src/bar_histogram.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 - 2009 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_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 static gboolean bar_pane_histogram_expose_event_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 144 {
 145         PaneHistogramData *phd = data;
 146         if (!phd) return TRUE;
 147
 148         if (phd->need_update)
 149                 {
 150                 bar_pane_histogram_update(phd);
 151                 }
 152
 153         if (!phd->pixbuf) return TRUE;
 154
 155         gdk_draw_pixbuf(widget->window,
 156                         widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
 157                         phd->pixbuf,
 158                         0, 0,
 159                         0, 0,
 160                         -1, -1,
 161                         GDK_RGB_DITHER_NORMAL, 0, 0);
 162         return TRUE;
 163 }
 164
 165 static void bar_pane_histogram_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
 166 {
 167         PaneHistogramData *phd = data;
 168
 169         phd->histogram_width = allocation->width;
 170         phd->histogram_height = allocation->height;
 171         bar_pane_histogram_update(phd);
 172 }
 173
 174 static void bar_pane_histogram_close(GtkWidget *pane)
 175 {
 176         PaneHistogramData *phd;
 177
 178         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 179         if (!phd) return;
 180
 181         gtk_widget_destroy(phd->widget);
 182 }
 183
 184 static void bar_pane_histogram_destroy(GtkWidget *widget, gpointer data)
 185 {
 186         PaneHistogramData *phd = data;
 187
 188         if (phd->idle_id) g_source_remove(phd->idle_id);
 189         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 190
 191         file_data_unref(phd->fd);
 192         histogram_free(phd->histogram);
 193         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 194         g_free(phd->pane.id);
 195
 196         g_free(phd);
 197 }
 198
 199 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 200 {
 201         PaneHistogramData *phd = data;
 202         gint channel;
 203
 204         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 205
 206         if (!phd) return;
 207
 208         channel = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 209         if (channel == histogram_get_channel(phd->histogram)) return;
 210
 211         histogram_set_channel(phd->histogram, channel);
 212         bar_pane_histogram_update(phd);
 213 }
 214
 215 static void bar_pane_histogram_popup_mode_cb(GtkWidget *widget, gpointer data)
 216 {
 217         PaneHistogramData *phd = data;
 218         gint logmode;
 219
 220         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 221
 222         if (!phd) return;
 223
 224         logmode = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(widget), "menu_item_radio_data"));
 225         if (logmode == histogram_get_mode(phd->histogram)) return;
 226
 227         histogram_set_mode(phd->histogram, logmode);
 228         bar_pane_histogram_update(phd);
 229 }
 230
 231 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 232 {
 233         GtkWidget *menu;
 234         gint channel = histogram_get_channel(phd->histogram);
 235         gint mode = histogram_get_mode(phd->histogram);
 236
 237         menu = popup_menu_short_lived();
 238
 239         /* use the same strings as in layout_util.c */
 240         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);
 241         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);
 242         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);
 243         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);
 244         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);
 245
 246         menu_item_add_divider(menu);
 247
 248         menu_item_add_radio(menu, _("Li_near Histogram"), GINT_TO_POINTER(0), (mode == 0), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 249         menu_item_add_radio(menu, _("L_og Histogram"),    GINT_TO_POINTER(1), (mode == 1), G_CALLBACK(bar_pane_histogram_popup_mode_cb), phd);
 250
 251         return menu;
 252 }
 253
 254 static gboolean bar_pane_histogram_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
 255 {
 256         PaneHistogramData *phd = data;
 257
 258         if (bevent->button == MOUSE_BUTTON_RIGHT)
 259                 {
 260                 GtkWidget *menu;
 261
 262                 menu = bar_pane_histogram_menu(phd);
 263                 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
 264                 return TRUE;
 265         }
 266
 267         return FALSE;
 268 }
 269
 270
 271 static GtkWidget *bar_pane_histogram_new(const gchar *id, const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 272 {
 273         PaneHistogramData *phd;
 274
 275         phd = g_new0(PaneHistogramData, 1);
 276
 277         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 278         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 279         phd->pane.title = bar_pane_expander_title(title);
 280         phd->pane.id = g_strdup(id);
 281         phd->pane.type = PANE_HISTOGRAM;
 282
 283         phd->pane.expanded = expanded;
 284
 285         phd->histogram = histogram_new();
 286
 287         histogram_set_channel(phd->histogram, histogram_channel);
 288         histogram_set_mode(phd->histogram, histogram_mode);
 289
 290         phd->widget = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 291
 292         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 293         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 294                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 295
 296
 297         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 298
 299         phd->drawing_area = gtk_drawing_area_new();
 300         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 301                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 302
 303         g_signal_connect(G_OBJECT(phd->drawing_area), "expose_event",
 304                          G_CALLBACK(bar_pane_histogram_expose_event_cb), phd);
 305
 306         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 307         gtk_widget_show(phd->drawing_area);
 308         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 309
 310         g_signal_connect(G_OBJECT(phd->drawing_area), "button_press_event", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 311
 312         gtk_widget_show(phd->widget);
 313
 314         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 315
 316         return phd->widget;
 317 }
 318
 319 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 320 {
 321         gchar *title = NULL;
 322         gchar *id = g_strdup("histogram");
 323         gboolean expanded = TRUE;
 324         gint height = 80;
 325         gint histogram_channel = HCHAN_RGB;
 326         gint histogram_mode = 0;
 327         GtkWidget *ret;
 328
 329         while (*attribute_names)
 330                 {
 331                 const gchar *option = *attribute_names++;
 332                 const gchar *value = *attribute_values++;
 333
 334                 if (READ_CHAR_FULL("id", id)) continue;
 335                 if (READ_CHAR_FULL("title", title)) continue;
 336                 if (READ_BOOL_FULL("expanded", expanded)) continue;
 337                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 338                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 339
 340                 log_printf("unknown attribute %s = %s\n", option, value);
 341                 }
 342
 343         bar_pane_translate_title(PANE_HISTOGRAM, id, &title);
 344         ret = bar_pane_histogram_new(id, title, height, expanded, histogram_channel, histogram_mode);
 345         g_free(title);
 346         g_free(id);
 347         return ret;
 348 }
 349
 350 void bar_pane_histogram_update_from_config(GtkWidget *pane, const gchar **attribute_names, const gchar **attribute_values)
 351 {
 352         PaneHistogramData *phd;
 353
 354         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 355         if (!phd) return;
 356
 357         gint histogram_channel = phd->histogram->histogram_channel;
 358         gint histogram_mode = phd->histogram->histogram_mode;
 359
 360         while (*attribute_names)
 361                 {
 362                 const gchar *option = *attribute_names++;
 363                 const gchar *value = *attribute_values++;
 364
 365                 if (READ_CHAR_FULL("id", phd->pane.id)) continue;
 366 //              if (READ_CHAR_FULL("pane.title", title)) continue;
 367                 if (READ_BOOL_FULL("expanded", phd->pane.expanded)) continue;
 368                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 369                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 370
 371
 372                 log_printf("unknown attribute %s = %s\n", option, value);
 373                 }
 374
 375         histogram_set_channel(phd->histogram, histogram_channel);
 376         histogram_set_mode(phd->histogram, histogram_mode);
 377
 378         bar_update_expander(pane);
 379         bar_pane_histogram_update(phd);
 380 }
 381
 382
 383 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */