src/ui-spinner.cc

   1 /*
   2  * Copyright (C) 2004 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "main.h"
  23 #include "ui-spinner.h"
  24
  25 #include "ui_icons.h"
  26 #include "ui-fileops.h"
  27
  28
  29 #define SPINNER_FRAMES 19
  30
  31
  32 /*
  33  *-----------------------------------------------------------------------------
  34  * spinner utility
  35  *-----------------------------------------------------------------------------
  36  */
  37
  38 struct SpinnerData {
  39         GtkWidget *image;
  40         GList *list;            /* list of pixbufs */
  41         guint frame;
  42         guint timer_id; /* event source id */
  43 };
  44
  45 static void spinner_set_frame(SpinnerData *sp, guint frame)
  46 {
  47         GdkPixbuf *pb;
  48
  49         pb = static_cast<GdkPixbuf *>(g_list_nth_data(sp->list, frame));
  50         if (pb) gtk_image_set_from_pixbuf(GTK_IMAGE(sp->image), pb);
  51
  52         sp->frame = frame;
  53 }
  54
  55 static void spinner_increment_frame(SpinnerData *sp)
  56 {
  57         sp->frame++;
  58         if (sp->frame >= g_list_length(sp->list)) sp->frame = 1;
  59         spinner_set_frame(sp, sp->frame);
  60 }
  61
  62 static gboolean spinner_loop_cb(gpointer data)
  63 {
  64         auto sp = static_cast<SpinnerData *>(data);
  65
  66         if (sp->list) spinner_increment_frame(sp);
  67
  68         return TRUE;
  69 }
  70
  71 static void spinner_set_timeout(SpinnerData *sp, gint interval)
  72 {
  73         if (!sp) return;
  74
  75         if (sp->timer_id)
  76                 {
  77                 g_source_remove(sp->timer_id);
  78                 sp->timer_id = 0;
  79                 }
  80
  81         if (interval > 0)
  82                 {
  83                 sp->timer_id = g_timeout_add(interval, spinner_loop_cb, sp);
  84                 }
  85         else if (interval < 0)
  86                 {
  87                 spinner_set_frame(sp, 0);
  88                 }
  89
  90         gtk_widget_set_sensitive(sp->image, (interval >= 0));
  91 }
  92
  93 static void spinner_destroy_cb(GtkWidget *, gpointer data)
  94 {
  95         auto sp = static_cast<SpinnerData *>(data);
  96
  97         spinner_set_timeout(sp, 0);
  98
  99         g_list_free_full(sp->list, g_object_unref);
 100         g_free(sp);
 101 }
 102
 103 GtkWidget *spinner_new(const gchar *path, gint interval)
 104 {
 105         SpinnerData *sp;
 106
 107         sp = g_new0(SpinnerData, 1);
 108
 109         if (path)
 110                 {
 111                 gchar *pathl;
 112                 GdkPixbuf *pb;
 113                 gint n;
 114                 gchar *buf;
 115
 116                 pathl = path_from_utf8(path);
 117
 118                 n = 0;
 119                 buf = g_strdup_printf("%s%02d.png", pathl, n);
 120                 while ((pb = gdk_pixbuf_new_from_file(buf, nullptr)))
 121                         {
 122                         sp->list = g_list_append(sp->list, pb);
 123
 124                         n++;
 125                         g_free(buf);
 126                         buf = g_strdup_printf("%s%02d.png", pathl, n);
 127                         }
 128                 g_free(buf);
 129
 130                 g_free(pathl);
 131                 }
 132
 133         if (!sp->list)
 134                 {
 135                 GdkPixbuf *pb;
 136                 gint n;
 137                 gint w, h;
 138
 139                 pb = gdk_pixbuf_new_from_inline(-1, icon_spinner, FALSE, nullptr);
 140                 w = gdk_pixbuf_get_width(pb);
 141                 h = gdk_pixbuf_get_height(pb) / SPINNER_FRAMES;
 142                 for (n = 0; n < SPINNER_FRAMES; n++)
 143                         {
 144                         sp->list = g_list_append(sp->list,
 145                                                  gdk_pixbuf_new_subpixbuf(pb, 0, n * h, w, h));
 146                         }
 147                 /* pb pixels is inline static, so the subpixbufs in sp->list will be ok */
 148                 g_object_unref(pb);
 149                 }
 150
 151         if (sp->list)
 152                 {
 153                 GdkPixbuf *pb;
 154
 155                 pb = static_cast<GdkPixbuf *>(sp->list->data);
 156                 sp->image = gtk_image_new_from_pixbuf(pb);
 157                 }
 158         else
 159                 {
 160                 sp->image = gtk_image_new_from_icon_name(GQ_ICON_MISSING_IMAGE, GTK_ICON_SIZE_DIALOG);
 161                 }
 162
 163         g_object_set_data(G_OBJECT(sp->image), "spinner", sp);
 164
 165         g_signal_connect(G_OBJECT(sp->image), "destroy",
 166                          G_CALLBACK(spinner_destroy_cb), sp);
 167
 168         spinner_set_timeout(sp, interval);
 169
 170         return sp->image;
 171 }
 172
 173 void spinner_set_interval(GtkWidget *spinner, gint interval)
 174 {
 175         SpinnerData *sp;
 176
 177         sp = static_cast<SpinnerData *>(g_object_get_data(G_OBJECT(spinner), "spinner"));
 178
 179         spinner_set_timeout(sp, interval);
 180 }
 181
 182 #pragma GCC diagnostic push
 183 #pragma GCC diagnostic ignored "-Wunused-function"
 184 void spinner_step_unused(GtkWidget *spinner, gboolean reset)
 185 {
 186         SpinnerData *sp;
 187
 188         sp = static_cast<SpinnerData *>(g_object_get_data(G_OBJECT(spinner), "spinner"));
 189         if (sp->timer_id)
 190                 {
 191                 log_printf("spinner warning: attempt to step with timer set\n");
 192                 return;
 193                 }
 194
 195         if (reset)
 196                 {
 197                 spinner_set_frame(sp, 0);
 198                 }
 199         else
 200                 {
 201                 spinner_increment_frame(sp);
 202                 }
 203 }
 204 #pragma GCC diagnostic pop
 205 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */