src/bar_histogram.c

   1 /*
   2  * Copyright (C) 2004 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: Vladimir Nadvornik
   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 "bar_histogram.h"
  24
  25 #include "bar.h"
  26 #include "metadata.h"
  27 #include "filedata.h"
  28 #include "menu.h"
  29 #include "ui_menu.h"
  30 #include "ui_misc.h"
  31 #include "histogram.h"
  32 #include "rcfile.h"
  33
  34 /*
  35  *-------------------------------------------------------------------
  36  * keyword / comment utils
  37  *-------------------------------------------------------------------
  38  */
  39
  40
  41
  42 typedef struct _PaneHistogramData PaneHistogramData;
  43 struct _PaneHistogramData
  44 {
  45         PaneData pane;
  46         GtkWidget *widget;
  47         GtkWidget *drawing_area;
  48         Histogram *histogram;
  49         gint histogram_width;
  50         gint histogram_height;
  51         GdkPixbuf *pixbuf;
  52         FileData *fd;
  53         gboolean need_update;
  54         guint idle_id; /* event source id */
  55 };
  56
  57 static gboolean bar_pane_histogram_update_cb(gpointer data);
  58
  59
  60 static void bar_pane_histogram_update(PaneHistogramData *phd)
  61 {
  62         if (phd->pixbuf) g_object_unref(phd->pixbuf);
  63         phd->pixbuf = NULL;
  64
  65         gtk_label_set_text(GTK_LABEL(phd->pane.title), histogram_label(phd->histogram));
  66
  67         if (!phd->histogram_width || !phd->histogram_height || !phd->fd) return;
  68
  69         /** histmap_get is relatively expensive, run it only when we really need it
  70            and with lower priority than pixbuf_renderer
  71            @FIXME this does not work for fullscreen */
  72         if (gtk_widget_is_drawable(phd->drawing_area))
  73                 {
  74                 if (!phd->idle_id)
  75                         {
  76                         phd->idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, bar_pane_histogram_update_cb, phd, NULL);
  77                         }
  78                 }
  79         else
  80                 {
  81                 phd->need_update = TRUE;
  82                 }
  83 }
  84
  85 static gboolean bar_pane_histogram_update_cb(gpointer data)
  86 {
  87         const HistMap *histmap;
  88         PaneHistogramData *phd = data;
  89
  90         phd->idle_id = 0;
  91         phd->need_update = FALSE;
  92
  93         gtk_widget_queue_draw_area(GTK_WIDGET(phd->drawing_area), 0, 0, phd->histogram_width, phd->histogram_height);
  94
  95         if (phd->fd == NULL) return FALSE;
  96         histmap = histmap_get(phd->fd);
  97
  98         if (!histmap)
  99                 {
 100                 histmap_start_idle(phd->fd);
 101                 return FALSE;
 102                 }
 103
 104         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
 105         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
 106         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
 107
 108         return FALSE;
 109 }
 110
 111
 112 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
 113 {
 114         PaneHistogramData *phd;
 115
 116         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 117         if (!phd) return;
 118
 119         file_data_unref(phd->fd);
 120         phd->fd = file_data_ref(fd);
 121
 122         bar_pane_histogram_update(phd);
 123 }
 124
 125 static void bar_pane_histogram_write_config(GtkWidget *pane, GString *outstr, gint indent)
 126 {
 127         PaneHistogramData *phd;
 128
 129         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 130         if (!phd) return;
 131
 132         WRITE_NL(); WRITE_STRING("<pane_histogram ");
 133         write_char_option(outstr, indent, "id", phd->pane.id);
 134         write_char_option(outstr, indent, "title", gtk_label_get_text(GTK_LABEL(phd->pane.title)));
 135         WRITE_BOOL(phd->pane, expanded);
 136         WRITE_INT(*phd->histogram, histogram_channel);
 137         WRITE_INT(*phd->histogram, histogram_mode);
 138         WRITE_STRING("/>");
 139 }
 140
 141 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
 142 {
 143         PaneHistogramData *phd = data;
 144         if ((type & (NOTIFY_REREAD | NOTIFY_CHANGE | NOTIFY_HISTMAP | NOTIFY_PIXBUF)) && fd == phd->fd)
 145                 {
 146                 DEBUG_1("Notify pane_histogram: %s %04x", fd->path, type);
 147                 bar_pane_histogram_update(phd);
 148                 }
 149 }
 150
 151 static gboolean bar_pane_histogram_draw_cb(GtkWidget *UNUSED(widget), cairo_t *cr, gpointer data)
 152 {
 153         PaneHistogramData *phd = data;
 154         if (!phd) return TRUE;
 155
 156         if (phd->need_update)
 157                 {
 158                 bar_pane_histogram_update(phd);
 159                 }
 160
 161         if (!phd->pixbuf) return TRUE;
 162
 163         gdk_cairo_set_source_pixbuf(cr, phd->pixbuf, 0, 0);
 164         cairo_paint (cr);
 165
 166         return TRUE;
 167 }
 168
 169 static void bar_pane_histogram_size_cb(GtkWidget *UNUSED(widget), GtkAllocation *allocation, gpointer data)
 170 {
 171         PaneHistogramData *phd = data;
 172
 173         phd->histogram_width = allocation->width;
 174         phd->histogram_height = allocation->height;
 175         bar_pane_histogram_update(phd);
 176 }
 177
 178 static void bar_pane_histogram_destroy(GtkWidget *UNUSED(widget), gpointer data)
 179 {
 180         PaneHistogramData *phd = data;
 181
 182         if (phd->idle_id) g_source_remove(phd->idle_id);
 183         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 184
 185         file_data_unref(phd->fd);
 186         histogram_free(phd->histogram);
 187         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 188         g_free(phd->pane.id);
 189
 190         g_free(phd);
 191 }
 192
 193 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 194 {
 195         PaneHistogramData *phd = data;
 196         gint channel;
 197
 198         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 199
 200         if (!phd) return;
 201
 202         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 203         if (channel == histogram_get_channel(phd->histogram)) return;
 204
 205         histogram_set_channel(phd->histogram, channel);
 206         bar_pane_histogram_update(phd);
 207 }
 208
 209 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 210 {
 211         PaneHistogramData *phd = data;
 212         gint logmode;
 213
 214         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 215
 216         if (!phd) return;
 217
 218         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 219         if (logmode == histogram_get_mode(phd->histogram)) return;
 220
 221         histogram_set_mode(phd->histogram, logmode);
 222         bar_pane_histogram_update(phd);
 223 }
 224
 225 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 226 {
 227         GtkWidget *menu;
 228         gint channel = histogram_get_channel(phd->histogram);
 229         gint mode = histogram_get_mode(phd->histogram);
 230
 231         menu = popup_menu_short_lived();
 232
 233         /* use the same strings as in layout_util.c */
 234         menu_item_add_radio(menu, _("Histogram on _Red"),   GINT_TO_POINTER(HCHAN_R), (channel == HCHAN_R), G_CALLBACK(bar_pane_histogram_popup_channels_cb), phd);
 235         menu_item_add_radio(menu, _("Histogram on _Green"), GINT_TO_POINTER(HCHAN_G), (channel == HCHAN_G), G_CALLBACK(bar_pane_histogram_popup_channels_cb), phd);
 236         menu_item_add_radio(menu, _("Histogram on _Blue"),  GINT_TO_POINTER(HCHAN_B), (channel == HCHAN_B), G_CALLBACK(bar_pane_histogram_popup_channels_cb), phd);
 237         menu_item_add_radio(menu, _("_Histogram on RGB"),   GINT_TO_POINTER(HCHAN_RGB), (channel == HCHAN_RGB), G_CALLBACK(bar_pane_histogram_popup_channels_cb), phd);
 238         menu_item_add_radio(menu, _("Histogram on _Value"), GINT_TO_POINTER(HCHAN_MAX), (channel == HCHAN_MAX), G_CALLBACK(bar_pane_histogram_popup_channels_cb), phd);
 239
 240         menu_item_add_divider(menu);
 241
 242         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 243         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 244
 245         return menu;
 246 }
 247
 248 static gboolean bar_pane_histogram_press_cb(GtkWidget *UNUSED(widget), GdkEventButton *bevent, gpointer data)
 249 {
 250         PaneHistogramData *phd = data;
 251
 252         if (bevent->button == MOUSE_BUTTON_RIGHT)
 253                 {
 254                 GtkWidget *menu;
 255
 256                 menu = bar_pane_histogram_menu(phd);
 257                 gtk_menu_popup_at_pointer(GTK_MENU(menu), NULL);
 258                 return TRUE;
 259         }
 260
 261         return FALSE;
 262 }
 263
 264
 265 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 266 {
 267         PaneHistogramData *phd;
 268
 269         phd = g_new0(PaneHistogramData, 1);
 270
 271         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 272         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 273         phd->pane.title = bar_pane_expander_title(title);
 274         phd->pane.id = g_strdup(id);
 275         phd->pane.type = PANE_HISTOGRAM;
 276
 277         phd->pane.expanded = expanded;
 278
 279         phd->histogram = histogram_new();
 280
 281         histogram_set_channel(phd->histogram, histogram_channel);
 282         histogram_set_mode(phd->histogram, histogram_mode);
 283
 284         phd->widget = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, PREF_PAD_GAP);
 285
 286         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 287         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 288                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 289
 290
 291         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 292
 293         phd->drawing_area = gtk_drawing_area_new();
 294         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 295                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 296
 297         g_signal_connect(G_OBJECT(phd->drawing_area), "draw",
 298                          G_CALLBACK(bar_pane_histogram_draw_cb), phd);
 299
 300         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 301         gtk_widget_show(phd->drawing_area);
 302         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 303
 304         g_signal_connect(G_OBJECT(phd->drawing_area), "button_press_event", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 305
 306         gtk_widget_show(phd->widget);
 307
 308         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 309
 310         return phd->widget;
 311 }
 312
 313 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 314 {
 315         gchar *title = NULL;
 316         gchar *id = g_strdup("histogram");
 317         gboolean expanded = TRUE;
 318         gint height = 80;
 319         gint histogram_channel = HCHAN_RGB;
 320         gint histogram_mode = 0;
 321         GtkWidget *ret;
 322
 323         while (*attribute_names)
 324                 {
 325                 const gchar *option = *attribute_names++;
 326                 const gchar *value = *attribute_values++;
 327
 328                 if (READ_CHAR_FULL("id", id)) continue;
 329                 if (READ_CHAR_FULL("title", title)) continue;
 330                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 331                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 332                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 333
 334                 log_printf("unknown attribute %s = %s\n", option, value);
 335                 }
 336
 337         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 338         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 339         g_free(title);
 340         g_free(id);
 341         return ret;
 342 }
 343
 344 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 345 {
 346         PaneHistogramData *phd;
 347
 348         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 349         if (!phd) return;
 350
 351         gint histogram_channel = phd->histogram->histogram_channel;
 352         gint histogram_mode = phd->histogram->histogram_mode;
 353
 354         while (*attribute_names)
 355                 {
 356                 const gchar *option = *attribute_names++;
 357                 const gchar *value = *attribute_values++;
 358
 359                 if (READ_CHAR_FULL("id", phd->pane.id)) continue;
 360 //              if (READ_CHAR_FULL("pane.title", title)) continue;
 361                 if (READ_BOOL_FULL("expanded", phd->pane.expanded)) continue;
 362                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 363                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 364
 365
 366                 log_printf("unknown attribute %s = %s\n", option, value);
 367                 }
 368
 369         histogram_set_channel(phd->histogram, histogram_channel);
 370         histogram_set_mode(phd->histogram, histogram_mode);
 371
 372         bar_update_expander(pane);
 373         bar_pane_histogram_update(phd);
 374 }
 375
 376
 377 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */