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         gint idle_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 == -1) phd->idle_id = g_idle_add_full(G_PRIORITY_DEFAULT_IDLE, bar_pane_histogram_update_cb, phd, NULL);
  67                 }
  68         else
  69                 {
  70                 phd->need_update = TRUE;
  71                 }
  72 }
  73
  74 static gboolean bar_pane_histogram_update_cb(gpointer data)
  75 {
  76         const HistMap *histmap;
  77         PaneHistogramData *phd = data;
  78
  79         phd->idle_id = -1;
  80         phd->need_update = FALSE;
  81
  82         gtk_widget_queue_draw_area(GTK_WIDGET(phd->drawing_area), 0, 0, phd->histogram_width, phd->histogram_height);
  83
  84         histmap = histmap_get(phd->fd);
  85
  86         if (!histmap) return FALSE;
  87
  88         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
  89         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
  90         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
  91
  92         return FALSE;
  93 }
  94
  95
  96 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
  97 {
  98         PaneHistogramData *phd;
  99
 100         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 101         if (!phd) return;
 102
 103         file_data_unref(phd->fd);
 104         phd->fd = file_data_ref(fd);
 105
 106         bar_pane_histogram_update(phd);
 107 }
 108
 109 static void bar_pane_histogram_write_config(GtkWidget *pane, GString *outstr, gint indent)
 110 {
 111         PaneHistogramData *phd;
 112
 113         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 114         if (!phd) return;
 115
 116         WRITE_STRING("<pane_histogram\n");
 117         indent++;
 118         write_char_option(outstr, indent, "pane.title", gtk_label_get_text(GTK_LABEL(phd->pane.title)));
 119         WRITE_BOOL(*phd, pane.expanded);
 120         WRITE_INT(*phd->histogram, histogram_channel);
 121         WRITE_INT(*phd->histogram, histogram_mode);
 122         indent--;
 123         WRITE_STRING("/>\n");
 124 }
 125
 126
 127 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
 128 {
 129         PaneHistogramData *phd = data;
 130         if (fd == phd->fd) bar_pane_histogram_update(phd);
 131 }
 132
 133 static gboolean bar_pane_histogram_expose_event_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 134 {
 135         PaneHistogramData *phd = data;
 136         if (!phd) return TRUE;
 137
 138         if (phd->need_update)
 139                 {
 140                 bar_pane_histogram_update(phd);
 141                 }
 142
 143         if (!phd->pixbuf) return TRUE;
 144
 145         gdk_draw_pixbuf(widget->window,
 146                         widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
 147                         phd->pixbuf,
 148                         0, 0,
 149                         0, 0,
 150                         -1, -1,
 151                         GDK_RGB_DITHER_NORMAL, 0, 0);
 152         return TRUE;
 153 }
 154
 155 static void bar_pane_histogram_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
 156 {
 157         PaneHistogramData *phd = data;
 158
 159         phd->histogram_width = allocation->width;
 160         phd->histogram_height = allocation->height;
 161         bar_pane_histogram_update(phd);
 162 }
 163
 164 static void bar_pane_histogram_close(GtkWidget *pane)
 165 {
 166         PaneHistogramData *phd;
 167
 168         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 169         if (!phd) return;
 170
 171         gtk_widget_destroy(phd->widget);
 172 }
 173
 174 static void bar_pane_histogram_destroy(GtkWidget *widget, gpointer data)
 175 {
 176         PaneHistogramData *phd = data;
 177
 178         g_source_remove(phd->idle_id);
 179         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 180
 181         file_data_unref(phd->fd);
 182         histogram_free(phd->histogram);
 183         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 184
 185         g_free(phd);
 186 }
 187
 188 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 189 {
 190         PaneHistogramData *phd;
 191         gint channel;
 192
 193         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 194
 195         phd = submenu_item_get_data(widget);
 196
 197         if (!phd) return;
 198
 199         channel = GPOINTER_TO_INT(data);
 200         if (channel == histogram_get_channel(phd->histogram)) return;
 201
 202         histogram_set_channel(phd->histogram, channel);
 203         bar_pane_histogram_update(phd);
 204 }
 205
 206 static void bar_pane_histogram_popup_logmode_cb(GtkWidget *widget, gpointer data)
 207 {
 208         PaneHistogramData *phd;
 209         gint logmode;
 210
 211         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 212
 213         phd = submenu_item_get_data(widget);
 214
 215         if (!phd) return;
 216
 217         logmode = GPOINTER_TO_INT(data);
 218         if (logmode == histogram_get_mode(phd->histogram)) return;
 219
 220         histogram_set_mode(phd->histogram, logmode);
 221         bar_pane_histogram_update(phd);
 222 }
 223
 224 static GtkWidget *bar_pane_histogram_add_radio(GtkWidget *menu, GtkWidget *parent,
 225                                         const gchar *label,
 226                                         GCallback func, gint value,
 227                                         gboolean show_current, gint current_value)
 228 {
 229         GtkWidget *item;
 230
 231         if (show_current)
 232                 {
 233                 item = menu_item_add_radio(menu, parent,
 234                                            label, (value == current_value),
 235                                            func, GINT_TO_POINTER((gint)value));
 236                 }
 237         else
 238                 {
 239                 item = menu_item_add(menu, label,
 240                                      func, GINT_TO_POINTER((gint)value));
 241                 }
 242
 243         return item;
 244 }
 245
 246 GtkWidget *bar_pane_histogram_add_channels(GtkWidget *menu, GCallback func, gpointer data,
 247                                            gboolean show_current, gint current_value)
 248 {
 249         GtkWidget *submenu;
 250         GtkWidget *parent;
 251
 252         submenu = gtk_menu_new();
 253         g_object_set_data(G_OBJECT(submenu), "submenu_data", data);
 254
 255         parent = bar_pane_histogram_add_radio(submenu, NULL, _("_Red"), func, HCHAN_R, show_current, current_value);
 256         bar_pane_histogram_add_radio(submenu, parent, _("_Green"), func, HCHAN_G, show_current, current_value);
 257         bar_pane_histogram_add_radio(submenu, parent, _("_Blue"),func, HCHAN_B, show_current, current_value);
 258         bar_pane_histogram_add_radio(submenu, parent, _("_RGB"),func, HCHAN_RGB, show_current, current_value);
 259         bar_pane_histogram_add_radio(submenu, parent, _("_Value"),func, HCHAN_MAX, show_current, current_value);
 260
 261         if (menu)
 262                 {
 263                 GtkWidget *item;
 264
 265                 item = menu_item_add(menu, _("Channels"), NULL, NULL);
 266                 gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), submenu);
 267                 return item;
 268                 }
 269
 270         return submenu;
 271 }
 272 GtkWidget *bar_pane_histogram_add_logmode(GtkWidget *menu, GCallback func, gpointer data,
 273                                            gboolean show_current, gint current_value)
 274 {
 275         GtkWidget *submenu;
 276         GtkWidget *parent;
 277
 278         submenu = gtk_menu_new();
 279         g_object_set_data(G_OBJECT(submenu), "submenu_data", data);
 280
 281         parent = bar_pane_histogram_add_radio(submenu, NULL, _("_Linear"), func, 0, show_current, current_value);
 282         bar_pane_histogram_add_radio(submenu, parent, _("Lo_garithmical"), func, 1, show_current, current_value);
 283
 284         if (menu)
 285                 {
 286                 GtkWidget *item;
 287
 288                 item = menu_item_add(menu, _("Mode"), NULL, NULL);
 289                 gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), submenu);
 290                 return item;
 291                 }
 292
 293         return submenu;
 294 }
 295
 296
 297 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 298 {
 299         GtkWidget *menu;
 300         static gboolean show_current = TRUE;
 301
 302         menu = popup_menu_short_lived();
 303         bar_pane_histogram_add_channels(menu, G_CALLBACK(bar_pane_histogram_popup_channels_cb), phd,
 304                                         show_current, histogram_get_channel(phd->histogram));
 305         bar_pane_histogram_add_logmode(menu, G_CALLBACK(bar_pane_histogram_popup_logmode_cb), phd,
 306                                        show_current, histogram_get_mode(phd->histogram));
 307
 308         return menu;
 309 }
 310
 311 static gboolean bar_pane_histogram_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
 312 {
 313         PaneHistogramData *phd = data;
 314
 315         if (bevent->button == MOUSE_BUTTON_RIGHT)
 316                 {
 317                 GtkWidget *menu;
 318
 319                 menu = bar_pane_histogram_menu(phd);
 320                 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
 321                 return TRUE;
 322         }
 323
 324         return FALSE;
 325 }
 326
 327
 328 GtkWidget *bar_pane_histogram_new(const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 329 {
 330         PaneHistogramData *phd;
 331
 332         phd = g_new0(PaneHistogramData, 1);
 333
 334         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 335         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 336         phd->pane.title = gtk_label_new(title);
 337         phd->pane.expanded = expanded;
 338         phd->idle_id = -1;
 339
 340         phd->histogram = histogram_new();
 341
 342         histogram_set_channel(phd->histogram, histogram_channel);
 343         histogram_set_mode(phd->histogram, histogram_mode);
 344
 345         phd->widget = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 346
 347         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 348         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 349                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 350
 351
 352         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 353
 354         phd->drawing_area = gtk_drawing_area_new();
 355         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 356                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 357
 358         g_signal_connect(G_OBJECT(phd->drawing_area), "expose_event",
 359                          G_CALLBACK(bar_pane_histogram_expose_event_cb), phd);
 360
 361         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 362         gtk_widget_show(phd->drawing_area);
 363         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 364
 365         g_signal_connect(G_OBJECT(phd->drawing_area), "button_press_event", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 366
 367         gtk_widget_show(phd->widget);
 368
 369         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 370
 371         return phd->widget;
 372 }
 373
 374 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 375 {
 376         gchar *title = g_strdup(_("NoName"));
 377         gboolean expanded = TRUE;
 378         gint height = 80;
 379         gint histogram_channel = HCHAN_RGB;
 380         gint histogram_mode = 0;
 381
 382         while (*attribute_names)
 383                 {
 384                 const gchar *option = *attribute_names++;
 385                 const gchar *value = *attribute_values++;
 386
 387                 if (READ_CHAR_FULL("pane.title", title)) continue;
 388                 if (READ_BOOL_FULL("pane.expanded", expanded)) continue;
 389                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 390                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 391
 392
 393                 DEBUG_1("unknown attribute %s = %s", option, value);
 394                 }
 395
 396         return bar_pane_histogram_new(title, height, expanded, histogram_channel, histogram_mode);
 397 }
 398
 399
 400 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */