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 "bar-histogram.h"
  23
  24 #include <config.h>
  25
  26 #include "bar.h"
  27 #include "compat.h"
  28 #include "debug.h"
  29 #include "filedata.h"
  30 #include "histogram.h"
  31 #include "intl.h"
  32 #include "rcfile.h"
  33 #include "ui-menu.h"
  34 #include "ui-misc.h"
  35
  36 /*
  37  *-------------------------------------------------------------------
  38  * keyword / comment utils
  39  *-------------------------------------------------------------------
  40  */
  41
  42
  43
  44 struct PaneHistogramData
  45 {
  46         PaneData pane;
  47         GtkWidget *widget;
  48         GtkWidget *drawing_area;
  49         Histogram *histogram;
  50         gint histogram_width;
  51         gint histogram_height;
  52         GdkPixbuf *pixbuf;
  53         FileData *fd;
  54         gboolean need_update;
  55         guint idle_id; /* event source id */
  56 };
  57
  58 static gboolean bar_pane_histogram_update_cb(gpointer data);
  59
  60
  61 static void bar_pane_histogram_update(PaneHistogramData *phd)
  62 {
  63         if (phd->pixbuf) g_object_unref(phd->pixbuf);
  64         phd->pixbuf = nullptr;
  65
  66         gtk_label_set_text(GTK_LABEL(phd->pane.title), histogram_label(phd->histogram));
  67
  68         if (!phd->histogram_width || !phd->histogram_height || !phd->fd) return;
  69
  70         /** histmap_get is relatively expensive, run it only when we really need it
  71            and with lower priority than pixbuf_renderer
  72            @FIXME this does not work for fullscreen */
  73         if (gtk_widget_is_drawable(phd->drawing_area))
  74                 {
  75                 if (!phd->idle_id)
  76                         {
  77                         phd->idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, bar_pane_histogram_update_cb, phd, nullptr);
  78                         }
  79                 }
  80         else
  81                 {
  82                 phd->need_update = TRUE;
  83                 }
  84 }
  85
  86 static gboolean bar_pane_histogram_update_cb(gpointer data)
  87 {
  88         const HistMap *histmap;
  89         auto phd = static_cast<PaneHistogramData *>(data);
  90
  91         phd->idle_id = 0;
  92         phd->need_update = FALSE;
  93
  94         gq_gtk_widget_queue_draw_area(GTK_WIDGET(phd->drawing_area), 0, 0, phd->histogram_width, phd->histogram_height);
  95
  96         if (phd->fd == nullptr) return G_SOURCE_REMOVE;
  97         histmap = histmap_get(phd->fd);
  98
  99         if (!histmap)
 100                 {
 101                 histmap_start_idle(phd->fd);
 102                 return G_SOURCE_REMOVE;
 103                 }
 104
 105         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
 106         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
 107         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
 108
 109         return G_SOURCE_REMOVE;
 110 }
 111
 112
 113 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
 114 {
 115         PaneHistogramData *phd;
 116
 117         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 118         if (!phd) return;
 119
 120         file_data_unref(phd->fd);
 121         phd->fd = file_data_ref(fd);
 122
 123         bar_pane_histogram_update(phd);
 124 }
 125
 126 static void bar_pane_histogram_write_config(GtkWidget *pane, GString *outstr, gint indent)
 127 {
 128         PaneHistogramData *phd;
 129
 130         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 131         if (!phd) return;
 132
 133         WRITE_NL(); WRITE_STRING("<pane_histogram ");
 134         write_char_option(outstr, indent, "id", phd->pane.id);
 135         write_char_option(outstr, indent, "title", gtk_label_get_text(GTK_LABEL(phd->pane.title)));
 136         WRITE_BOOL(phd->pane, expanded);
 137         WRITE_INT(*phd->histogram, histogram_channel);
 138         WRITE_INT(*phd->histogram, histogram_mode);
 139         WRITE_STRING("/>");
 140 }
 141
 142 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
 143 {
 144         auto phd = static_cast<PaneHistogramData *>(data);
 145         if ((type & (NOTIFY_REREAD | NOTIFY_CHANGE | NOTIFY_HISTMAP | NOTIFY_PIXBUF)) && fd == phd->fd)
 146                 {
 147                 DEBUG_1("Notify pane_histogram: %s %04x", fd->path, type);
 148                 bar_pane_histogram_update(phd);
 149                 }
 150 }
 151
 152 static gboolean bar_pane_histogram_draw_cb(GtkWidget *, cairo_t *cr, gpointer data)
 153 {
 154         auto phd = static_cast<PaneHistogramData *>(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 static void bar_pane_histogram_size_cb(GtkWidget *, GtkAllocation *allocation, gpointer data)
 171 {
 172         auto phd = static_cast<PaneHistogramData *>(data);
 173
 174         phd->histogram_width = allocation->width;
 175         phd->histogram_height = allocation->height;
 176         bar_pane_histogram_update(phd);
 177 }
 178
 179 static void bar_pane_histogram_destroy(GtkWidget *, gpointer data)
 180 {
 181         auto phd = static_cast<PaneHistogramData *>(data);
 182
 183         if (phd->idle_id) g_source_remove(phd->idle_id);
 184         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 185
 186         file_data_unref(phd->fd);
 187         histogram_free(phd->histogram);
 188         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 189         g_free(phd->pane.id);
 190
 191         g_free(phd);
 192 }
 193
 194 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 195 {
 196         auto phd = static_cast<PaneHistogramData *>(data);
 197         gint channel;
 198
 199         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 200
 201         if (!phd) return;
 202
 203         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 204         if (channel == histogram_get_channel(phd->histogram)) return;
 205
 206         histogram_set_channel(phd->histogram, channel);
 207         bar_pane_histogram_update(phd);
 208 }
 209
 210 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 211 {
 212         auto phd = static_cast<PaneHistogramData *>(data);
 213         gint logmode;
 214
 215         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 216
 217         if (!phd) return;
 218
 219         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 220         if (logmode == histogram_get_mode(phd->histogram)) return;
 221
 222         histogram_set_mode(phd->histogram, logmode);
 223         bar_pane_histogram_update(phd);
 224 }
 225
 226 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 227 {
 228         GtkWidget *menu;
 229         gint channel = histogram_get_channel(phd->histogram);
 230         gint mode = histogram_get_mode(phd->histogram);
 231
 232         menu = popup_menu_short_lived();
 233
 234         /* use the same strings as in layout-util.cc */
 235         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);
 236         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);
 237         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);
 238         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);
 239         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);
 240
 241         menu_item_add_divider(menu);
 242
 243         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 244         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 245
 246         return menu;
 247 }
 248
 249 static gboolean bar_pane_histogram_press_cb(GtkGesture *, gint, gdouble, gdouble, gpointer data)
 250 {
 251         auto phd = static_cast<PaneHistogramData *>(data);
 252         GtkWidget *menu;
 253
 254         menu = bar_pane_histogram_menu(phd);
 255         gtk_menu_popup_at_pointer(GTK_MENU(menu), nullptr);
 256
 257         return TRUE;
 258 }
 259
 260
 261 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 262 {
 263         PaneHistogramData *phd;
 264         GtkGesture *gesture;
 265
 266         phd = g_new0(PaneHistogramData, 1);
 267
 268         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 269         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 270         phd->pane.title = bar_pane_expander_title(title);
 271         phd->pane.id = g_strdup(id);
 272         phd->pane.type = PANE_HISTOGRAM;
 273
 274         phd->pane.expanded = expanded;
 275
 276         phd->histogram = histogram_new();
 277
 278         histogram_set_channel(phd->histogram, histogram_channel);
 279         histogram_set_mode(phd->histogram, histogram_mode);
 280
 281         phd->widget = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, PREF_PAD_GAP);
 282
 283         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 284         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 285                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 286
 287
 288         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 289
 290         phd->drawing_area = gtk_drawing_area_new();
 291         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 292                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 293
 294         g_signal_connect(G_OBJECT(phd->drawing_area), "draw",
 295                          G_CALLBACK(bar_pane_histogram_draw_cb), phd);
 296
 297         gq_gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 298         gtk_widget_show(phd->drawing_area);
 299         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 300
 301
 302 #ifdef HAVE_GTK4
 303         gesture = gtk_gesture_click_new();
 304         gtk_widget_add_controller(phd->drawing_area, GTK_EVENT_CONTROLLER(gesture));
 305 #else
 306         gesture = gtk_gesture_multi_press_new(phd->drawing_area);
 307 #endif
 308         gtk_gesture_single_set_button(GTK_GESTURE_SINGLE(gesture), MOUSE_BUTTON_RIGHT);
 309         g_signal_connect(gesture, "pressed", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 310
 311         gtk_widget_show(phd->widget);
 312
 313         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 314
 315         return phd->widget;
 316 }
 317
 318 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 319 {
 320         gchar *title = nullptr;
 321         gchar *id = g_strdup("histogram");
 322         gboolean expanded = TRUE;
 323         gint height = 80;
 324         gint histogram_channel = HCHAN_RGB;
 325         gint histogram_mode = 0;
 326         GtkWidget *ret;
 327
 328         while (*attribute_names)
 329                 {
 330                 const gchar *option = *attribute_names++;
 331                 const gchar *value = *attribute_values++;
 332
 333                 if (READ_CHAR_FULL("id", id)) continue;
 334                 if (READ_CHAR_FULL("title", title)) continue;
 335                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 336                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 337                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 338
 339                 log_printf("unknown attribute %s = %s\n", option, value);
 340                 }
 341
 342         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 343         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 344         g_free(title);
 345         g_free(id);
 346         return ret;
 347 }
 348
 349 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 350 {
 351         PaneHistogramData *phd;
 352
 353         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 354         if (!phd) return;
 355
 356         gint histogram_channel = phd->histogram->histogram_channel;
 357         gint histogram_mode = phd->histogram->histogram_mode;
 358
 359         while (*attribute_names)
 360                 {
 361                 const gchar *option = *attribute_names++;
 362                 const gchar *value = *attribute_values++;
 363
 364                 if (READ_CHAR_FULL("id", phd->pane.id)) continue;
 365                 if (READ_BOOL_FULL("expanded", phd->pane.expanded)) continue;
 366                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 367                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 368
 369
 370                 log_printf("unknown attribute %s = %s\n", option, value);
 371                 }
 372
 373         histogram_set_channel(phd->histogram, histogram_channel);
 374         histogram_set_mode(phd->histogram, histogram_mode);
 375
 376         bar_update_expander(pane);
 377         bar_pane_histogram_update(phd);
 378 }
 379
 380
 381 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */