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/*
* gretl -- Gnu Regression, Econometrics and Time-series Library
* Copyright (C) 2001 Allin Cottrell and Riccardo "Jack" Lucchetti
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* progress bar implementation for gretl */
#include "libgretl.h"
#ifdef WIN32
# include "gretl_win32.h"
#endif
#include <gtk/gtk.h>
typedef struct _ProgressData {
GtkWidget *window;
GtkWidget *label;
GtkWidget *pbar;
int *cancel;
} ProgressData;
static void destroy_progress (GtkWidget *widget, ProgressData **ppdata)
{
(*ppdata)->window = NULL;
free(*ppdata);
*ppdata = NULL;
}
static ProgressData *build_progress_window (int flag, int *cancel)
{
ProgressData *pdata;
GtkWidget *align, *vbox;
pdata = malloc(sizeof *pdata);
if (pdata == NULL) {
return NULL;
}
pdata->cancel = cancel;
pdata->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_resizable(GTK_WINDOW(pdata->window), FALSE);
if (flag == SP_LOAD_INIT) {
gtk_window_set_title(GTK_WINDOW(pdata->window), _("gretl: loading data"));
} else if (flag == SP_SAVE_INIT) {
gtk_window_set_title(GTK_WINDOW(pdata->window), _("gretl: storing data"));
} else if (flag == SP_FONT_INIT) {
gtk_window_set_title(GTK_WINDOW(pdata->window), _("gretl: scanning fonts"));
}
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);
/* Add a label */
pdata->label = gtk_label_new("");
gtk_box_pack_start(GTK_BOX(vbox), pdata->label, FALSE, FALSE, 0);
/* Create a centering alignment object */
align = gtk_alignment_new(0.5, 0.5, 0, 0);
gtk_box_pack_start(GTK_BOX(vbox), align, FALSE, FALSE, 5);
/* Create the GtkProgressBar */
pdata->pbar = gtk_progress_bar_new();
gtk_container_add(GTK_CONTAINER(align), pdata->pbar);
gtk_widget_show_all(pdata->window);
return pdata;
}
int show_progress (double res, double expected, int flag)
{
static ProgressData *pdata;
static double offs;
static int cancel;
if (expected == 0) {
return SP_RETURN_DONE;
}
if (res < 0 || flag == SP_FINISH) {
fprintf(stderr, "prog: got SP_FINISH\n");
/* clean up and get out */
if (pdata != NULL && pdata->window != NULL) {
gtk_widget_destroy(GTK_WIDGET(pdata->window));
while (gtk_events_pending()) {
gtk_main_iteration();
}
}
return SP_RETURN_DONE;
}
if (flag == SP_LOAD_INIT || flag == SP_SAVE_INIT || flag == SP_FONT_INIT) {
/* initialize the progress bar */
gchar *bytestr = NULL;
offs = 0;
cancel = 0;
pdata = build_progress_window(flag, &cancel);
if (pdata == NULL) {
return 0;
}
g_signal_connect(G_OBJECT(pdata->window), "destroy",
G_CALLBACK(destroy_progress),
&pdata);
gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(pdata->pbar), 0.0);
if (flag == SP_LOAD_INIT || flag == SP_SAVE_INIT) {
int Kb = (int) (expected / 1024);
bytestr = g_strdup_printf("%s %d Kbytes",
flag == SP_LOAD_INIT ?
_("Retrieving") : _("Storing"),
Kb);
} else if (flag == SP_FONT_INIT) {
bytestr = g_strdup_printf(_("Scanning %d fonts"), (int) expected);
}
gtk_label_set_text(GTK_LABEL(pdata->label), bytestr);
g_free(bytestr);
while (gtk_events_pending()) {
gtk_main_iteration();
}
}
if ((flag == SP_NONE || flag == SP_TOTAL) && cancel) {
/* the user canceled */
cancel = 0;
return SP_RETURN_CANCELED;
}
if ((flag == SP_NONE || flag == SP_TOTAL) &&
(pdata == NULL || pdata->window == NULL)) {
/* something has gone wrong */
return 0;
}
if (flag == SP_TOTAL) {
offs = res;
} else {
offs += res;
}
if (pdata != NULL) {
if (offs < expected) {
gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(pdata->pbar),
offs / expected);
while (gtk_events_pending()) {
gtk_main_iteration();
}
} else {
gtk_widget_destroy(GTK_WIDGET(pdata->window));
return SP_RETURN_DONE;
}
}
return SP_RETURN_OK;
}
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