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gtk/tests/testdnd.c
Javier Jardón 9d0febc9a6 Change FSF Address
2012-02-27 17:06:11 +00:00

681 lines
24 KiB
C
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/* testdnd.c
* Copyright (C) 1998 Red Hat, Inc.
* Author: Owen Taylor
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtk/gtk.h"
/* Target side drag signals */
/* XPM */
static const char * drag_icon_xpm[] = {
"36 48 9 1",
" c None",
". c #020204",
"+ c #8F8F90",
"@ c #D3D3D2",
"# c #AEAEAC",
"$ c #ECECEC",
"% c #A2A2A4",
"& c #FEFEFC",
"* c #BEBEBC",
" .....................",
" ..&&&&&&&&&&&&&&&&&&&.",
" ...&&&&&&&&&&&&&&&&&&&.",
" ..&.&&&&&&&&&&&&&&&&&&&.",
" ..&&.&&&&&&&&&&&&&&&&&&&.",
" ..&&&.&&&&&&&&&&&&&&&&&&&.",
" ..&&&&.&&&&&&&&&&&&&&&&&&&.",
" ..&&&&&.&&&@&&&&&&&&&&&&&&&.",
" ..&&&&&&.*$%$+$&&&&&&&&&&&&&.",
" ..&&&&&&&.%$%$+&&&&&&&&&&&&&&.",
" ..&&&&&&&&.#&#@$&&&&&&&&&&&&&&.",
" ..&&&&&&&&&.#$**#$&&&&&&&&&&&&&.",
" ..&&&&&&&&&&.&@%&%$&&&&&&&&&&&&&.",
" ..&&&&&&&&&&&.&&&&&&&&&&&&&&&&&&&.",
" ..&&&&&&&&&&&&.&&&&&&&&&&&&&&&&&&&.",
"................&$@&&&@&&&&&&&&&&&&.",
".&&&&&&&+&&#@%#+@#@*$%$+$&&&&&&&&&&.",
".&&&&&&&+&&#@#@&&@*%$%$+&&&&&&&&&&&.",
".&&&&&&&+&$%&#@&#@@#&#@$&&&&&&&&&&&.",
".&&&&&&@#@@$&*@&@#@#$**#$&&&&&&&&&&.",
".&&&&&&&&&&&&&&&&&&&@%&%$&&&&&&&&&&.",
".&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&.",
".&&&&&&&&$#@@$&&&&&&&&&&&&&&&&&&&&&.",
".&&&&&&&&&+&$+&$&@&$@&&$@&&&&&&&&&&.",
".&&&&&&&&&+&&#@%#+@#@*$%&+$&&&&&&&&.",
".&&&&&&&&&+&&#@#@&&@*%$%$+&&&&&&&&&.",
".&&&&&&&&&+&$%&#@&#@@#&#@$&&&&&&&&&.",
".&&&&&&&&@#@@$&*@&@#@#$#*#$&&&&&&&&.",
".&&&&&&&&&&&&&&&&&&&&&$%&%$&&&&&&&&.",
".&&&&&&&&&&$#@@$&&&&&&&&&&&&&&&&&&&.",
".&&&&&&&&&&&+&$%&$$@&$@&&$@&&&&&&&&.",
".&&&&&&&&&&&+&&#@%#+@#@*$%$+$&&&&&&.",
".&&&&&&&&&&&+&&#@#@&&@*#$%$+&&&&&&&.",
".&&&&&&&&&&&+&$+&*@&#@@#&#@$&&&&&&&.",
".&&&&&&&&&&$%@@&&*@&@#@#$#*#&&&&&&&.",
".&&&&&&&&&&&&&&&&&&&&&&&$%&%$&&&&&&.",
".&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&.",
".&&&&&&&&&&&&&&$#@@$&&&&&&&&&&&&&&&.",
".&&&&&&&&&&&&&&&+&$%&$$@&$@&&$@&&&&.",
".&&&&&&&&&&&&&&&+&&#@%#+@#@*$%$+$&&.",
".&&&&&&&&&&&&&&&+&&#@#@&&@*#$%$+&&&.",
".&&&&&&&&&&&&&&&+&$+&*@&#@@#&#@$&&&.",
".&&&&&&&&&&&&&&$%@@&&*@&@#@#$#*#&&&.",
".&&&&&&&&&&&&&&&&&&&&&&&&&&&$%&%$&&.",
".&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&.",
".&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&.",
".&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&.",
"...................................."};
/* XPM */
static const char * trashcan_closed_xpm[] = {
"64 80 17 1",
" c None",
". c #030304",
"+ c #5A5A5C",
"@ c #323231",
"# c #888888",
"$ c #1E1E1F",
"% c #767677",
"& c #494949",
"* c #9E9E9C",
"= c #111111",
"- c #3C3C3D",
"; c #6B6B6B",
"> c #949494",
", c #282828",
"' c #808080",
") c #545454",
"! c #AEAEAC",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ==......=$$...=== ",
" ..$------)+++++++++++++@$$... ",
" ..=@@-------&+++++++++++++++++++-.... ",
" =.$$@@@-&&)++++)-,$$$$=@@&+++++++++++++,..$ ",
" .$$$$@@&+++++++&$$$@@@@-&,$,-++++++++++;;;&.. ",
" $$$$,@--&++++++&$$)++++++++-,$&++++++;%%'%%;;$@ ",
" .-@@-@-&++++++++-@++++++++++++,-++++++;''%;;;%*-$ ",
" +------++++++++++++++++++++++++++++++;;%%%;;##*!. ",
" =+----+++++++++++++++++++++++;;;;;;;;;;;;%'>>). ",
" .=)&+++++++++++++++++;;;;;;;;;;;;;;%''>>#>#@. ",
" =..=&++++++++++++;;;;;;;;;;;;;%###>>###+%== ",
" .&....=-+++++%;;####''''''''''##'%%%)..#. ",
" .+-++@....=,+%#####'%%%%%%%%%;@$-@-@*++!. ",
" .+-++-+++-&-@$$=$=......$,,,@;&)+!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" =+-++-+++-+++++++++!++++!++++!+++!++!+++= ",
" $.++-+++-+++++++++!++++!++++!+++!++!+.$ ",
" =.++++++++++++++!++++!++++!+++!++.= ",
" $..+++++++++++++++!++++++...$ ",
" $$=.............=$$ ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" "};
/* XPM */
static const char * trashcan_open_xpm[] = {
"64 80 17 1",
" c None",
". c #030304",
"+ c #5A5A5C",
"@ c #323231",
"# c #888888",
"$ c #1E1E1F",
"% c #767677",
"& c #494949",
"* c #9E9E9C",
"= c #111111",
"- c #3C3C3D",
"; c #6B6B6B",
"> c #949494",
", c #282828",
"' c #808080",
") c #545454",
"! c #AEAEAC",
" ",
" ",
" ",
" ",
" ",
" ",
" .=.==.,@ ",
" ==.,@-&&&)-= ",
" .$@,&++;;;%>*- ",
" $,-+)+++%%;;'#+. ",
" =---+++++;%%%;%##@. ",
" @)++++++++;%%%%'#%$ ",
" $&++++++++++;%%;%##@= ",
" ,-++++)+++++++;;;'#%) ",
" @+++&&--&)++++;;%'#'-. ",
" ,&++-@@,,,,-)++;;;'>'+, ",
" =-++&@$@&&&&-&+;;;%##%+@ ",
" =,)+)-,@@&+++++;;;;%##%&@ ",
" @--&&,,@&)++++++;;;;'#)@ ",
" ---&)-,@)+++++++;;;%''+, ",
" $--&)+&$-+++++++;;;%%'';- ",
" .,-&+++-$&++++++;;;%''%&= ",
" $,-&)++)-@++++++;;%''%), ",
" =,@&)++++&&+++++;%'''+$@&++++++ ",
" .$@-++++++++++++;'#';,........=$@&++++ ",
" =$@@&)+++++++++++'##-.................=&++ ",
" .$$@-&)+++++++++;%#+$.....................=)+ ",
" $$,@-)+++++++++;%;@=........................,+ ",
" .$$@@-++++++++)-)@=............................ ",
" $,@---)++++&)@===............................,. ",
" $-@---&)))-$$=..............................=)!. ",
" --&-&&,,$=,==...........................=&+++!. ",
" =,=$..=$+)+++++&@$=.............=$@&+++++!++!. ",
" .)-++-+++++++++++++++++++++++++++!++!++!. ",
" .+-++-+++++++++++++++++++++++!+++!++!++!. ",
" .+-++-+++-+++++++++!+++!!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" .+-++-+++-+++++++++!++++!++++!+++!++!++!. ",
" =+-++-+++-+++++++++!++++!++++!+++!++!+++= ",
" $.++-+++-+++++++++!++++!++++!+++!++!+.$ ",
" =.++++++++++++++!++++!++++!+++!++.= ",
" $..+++++++++++++++!++++++...$ ",
" $$==...........==$$ ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" ",
" "};
GdkPixbuf *trashcan_open;
GdkPixbuf *trashcan_closed;
gboolean have_drag;
enum {
TARGET_STRING,
TARGET_ROOTWIN
};
static GtkTargetEntry target_table[] = {
{ "STRING", 0, TARGET_STRING },
{ "text/plain", 0, TARGET_STRING },
{ "application/x-rootwindow-drop", 0, TARGET_ROOTWIN }
};
static guint n_targets = sizeof(target_table) / sizeof(target_table[0]);
void
target_drag_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
g_print("leave\n");
have_drag = FALSE;
gtk_image_set_from_pixbuf (GTK_IMAGE (widget), trashcan_closed);
}
gboolean
target_drag_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
GtkWidget *source_widget;
GList *tmp_list;
if (!have_drag)
{
have_drag = TRUE;
gtk_image_set_from_pixbuf (GTK_IMAGE (widget), trashcan_open);
}
source_widget = gtk_drag_get_source_widget (context);
g_print ("motion, source %s\n", source_widget ?
G_OBJECT_TYPE_NAME (source_widget) :
"NULL");
tmp_list = gdk_drag_context_list_targets (context);
while (tmp_list)
{
char *name = gdk_atom_name (GDK_POINTER_TO_ATOM (tmp_list->data));
g_print ("%s\n", name);
g_free (name);
tmp_list = tmp_list->next;
}
gdk_drag_status (context, gdk_drag_context_get_suggested_action (context), time);
return TRUE;
}
gboolean
target_drag_drop (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
g_print("drop\n");
have_drag = FALSE;
gtk_image_set_from_pixbuf (GTK_IMAGE (widget), trashcan_closed);
if (gdk_drag_context_list_targets (context))
{
gtk_drag_get_data (widget, context,
GDK_POINTER_TO_ATOM (gdk_drag_context_list_targets (context)->data),
time);
return TRUE;
}
return FALSE;
}
void
target_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint time)
{
if (gtk_selection_data_get_length (selection_data) >= 0 &&
gtk_selection_data_get_format (selection_data) == 8)
{
g_print ("Received \"%s\" in trashcan\n", (gchar *) gtk_selection_data_get_data (selection_data));
gtk_drag_finish (context, TRUE, FALSE, time);
return;
}
gtk_drag_finish (context, FALSE, FALSE, time);
}
void
label_drag_data_received (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
GtkSelectionData *selection_data,
guint info,
guint time)
{
if (gtk_selection_data_get_length (selection_data) >= 0 &&
gtk_selection_data_get_format (selection_data) == 8)
{
g_print ("Received \"%s\" in label\n", (gchar *) gtk_selection_data_get_data (selection_data));
gtk_drag_finish (context, TRUE, FALSE, time);
return;
}
gtk_drag_finish (context, FALSE, FALSE, time);
}
void
source_drag_data_get (GtkWidget *widget,
GdkDragContext *context,
GtkSelectionData *selection_data,
guint info,
guint time,
gpointer data)
{
if (info == TARGET_ROOTWIN)
g_print ("I was dropped on the rootwin\n");
else
gtk_selection_data_set (selection_data,
gtk_selection_data_get_target (selection_data),
8, (guchar *) "I'm Data!", 9);
}
/* The following is a rather elaborate example demonstrating/testing
* changing of the window hierarchy during a drag - in this case,
* via a "spring-loaded" popup window.
*/
static GtkWidget *popup_window = NULL;
static gboolean popped_up = FALSE;
static gboolean in_popup = FALSE;
static guint popdown_timer = 0;
static guint popup_timer = 0;
gint
popdown_cb (gpointer data)
{
popdown_timer = 0;
gtk_widget_hide (popup_window);
popped_up = FALSE;
return FALSE;
}
gboolean
popup_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
if (!in_popup)
{
in_popup = TRUE;
if (popdown_timer)
{
g_print ("removed popdown\n");
g_source_remove (popdown_timer);
popdown_timer = 0;
}
}
return TRUE;
}
void
popup_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
if (in_popup)
{
in_popup = FALSE;
if (!popdown_timer)
{
g_print ("added popdown\n");
popdown_timer = gdk_threads_add_timeout (500, popdown_cb, NULL);
}
}
}
gboolean
popup_cb (gpointer data)
{
if (!popped_up)
{
if (!popup_window)
{
GtkWidget *button;
GtkWidget *grid;
int i, j;
popup_window = gtk_window_new (GTK_WINDOW_POPUP);
gtk_window_set_position (GTK_WINDOW (popup_window), GTK_WIN_POS_MOUSE);
grid = gtk_grid_new ();
for (i=0; i<3; i++)
for (j=0; j<3; j++)
{
char buffer[128];
g_snprintf(buffer, sizeof(buffer), "%d,%d", i, j);
button = gtk_button_new_with_label (buffer);
gtk_widget_set_hexpand (button, TRUE);
gtk_widget_set_vexpand (button, TRUE);
gtk_grid_attach (GTK_GRID (grid), button, i, j, 1, 1);
gtk_drag_dest_set (button,
GTK_DEST_DEFAULT_ALL,
target_table, n_targets - 1, /* no rootwin */
GDK_ACTION_COPY | GDK_ACTION_MOVE);
g_signal_connect (button, "drag_motion",
G_CALLBACK (popup_motion), NULL);
g_signal_connect (button, "drag_leave",
G_CALLBACK (popup_leave), NULL);
}
gtk_widget_show_all (grid);
gtk_container_add (GTK_CONTAINER (popup_window), grid);
}
gtk_widget_show (popup_window);
popped_up = TRUE;
}
popdown_timer = gdk_threads_add_timeout (500, popdown_cb, NULL);
g_print ("added popdown\n");
popup_timer = FALSE;
return FALSE;
}
gboolean
popsite_motion (GtkWidget *widget,
GdkDragContext *context,
gint x,
gint y,
guint time)
{
if (!popup_timer)
popup_timer = gdk_threads_add_timeout (500, popup_cb, NULL);
return TRUE;
}
void
popsite_leave (GtkWidget *widget,
GdkDragContext *context,
guint time)
{
if (popup_timer)
{
g_source_remove (popup_timer);
popup_timer = 0;
}
}
void
source_drag_data_delete (GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
g_print ("Delete the data!\n");
}
void
test_init (void)
{
if (g_file_test ("../modules/input/immodules.cache", G_FILE_TEST_EXISTS))
g_setenv ("GTK_IM_MODULE_FILE", "../modules/input/immodules.cache", TRUE);
}
int
main (int argc, char **argv)
{
GtkWidget *window;
GtkWidget *grid;
GtkWidget *label;
GtkWidget *pixmap;
GtkWidget *button;
GdkPixbuf *drag_icon;
test_init ();
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (window, "destroy",
G_CALLBACK (gtk_main_quit), NULL);
grid = gtk_grid_new ();
gtk_container_add (GTK_CONTAINER (window), grid);
drag_icon = gdk_pixbuf_new_from_xpm_data (drag_icon_xpm);
trashcan_open = gdk_pixbuf_new_from_xpm_data (trashcan_open_xpm);
trashcan_closed = gdk_pixbuf_new_from_xpm_data (trashcan_closed_xpm);
label = gtk_label_new ("Drop Here\n");
gtk_drag_dest_set (label,
GTK_DEST_DEFAULT_ALL,
target_table, n_targets - 1, /* no rootwin */
GDK_ACTION_COPY | GDK_ACTION_MOVE);
g_signal_connect (label, "drag_data_received",
G_CALLBACK( label_drag_data_received), NULL);
gtk_widget_set_hexpand (label, TRUE);
gtk_widget_set_vexpand (label, TRUE);
gtk_grid_attach (GTK_GRID (grid), label, 0, 0, 1, 1);
label = gtk_label_new ("Popup\n");
gtk_drag_dest_set (label,
GTK_DEST_DEFAULT_ALL,
target_table, n_targets - 1, /* no rootwin */
GDK_ACTION_COPY | GDK_ACTION_MOVE);
gtk_widget_set_hexpand (label, TRUE);
gtk_widget_set_vexpand (label, TRUE);
gtk_grid_attach (GTK_GRID (grid), label, 1, 1, 1, 1);
g_signal_connect (label, "drag_motion",
G_CALLBACK (popsite_motion), NULL);
g_signal_connect (label, "drag_leave",
G_CALLBACK (popsite_leave), NULL);
pixmap = gtk_image_new_from_pixbuf (trashcan_closed);
gtk_drag_dest_set (pixmap, 0, NULL, 0, 0);
gtk_widget_set_hexpand (pixmap, TRUE);
gtk_widget_set_vexpand (pixmap, TRUE);
gtk_grid_attach (GTK_GRID (grid), pixmap, 1, 0, 1, 1);
g_signal_connect (pixmap, "drag_leave",
G_CALLBACK (target_drag_leave), NULL);
g_signal_connect (pixmap, "drag_motion",
G_CALLBACK (target_drag_motion), NULL);
g_signal_connect (pixmap, "drag_drop",
G_CALLBACK (target_drag_drop), NULL);
g_signal_connect (pixmap, "drag_data_received",
G_CALLBACK (target_drag_data_received), NULL);
/* Drag site */
button = gtk_button_new_with_label ("Drag Here\n");
gtk_drag_source_set (button, GDK_BUTTON1_MASK | GDK_BUTTON3_MASK,
target_table, n_targets,
GDK_ACTION_COPY | GDK_ACTION_MOVE);
gtk_drag_source_set_icon_pixbuf (button, drag_icon);
g_object_unref (drag_icon);
gtk_widget_set_hexpand (button, TRUE);
gtk_widget_set_vexpand (button, TRUE);
gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 1, 1);
g_signal_connect (button, "drag_data_get",
G_CALLBACK (source_drag_data_get), NULL);
g_signal_connect (button, "drag_data_delete",
G_CALLBACK (source_drag_data_delete), NULL);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}
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