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_comment.h"
  16
  17 #include "bar.h"
  18 #include "metadata.h"
  19 #include "filedata.h"
  20 #include "ui_menu.h"
  21 #include "ui_misc.h"
  22 #include "histogram.h"
  23
  24 /*
  25  *-------------------------------------------------------------------
  26  * keyword / comment utils
  27  *-------------------------------------------------------------------
  28  */
  29
  30
  31
  32 typedef struct _PaneHistogramData PaneHistogramData;
  33 struct _PaneHistogramData
  34 {
  35         PaneData pane;
  36         GtkWidget *widget;
  37         GtkWidget *drawing_area;
  38         Histogram *histogram;
  39         gint histogram_width;
  40         gint histogram_height;
  41         GdkPixbuf *pixbuf;
  42         FileData *fd;
  43 };
  44
  45
  46 static void bar_pane_histogram_update(PaneHistogramData *phd)
  47 {
  48         const HistMap *histmap;
  49         if (phd->pixbuf) g_object_unref(phd->pixbuf);
  50         phd->pixbuf = NULL;
  51
  52         if (!phd->histogram_width || !phd->histogram_height || !phd->fd) return;
  53
  54         gtk_widget_queue_draw_area(GTK_WIDGET(phd->drawing_area), 0, 0, phd->histogram_width, phd->histogram_height);
  55
  56         histmap = histmap_get(phd->fd);
  57
  58         if (!histmap) return;
  59
  60         phd->pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, FALSE, 8, phd->histogram_width, phd->histogram_height);
  61         gdk_pixbuf_fill(phd->pixbuf, 0xffffffff);
  62         histogram_draw(phd->histogram, histmap, phd->pixbuf, 0, 0, phd->histogram_width, phd->histogram_height);
  63 }
  64
  65
  66 static void bar_pane_histogram_set_fd(GtkWidget *pane, FileData *fd)
  67 {
  68         PaneHistogramData *phd;
  69
  70         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
  71         if (!phd) return;
  72
  73         file_data_unref(phd->fd);
  74         phd->fd = file_data_ref(fd);
  75
  76         bar_pane_histogram_update(phd);
  77 }
  78
  79 static void bar_pane_histogram_notify_cb(FileData *fd, NotifyType type, gpointer data)
  80 {
  81         PaneHistogramData *phd = data;
  82         if (fd == phd->fd) bar_pane_histogram_update(phd);
  83 }
  84
  85 static gboolean bar_pane_histogram_expose_event_cb (GtkWidget *widget, GdkEventExpose *event, gpointer data)
  86 {
  87         PaneHistogramData *phd = data;
  88         if (!phd || !phd->pixbuf) return TRUE;
  89
  90         gdk_draw_pixbuf(widget->window,
  91                         widget->style->fg_gc[GTK_WIDGET_STATE (widget)],
  92                         phd->pixbuf,
  93                         0, 0,
  94                         0, 0,
  95                         -1, -1,
  96                         GDK_RGB_DITHER_NORMAL, 0, 0);
  97         return TRUE;
  98 }
  99
 100 static void bar_pane_histogram_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data)
 101 {
 102         PaneHistogramData *phd = data;
 103
 104         phd->histogram_width = allocation->width;
 105         phd->histogram_height = allocation->height;
 106         bar_pane_histogram_update(phd);
 107 }
 108
 109 static void bar_pane_histogram_close(GtkWidget *pane)
 110 {
 111         PaneHistogramData *phd;
 112
 113         phd = g_object_get_data(G_OBJECT(pane), "pane_data");
 114         if (!phd) return;
 115
 116         gtk_widget_destroy(phd->widget);
 117 }
 118
 119 static void bar_pane_histogram_destroy(GtkWidget *widget, gpointer data)
 120 {
 121         PaneHistogramData *phd = data;
 122
 123         file_data_unregister_notify_func(bar_pane_histogram_notify_cb, phd);
 124
 125         file_data_unref(phd->fd);
 126         g_free(phd->pane.title);
 127         histogram_free(phd->histogram);
 128         if (phd->pixbuf) g_object_unref(phd->pixbuf);
 129
 130         g_free(phd);
 131 }
 132
 133
 134 GtkWidget *bar_pane_histogram_new(const gchar *title, gint height)
 135 {
 136         PaneHistogramData *phd;
 137
 138         phd = g_new0(PaneHistogramData, 1);
 139
 140         phd->pane.pane_set_fd = bar_pane_histogram_set_fd;
 141         phd->pane.title = g_strdup(title);
 142
 143         phd->histogram = histogram_new();
 144
 145         phd->widget = gtk_vbox_new(FALSE, PREF_PAD_GAP);
 146
 147         g_object_set_data(G_OBJECT(phd->widget), "pane_data", phd);
 148         g_signal_connect(G_OBJECT(phd->widget), "destroy",
 149                          G_CALLBACK(bar_pane_histogram_destroy), phd);
 150
 151
 152         gtk_widget_set_size_request(GTK_WIDGET(phd->widget), -1, height);
 153
 154         phd->drawing_area = gtk_drawing_area_new();
 155         g_signal_connect_after(G_OBJECT(phd->drawing_area), "size_allocate",
 156                                G_CALLBACK(bar_pane_histogram_size_cb), phd);
 157
 158         g_signal_connect(G_OBJECT(phd->drawing_area), "expose_event",
 159                          G_CALLBACK(bar_pane_histogram_expose_event_cb), phd);
 160
 161         gtk_box_pack_start(GTK_BOX(phd->widget), phd->drawing_area, TRUE, TRUE, 0);
 162         gtk_widget_show(phd->drawing_area);
 163
 164
 165         gtk_widget_show(phd->widget);
 166
 167         file_data_register_notify_func(bar_pane_histogram_notify_cb, phd, NOTIFY_PRIORITY_LOW);
 168
 169         return phd->widget;
 170 }
 171
 172 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */