gtk2/tests/testdnd.c
Caolán McNamara bbf7454fc9 make testdnd trashcan work again
so that dragging into the 'trashcan' is detected
2021-06-23 15:09:44 +01:00

598 lines
22 KiB
C

/* 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;
static GdkDragAction
action_make_unique (GdkDragAction action)
{
if (gdk_drag_action_is_unique (action))
return action;
if (action & GDK_ACTION_COPY)
return GDK_ACTION_COPY;
if (action & GDK_ACTION_MOVE)
return GDK_ACTION_MOVE;
if (action & GDK_ACTION_LINK)
return GDK_ACTION_LINK;
g_assert_not_reached ();
return 0;
}
static GdkDragAction
trash_drag_enter (GtkDropTarget *dest,
GdkDrop *drop,
double x,
double y,
GtkWidget *widget)
{
char *s;
gtk_image_set_from_pixbuf (GTK_IMAGE (widget), trashcan_open);
s = gdk_content_formats_to_string (gdk_drop_get_formats (drop));
g_print ("trash enter: %s\n", s);
g_free (s);
return action_make_unique (gdk_drop_get_actions (drop));;
}
static GdkDragAction
trash_drag_leave (GtkDropTarget *dest,
GdkDrop *drop,
GtkWidget *widget)
{
char *s;
gtk_image_set_from_pixbuf (GTK_IMAGE (widget), trashcan_closed);
s = gdk_content_formats_to_string (gdk_drop_get_formats (drop));
g_print ("trash leave: %s\n", s);
g_free (s);
return action_make_unique (gdk_drop_get_actions (drop));
}
static gboolean
trash_drag_drop (GtkDropTarget *dest,
GdkDrop *drop,
double x,
double y,
GtkWidget *widget)
{
char *s;
s = gdk_content_formats_to_string (gdk_drop_get_formats (drop));
g_print ("trash drop: %s\n", s);
g_free (s);
gdk_drop_finish (drop, action_make_unique (gdk_drop_get_actions (drop)));
return TRUE;
}
static gboolean
label_drag_drop (GtkDropTarget *dest,
const GValue *value,
int x,
int y,
GtkWidget *widget)
{
g_print ("Received \"%s\" in label\n", g_value_get_string (value));
return TRUE;
}
/* 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;
static int
popdown_cb (gpointer data)
{
popdown_timer = 0;
gtk_widget_hide (popup_window);
popped_up = FALSE;
return FALSE;
}
static void
popup_enter (GtkDropTarget *dest)
{
g_print ("popup enter\n");
if (!in_popup)
{
in_popup = TRUE;
if (popdown_timer)
{
g_print ("removed popdown\n");
g_source_remove (popdown_timer);
popdown_timer = 0;
}
}
}
static void
popup_leave (GtkDropTarget *dest)
{
g_print ("popup leave\n");
if (in_popup)
{
in_popup = FALSE;
if (!popdown_timer)
{
g_print ("added popdown\n");
popdown_timer = g_timeout_add (500, popdown_cb, NULL);
}
}
}
static gboolean
popup_drop (GtkDropTarget *dest)
{
popdown_cb (NULL);
return TRUE;
}
static gboolean
popup_cb (gpointer data)
{
if (!popped_up)
{
if (!popup_window)
{
GtkWidget *button;
GtkWidget *grid;
int i, j;
popup_window = gtk_window_new ();
grid = gtk_grid_new ();
for (i=0; i<3; i++)
for (j=0; j<3; j++)
{
char buffer[128];
GtkDropTarget *dest;
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);
dest = gtk_drop_target_new (G_TYPE_STRING, GDK_ACTION_COPY | GDK_ACTION_MOVE);
g_signal_connect (dest, "enter", G_CALLBACK (popup_enter), NULL);
g_signal_connect (dest, "leave", G_CALLBACK (popup_leave), NULL);
g_signal_connect (dest, "drop", G_CALLBACK (popup_drop), NULL);
gtk_widget_add_controller (button, GTK_EVENT_CONTROLLER (dest));
}
gtk_window_set_child (GTK_WINDOW (popup_window), grid);
}
gtk_widget_show (popup_window);
popped_up = TRUE;
}
popup_timer = FALSE;
return FALSE;
}
static void
popsite_enter (GtkDropControllerMotion *motion)
{
g_print ("popsite enter\n");
if (!popup_timer)
popup_timer = g_timeout_add (500, popup_cb, NULL);
}
static void
popsite_leave (GtkDropControllerMotion *motion)
{
g_print ("popsite leave\n");
if (popup_timer)
{
g_source_remove (popup_timer);
popup_timer = 0;
}
}
static void
quit_cb (GtkWidget *widget,
gpointer data)
{
gboolean *done = data;
*done = TRUE;
g_main_context_wakeup (NULL);
}
int
main (int argc, char **argv)
{
GtkWidget *window;
GtkWidget *grid;
GtkWidget *label;
GtkWidget *pixmap;
GtkWidget *button;
GdkPixbuf *drag_icon;
GdkTexture *texture;
GdkContentProvider *content;
GtkDragSource *source;
GtkDropTarget *dest;
GtkDropTargetAsync *async;
GtkEventController *controller;
gboolean done = FALSE;
gtk_init ();
window = gtk_window_new ();
g_signal_connect (window, "destroy",
G_CALLBACK (quit_cb), &done);
grid = gtk_grid_new ();
gtk_window_set_child (GTK_WINDOW (window), grid);
drag_icon = gdk_pixbuf_new_from_xpm_data (drag_icon_xpm);
texture = gdk_texture_new_for_pixbuf (drag_icon);
g_object_unref (drag_icon);
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");
dest = gtk_drop_target_new (G_TYPE_STRING, GDK_ACTION_COPY | GDK_ACTION_MOVE);
g_signal_connect (dest, "drop", G_CALLBACK (label_drag_drop), NULL);
gtk_widget_add_controller (label, GTK_EVENT_CONTROLLER (dest));
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");
controller = gtk_drop_controller_motion_new ();
g_signal_connect (controller, "enter", G_CALLBACK (popsite_enter), NULL);
g_signal_connect (controller, "leave", G_CALLBACK (popsite_leave), NULL);
gtk_widget_add_controller (label, controller);
gtk_widget_set_hexpand (label, TRUE);
gtk_widget_set_vexpand (label, TRUE);
gtk_grid_attach (GTK_GRID (grid), label, 1, 1, 1, 1);
pixmap = gtk_image_new_from_pixbuf (trashcan_closed);
async = gtk_drop_target_async_new (NULL, GDK_ACTION_ALL);
g_signal_connect (async, "drag-enter", G_CALLBACK (trash_drag_enter), pixmap);
g_signal_connect (async, "drag-leave", G_CALLBACK (trash_drag_leave), pixmap);
g_signal_connect (async, "drop", G_CALLBACK (trash_drag_drop), pixmap);
gtk_widget_add_controller (pixmap, GTK_EVENT_CONTROLLER (async));
gtk_widget_set_hexpand (pixmap, TRUE);
gtk_widget_set_vexpand (pixmap, TRUE);
gtk_grid_attach (GTK_GRID (grid), pixmap, 1, 0, 1, 1);
/* Drag site */
button = gtk_label_new ("Drag Here\n");
source = gtk_drag_source_new ();
content = gdk_content_provider_new_typed (G_TYPE_STRING, "I'm data!");
gtk_drag_source_set_content (source, content);
g_object_unref (content);
gtk_drag_source_set_actions (source, GDK_ACTION_COPY|GDK_ACTION_MOVE);
gtk_widget_add_controller (button, GTK_EVENT_CONTROLLER (source));
gtk_drag_source_set_icon (source, GDK_PAINTABLE (texture), 0, 0);
g_object_unref (texture);
gtk_widget_set_hexpand (button, TRUE);
gtk_widget_set_vexpand (button, TRUE);
gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 1, 1);
gtk_widget_show (window);
while (!done)
g_main_context_iteration (NULL, TRUE);
return 0;
}