GTK CList

["umesh" <umesh analytica-india com>]

Hi,

 I am newbie to GTK  and C programming.Earlier i worked only on VB 6.0. So my question may be very silly some times.Please co-opearte.

In the following code I am able to bind two dimensional declared array to GtkClist Widget. But the problem arises when i dynamically allocate memory for two dimensional array and try to bind it gives error.

 

sql::SqlDatabase db("test.db", true);
sql::SqlDatabase::iterator i;
void
on_button1_clicked                     (GtkButton       *button,
                                        gpointer         user_data)
{
GtkWidget *clist;
const char** szData;
int cnt = 0;
clist = lookup_widget(GTK_WIDGET(button), "clist1");

//char *row_array[1][2];

 

char **row_matrix;
int j,k;
bool check;
 
  sql::SqlDatabase::iterator i;
  row_matrix = (char **)malloc(size * sizeof(char)); //size IS FIXED 1
  check=TRUE;
  for (i = db.begin("select * from PHI"); i != db.end(); ++i)
  {
    if(check==TRUE){
        for (cnt=0;cnt<size;cnt++){
                row_matrix[0]=(char *)malloc(i->count()*sizeof(char)); //i->count() gives number of columns in table
        }
        check=FALSE;
    }
    for (int j=0;j < i->count();j++){
        szData =i->data(); //i->data() contains value
        sprintf(&row_matrix[0][j],"%s",szData[j]); // ABLE TO PUT THE VALUE IN ALLOCATED SPACE
        //row_matrix [0][j] = g_strdup_printf ("%s",(void *)szData[j]); //THIS WORKS FINE
    }
     gtk_clist_append ((GtkCList *)clist,(char **)row_matrix[0]);//GIVES ERROR UNREFRENCED MEMORY AND TERMINATE
  }