src/bar_histogram.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 - 2010 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_CHECK_VERSION(2,20,0)
  65         if (gtk_widget_is_drawable(phd->drawing_area))
  66 #else
  67         if (GTK_WIDGET_DRAWABLE(phd->drawing_area))
  68 #endif
  69                 {
  70                 if (!phd->idle_id)
  71                         {
  72                         phd->idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, bar_pane_histogram_update_cb, phd, NULL);
  73                         }
  74                 }
  75         else
  76                 {
  77                 phd->need_update = TRUE;
  78                 }
  79 }
  80
  81 static gboolean bar_pane_histogram_update_cb(gpointer data)
  82 {
  83         const HistMap *histmap;
  84         PaneHistogramData *phd = data;
  85
  86         phd->idle_id = 0;
  87         phd->need_update = FALSE;
  88
  89         gtk_widget_queue_draw_area(GTK_WIDGET(phd->drawing_area), 0, 0, phd->histogram_width, phd->histogram_height);
  90
  91         if (phd->fd == NULL) return FALSE;
  92         histmap = histmap_get(phd->fd);
  93
  94         if (!histmap)
  95                 {
  96                 histmap_start_idle(phd->fd);
  97                 return FALSE;
  98                 }
  99
 100         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
 101         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
 102         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
 103
 104         return FALSE;
 105 }
 106
 107
 108 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
 109 {
 110         PaneHistogramData *phd;
 111
 112         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 113         if (!phd) return;
 114
 115         file_data_unref(phd->fd);
 116         phd->fd = file_data_ref(fd);
 117
 118         bar_pane_histogram_update(phd);
 119 }
 120
 121 static void bar_pane_histogram_write_config(GtkWidget *pane, GString *outstr, gint indent)
 122 {
 123         PaneHistogramData *phd;
 124
 125         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 126         if (!phd) return;
 127
 128         WRITE_NL(); WRITE_STRING("<pane_histogram ");
 129         write_char_option(outstr, indent, "id", phd->pane.id);
 130         write_char_option(outstr, indent, "title", gtk_label_get_text(GTK_LABEL(phd->pane.title)));
 131         WRITE_BOOL(phd->pane, expanded);
 132         WRITE_INT(*phd->histogram, histogram_channel);
 133         WRITE_INT(*phd->histogram, histogram_mode);
 134         WRITE_STRING("/>");
 135 }
 136
 137 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
 138 {
 139         PaneHistogramData *phd = data;
 140         if ((type & (NOTIFY_REREAD | NOTIFY_CHANGE | NOTIFY_HISTMAP | NOTIFY_PIXBUF)) && fd == phd->fd)
 141                 {
 142                 DEBUG_1("Notify pane_histogram: %s %04x", fd->path, type);
 143                 bar_pane_histogram_update(phd);
 144                 }
 145 }
 146
 147 static gboolean bar_pane_histogram_expose_event_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 148 {
 149         PaneHistogramData *phd = data;
 150         if (!phd) return TRUE;
 151
 152         if (phd->need_update)
 153                 {
 154                 bar_pane_histogram_update(phd);
 155                 }
 156
 157         if (!phd->pixbuf) return TRUE;
 158
 159         gdk_draw_pixbuf(widget->window,
 160 #if GTK_CHECK_VERSION(2,20,0)
 161                         widget->style->fg_gc[gtk_widget_get_state(widget)],
 162 #else
 163                         widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
 164 #endif
 165                         phd->pixbuf,
 166                         0, 0,
 167                         0, 0,
 168                         -1, -1,
 169                         GDK_RGB_DITHER_NORMAL, 0, 0);
 170         return TRUE;
 171 }
 172
 173 static void bar_pane_histogram_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
 174 {
 175         PaneHistogramData *phd = data;
 176
 177         phd->histogram_width = allocation->width;
 178         phd->histogram_height = allocation->height;
 179         bar_pane_histogram_update(phd);
 180 }
 181
 182 #if 0
 183 static void bar_pane_histogram_close(GtkWidget *pane)
 184 {
 185         PaneHistogramData *phd;
 186
 187         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 188         if (!phd) return;
 189
 190         gtk_widget_destroy(phd->widget);
 191 }
 192 #endif
 193
 194 static void bar_pane_histogram_destroy(GtkWidget *widget, gpointer data)
 195 {
 196         PaneHistogramData *phd = data;
 197
 198         if (phd->idle_id) g_source_remove(phd->idle_id);
 199         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 200
 201         file_data_unref(phd->fd);
 202         histogram_free(phd->histogram);
 203         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 204         g_free(phd->pane.id);
 205
 206         g_free(phd);
 207 }
 208
 209 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 210 {
 211         PaneHistogramData *phd = data;
 212         gint channel;
 213
 214         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 215
 216         if (!phd) return;
 217
 218         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 219         if (channel == histogram_get_channel(phd->histogram)) return;
 220
 221         histogram_set_channel(phd->histogram, channel);
 222         bar_pane_histogram_update(phd);
 223 }
 224
 225 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 226 {
 227         PaneHistogramData *phd = data;
 228         gint logmode;
 229
 230         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 231
 232         if (!phd) return;
 233
 234         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 235         if (logmode == histogram_get_mode(phd->histogram)) return;
 236
 237         histogram_set_mode(phd->histogram, logmode);
 238         bar_pane_histogram_update(phd);
 239 }
 240
 241 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 242 {
 243         GtkWidget *menu;
 244         gint channel = histogram_get_channel(phd->histogram);
 245         gint mode = histogram_get_mode(phd->histogram);
 246
 247         menu = popup_menu_short_lived();
 248
 249         /* use the same strings as in layout_util.c */
 250         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);
 251         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);
 252         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);
 253         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);
 254         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);
 255
 256         menu_item_add_divider(menu);
 257
 258         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 259         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 260
 261         return menu;
 262 }
 263
 264 static gboolean bar_pane_histogram_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
 265 {
 266         PaneHistogramData *phd = data;
 267
 268         if (bevent->button == MOUSE_BUTTON_RIGHT)
 269                 {
 270                 GtkWidget *menu;
 271
 272                 menu = bar_pane_histogram_menu(phd);
 273                 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
 274                 return TRUE;
 275         }
 276
 277         return FALSE;
 278 }
 279
 280
 281 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 282 {
 283         PaneHistogramData *phd;
 284
 285         phd = g_new0(PaneHistogramData, 1);
 286
 287         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 288         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 289         phd->pane.title = bar_pane_expander_title(title);
 290         phd->pane.id = g_strdup(id);
 291         phd->pane.type = PANE_HISTOGRAM;
 292
 293         phd->pane.expanded = expanded;
 294
 295         phd->histogram = histogram_new();
 296
 297         histogram_set_channel(phd->histogram, histogram_channel);
 298         histogram_set_mode(phd->histogram, histogram_mode);
 299
 300         phd->widget = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 301
 302         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 303         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 304                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 305
 306
 307         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 308
 309         phd->drawing_area = gtk_drawing_area_new();
 310         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 311                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 312
 313         g_signal_connect(G_OBJECT(phd->drawing_area), "expose_event",
 314                          G_CALLBACK(bar_pane_histogram_expose_event_cb), phd);
 315
 316         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 317         gtk_widget_show(phd->drawing_area);
 318         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 319
 320         g_signal_connect(G_OBJECT(phd->drawing_area), "button_press_event", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 321
 322         gtk_widget_show(phd->widget);
 323
 324         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 325
 326         return phd->widget;
 327 }
 328
 329 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 330 {
 331         gchar *title = NULL;
 332         gchar *id = g_strdup("histogram");
 333         gboolean expanded = TRUE;
 334         gint height = 80;
 335         gint histogram_channel = HCHAN_RGB;
 336         gint histogram_mode = 0;
 337         GtkWidget *ret;
 338
 339         while (*attribute_names)
 340                 {
 341                 const gchar *option = *attribute_names++;
 342                 const gchar *value = *attribute_values++;
 343
 344                 if (READ_CHAR_FULL("id", id)) continue;
 345                 if (READ_CHAR_FULL("title", title)) continue;
 346                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 347                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 348                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 349
 350                 log_printf("unknown attribute %s = %s\n", option, value);
 351                 }
 352
 353         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 354         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 355         g_free(title);
 356         g_free(id);
 357         return ret;
 358 }
 359
 360 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 361 {
 362         PaneHistogramData *phd;
 363
 364         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 365         if (!phd) return;
 366
 367         gint histogram_channel = phd->histogram->histogram_channel;
 368         gint histogram_mode = phd->histogram->histogram_mode;
 369
 370         while (*attribute_names)
 371                 {
 372                 const gchar *option = *attribute_names++;
 373                 const gchar *value = *attribute_values++;
 374
 375                 if (READ_CHAR_FULL("id", phd->pane.id)) continue;
 376 //              if (READ_CHAR_FULL("pane.title", title)) continue;
 377                 if (READ_BOOL_FULL("expanded", phd->pane.expanded)) continue;
 378                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 379                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 380
 381
 382                 log_printf("unknown attribute %s = %s\n", option, value);
 383                 }
 384
 385         histogram_set_channel(phd->histogram, histogram_channel);
 386         histogram_set_mode(phd->histogram, histogram_mode);
 387
 388         bar_update_expander(pane);
 389         bar_pane_histogram_update(phd);
 390 }
 391
 392
 393 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */