switch (message)                  /* handle the messages */
    {
    case WM_DESTROY:
        PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
        break;


    case WM_NOTIFY:
        idControl = (int)wParam;
        if (idControl == IDC_ListView1)
        {
            pnmv = (NM_LISTVIEW*) lParam;

            if (pnmv->hdr.code == LVN_COLUMNCLICK)
            {
                sprintf(szText, "Column %d clicked", pnmv->iSubItem);
                MessageBox(hwnd, szText, "ListView WM_NOTIFY message", MB_OK);
            }
//                    printf("ListView WM_NOTIFY message - column %d clicked\n", pnmv->iSubItem);
        }
        break;

    default:                      /* for messages that we don't deal with */
        return DefWindowProc (hwnd, message, wParam, lParam);
    }
    return 0;
}

MKC002 wrote:

when i pass window handle of APP->Main window in SHELLEXECUTEINFO program crash

void handle_alarm( int )
{
}
...
sgnl_action.sa_handler = handle_alarm;

extern "C" void print(char *)
{
...
}

sgnl_action.sa_handler = (void (*)(int))handle_alarm; /////warning on this line

sgnl_action.sa_handler = (void*)((int)handle_alarm); /////warning on this line

#ifdef  __cplusplus
extern "C" {
#endif

void __cdecl handle_alarm() {
    alarm_timededout_=TRUE;
    ...
    }

sgnl_action.sa_handler

#include <stdio.h>


void (*sa_handler)(int);  // function pointer takes int type
                          // arg and retuns void as we have to 
                          //typecast func handle_alarm to this type

void handle_alarm() {
    printf("helooo");
    }

 void  main(int argc, _TCHAR* argv[])
 {
       handle_alarm(); //normal call to function
       sa_handler = (void (*)(int))handle_alarm; // compatible typecast
       sa_handler(0);  // call with a function pointer
                       // as it takes one argument we have 
                       //to pass a dummy arg.
 }