src/bar_histogram.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 - 2012 The Geeqie Team
   5  *
   6  * Author: Vladimir Nadvornik
   7  *
   8  * This software is released under the GNU General Public License (GNU GPL).
   9  * Please read the included file COPYING for more information.
  10  * This software comes with no warranty of any kind, use at your own risk!
  11  */
  12
  13
  14 #include "main.h"
  15 #include "bar_histogram.h"
  16
  17 #include "bar.h"
  18 #include "metadata.h"
  19 #include "filedata.h"
  20 #include "menu.h"
  21 #include "ui_menu.h"
  22 #include "ui_misc.h"
  23 #include "histogram.h"
  24 #include "rcfile.h"
  25
  26 /*
  27  *-------------------------------------------------------------------
  28  * keyword / comment utils
  29  *-------------------------------------------------------------------
  30  */
  31
  32
  33
  34 typedef struct _PaneHistogramData PaneHistogramData;
  35 struct _PaneHistogramData
  36 {
  37         PaneData pane;
  38         GtkWidget *widget;
  39         GtkWidget *drawing_area;
  40         Histogram *histogram;
  41         gint histogram_width;
  42         gint histogram_height;
  43         GdkPixbuf *pixbuf;
  44         FileData *fd;
  45         gboolean need_update;
  46         guint idle_id; /* event source id */
  47 };
  48
  49 static gboolean bar_pane_histogram_update_cb(gpointer data);
  50
  51
  52 static void bar_pane_histogram_update(PaneHistogramData *phd)
  53 {
  54         if (phd->pixbuf) g_object_unref(phd->pixbuf);
  55         phd->pixbuf = NULL;
  56
  57         gtk_label_set_text(GTK_LABEL(phd->pane.title), histogram_label(phd->histogram));
  58
  59         if (!phd->histogram_width || !phd->histogram_height || !phd->fd) return;
  60
  61         /* histmap_get is relatively expensive, run it only when we really need it
  62            and with lower priority than pixbuf_renderer
  63            FIXME: this does not work for fullscreen*/
  64         if (gtk_widget_is_drawable(phd->drawing_area))
  65                 {
  66                 if (!phd->idle_id)
  67                         {
  68                         phd->idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, bar_pane_histogram_update_cb, phd, NULL);
  69                         }
  70                 }
  71         else
  72                 {
  73                 phd->need_update = TRUE;
  74                 }
  75 }
  76
  77 static gboolean bar_pane_histogram_update_cb(gpointer data)
  78 {
  79         const HistMap *histmap;
  80         PaneHistogramData *phd = data;
  81
  82         phd->idle_id = 0;
  83         phd->need_update = FALSE;
  84
  85         gtk_widget_queue_draw_area(GTK_WIDGET(phd->drawing_area), 0, 0, phd->histogram_width, phd->histogram_height);
  86
  87         if (phd->fd == NULL) return FALSE;
  88         histmap = histmap_get(phd->fd);
  89
  90         if (!histmap)
  91                 {
  92                 histmap_start_idle(phd->fd);
  93                 return FALSE;
  94                 }
  95
  96         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
  97         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
  98         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
  99
 100         return FALSE;
 101 }
 102
 103
 104 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
 105 {
 106         PaneHistogramData *phd;
 107
 108         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 109         if (!phd) return;
 110
 111         file_data_unref(phd->fd);
 112         phd->fd = file_data_ref(fd);
 113
 114         bar_pane_histogram_update(phd);
 115 }
 116
 117 static void bar_pane_histogram_write_config(GtkWidget *pane, GString *outstr, gint indent)
 118 {
 119         PaneHistogramData *phd;
 120
 121         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 122         if (!phd) return;
 123
 124         WRITE_NL(); WRITE_STRING("<pane_histogram ");
 125         write_char_option(outstr, indent, "id", phd->pane.id);
 126         write_char_option(outstr, indent, "title", gtk_label_get_text(GTK_LABEL(phd->pane.title)));
 127         WRITE_BOOL(phd->pane, expanded);
 128         WRITE_INT(*phd->histogram, histogram_channel);
 129         WRITE_INT(*phd->histogram, histogram_mode);
 130         WRITE_STRING("/>");
 131 }
 132
 133 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
 134 {
 135         PaneHistogramData *phd = data;
 136         if ((type & (NOTIFY_REREAD | NOTIFY_CHANGE | NOTIFY_HISTMAP | NOTIFY_PIXBUF)) && fd == phd->fd)
 137                 {
 138                 DEBUG_1("Notify pane_histogram: %s %04x", fd->path, type);
 139                 bar_pane_histogram_update(phd);
 140                 }
 141 }
 142
 143 #if GTK_CHECK_VERSION(3,0,0)
 144 static gboolean bar_pane_histogram_draw_cb(GtkWidget *widget, cairo_t *cr, gpointer data)
 145 {
 146         PaneHistogramData *phd = data;
 147         if (!phd) return TRUE;
 148
 149         if (phd->need_update)
 150                 {
 151                 bar_pane_histogram_update(phd);
 152                 }
 153
 154         if (!phd->pixbuf) return TRUE;
 155
 156         gdk_cairo_set_source_pixbuf(cr, phd->pixbuf, 0, 0);
 157         cairo_paint (cr);
 158
 159         return TRUE;
 160 }
 161
 162 #else
 163 static gboolean bar_pane_histogram_expose_event_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 164 {
 165         PaneHistogramData *phd = data;
 166         if (!phd) return TRUE;
 167
 168         if (phd->need_update)
 169                 {
 170                 bar_pane_histogram_update(phd);
 171                 }
 172
 173         if (!phd->pixbuf) return TRUE;
 174
 175         cairo_t *cr = gdk_cairo_create(gtk_widget_get_window(widget));
 176         gdk_cairo_set_source_pixbuf (cr, phd->pixbuf, 0, 0);
 177         cairo_paint (cr);
 178         cairo_destroy (cr);
 179
 180         return TRUE;
 181 }
 182 #endif
 183
 184 static void bar_pane_histogram_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
 185 {
 186         PaneHistogramData *phd = data;
 187
 188         phd->histogram_width = allocation->width;
 189         phd->histogram_height = allocation->height;
 190         bar_pane_histogram_update(phd);
 191 }
 192
 193 static void bar_pane_histogram_destroy(GtkWidget *widget, gpointer data)
 194 {
 195         PaneHistogramData *phd = data;
 196
 197         if (phd->idle_id) g_source_remove(phd->idle_id);
 198         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 199
 200         file_data_unref(phd->fd);
 201         histogram_free(phd->histogram);
 202         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 203         g_free(phd->pane.id);
 204
 205         g_free(phd);
 206 }
 207
 208 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 209 {
 210         PaneHistogramData *phd = data;
 211         gint channel;
 212
 213         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 214
 215         if (!phd) return;
 216
 217         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 218         if (channel == histogram_get_channel(phd->histogram)) return;
 219
 220         histogram_set_channel(phd->histogram, channel);
 221         bar_pane_histogram_update(phd);
 222 }
 223
 224 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 225 {
 226         PaneHistogramData *phd = data;
 227         gint logmode;
 228
 229         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 230
 231         if (!phd) return;
 232
 233         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 234         if (logmode == histogram_get_mode(phd->histogram)) return;
 235
 236         histogram_set_mode(phd->histogram, logmode);
 237         bar_pane_histogram_update(phd);
 238 }
 239
 240 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 241 {
 242         GtkWidget *menu;
 243         gint channel = histogram_get_channel(phd->histogram);
 244         gint mode = histogram_get_mode(phd->histogram);
 245
 246         menu = popup_menu_short_lived();
 247
 248         /* use the same strings as in layout_util.c */
 249         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);
 250         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);
 251         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);
 252         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);
 253         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);
 254
 255         menu_item_add_divider(menu);
 256
 257         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 258         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 259
 260         return menu;
 261 }
 262
 263 static gboolean bar_pane_histogram_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
 264 {
 265         PaneHistogramData *phd = data;
 266
 267         if (bevent->button == MOUSE_BUTTON_RIGHT)
 268                 {
 269                 GtkWidget *menu;
 270
 271                 menu = bar_pane_histogram_menu(phd);
 272                 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
 273                 return TRUE;
 274         }
 275
 276         return FALSE;
 277 }
 278
 279
 280 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 281 {
 282         PaneHistogramData *phd;
 283
 284         phd = g_new0(PaneHistogramData, 1);
 285
 286         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 287         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 288         phd->pane.title = bar_pane_expander_title(title);
 289         phd->pane.id = g_strdup(id);
 290         phd->pane.type = PANE_HISTOGRAM;
 291
 292         phd->pane.expanded = expanded;
 293
 294         phd->histogram = histogram_new();
 295
 296         histogram_set_channel(phd->histogram, histogram_channel);
 297         histogram_set_mode(phd->histogram, histogram_mode);
 298
 299         phd->widget = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 300
 301         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 302         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 303                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 304
 305
 306         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 307
 308         phd->drawing_area = gtk_drawing_area_new();
 309         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 310                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 311
 312 #if GTK_CHECK_VERSION(3,0,0)
 313         g_signal_connect(G_OBJECT(phd->drawing_area), "draw",
 314                          G_CALLBACK(bar_pane_histogram_draw_cb), phd);
 315 #else
 316         g_signal_connect(G_OBJECT(phd->drawing_area), "expose_event",
 317                          G_CALLBACK(bar_pane_histogram_expose_event_cb), phd);
 318 #endif
 319
 320         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 321         gtk_widget_show(phd->drawing_area);
 322         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 323
 324         g_signal_connect(G_OBJECT(phd->drawing_area), "button_press_event", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 325
 326         gtk_widget_show(phd->widget);
 327
 328         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 329
 330         return phd->widget;
 331 }
 332
 333 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 334 {
 335         gchar *title = NULL;
 336         gchar *id = g_strdup("histogram");
 337         gboolean expanded = TRUE;
 338         gint height = 80;
 339         gint histogram_channel = HCHAN_RGB;
 340         gint histogram_mode = 0;
 341         GtkWidget *ret;
 342
 343         while (*attribute_names)
 344                 {
 345                 const gchar *option = *attribute_names++;
 346                 const gchar *value = *attribute_values++;
 347
 348                 if (READ_CHAR_FULL("id", id)) continue;
 349                 if (READ_CHAR_FULL("title", title)) continue;
 350                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 351                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 352                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 353
 354                 log_printf("unknown attribute %s = %s\n", option, value);
 355                 }
 356
 357         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 358         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 359         g_free(title);
 360         g_free(id);
 361         return ret;
 362 }
 363
 364 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 365 {
 366         PaneHistogramData *phd;
 367
 368         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 369         if (!phd) return;
 370
 371         gint histogram_channel = phd->histogram->histogram_channel;
 372         gint histogram_mode = phd->histogram->histogram_mode;
 373
 374         while (*attribute_names)
 375                 {
 376                 const gchar *option = *attribute_names++;
 377                 const gchar *value = *attribute_values++;
 378
 379                 if (READ_CHAR_FULL("id", phd->pane.id)) continue;
 380 //              if (READ_CHAR_FULL("pane.title", title)) continue;
 381                 if (READ_BOOL_FULL("expanded", phd->pane.expanded)) continue;
 382                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 383                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 384
 385
 386                 log_printf("unknown attribute %s = %s\n", option, value);
 387                 }
 388
 389         histogram_set_channel(phd->histogram, histogram_channel);
 390         histogram_set_mode(phd->histogram, histogram_mode);
 391
 392         bar_update_expander(pane);
 393         bar_pane_histogram_update(phd);
 394 }
 395
 396
 397 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */