Re: GTK Progress bar: assistance pls.

[vijayasarathy setsindia net]

Hi Chen,

Now that you have dug into the problem, let me post the entire code I did
in glade [this code is part of a callback file, containing a function
which will be invoked when a button is clicked.


*****************************START OF CODE CHUNK****************************

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <gtk/gtk.h>

//C Related includes
#include<unistd.h>
#include<stdlib.h>

#include "callbacks.h"
#include "interface.h"
#include "support.h"

typedef struct
{
        GtkWidget *pbar;
        gdouble fraction;

}ProgressData;

gdouble fraction=0.0;

void
on_button1_clicked                     (GtkButton       *button,
                                        gpointer         user_data)
{
        GtkWidget *wdgt_start_count;
        GtkWidget *wdgt_end_count;
        GtkWidget *wdgt_progress_bar;

        ProgressData *pdata;



        gchar *txt_start_count;
        gchar *txt_end_count;

        gint start_count = 0;
        gint end_count = 0;

        gint range;//end_count - start_count;
        gdouble fraction = 0.0;


        gint i;//Loop variable
        gint j = 0;//Loop variable

        pdata = (ProgressData *)g_malloc0(sizeof(ProgressData));

        txt_start_count = (gchar *) g_malloc0(50*sizeof(gchar));
        txt_end_count = (gchar *) g_malloc0(50*sizeof(gchar));

        /*Get start and end values from the text boxes.*/
        wdgt_start_count = lookup_widget(GTK_WIDGET(button), "entry1");
        wdgt_end_count = lookup_widget(GTK_WIDGET(button), "entry2");
        wdgt_progress_bar = lookup_widget(GTK_WIDGET(button),"progressbar1");

        txt_start_count = (gchar *)gtk_entry_get_text(GTK_ENTRY(wdgt_start_count));
        txt_end_count = (gchar *)gtk_entry_get_text(GTK_ENTRY(wdgt_end_count));

        start_count = atoi(txt_start_count);
        end_count = atoi(txt_end_count);


    //Set progress bar to the one that is currently used. Only fraction
varies.
    pdata->pbar = wdgt_progress_bar;

        pdata->fraction = 0.0;

        j = 0;

        range = end_count - start_count;
        /*I tried a timeout function which will get the value of fraction and
update regularly. It didnt work too.*/
       //g_timeout_add (100, progress_timeout, pdata);

        for(i=start_count;i<end_count;i++)
        {
                //g_print("i = (%d)\n",i);
                while(j<100000)//To kill time, keep counting until a lakh
                        j++;
                j = 0;//Make j 0 for the next loop.
                //sleep(2);
                pdata->fraction = (gdouble)i/(gdouble)(range);

                fflush(NULL);
                //gtk_progress_bar_pulse (GTK_PROGRESS_BAR (pdata->pbar));
                //gtk_progress_bar_set_pulse_step(GTK_PROGRESS_BAR
(pdata->pbar),pdata->fraction );
                gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (pdata->pbar),
pdata->fraction);
        }//End for i = start_count to end_count
        //Call function periodically
        /* Add a timer callback to update the value of the progress bar */

*************************END OF CODE CHUNK*********************************

This is the portion of the code that I am talking about. Note that I am
calculating the fraction and then updating the progress bar then and
there, but nothing happens. I have also typecasted i to gdouble for
getting fraction calculated accurately.


Please help.

On Mon, January 7, 2008 1:01 pm, Bin Chen wrote:
>

> å?¨ 2008-01-07ä¸?ç?? 13:04 +0530ï¼?vijayasarathy setsindia netå??é??ï¼?
> > Hey Bin Chen[or how do I call you :-)],
> >
> >
> > First of all, thank you very much for your instant reply.
> >
> >
> > Let me give a simple pseudo-code explaining my problem. Please see what
> > I
> > can do with this.
> >
> > Program Goal: Do work w1 "iterations" number of times, and keep showing
> >  progress of this whole work regularly.
> >
> > Pseudo code:
> >
> >
> > for(i=0;i<iterations;i++) {
> > do w1; fraction = (i+1)/iterations; Update progress bar using this
> > fraction. }
> There are somthing wrong with your programe. I use
> gtk_progress_bar_set_fraction() can properly update the bar. Be noticed
> that the number is in float number, if you ignore this there will only be
> two numbers in integer, 0 and 1.
>
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Vijayasarathy
Senior Research Associate
SETS

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DISCLAIMER 
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Any use,distribution,copying or disclosure by any other person is strictly prohibited. If you have received 
this transmission in error please notify SETS immediately either by replying to this e-mail or by telephone 
+91-44-28205655 and then delete this e-mail. The sender does not accept any responsibility for any damage 
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attachments (if any) prior to opening them. 
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