src/bar-histogram.cc

   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 "filedata.h"
  27 #include "ui-menu.h"
  28 #include "ui-misc.h"
  29 #include "histogram.h"
  30 #include "rcfile.h"
  31
  32 /*
  33  *-------------------------------------------------------------------
  34  * keyword / comment utils
  35  *-------------------------------------------------------------------
  36  */
  37
  38
  39
  40 struct PaneHistogramData
  41 {
  42         PaneData pane;
  43         GtkWidget *widget;
  44         GtkWidget *drawing_area;
  45         Histogram *histogram;
  46         gint histogram_width;
  47         gint histogram_height;
  48         GdkPixbuf *pixbuf;
  49         FileData *fd;
  50         gboolean need_update;
  51         guint idle_id; /* event source id */
  52 };
  53
  54 static gboolean bar_pane_histogram_update_cb(gpointer data);
  55
  56
  57 static void bar_pane_histogram_update(PaneHistogramData *phd)
  58 {
  59         if (phd->pixbuf) g_object_unref(phd->pixbuf);
  60         phd->pixbuf = nullptr;
  61
  62         gtk_label_set_text(GTK_LABEL(phd->pane.title), histogram_label(phd->histogram));
  63
  64         if (!phd->histogram_width || !phd->histogram_height || !phd->fd) return;
  65
  66         /** histmap_get is relatively expensive, run it only when we really need it
  67            and with lower priority than pixbuf_renderer
  68            @FIXME this does not work for fullscreen */
  69         if (gtk_widget_is_drawable(phd->drawing_area))
  70                 {
  71                 if (!phd->idle_id)
  72                         {
  73                         phd->idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, bar_pane_histogram_update_cb, phd, nullptr);
  74                         }
  75                 }
  76         else
  77                 {
  78                 phd->need_update = TRUE;
  79                 }
  80 }
  81
  82 static gboolean bar_pane_histogram_update_cb(gpointer data)
  83 {
  84         const HistMap *histmap;
  85         auto phd = static_cast<PaneHistogramData *>(data);
  86
  87         phd->idle_id = 0;
  88         phd->need_update = FALSE;
  89
  90         gq_gtk_widget_queue_draw_area(GTK_WIDGET(phd->drawing_area), 0, 0, phd->histogram_width, phd->histogram_height);
  91
  92         if (phd->fd == nullptr) return G_SOURCE_REMOVE;
  93         histmap = histmap_get(phd->fd);
  94
  95         if (!histmap)
  96                 {
  97                 histmap_start_idle(phd->fd);
  98                 return G_SOURCE_REMOVE;
  99                 }
 100
 101         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
 102         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
 103         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
 104
 105         return G_SOURCE_REMOVE;
 106 }
 107
 108
 109 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
 110 {
 111         PaneHistogramData *phd;
 112
 113         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 114         if (!phd) return;
 115
 116         file_data_unref(phd->fd);
 117         phd->fd = file_data_ref(fd);
 118
 119         bar_pane_histogram_update(phd);
 120 }
 121
 122 static void bar_pane_histogram_write_config(GtkWidget *pane, GString *outstr, gint indent)
 123 {
 124         PaneHistogramData *phd;
 125
 126         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 127         if (!phd) return;
 128
 129         WRITE_NL(); WRITE_STRING("<pane_histogram ");
 130         write_char_option(outstr, indent, "id", phd->pane.id);
 131         write_char_option(outstr, indent, "title", gtk_label_get_text(GTK_LABEL(phd->pane.title)));
 132         WRITE_BOOL(phd->pane, expanded);
 133         WRITE_INT(*phd->histogram, histogram_channel);
 134         WRITE_INT(*phd->histogram, histogram_mode);
 135         WRITE_STRING("/>");
 136 }
 137
 138 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
 139 {
 140         auto phd = static_cast<PaneHistogramData *>(data);
 141         if ((type & (NOTIFY_REREAD | NOTIFY_CHANGE | NOTIFY_HISTMAP | NOTIFY_PIXBUF)) && fd == phd->fd)
 142                 {
 143                 DEBUG_1("Notify pane_histogram: %s %04x", fd->path, type);
 144                 bar_pane_histogram_update(phd);
 145                 }
 146 }
 147
 148 static gboolean bar_pane_histogram_draw_cb(GtkWidget *, cairo_t *cr, gpointer data)
 149 {
 150         auto phd = static_cast<PaneHistogramData *>(data);
 151         if (!phd) return TRUE;
 152
 153         if (phd->need_update)
 154                 {
 155                 bar_pane_histogram_update(phd);
 156                 }
 157
 158         if (!phd->pixbuf) return TRUE;
 159
 160         gdk_cairo_set_source_pixbuf(cr, phd->pixbuf, 0, 0);
 161         cairo_paint (cr);
 162
 163         return TRUE;
 164 }
 165
 166 static void bar_pane_histogram_size_cb(GtkWidget *, GtkAllocation *allocation, gpointer data)
 167 {
 168         auto phd = static_cast<PaneHistogramData *>(data);
 169
 170         phd->histogram_width = allocation->width;
 171         phd->histogram_height = allocation->height;
 172         bar_pane_histogram_update(phd);
 173 }
 174
 175 static void bar_pane_histogram_destroy(GtkWidget *, gpointer data)
 176 {
 177         auto phd = static_cast<PaneHistogramData *>(data);
 178
 179         if (phd->idle_id) g_source_remove(phd->idle_id);
 180         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 181
 182         file_data_unref(phd->fd);
 183         histogram_free(phd->histogram);
 184         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 185         g_free(phd->pane.id);
 186
 187         g_free(phd);
 188 }
 189
 190 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 191 {
 192         auto phd = static_cast<PaneHistogramData *>(data);
 193         gint channel;
 194
 195         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 196
 197         if (!phd) return;
 198
 199         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 200         if (channel == histogram_get_channel(phd->histogram)) return;
 201
 202         histogram_set_channel(phd->histogram, channel);
 203         bar_pane_histogram_update(phd);
 204 }
 205
 206 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 207 {
 208         auto phd = static_cast<PaneHistogramData *>(data);
 209         gint logmode;
 210
 211         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 212
 213         if (!phd) return;
 214
 215         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 216         if (logmode == histogram_get_mode(phd->histogram)) return;
 217
 218         histogram_set_mode(phd->histogram, logmode);
 219         bar_pane_histogram_update(phd);
 220 }
 221
 222 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 223 {
 224         GtkWidget *menu;
 225         gint channel = histogram_get_channel(phd->histogram);
 226         gint mode = histogram_get_mode(phd->histogram);
 227
 228         menu = popup_menu_short_lived();
 229
 230         /* use the same strings as in layout-util.cc */
 231         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);
 232         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);
 233         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);
 234         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);
 235         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);
 236
 237         menu_item_add_divider(menu);
 238
 239         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 240         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 241
 242         return menu;
 243 }
 244
 245 static gboolean bar_pane_histogram_press_cb(GtkGesture *, gint, gdouble, gdouble, gpointer data)
 246 {
 247         auto phd = static_cast<PaneHistogramData *>(data);
 248         GtkWidget *menu;
 249
 250         menu = bar_pane_histogram_menu(phd);
 251         gtk_menu_popup_at_pointer(GTK_MENU(menu), nullptr);
 252
 253         return TRUE;
 254 }
 255
 256
 257 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 258 {
 259         PaneHistogramData *phd;
 260         GtkGesture *gesture;
 261
 262         phd = g_new0(PaneHistogramData, 1);
 263
 264         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 265         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 266         phd->pane.title = bar_pane_expander_title(title);
 267         phd->pane.id = g_strdup(id);
 268         phd->pane.type = PANE_HISTOGRAM;
 269
 270         phd->pane.expanded = expanded;
 271
 272         phd->histogram = histogram_new();
 273
 274         histogram_set_channel(phd->histogram, histogram_channel);
 275         histogram_set_mode(phd->histogram, histogram_mode);
 276
 277         phd->widget = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, PREF_PAD_GAP);
 278
 279         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 280         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 281                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 282
 283
 284         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 285
 286         phd->drawing_area = gtk_drawing_area_new();
 287         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 288                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 289
 290         g_signal_connect(G_OBJECT(phd->drawing_area), "draw",
 291                          G_CALLBACK(bar_pane_histogram_draw_cb), phd);
 292
 293         gq_gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 294         gtk_widget_show(phd->drawing_area);
 295         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 296
 297
 298 #ifdef HAVE_GTK4
 299         gesture = gtk_gesture_click_new();
 300         gtk_widget_add_controller(phd->drawing_area, GTK_EVENT_CONTROLLER(gesture));
 301 #else
 302         gesture = gtk_gesture_multi_press_new(phd->drawing_area);
 303 #endif
 304         gtk_gesture_single_set_button(GTK_GESTURE_SINGLE(gesture), MOUSE_BUTTON_RIGHT);
 305         g_signal_connect(gesture, "pressed", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 306
 307         gtk_widget_show(phd->widget);
 308
 309         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 310
 311         return phd->widget;
 312 }
 313
 314 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 315 {
 316         gchar *title = nullptr;
 317         gchar *id = g_strdup("histogram");
 318         gboolean expanded = TRUE;
 319         gint height = 80;
 320         gint histogram_channel = HCHAN_RGB;
 321         gint histogram_mode = 0;
 322         GtkWidget *ret;
 323
 324         while (*attribute_names)
 325                 {
 326                 const gchar *option = *attribute_names++;
 327                 const gchar *value = *attribute_values++;
 328
 329                 if (READ_CHAR_FULL("id", id)) continue;
 330                 if (READ_CHAR_FULL("title", title)) continue;
 331                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 332                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 333                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 334
 335                 log_printf("unknown attribute %s = %s\n", option, value);
 336                 }
 337
 338         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 339         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 340         g_free(title);
 341         g_free(id);
 342         return ret;
 343 }
 344
 345 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 346 {
 347         PaneHistogramData *phd;
 348
 349         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 350         if (!phd) return;
 351
 352         gint histogram_channel = phd->histogram->histogram_channel;
 353         gint histogram_mode = phd->histogram->histogram_mode;
 354
 355         while (*attribute_names)
 356                 {
 357                 const gchar *option = *attribute_names++;
 358                 const gchar *value = *attribute_values++;
 359
 360                 if (READ_CHAR_FULL("id", phd->pane.id)) 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: */