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)
  87                 {
  88                 histmap_start_idle(phd->fd);
  89                 return FALSE;
  90                 }
  91
  92         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
  93         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
  94         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
  95
  96         return FALSE;
  97 }
  98
  99
 100 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
 101 {
 102         PaneHistogramData *phd;
 103
 104         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 105         if (!phd) return;
 106
 107         file_data_unref(phd->fd);
 108         phd->fd = file_data_ref(fd);
 109
 110         bar_pane_histogram_update(phd);
 111 }
 112
 113 static void bar_pane_histogram_write_config(GtkWidget *pane, GString *outstr, gint indent)
 114 {
 115         PaneHistogramData *phd;
 116
 117         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 118         if (!phd) return;
 119
 120         WRITE_STRING("<pane_histogram\n");
 121         indent++;
 122         write_char_option(outstr, indent, "pane.title", gtk_label_get_text(GTK_LABEL(phd->pane.title)));
 123         WRITE_BOOL(*phd, pane.expanded);
 124         WRITE_INT(*phd->histogram, histogram_channel);
 125         WRITE_INT(*phd->histogram, histogram_mode);
 126         indent--;
 127         WRITE_STRING("/>\n");
 128 }
 129
 130 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
 131 {
 132         PaneHistogramData *phd = data;
 133         if ((type & (NOTIFY_REREAD | NOTIFY_CHANGE | NOTIFY_HISTMAP | NOTIFY_PIXBUF)) && fd == phd->fd) bar_pane_histogram_update(phd);
 134 }
 135
 136 static gboolean bar_pane_histogram_expose_event_cb(GtkWidget *widget, GdkEventExpose *event, gpointer data)
 137 {
 138         PaneHistogramData *phd = data;
 139         if (!phd) return TRUE;
 140
 141         if (phd->need_update)
 142                 {
 143                 bar_pane_histogram_update(phd);
 144                 }
 145
 146         if (!phd->pixbuf) return TRUE;
 147
 148         gdk_draw_pixbuf(widget->window,
 149                         widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
 150                         phd->pixbuf,
 151                         0, 0,
 152                         0, 0,
 153                         -1, -1,
 154                         GDK_RGB_DITHER_NORMAL, 0, 0);
 155         return TRUE;
 156 }
 157
 158 static void bar_pane_histogram_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
 159 {
 160         PaneHistogramData *phd = data;
 161
 162         phd->histogram_width = allocation->width;
 163         phd->histogram_height = allocation->height;
 164         bar_pane_histogram_update(phd);
 165 }
 166
 167 static void bar_pane_histogram_close(GtkWidget *pane)
 168 {
 169         PaneHistogramData *phd;
 170
 171         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 172         if (!phd) return;
 173
 174         gtk_widget_destroy(phd->widget);
 175 }
 176
 177 static void bar_pane_histogram_destroy(GtkWidget *widget, gpointer data)
 178 {
 179         PaneHistogramData *phd = data;
 180
 181         g_source_remove(phd->idle_id);
 182         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 183
 184         file_data_unref(phd->fd);
 185         histogram_free(phd->histogram);
 186         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 187
 188         g_free(phd);
 189 }
 190
 191 static void bar_pane_histogram_popup_channels_cb(GtkWidget *widget, gpointer data)
 192 {
 193         PaneHistogramData *phd;
 194         gint channel;
 195
 196         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 197
 198         phd = submenu_item_get_data(widget);
 199
 200         if (!phd) return;
 201
 202         channel = GPOINTER_TO_INT(data);
 203         if (channel == histogram_get_channel(phd->histogram)) return;
 204
 205         histogram_set_channel(phd->histogram, channel);
 206         bar_pane_histogram_update(phd);
 207 }
 208
 209 static void bar_pane_histogram_popup_logmode_cb(GtkWidget *widget, gpointer data)
 210 {
 211         PaneHistogramData *phd;
 212         gint logmode;
 213
 214         if (!gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(widget))) return;
 215
 216         phd = submenu_item_get_data(widget);
 217
 218         if (!phd) return;
 219
 220         logmode = GPOINTER_TO_INT(data);
 221         if (logmode == histogram_get_mode(phd->histogram)) return;
 222
 223         histogram_set_mode(phd->histogram, logmode);
 224         bar_pane_histogram_update(phd);
 225 }
 226
 227 static GtkWidget *bar_pane_histogram_add_radio(GtkWidget *menu, GtkWidget *parent,
 228                                         const gchar *label,
 229                                         GCallback func, gint value,
 230                                         gboolean show_current, gint current_value)
 231 {
 232         GtkWidget *item;
 233
 234         if (show_current)
 235                 {
 236                 item = menu_item_add_radio(menu, parent,
 237                                            label, (value == current_value),
 238                                            func, GINT_TO_POINTER((gint)value));
 239                 }
 240         else
 241                 {
 242                 item = menu_item_add(menu, label,
 243                                      func, GINT_TO_POINTER((gint)value));
 244                 }
 245
 246         return item;
 247 }
 248
 249 GtkWidget *bar_pane_histogram_add_channels(GtkWidget *menu, GCallback func, gpointer data,
 250                                            gboolean show_current, gint current_value)
 251 {
 252         GtkWidget *submenu;
 253         GtkWidget *parent;
 254
 255         submenu = gtk_menu_new();
 256         g_object_set_data(G_OBJECT(submenu), "submenu_data", data);
 257
 258         parent = bar_pane_histogram_add_radio(submenu, NULL, _("_Red"), func, HCHAN_R, show_current, current_value);
 259         bar_pane_histogram_add_radio(submenu, parent, _("_Green"), func, HCHAN_G, show_current, current_value);
 260         bar_pane_histogram_add_radio(submenu, parent, _("_Blue"),func, HCHAN_B, show_current, current_value);
 261         bar_pane_histogram_add_radio(submenu, parent, _("_RGB"),func, HCHAN_RGB, show_current, current_value);
 262         bar_pane_histogram_add_radio(submenu, parent, _("_Value"),func, HCHAN_MAX, show_current, current_value);
 263
 264         if (menu)
 265                 {
 266                 GtkWidget *item;
 267
 268                 item = menu_item_add(menu, _("Channels"), NULL, NULL);
 269                 gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), submenu);
 270                 return item;
 271                 }
 272
 273         return submenu;
 274 }
 275 GtkWidget *bar_pane_histogram_add_logmode(GtkWidget *menu, GCallback func, gpointer data,
 276                                            gboolean show_current, gint current_value)
 277 {
 278         GtkWidget *submenu;
 279         GtkWidget *parent;
 280
 281         submenu = gtk_menu_new();
 282         g_object_set_data(G_OBJECT(submenu), "submenu_data", data);
 283
 284         parent = bar_pane_histogram_add_radio(submenu, NULL, _("_Linear"), func, 0, show_current, current_value);
 285         bar_pane_histogram_add_radio(submenu, parent, _("Lo_garithmical"), func, 1, show_current, current_value);
 286
 287         if (menu)
 288                 {
 289                 GtkWidget *item;
 290
 291                 item = menu_item_add(menu, _("Mode"), NULL, NULL);
 292                 gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), submenu);
 293                 return item;
 294                 }
 295
 296         return submenu;
 297 }
 298
 299
 300 static GtkWidget *bar_pane_histogram_menu(PaneHistogramData *phd)
 301 {
 302         GtkWidget *menu;
 303         static gboolean show_current = TRUE;
 304
 305         menu = popup_menu_short_lived();
 306         bar_pane_histogram_add_channels(menu, G_CALLBACK(bar_pane_histogram_popup_channels_cb), phd,
 307                                         show_current, histogram_get_channel(phd->histogram));
 308         bar_pane_histogram_add_logmode(menu, G_CALLBACK(bar_pane_histogram_popup_logmode_cb), phd,
 309                                        show_current, histogram_get_mode(phd->histogram));
 310
 311         return menu;
 312 }
 313
 314 static gboolean bar_pane_histogram_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
 315 {
 316         PaneHistogramData *phd = data;
 317
 318         if (bevent->button == MOUSE_BUTTON_RIGHT)
 319                 {
 320                 GtkWidget *menu;
 321
 322                 menu = bar_pane_histogram_menu(phd);
 323                 gtk_menu_popup(GTK_MENU(menu), NULL, NULL, NULL, NULL, bevent->button, bevent->time);
 324                 return TRUE;
 325         }
 326
 327         return FALSE;
 328 }
 329
 330
 331 GtkWidget *bar_pane_histogram_new(const gchar *title, gint height, gboolean expanded, gint histogram_channel, gint histogram_mode)
 332 {
 333         PaneHistogramData *phd;
 334
 335         phd = g_new0(PaneHistogramData, 1);
 336
 337         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 338         phd->pane.pane_write_config = bar_pane_histogram_write_config;
 339         phd->pane.title = bar_pane_expander_title(title);
 340
 341         phd->pane.expanded = expanded;
 342         phd->idle_id = -1;
 343
 344         phd->histogram = histogram_new();
 345
 346         histogram_set_channel(phd->histogram, histogram_channel);
 347         histogram_set_mode(phd->histogram, histogram_mode);
 348
 349         phd->widget = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 350
 351         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 352         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 353                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 354
 355
 356         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 357
 358         phd->drawing_area = gtk_drawing_area_new();
 359         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 360                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 361
 362         g_signal_connect(G_OBJECT(phd->drawing_area), "expose_event",
 363                          G_CALLBACK(bar_pane_histogram_expose_event_cb), phd);
 364
 365         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 366         gtk_widget_show(phd->drawing_area);
 367         gtk_widget_add_events(phd->drawing_area, GDK_BUTTON_PRESS_MASK);
 368
 369         g_signal_connect(G_OBJECT(phd->drawing_area), "button_press_event", G_CALLBACK(bar_pane_histogram_press_cb), phd);
 370
 371         gtk_widget_show(phd->widget);
 372
 373         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 374
 375         return phd->widget;
 376 }
 377
 378 GtkWidget *bar_pane_histogram_new_from_config(const gchar **attribute_names, const gchar **attribute_values)
 379 {
 380         gchar *title = g_strdup(_("NoName"));
 381         gboolean expanded = TRUE;
 382         gint height = 80;
 383         gint histogram_channel = HCHAN_RGB;
 384         gint histogram_mode = 0;
 385
 386         while (*attribute_names)
 387                 {
 388                 const gchar *option = *attribute_names++;
 389                 const gchar *value = *attribute_values++;
 390
 391                 if (READ_CHAR_FULL("pane.title", title)) continue;
 392                 if (READ_BOOL_FULL("pane.expanded", expanded)) continue;
 393                 if (READ_INT_FULL("histogram_channel", histogram_channel)) continue;
 394                 if (READ_INT_FULL("histogram_mode", histogram_mode)) continue;
 395
 396                 DEBUG_1("unknown attribute %s = %s", option, value);
 397                 }
 398
 399         return bar_pane_histogram_new(title, height, expanded, histogram_channel, histogram_mode);
 400 }
 401
 402 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */