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_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         cairo_t *cr = gdk_cairo_create(gtk_widget_get_window(widget));
 160         gdk_cairo_set_source_pixbuf (cr, phd->pixbuf, 0, 0);
 161         cairo_paint (cr);
 162         cairo_destroy (cr);
 163
 164         return TRUE;
 165 }
 166
 167 static void bar_pane_histogram_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
 168 {
 169         PaneHistogramData *phd = data;
 170
 171         phd->histogram_width = allocation->width;
 172         phd->histogram_height = allocation->height;
 173         bar_pane_histogram_update(phd);
 174 }
 175
 176 #if 0
 177 static void bar_pane_histogram_close(GtkWidget *pane)
 178 {
 179         PaneHistogramData *phd;
 180
 181         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 182         if (!phd) return;
 183
 184         gtk_widget_destroy(phd->widget);
 185 }
 186 #endif
 187
 188 static void bar_pane_histogram_destroy(GtkWidget *widget, gpointer data)
 189 {
 190         PaneHistogramData *phd = data;
 191
 192         if (phd->idle_id) g_source_remove(phd->idle_id);
 193         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 194
 195         file_data_unref(phd->fd);
 196         histogram_free(phd->histogram);
 197         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 198         g_free(phd->pane.id);
 199
 200         g_free(phd);
 201 }
 202
 203 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 204 {
 205         PaneHistogramData *phd = data;
 206         gint channel;
 207
 208         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 209
 210         if (!phd) return;
 211
 212         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 213         if (channel == histogram_get_channel(phd->histogram)) return;
 214
 215         histogram_set_channel(phd->histogram, channel);
 216         bar_pane_histogram_update(phd);
 217 }
 218
 219 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 220 {
 221         PaneHistogramData *phd = data;
 222         gint logmode;
 223
 224         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 225
 226         if (!phd) return;
 227
 228         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 229         if (logmode == histogram_get_mode(phd->histogram)) return;
 230
 231         histogram_set_mode(phd->histogram, logmode);
 232         bar_pane_histogram_update(phd);
 233 }
 234
 235 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 236 {
 237         GtkWidget *menu;
 238         gint channel = histogram_get_channel(phd->histogram);
 239         gint mode = histogram_get_mode(phd->histogram);
 240
 241         menu = popup_menu_short_lived();
 242
 243         /* use the same strings as in layout_util.c */
 244         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);
 245         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);
 246         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);
 247         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);
 248         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);
 249
 250         menu_item_add_divider(menu);
 251
 252         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 253         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 254
 255         return menu;
 256 }
 257
 258 static gboolean bar_pane_histogram_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
 259 {
 260         PaneHistogramData *phd = data;
 261
 262         if (bevent->button == MOUSE_BUTTON_RIGHT)
 263                 {
 264                 GtkWidget *menu;
 265
 266                 menu = bar_pane_histogram_menu(phd);
 267                 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
 268                 return TRUE;
 269         }
 270
 271         return FALSE;
 272 }
 273
 274
 275 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 276 {
 277         PaneHistogramData *phd;
 278
 279         phd = g_new0(PaneHistogramData, 1);
 280
 281         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 282         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 283         phd->pane.title = bar_pane_expander_title(title);
 284         phd->pane.id = g_strdup(id);
 285         phd->pane.type = PANE_HISTOGRAM;
 286
 287         phd->pane.expanded = expanded;
 288
 289         phd->histogram = histogram_new();
 290
 291         histogram_set_channel(phd->histogram, histogram_channel);
 292         histogram_set_mode(phd->histogram, histogram_mode);
 293
 294         phd->widget = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 295
 296         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 297         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 298                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 299
 300
 301         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 302
 303         phd->drawing_area = gtk_drawing_area_new();
 304         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 305                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 306
 307         g_signal_connect(G_OBJECT(phd->drawing_area), "expose_event",
 308                          G_CALLBACK(bar_pane_histogram_expose_event_cb), phd);
 309
 310         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 311         gtk_widget_show(phd->drawing_area);
 312         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 313
 314         g_signal_connect(G_OBJECT(phd->drawing_area), "button_press_event", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 315
 316         gtk_widget_show(phd->widget);
 317
 318         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 319
 320         return phd->widget;
 321 }
 322
 323 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 324 {
 325         gchar *title = NULL;
 326         gchar *id = g_strdup("histogram");
 327         gboolean expanded = TRUE;
 328         gint height = 80;
 329         gint histogram_channel = HCHAN_RGB;
 330         gint histogram_mode = 0;
 331         GtkWidget *ret;
 332
 333         while (*attribute_names)
 334                 {
 335                 const gchar *option = *attribute_names++;
 336                 const gchar *value = *attribute_values++;
 337
 338                 if (READ_CHAR_FULL("id", id)) continue;
 339                 if (READ_CHAR_FULL("title", title)) continue;
 340                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 341                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 342                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 343
 344                 log_printf("unknown attribute %s = %s\n", option, value);
 345                 }
 346
 347         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 348         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 349         g_free(title);
 350         g_free(id);
 351         return ret;
 352 }
 353
 354 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 355 {
 356         PaneHistogramData *phd;
 357
 358         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 359         if (!phd) return;
 360
 361         gint histogram_channel = phd->histogram->histogram_channel;
 362         gint histogram_mode = phd->histogram->histogram_mode;
 363
 364         while (*attribute_names)
 365                 {
 366                 const gchar *option = *attribute_names++;
 367                 const gchar *value = *attribute_values++;
 368
 369                 if (READ_CHAR_FULL("id", phd->pane.id)) continue;
 370 //              if (READ_CHAR_FULL("pane.title", title)) continue;
 371                 if (READ_BOOL_FULL("expanded", phd->pane.expanded)) continue;
 372                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 373                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 374
 375
 376                 log_printf("unknown attribute %s = %s\n", option, value);
 377                 }
 378
 379         histogram_set_channel(phd->histogram, histogram_channel);
 380         histogram_set_mode(phd->histogram, histogram_mode);
 381
 382         bar_update_expander(pane);
 383         bar_pane_histogram_update(phd);
 384 }
 385
 386
 387 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */