Use of gtk progressbar progress bar Control

# Include <gtk/gtk. h> typedef struct _ ProgressData {GtkWidget * window; GtkWidget * pbar; int timer; gboolean activity_mode;} ProgressData;/* update the progress bar, in this way, you can see the movement of the progress bar */gint progress_timeout (gpointer data) {ProgressData * pdata = (ProgressData *) data; gdouble new_val; if (pdata-> activity_mode) gtk_progress_bar_pulse (GTK_PROGRESS_BAR (pdata-> pbar); else {/* calculate the progress bar value using the value range set in the adjustment object */new_val = gtk_progress_bar_get _ Fraction (GTK_PROGRESS_BAR (pdata-> pbar) + 0.01; if (new_val> 1.0) new_val = 0.0; /* set the new value of the progress bar */gtk_progress_bar_set_fraction (GTK_PROGRESS_BAR (pdata-> pbar), new_val);}/* This is a timeout function and returns TRUE, in this way, it can continue to be called */return TRUE;}/* callback function, switch to the text display on your chute on the progress bar */void toggle_show_text (GtkWidget * widget, progressData * pdata) {const gchar * text; text = gtk_progress_bar_get_text (GTK_PROGRESS_BAR (pdata-> pbar); if (tex T & * text) gtk_progress_bar_set_text (GTK_PROGRESS_BAR (pdata-> pbar), ""); Progress (GTK_PROGRESS_BAR (pdata-> pbar), "some text ");} /* callback function, switch the activity mode of the progress bar */void toggle_activity_mode (GtkWidget * widget, ProgressData * pdata) {pdata-> activity_mode =! Pdata-> activity_mode; if (pdata-> activity_mode) gtk_progress_bar_pulse (GTK_PROGRESS_BAR (pdata-> pbar); Progress (GTK_PROGRESS_BAR (pdata-> pbar), 0.0 );} /* callback function, switch the direction of the progress bar */void toggle_orientation (GtkWidget * widget, ProgressData * pdata) {switch (gtk_progress_bar_get_orientation (GTK_PROGRESS_BAR (pdata-> pbar ))) {case GTK_PROGRESS_LEFT_TO_RIGHT: gtk_progress_bar_set_orientation (GTK_PROGRESS_BAR (pdata-> pbar), GTK_PROGRESS_RIGHT_TO_LEFT); break; case when: Then (GTK_PROGRESS_BAR (pdata-> pbar), then); break; default: break; // do nothing}/* clear allocated memory, delete timer (timer) */void destroy_progress (GtkWidget * widget, ProgressData * pdata) {gtk_timeout_remove (pdata-> timer); pdata-> timer = 0; pdata-> window = NULL; g_free (pdata); gt K_main_quit ();} int main (int argc, char * argv []) {ProgressData * pdata; GtkWidget * align; GtkWidget * separator; GtkWidget * table; GtkWidget * button; gtkWidget * check; GtkWidget * vbox; gtk_init (& argc, & argv);/* allocate memory for data transmitted to the callback function */pdata = g_malloc (sizeof (ProgressData )); pdata-> window = gtk_window_new (GTK_WINDOW_TOPLEVEL); gtk_window_set_resizable (GTK_WINDOW (pdata-> window), TRUE); g_signal_connect (G_OBJE CT (pdata-> window), "destroy", G_CALLBACK (destroy_progress), pdata); gtk_window_set_title (GTK_WINDOW (pdata-> window), "GtkProgressBar "); gtk_container_set_border_width (GTK_CONTAINER (pdata-> window), 0); vbox = gtk_vbox_new (FALSE, 5); gtk_container_set_border_width (GTK_CONTAINER (vbox), 10 ); gtk_container_add (GTK_CONTAINER (pdata-> window), vbox); gtk_widget_show (vbox);/* create a center-aligned object */align = gtk_ali Gnment_new (0.5, 0.5, 0, 0); gtk_box_pack_start (GTK_BOX (vbox), align, FALSE, FALSE, 5); gtk_widget_show (align ); /* create progress bar */pdata-> pbar = gtk_progress_bar_new (); gtk_container_add (GTK_CONTAINER (align), pdata-> pbar); gtk_widget_show (pdata-> pbar ); /* Add a timer (timer) to update the progress bar value */pdata-> timer = gtk_timeout_add (100, progress_timeout, pdata); separator = gtk_hseparator_new (); gtk_box_pack_start (GTK_BOX (v Box), separator, FALSE, FALSE, 0); gtk_widget_show (separator);/* number of rows, number of columns, homogeneity (homogeneous) */table = gtk_table_new (2, 2, FALSE ); gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, TRUE, 0); gtk_widget_show (table);/* Add a check button, to select whether the text is displayed in the chute */check = gtk_check_button_new_with_label ("Show text"); gtk_table_attach (GTK_TABLE (table), check, 0, 1, 0, 1, GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 5, 5); g _ Signal_connect (G_OBJECT (check), "clicked", G_CALLBACK (toggle_show_text), pdata); gtk_widget_show (check);/* Add a check button, switch Activity status */check = activities ("Activity mode"); gtk_table_attach (GTK_TABLE (table), check, 0, 1, 1, 2, GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 5, 5); g_signal_connect (G_OBJECT (check), "clicked", G_CALLBACK (toggle_activity_mode), pdata); gtk_widget_show (check) ;/* Add a check button to switch the moving direction */check = gtk_check_button_new_with_label ("Right to Left"); gtk_table_attach (GTK_TABLE (table), check, 0, 1, 2, 3, GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 5, 5); g_signal_connect (G_OBJECT (check), "clicked", G_CALLBACK (callback), pdata); gtk_widget_show (check ); /* Add a button to exit the application */button = gtk_button_new_with_label ("close"); g_signal_connect_swapped (G_OBJECT (Ton), "clicked", G_CALLBACK (gtk_widget_destroy), pdata-> window); gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0 ); /* set the button as a default component */GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);/* set the default focus to this button to make it the default button, you only need to press the Enter key *, which is equivalent to clicking this button * // note: the default component can become the default component after obtaining the focus, and you can switch the focus by pressing the direction key. Gtk_widget_grab_default (button); gtk_widget_show (pdata-> window); gtk_main (); return 0 ;}

# Target, compiler and objects.EXEC    =  testCC      =  gccOBJ     =  main.o# Use  for  compile.CFLAGS  =  `pkg-config  --cflags gtk+-2.0 --cflags glib-2.0`# Use  for  link.CLIBS   =  `pkg-config  --libs gtk+-2.0 --cflags glib-2.0`$(EXEC):$(OBJ)$(CC) -o $@ $^ $(CLIBS)main.o:main.c$(CC) -c $< $(CFLAGS)clean:rm $(EXEC)  * .o