PIKApp/app/display/pikadisplayshell-grab.c

123 lines
3.6 KiB
C

/* PIKA - Photo and Image Kooker Application
* a rebranding of The GNU Image Manipulation Program (created with heckimp)
* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
*
* Original copyright, applying to most contents (license remains unchanged):
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* pikadisplayshell-grab.c
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "display-types.h"
#include "widgets/pikadevices.h"
#include "pikadisplay.h"
#include "pikadisplayshell.h"
#include "pikadisplayshell-grab.h"
static GdkDevice *
get_associated_pointer (GdkDevice *device)
{
switch (gdk_device_get_device_type (device))
{
case GDK_DEVICE_TYPE_SLAVE:
device = gdk_device_get_associated_device (device);
break;
case GDK_DEVICE_TYPE_FLOATING:
{
GdkDisplay *display = gdk_device_get_display (device);
GdkSeat *seat = gdk_display_get_default_seat (display);
return gdk_seat_get_pointer (seat);
}
break;
default:
break;
}
if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
device = gdk_device_get_associated_device (device);
return device;
}
gboolean
pika_display_shell_pointer_grab (PikaDisplayShell *shell,
const GdkEvent *event,
GdkEventMask event_mask)
{
GdkDevice *device;
GdkDevice *source_device;
GdkGrabStatus status;
g_return_val_if_fail (PIKA_IS_DISPLAY_SHELL (shell), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
g_return_val_if_fail (shell->grab_pointer == NULL, FALSE);
source_device = pika_devices_get_from_event (shell->display->pika,
event, &device);
if (gdk_device_get_source (device) == GDK_SOURCE_KEYBOARD)
{
device = get_associated_pointer (device);
source_device = NULL;
}
status = gdk_device_grab (device,
gtk_widget_get_window (shell->canvas),
GDK_OWNERSHIP_APPLICATION,
FALSE, event_mask, NULL,
gdk_event_get_time (event));
if (status == GDK_GRAB_SUCCESS)
{
shell->grab_pointer = device;
shell->grab_pointer_source = source_device;
shell->grab_pointer_time = gdk_event_get_time (event);
return TRUE;
}
g_printerr ("%s: gdk_device_grab(%s) failed with status %d\n",
G_STRFUNC, gdk_device_get_name (device), status);
return FALSE;
}
void
pika_display_shell_pointer_ungrab (PikaDisplayShell *shell,
const GdkEvent *event)
{
g_return_if_fail (PIKA_IS_DISPLAY_SHELL (shell));
g_return_if_fail (event != NULL);
g_return_if_fail (shell->grab_pointer != NULL);
gdk_device_ungrab (shell->grab_pointer, shell->grab_pointer_time);
shell->grab_pointer = NULL;
shell->grab_pointer_source = NULL;
shell->grab_pointer_time = 0;
}