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 #if GTK_CHECK_VERSION(3,0,0)
 152 static gboolean bar_pane_histogram_draw_cb(GtkWidget *widget, cairo_t *cr, gpointer data)
 153 {
 154         PaneHistogramData *phd = data;
 155         if (!phd) return TRUE;
 156
 157         if (phd->need_update)
 158                 {
 159                 bar_pane_histogram_update(phd);
 160                 }
 161
 162         if (!phd->pixbuf) return TRUE;
 163
 164         gdk_cairo_set_source_pixbuf(cr, phd->pixbuf, 0, 0);
 165         cairo_paint (cr);
 166
 167         return TRUE;
 168 }
 169
 170 #else
 171 static gboolean bar_pane_histogram_expose_event_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 172 {
 173         PaneHistogramData *phd = data;
 174         if (!phd) return TRUE;
 175
 176         if (phd->need_update)
 177                 {
 178                 bar_pane_histogram_update(phd);
 179                 }
 180
 181         if (!phd->pixbuf) return TRUE;
 182
 183         cairo_t *cr = gdk_cairo_create(gtk_widget_get_window(widget));
 184         gdk_cairo_set_source_pixbuf (cr, phd->pixbuf, 0, 0);
 185         cairo_paint (cr);
 186         cairo_destroy (cr);
 187
 188         return TRUE;
 189 }
 190 #endif
 191
 192 static void bar_pane_histogram_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
 193 {
 194         PaneHistogramData *phd = data;
 195
 196         phd->histogram_width = allocation->width;
 197         phd->histogram_height = allocation->height;
 198         bar_pane_histogram_update(phd);
 199 }
 200
 201 static void bar_pane_histogram_destroy(GtkWidget *widget, gpointer data)
 202 {
 203         PaneHistogramData *phd = data;
 204
 205         if (phd->idle_id) g_source_remove(phd->idle_id);
 206         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 207
 208         file_data_unref(phd->fd);
 209         histogram_free(phd->histogram);
 210         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 211         g_free(phd->pane.id);
 212
 213         g_free(phd);
 214 }
 215
 216 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 217 {
 218         PaneHistogramData *phd = data;
 219         gint channel;
 220
 221         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 222
 223         if (!phd) return;
 224
 225         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 226         if (channel == histogram_get_channel(phd->histogram)) return;
 227
 228         histogram_set_channel(phd->histogram, channel);
 229         bar_pane_histogram_update(phd);
 230 }
 231
 232 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 233 {
 234         PaneHistogramData *phd = data;
 235         gint logmode;
 236
 237         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 238
 239         if (!phd) return;
 240
 241         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 242         if (logmode == histogram_get_mode(phd->histogram)) return;
 243
 244         histogram_set_mode(phd->histogram, logmode);
 245         bar_pane_histogram_update(phd);
 246 }
 247
 248 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 249 {
 250         GtkWidget *menu;
 251         gint channel = histogram_get_channel(phd->histogram);
 252         gint mode = histogram_get_mode(phd->histogram);
 253
 254         menu = popup_menu_short_lived();
 255
 256         /* use the same strings as in layout_util.c */
 257         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);
 258         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);
 259         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);
 260         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);
 261         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);
 262
 263         menu_item_add_divider(menu);
 264
 265         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 266         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 267
 268         return menu;
 269 }
 270
 271 static gboolean bar_pane_histogram_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
 272 {
 273         PaneHistogramData *phd = data;
 274
 275         if (bevent->button == MOUSE_BUTTON_RIGHT)
 276                 {
 277                 GtkWidget *menu;
 278
 279                 menu = bar_pane_histogram_menu(phd);
 280                 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
 281                 return TRUE;
 282         }
 283
 284         return FALSE;
 285 }
 286
 287
 288 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 289 {
 290         PaneHistogramData *phd;
 291
 292         phd = g_new0(PaneHistogramData, 1);
 293
 294         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 295         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 296         phd->pane.title = bar_pane_expander_title(title);
 297         phd->pane.id = g_strdup(id);
 298         phd->pane.type = PANE_HISTOGRAM;
 299
 300         phd->pane.expanded = expanded;
 301
 302         phd->histogram = histogram_new();
 303
 304         histogram_set_channel(phd->histogram, histogram_channel);
 305         histogram_set_mode(phd->histogram, histogram_mode);
 306
 307         phd->widget = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 308
 309         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 310         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 311                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 312
 313
 314         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 315
 316         phd->drawing_area = gtk_drawing_area_new();
 317         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 318                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 319
 320 #if GTK_CHECK_VERSION(3,0,0)
 321         g_signal_connect(G_OBJECT(phd->drawing_area), "draw",
 322                          G_CALLBACK(bar_pane_histogram_draw_cb), phd);
 323 #else
 324         g_signal_connect(G_OBJECT(phd->drawing_area), "expose_event",
 325                          G_CALLBACK(bar_pane_histogram_expose_event_cb), phd);
 326 #endif
 327
 328         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 329         gtk_widget_show(phd->drawing_area);
 330         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 331
 332         g_signal_connect(G_OBJECT(phd->drawing_area), "button_press_event", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 333
 334         gtk_widget_show(phd->widget);
 335
 336         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 337
 338         return phd->widget;
 339 }
 340
 341 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 342 {
 343         gchar *title = NULL;
 344         gchar *id = g_strdup("histogram");
 345         gboolean expanded = TRUE;
 346         gint height = 80;
 347         gint histogram_channel = HCHAN_RGB;
 348         gint histogram_mode = 0;
 349         GtkWidget *ret;
 350
 351         while (*attribute_names)
 352                 {
 353                 const gchar *option = *attribute_names++;
 354                 const gchar *value = *attribute_values++;
 355
 356                 if (READ_CHAR_FULL("id", id)) continue;
 357                 if (READ_CHAR_FULL("title", title)) continue;
 358                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 359                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 360                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 361
 362                 log_printf("unknown attribute %s = %s\n", option, value);
 363                 }
 364
 365         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 366         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 367         g_free(title);
 368         g_free(id);
 369         return ret;
 370 }
 371
 372 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 373 {
 374         PaneHistogramData *phd;
 375
 376         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 377         if (!phd) return;
 378
 379         gint histogram_channel = phd->histogram->histogram_channel;
 380         gint histogram_mode = phd->histogram->histogram_mode;
 381
 382         while (*attribute_names)
 383                 {
 384                 const gchar *option = *attribute_names++;
 385                 const gchar *value = *attribute_values++;
 386
 387                 if (READ_CHAR_FULL("id", phd->pane.id)) continue;
 388 //              if (READ_CHAR_FULL("pane.title", title)) continue;
 389                 if (READ_BOOL_FULL("expanded", phd->pane.expanded)) continue;
 390                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 391                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 392
 393
 394                 log_printf("unknown attribute %s = %s\n", option, value);
 395                 }
 396
 397         histogram_set_channel(phd->histogram, histogram_channel);
 398         histogram_set_mode(phd->histogram, histogram_mode);
 399
 400         bar_update_expander(pane);
 401         bar_pane_histogram_update(phd);
 402 }
 403
 404
 405 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */