notebook.c

开发linux应用-用gtk+和gdk开发linux图形用户界面应用－－的实例

 * Show information about the traffic on a particular 
 * day.  Dumps the information into the clist that 
 * represents the daily graph.
 *
 * This is called by the tree traverse callback!
 */
gint ShowDateInfo (gpointer key, gpointer value, gpointer data)
{
    char *strValue[4];
    typDateInfo *dateInfo;
    long *pnMax;
    char buffer0[88];
    char buffer1[88];
    char buffer2[88];

    /* --- Get info passed it --- */
    dateInfo = (typDateInfo *) value;   
    pnMax = (long *) data;

    /* --- Setup structures to populate clist --- */
    strValue[0] = buffer0;
    strValue[1] = buffer1;
    strValue[2] = buffer2;
    strValue[3] = NULL;

    /* --- Fill in the date in the first column --- */
    sprintf (strValue[0], "%02d/%02d/%4d", dateInfo->date->month, 
                                           dateInfo->date->day, 
                                           dateInfo->date->year);

    /* --- Fill in the hits and byte count --- */
    sprintf (strValue[1], "%ld", dateInfo->nHits);
    sprintf (strValue[2], "%ld", dateInfo->nSize);

    /* --- Append the data into the clist --- */
    gtk_clist_append (GTK_CLIST (dailyCList), strValue);

    /* --- Keep track of the maximum value --- */
    if (*pnMax < dateInfo->nSize) {

        *pnMax = dateInfo->nSize;
    }

    /* --- 0 => keep on trucking --- */
    return (0);
}



/*
 * ShowUserInfo
 *
 * Shows information about a user (no graphs) but keeps track 
 * of the maximum byte count so that the graphs can be generated.
 *
 * This is called as the traverse tree callback.
 */
gint ShowUserInfo (gpointer key, gpointer value, gpointer data)
{
    char *strValue[4];
    typStat *info;
    long *pnMax;
    char buffer0[88];
    char buffer1[88];
    char buffer2[88];

    /* --- Get information passed in --- */
    info = (typStat *) value;   
    pnMax = (long *) data;

    /* --- Buffers to append data --- */
    strValue[0] = buffer0;
    strValue[1] = buffer1;
    strValue[2] = buffer2;
    strValue[3] = NULL;

    /* --- Update the URL in first column --- */
    sprintf (strValue[0], "%s", info->sURL);

    /* --- Update bytes and size in next column --- */
    sprintf (strValue[1], "%ld", info->nHits);
    sprintf (strValue[2], "%ld", info->nSize);

    /* --- Add the data to the clist --- */
    gtk_clist_append (GTK_CLIST (userCList), strValue);

    /* --- Keep track of the maximum size --- */
    if (info->nSize > *pnMax) {
        *pnMax = info->nSize;
    }

    return (0);
}


/*
 * DisplayGraph
 *
 * Display the daily graph in the clist.
 *
 * Called as a Tree traverse callback.
 */
gint DisplayGraph (gpointer key, gpointer value, gpointer data)
{
    int ix;
    typGraphInfo *graphInfo = (typGraphInfo *) data;
    typDateInfo *dateInfo = (typDateInfo *) value;   

    /* --- Figure out which graph to display based on size --- */
    ix = (dateInfo->nSize * NUM_GRAPHS-1) / graphInfo->nMaxSize;

    /* --- Set the pixmap in the clist to this one --- */
    gtk_clist_set_pixmap (GTK_CLIST (graphInfo->widget), 
                          graphInfo->row, 3, pixmapGraph[ix], mask[ix]);

    /* --- Next row to display --- */
    graphInfo->row++;

    /* --- Continue... --- */
    return (0);
}



/*
 * PopulateDaily
 *
 * Populate the clist with the data from the tree. 
 * Assumes that the data in the tree has been fully
 * populated.
 */
void PopulateDaily ()
{
    gchar *strValue[4];
    long nMaxDaily;
    gchar buffer0[88];
    gchar buffer1[88];
    gchar buffer2[88];
    typGraphInfo graphInfo;

    /* --- Create the table --- */
    strValue[0] = buffer0;
    strValue[1] = buffer1;
    strValue[2] = buffer2;

    /* --- NULL - graphic is going here. --- */
    strValue[3] = NULL;
    
    /* --- If the clist has not been created yet... --- */
    if (dailyCList == NULL) {

        /* --- Create the clist --- */
        dailyCList = gtk_clist_new_with_titles (4, szDailyTitles);

        /* --- Make sure titles are being shown --- */
        gtk_clist_column_titles_show (GTK_CLIST (dailyCList));

        /* --- Set the column widths --- */
        gtk_clist_set_column_width (GTK_CLIST (dailyCList), 0, 80);
        gtk_clist_set_column_width (GTK_CLIST (dailyCList), 1, 80);
        gtk_clist_set_column_width (GTK_CLIST (dailyCList), 2, 80);

        /* --- Set the column justifications --- */
        gtk_clist_set_column_justification (GTK_CLIST (dailyCList), 
                                            0, GTK_JUSTIFY_RIGHT);
        gtk_clist_set_column_justification (GTK_CLIST (dailyCList), 
                                            1, GTK_JUSTIFY_RIGHT);
        gtk_clist_set_column_justification (GTK_CLIST (dailyCList), 
                                            2, GTK_JUSTIFY_RIGHT);

        /* --- Add the clist to the notebook page --- */
        gtk_container_add (GTK_CONTAINER (dailyPage), dailyCList);
    }

    /* --- set max to zero --- */
    nMaxDaily = 0;

    /* 
     * --- Traverse tree and display the textual information 
     *     while gathering the maximum so that the graph can
     *     be displayed
     */
    g_tree_traverse (dateTree, ShowDateInfo, G_IN_ORDER, &nMaxDaily);
 
    /* --- Information for displaying of the graph --- */
    graphInfo.nMaxSize = nMaxDaily;
    graphInfo.widget = dailyCList;
    graphInfo.row = 0;

    /* --- Re-traverse the tree and display graphs --- */
    g_tree_traverse (dateTree, DisplayGraph, G_IN_ORDER, &graphInfo);

    /* --- Show the clist now --- */
    gtk_widget_show_all (GTK_WIDGET (dailyCList));
}


/*
 * DisplayUserGraph
 *
 * Display the graph for each user. 
 * This is called from a traverse tree - it's a callback with the
 * data passed into it. 
 *
 * value - contains information about this users activity
 * data - contains information about the graph, incl. widget and max
 */
gint DisplayUserGraph (gpointer key, gpointer value, gpointer data)
{
    int ix;
    typGraphInfo *graphInfo = (typGraphInfo *) data;
    typStat *statInfo = (typStat *) value;   

    /* --- How big should the graph be? --- */
    ix = (long) (((double) statInfo->nSize * NUM_GRAPHS-1) / 
                           graphInfo->nMaxSize);

    /* --- Set the pixmap to be an appropriate size --- */
    gtk_clist_set_pixmap (GTK_CLIST (graphInfo->widget), 
                          graphInfo->row, 3, pixmapGraph[ix], mask[ix]);

    /* --- Go to the next row. --- */
    graphInfo->row++;

    return (0);
}


/*
 * PopulateUser
 *
 * Populate the user graph with the information about each users's 
 * web site traffic.  The display is created in two parts.  The 
 * first part displays the text data and computes the necessary
 * values for the second part to display the graph.
 */
void PopulateUser ()
{
    gchar *strValue[4];
    gchar buffer0[88];
    gchar buffer1[88];
    gchar buffer2[88];
    long nMax;
    typGraphInfo graphInfo;

    /* --- Buffered values --- */
    strValue[0] = buffer0;
    strValue[1] = buffer1;
    strValue[2] = buffer2;
    strValue[3] = NULL;
    
    /* --- If there's no user clist yet --- */
    if (userCList == NULL) {

        /* --- Create the clist with titles --- */
        userCList = gtk_clist_new_with_titles (4, szUserTitles);

        /* --- Show titles --- */
        gtk_clist_column_titles_show (GTK_CLIST (userCList));

        /* --- Show width of columns. --- */
        gtk_clist_set_column_width (GTK_CLIST (userCList), 0, 80);
        gtk_clist_set_column_width (GTK_CLIST (userCList), 1, 80);
        gtk_clist_set_column_width (GTK_CLIST (userCList), 2, 80);

        /* --- Justify columns --- */
        gtk_clist_set_column_justification (GTK_CLIST (userCList), 
                                            0, GTK_JUSTIFY_LEFT);
        gtk_clist_set_column_justification (GTK_CLIST (userCList), 
                                            1, GTK_JUSTIFY_RIGHT);
        gtk_clist_set_column_justification (GTK_CLIST (userCList), 
                                            2, GTK_JUSTIFY_RIGHT);

        /* --- Add clist to page. --- */
        gtk_container_add (GTK_CONTAINER (userPage), userCList);
    }

    /* --- Traverse the tree to show text info and get max --- */
    nMax = 0;
    g_tree_traverse (userTree, ShowUserInfo, G_IN_ORDER, &nMax);

    /* --- Populate structure for graphical tree traversal --- */
    graphInfo.nMaxSize = nMax;
    graphInfo.widget = userCList;
    graphInfo.row = 0;

    /* --- Display graphs --- */
    g_tree_traverse (userTree, DisplayUserGraph, G_IN_ORDER, &graphInfo);

    gtk_widget_show_all (GTK_WIDGET (userCList));
}