src/dnd.c

   1 /*
   2  * Geeqie
   3  * (C) 2004 John Ellis
   4  * Copyright (C) 2008 The Geeqie Team
   5  *
   6  * Author: John Ellis
   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 "dnd.h"
  16
  17 #include "collect.h"
  18 #include "image.h"
  19 #include "ui_bookmark.h"
  20 #include "ui_fileops.h"
  21
  22
  23 GtkTargetEntry dnd_file_drag_types[] = {
  24         { "text/uri-list", 0, TARGET_URI_LIST },
  25         { "text/plain", 0, TARGET_TEXT_PLAIN }
  26 };
  27 gint dnd_file_drag_types_count = 2;
  28
  29 GtkTargetEntry dnd_file_drop_types[] = {
  30         { TARGET_APP_COLLECTION_MEMBER_STRING, 0, TARGET_APP_COLLECTION_MEMBER },
  31         { "text/uri-list", 0, TARGET_URI_LIST }
  32 };
  33 gint dnd_file_drop_types_count = 2;
  34
  35
  36 #define DND_ICON_SIZE (options->dnd_icon_size)
  37
  38
  39 static void pixbuf_draw_border(GdkPixbuf *pixbuf, gint w, gint h)
  40 {
  41         gint alpha;
  42         gint rs;
  43         guchar *pix;
  44         guchar *p;
  45         gint i;
  46
  47         alpha = gdk_pixbuf_get_has_alpha(pixbuf);
  48         rs = gdk_pixbuf_get_rowstride(pixbuf);
  49         pix = gdk_pixbuf_get_pixels(pixbuf);
  50
  51         p = pix;
  52         for (i = 0; i < w; i++)
  53                 {
  54                 *p = 0; p++; *p = 0; p++; *p = 0; p++;
  55                 if (alpha) { *p= 255; p++; }
  56                 }
  57         for (i = 1; i < h - 1; i++)
  58                 {
  59                 p = pix + rs * i;
  60                 *p = 0; p++; *p = 0; p++; *p = 0; p++;
  61                 if (alpha) *p= 255;
  62
  63                 p = pix + rs * i + (w - 1) * ((alpha == TRUE) ? 4 : 3);
  64                 *p = 0; p++; *p = 0; p++; *p = 0; p++;
  65                 if (alpha) *p= 255;
  66                 }
  67         p = pix + rs * (h - 1);
  68         for (i = 0; i < w; i++)
  69                 {
  70                 *p = 0; p++; *p = 0; p++; *p = 0; p++;
  71                 if (alpha) { *p= 255; p++; }
  72                 }
  73 }
  74
  75 static void pixbuf_draw_rect(GdkPixbuf *pixbuf, gint x, gint y, gint w, gint h, guint8 val)
  76 {
  77         gint alpha;
  78         gint rs;
  79         guchar *pix;
  80         guchar *p;
  81         gint i, j;
  82
  83         alpha = gdk_pixbuf_get_has_alpha(pixbuf);
  84         rs = gdk_pixbuf_get_rowstride(pixbuf);
  85         pix = gdk_pixbuf_get_pixels(pixbuf);
  86
  87         for (j = 0; j < h; j++)
  88                 {
  89                 p = pix + (rs * (y + j)) + (x * ((alpha) ? 4 : 3));
  90                 for (i = 0; i < w; i++)
  91                         {
  92                         *p = (*p * (256-val)) >> 8; p++;
  93                         *p = (*p * (256-val)) >> 8; p++;
  94                         *p = (*p * (256-val)) >> 8; p++;
  95                         if (alpha) { *p = 255; p++; }
  96                         }
  97                 }
  98 }
  99
 100 void dnd_set_drag_icon(GtkWidget *widget, GdkDragContext *context, GdkPixbuf *pixbuf, gint items)
 101 {
 102                 GdkPixmap *pixmap;
 103                 GdkBitmap *mask;
 104                 GdkPixbuf *dest;
 105                 gint w, h;
 106                 gint sw, sh;
 107                 PangoLayout *layout = NULL;
 108                 gint x, y;
 109
 110                 x = y = 0;
 111
 112                 sw = gdk_pixbuf_get_width(pixbuf);
 113                 sh = gdk_pixbuf_get_height(pixbuf);
 114
 115                 if (sw <= DND_ICON_SIZE && sh <= DND_ICON_SIZE)
 116                         {
 117                         w = sw;
 118                         h = sh;
 119                         }
 120                 else if (sw < sh)
 121                         {
 122                         w = sw * DND_ICON_SIZE / sh;
 123                         h = DND_ICON_SIZE;
 124                         }
 125                 else
 126                         {
 127                         w = DND_ICON_SIZE;
 128                         h = sh * DND_ICON_SIZE / sw;
 129                         }
 130
 131                 dest = gdk_pixbuf_scale_simple(pixbuf, w, h, GDK_INTERP_BILINEAR);
 132                 pixbuf_draw_border(dest, w, h);
 133
 134                 if (items > 1)
 135                         {
 136                         gchar *buf;
 137                         gint lw,lh;
 138
 139                         layout = gtk_widget_create_pango_layout(widget, NULL);
 140                         buf = g_strdup_printf("<small> %d </small>", items);
 141                         pango_layout_set_markup(layout, buf, -1);
 142                         g_free(buf);
 143
 144                         pango_layout_get_pixel_size(layout, &lw, &lh);
 145
 146                         x = MAX(0, w - lw);
 147                         y = MAX(0, h - lh);
 148                         lw = CLAMP(lw, 0, w - x - 1);
 149                         lh = CLAMP(lh, 0, h - y - 1);
 150
 151                         pixbuf_draw_rect(dest, x, y, lw, lh, 128);
 152                         }
 153
 154                 gdk_pixbuf_render_pixmap_and_mask(dest, &pixmap, &mask, 128);
 155                 g_object_unref(dest);
 156
 157                 if (layout)
 158                         {
 159                         gdk_draw_layout(pixmap, widget->style->black_gc, x+1, y+1, layout);
 160                         gdk_draw_layout(pixmap, widget->style->white_gc, x, y, layout);
 161
 162                         g_object_unref(G_OBJECT(layout));
 163                         }
 164
 165                 gtk_drag_set_icon_pixmap(context, gtk_widget_get_colormap(widget), pixmap, mask, -8, -6);
 166
 167                 g_object_unref(pixmap);
 168                 if (mask) g_object_unref(mask);
 169 }