# Γραμμή προόδου -ProgressBar- (C)

Monica Kochofar
monicakochofar@gmail.com 2012
Ένα γραφικό στοιχείο που δείχνει την πρόοδο οπτικά
Ελληνική μεταφραστική ομάδα GNOME
team@gnome.gr 2012-2015
Δημήτρης Σπίγγος
dmtrs32@gmail.com 2012, 2013
Μαρία Θουκιδίδου
marablack3@gmail.com 2014
Θάνος Τρυφωνίδης
tomtryf@gmail.com 2014, 2015

# Γραμμή προόδου (ProgressBar)

Αυτή η ProgressBar "γεμίζει" με ένα κλάσμα της γραμμής μέχρι να γεμίσει.

#include <gtk/gtk.h>

static gboolean fill (gpointer user_data) { GtkWidget *progress_bar = user_data;

/*Get the current progress*/ gdouble fraction; fraction = gtk_progress_bar_get_fraction (GTK_PROGRESS_BAR (progress_bar));

/*Increase the bar by 10% each time this function is called*/ fraction += 0.1;

/*Fill in the bar with the new fraction*/ gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (progress_bar), fraction);

/*Ensures that the fraction stays below 1.0*/ if (fraction < 1.0) return TRUE;

return FALSE; }

static void activate (GtkApplication *app, gpointer user_data) { GtkWidget *window; GtkWidget *progress_bar;

gdouble fraction = 0.0;

/*Create a window with a title, and a default size*/ window = gtk_application_window_new (app); gtk_window_set_title (GTK_WINDOW (window), "ProgressBar Example"); gtk_window_set_default_size (GTK_WINDOW (window), 220, 20);

/*Create a progressbar and add it to the window*/ progress_bar = gtk_progress_bar_new (); gtk_container_add (GTK_CONTAINER (window), progress_bar);

/*Fill in the given fraction of the bar. Has to be between 0.0-1.0 inclusive*/ gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (progress_bar), fraction);

/*Use the created fill function every 500 milliseconds*/ g_timeout_add (500, fill, GTK_PROGRESS_BAR (progress_bar));

gtk_widget_show_all (window); }

int main (int argc, char **argv) { GtkApplication *app; int status;

app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE); g_signal_connect (app, "activate", G_CALLBACK (activate), NULL); status = g_application_run (G_APPLICATION (app), argc, argv); g_object_unref (app);

return status; }

Σε αυτό το παράδειγμα χρησιμοποιήσαμε τα παρακάτω:

GtkApplication

GtkWindow

GtkProgressBar

G_Timeout