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 <cairo.h>
  25 #include <gdk-pixbuf/gdk-pixbuf.h>
  26 #include <gdk/gdk.h>
  27 #include <glib-object.h>
  28
  29 #include <config.h>
  30
  31 #include "bar.h"
  32 #include "compat.h"
  33 #include "debug.h"
  34 #include "filedata.h"
  35 #include "histogram.h"
  36 #include "intl.h"
  37 #include "rcfile.h"
  38 #include "typedefs.h"
  39 #include "ui-menu.h"
  40 #include "ui-misc.h"
  41
  42 struct HistMap;
  43
  44 /*
  45  *-------------------------------------------------------------------
  46  * keyword / comment utils
  47  *-------------------------------------------------------------------
  48  */
  49
  50
  51
  52 struct PaneHistogramData
  53 {
  54         PaneData pane;
  55         GtkWidget *widget;
  56         GtkWidget *drawing_area;
  57         Histogram *histogram;
  58         gint histogram_width;
  59         gint histogram_height;
  60         GdkPixbuf *pixbuf;
  61         FileData *fd;
  62         gboolean need_update;
  63         guint idle_id; /* event source id */
  64 };
  65
  66 static gboolean bar_pane_histogram_update_cb(gpointer data);
  67
  68
  69 static void bar_pane_histogram_update(PaneHistogramData *phd)
  70 {
  71         if (phd->pixbuf) g_object_unref(phd->pixbuf);
  72         phd->pixbuf = nullptr;
  73
  74         gtk_label_set_text(GTK_LABEL(phd->pane.title), histogram_label(phd->histogram));
  75
  76         if (!phd->histogram_width || !phd->histogram_height || !phd->fd) return;
  77
  78         /** histmap_get is relatively expensive, run it only when we really need it
  79            and with lower priority than pixbuf_renderer
  80            @FIXME this does not work for fullscreen */
  81         if (gtk_widget_is_drawable(phd->drawing_area))
  82                 {
  83                 if (!phd->idle_id)
  84                         {
  85                         phd->idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, bar_pane_histogram_update_cb, phd, nullptr);
  86                         }
  87                 }
  88         else
  89                 {
  90                 phd->need_update = TRUE;
  91                 }
  92 }
  93
  94 static gboolean bar_pane_histogram_update_cb(gpointer data)
  95 {
  96         const HistMap *histmap;
  97         auto phd = static_cast<PaneHistogramData *>(data);
  98
  99         phd->idle_id = 0;
 100         phd->need_update = FALSE;
 101
 102         gq_gtk_widget_queue_draw_area(GTK_WIDGET(phd->drawing_area), 0, 0, phd->histogram_width, phd->histogram_height);
 103
 104         if (phd->fd == nullptr) return G_SOURCE_REMOVE;
 105         histmap = histmap_get(phd->fd);
 106
 107         if (!histmap)
 108                 {
 109                 histmap_start_idle(phd->fd);
 110                 return G_SOURCE_REMOVE;
 111                 }
 112
 113         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
 114         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
 115         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
 116
 117         return G_SOURCE_REMOVE;
 118 }
 119
 120
 121 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
 122 {
 123         PaneHistogramData *phd;
 124
 125         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 126         if (!phd) return;
 127
 128         file_data_unref(phd->fd);
 129         phd->fd = file_data_ref(fd);
 130
 131         bar_pane_histogram_update(phd);
 132 }
 133
 134 static void bar_pane_histogram_write_config(GtkWidget *pane, GString *outstr, gint indent)
 135 {
 136         PaneHistogramData *phd;
 137
 138         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 139         if (!phd) return;
 140
 141         WRITE_NL(); WRITE_STRING("<pane_histogram ");
 142         write_char_option(outstr, indent, "id", phd->pane.id);
 143         write_char_option(outstr, indent, "title", gtk_label_get_text(GTK_LABEL(phd->pane.title)));
 144         WRITE_BOOL(phd->pane, expanded);
 145         WRITE_INT(*phd->histogram, histogram_channel);
 146         WRITE_INT(*phd->histogram, histogram_mode);
 147         WRITE_STRING("/>");
 148 }
 149
 150 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
 151 {
 152         auto phd = static_cast<PaneHistogramData *>(data);
 153         if ((type & (NOTIFY_REREAD | NOTIFY_CHANGE | NOTIFY_HISTMAP | NOTIFY_PIXBUF)) && fd == phd->fd)
 154                 {
 155                 DEBUG_1("Notify pane_histogram: %s %04x", fd->path, type);
 156                 bar_pane_histogram_update(phd);
 157                 }
 158 }
 159
 160 static gboolean bar_pane_histogram_draw_cb(GtkWidget *, cairo_t *cr, gpointer data)
 161 {
 162         auto phd = static_cast<PaneHistogramData *>(data);
 163         if (!phd) return TRUE;
 164
 165         if (phd->need_update)
 166                 {
 167                 bar_pane_histogram_update(phd);
 168                 }
 169
 170         if (!phd->pixbuf) return TRUE;
 171
 172         gdk_cairo_set_source_pixbuf(cr, phd->pixbuf, 0, 0);
 173         cairo_paint (cr);
 174
 175         return TRUE;
 176 }
 177
 178 static void bar_pane_histogram_size_cb(GtkWidget *, GtkAllocation *allocation, gpointer data)
 179 {
 180         auto phd = static_cast<PaneHistogramData *>(data);
 181
 182         phd->histogram_width = allocation->width;
 183         phd->histogram_height = allocation->height;
 184         bar_pane_histogram_update(phd);
 185 }
 186
 187 static void bar_pane_histogram_destroy(GtkWidget *, gpointer data)
 188 {
 189         auto phd = static_cast<PaneHistogramData *>(data);
 190
 191         if (phd->idle_id) g_source_remove(phd->idle_id);
 192         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 193
 194         file_data_unref(phd->fd);
 195         histogram_free(phd->histogram);
 196         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 197         g_free(phd->pane.id);
 198
 199         g_free(phd);
 200 }
 201
 202 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 203 {
 204         auto phd = static_cast<PaneHistogramData *>(data);
 205         gint channel;
 206
 207         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 208
 209         if (!phd) return;
 210
 211         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 212         if (channel == histogram_get_channel(phd->histogram)) return;
 213
 214         histogram_set_channel(phd->histogram, channel);
 215         bar_pane_histogram_update(phd);
 216 }
 217
 218 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 219 {
 220         auto phd = static_cast<PaneHistogramData *>(data);
 221         gint logmode;
 222
 223         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 224
 225         if (!phd) return;
 226
 227         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 228         if (logmode == histogram_get_mode(phd->histogram)) return;
 229
 230         histogram_set_mode(phd->histogram, logmode);
 231         bar_pane_histogram_update(phd);
 232 }
 233
 234 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 235 {
 236         GtkWidget *menu;
 237         gint channel = histogram_get_channel(phd->histogram);
 238         gint mode = histogram_get_mode(phd->histogram);
 239
 240         menu = popup_menu_short_lived();
 241
 242         /* use the same strings as in layout-util.cc */
 243         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);
 244         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);
 245         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);
 246         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);
 247         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);
 248
 249         menu_item_add_divider(menu);
 250
 251         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 252         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 253
 254         return menu;
 255 }
 256
 257 static gboolean bar_pane_histogram_press_cb(GtkGesture *, gint, gdouble, gdouble, gpointer data)
 258 {
 259         auto phd = static_cast<PaneHistogramData *>(data);
 260         GtkWidget *menu;
 261
 262         menu = bar_pane_histogram_menu(phd);
 263         gtk_menu_popup_at_pointer(GTK_MENU(menu), nullptr);
 264
 265         return TRUE;
 266 }
 267
 268
 269 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 270 {
 271         PaneHistogramData *phd;
 272         GtkGesture *gesture;
 273
 274         phd = g_new0(PaneHistogramData, 1);
 275
 276         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 277         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 278         phd->pane.title = bar_pane_expander_title(title);
 279         phd->pane.id = g_strdup(id);
 280         phd->pane.type = PANE_HISTOGRAM;
 281
 282         phd->pane.expanded = expanded;
 283
 284         phd->histogram = histogram_new();
 285
 286         histogram_set_channel(phd->histogram, histogram_channel);
 287         histogram_set_mode(phd->histogram, histogram_mode);
 288
 289         phd->widget = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, PREF_PAD_GAP);
 290
 291         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 292         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 293                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 294
 295
 296         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 297
 298         phd->drawing_area = gtk_drawing_area_new();
 299         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 300                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 301
 302         g_signal_connect(G_OBJECT(phd->drawing_area), "draw",
 303                          G_CALLBACK(bar_pane_histogram_draw_cb), phd);
 304
 305         gq_gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 306         gtk_widget_show(phd->drawing_area);
 307         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 308
 309
 310 #if HAVE_GTK4
 311         gesture = gtk_gesture_click_new();
 312         gtk_widget_add_controller(phd->drawing_area, GTK_EVENT_CONTROLLER(gesture));
 313 #else
 314         gesture = gtk_gesture_multi_press_new(phd->drawing_area);
 315 #endif
 316         gtk_gesture_single_set_button(GTK_GESTURE_SINGLE(gesture), MOUSE_BUTTON_RIGHT);
 317         g_signal_connect(gesture, "pressed", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 318
 319         gtk_widget_show(phd->widget);
 320
 321         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 322
 323         return phd->widget;
 324 }
 325
 326 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 327 {
 328         gchar *title = nullptr;
 329         gchar *id = g_strdup("histogram");
 330         gboolean expanded = TRUE;
 331         gint height = 80;
 332         gint histogram_channel = HCHAN_RGB;
 333         gint histogram_mode = 0;
 334         GtkWidget *ret;
 335
 336         while (*attribute_names)
 337                 {
 338                 const gchar *option = *attribute_names++;
 339                 const gchar *value = *attribute_values++;
 340
 341                 if (READ_CHAR_FULL("id", id)) continue;
 342                 if (READ_CHAR_FULL("title", title)) continue;
 343                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 344                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 345                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 346
 347                 log_printf("unknown attribute %s = %s\n", option, value);
 348                 }
 349
 350         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 351         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 352         g_free(title);
 353         g_free(id);
 354         return ret;
 355 }
 356
 357 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 358 {
 359         PaneHistogramData *phd;
 360
 361         phd = static_cast<PaneHistogramData *>(g_object_get_data(G_OBJECT(pane), "pane_data"));
 362         if (!phd) return;
 363
 364         gint histogram_channel = phd->histogram->histogram_channel;
 365         gint histogram_mode = phd->histogram->histogram_mode;
 366
 367         while (*attribute_names)
 368                 {
 369                 const gchar *option = *attribute_names++;
 370                 const gchar *value = *attribute_values++;
 371
 372                 if (READ_CHAR_FULL("id", phd->pane.id)) continue;
 373                 if (READ_BOOL_FULL("expanded", phd->pane.expanded)) continue;
 374                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 375                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 376
 377
 378                 log_printf("unknown attribute %s = %s\n", option, value);
 379                 }
 380
 381         histogram_set_channel(phd->histogram, histogram_channel);
 382         histogram_set_mode(phd->histogram, histogram_mode);
 383
 384         bar_update_expander(pane);
 385         bar_pane_histogram_update(phd);
 386 }
 387
 388
 389 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */