Add API to allow for tracking global gestures
The new API is added to SugarExt. Similar to the KeyGrabber we listen on the root window for the events. We then filter for gestures recognized by an event controller. You can add any event controller of the ones recently added to the toolkit to be tracked and can pass a specific area where the starting point of the gesture should be, it's then allowed to go out of bounds as it moves. Signed-off-by: Carlos Garnacho <carlos@lanedo.com> Acked-by: Simon Schampijer <simon@laptop.org>
This commit is contained in:
Carlos Garnacho
Simon Schampijer
parent
76da9331a4
commit
c5fe8a26f6
@ -47,6 +47,8 @@ libsugarext_la_SOURCES = \
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gsm-xsmp.h \
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sugar-grid.c \
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sugar-grid.h \
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sugar-gesture-grabber.c \
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sugar-gesture-grabber.h \
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sugar-key-grabber.c \
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sugar-key-grabber.h \
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sugar-wm.c \
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377
src/sugar3/sugar-gesture-grabber.c
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377
src/sugar3/sugar-gesture-grabber.c
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@ -0,0 +1,377 @@
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/*
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* Copyright (C) 2012 One laptop per child
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Author: Carlos Garnacho <carlos@lanedo.com>
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*/
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#include <gdk/gdkx.h>
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#include <X11/extensions/XInput2.h>
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#include "sugar-gesture-grabber.h"
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typedef struct _SugarGestureGrabberPriv SugarGestureGrabberPriv;
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typedef struct _ControllerData ControllerData;
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typedef struct _TouchData TouchData;
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struct _TouchData
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{
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GdkDevice *device;
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GdkEventSequence *sequence;
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gboolean consumed;
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};
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struct _ControllerData
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{
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SugarEventController *controller;
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GdkRectangle rect;
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};
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struct _SugarGestureGrabberPriv
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{
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GdkWindow *root_window;
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GArray *controllers;
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GArray *touches;
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guint cancel_timeout_id;
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};
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G_DEFINE_TYPE (SugarGestureGrabber, sugar_gesture_grabber, G_TYPE_OBJECT)
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static void
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_sugar_gesture_grabber_notify_touch (SugarGestureGrabber *grabber,
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GdkDevice *device,
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GdkEventSequence *sequence,
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gboolean handled)
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{
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SugarGestureGrabberPriv *priv = grabber->_priv;
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GdkDisplay *display;
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guint i;
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display = gdk_window_get_display (priv->root_window);
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for (i = 0; i < priv->touches->len; i++) {
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TouchData *data;
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data = &g_array_index (priv->touches, TouchData, i);
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if (device && data->device != device)
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continue;
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if (sequence && data->sequence != sequence)
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continue;
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if (data->consumed)
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continue;
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XIAllowTouchEvents (gdk_x11_display_get_xdisplay (display),
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gdk_x11_device_get_id (data->device),
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GPOINTER_TO_INT (data->sequence),
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gdk_x11_window_get_xid (priv->root_window),
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(handled) ? XIAcceptTouch : XIRejectTouch);
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data->consumed = TRUE;
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}
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}
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static void
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_sugar_gesture_grabber_add_touch (SugarGestureGrabber *grabber,
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GdkDevice *device,
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GdkEventSequence *sequence)
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{
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SugarGestureGrabberPriv *priv = grabber->_priv;
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TouchData data;
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data.device = device;
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data.sequence = sequence;
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data.consumed = FALSE;
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g_array_append_val (priv->touches, data);
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}
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static void
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_sugar_gesture_grabber_remove_touch (SugarGestureGrabber *grabber,
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GdkDevice *device,
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GdkEventSequence *sequence)
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{
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SugarGestureGrabberPriv *priv = grabber->_priv;
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guint i;
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for (i = 0; i < priv->touches->len; i++) {
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TouchData *data;
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data = &g_array_index (priv->touches, TouchData, i);
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if (data->device == device &&
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data->sequence == sequence) {
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g_array_remove_index_fast (priv->touches, i);
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break;
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}
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}
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}
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static gboolean
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_sugar_gesture_grabber_cancel_timeout (SugarGestureGrabber *grabber)
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{
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SugarGestureGrabberPriv *priv = grabber->_priv;
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_sugar_gesture_grabber_notify_touch (grabber, NULL, NULL, FALSE);
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priv->cancel_timeout_id = 0;
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return FALSE;
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}
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static void
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sugar_gesture_grabber_finalize (GObject *object)
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{
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SugarGestureGrabberPriv *priv = SUGAR_GESTURE_GRABBER (object)->_priv;
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guint i;
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if (priv->cancel_timeout_id) {
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g_source_remove (priv->cancel_timeout_id);
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priv->cancel_timeout_id = 0;
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}
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_sugar_gesture_grabber_notify_touch (SUGAR_GESTURE_GRABBER (object),
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NULL, NULL, FALSE);
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for (i = 0; i < priv->controllers->len; i++) {
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ControllerData *data;
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data = &g_array_index (priv->controllers, ControllerData, i);
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g_object_unref (data->controller);
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}
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g_array_free (priv->controllers, TRUE);
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g_array_free (priv->touches, TRUE);
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G_OBJECT_CLASS (sugar_gesture_grabber_parent_class)->finalize (object);
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}
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static void
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sugar_gesture_grabber_class_init (SugarGestureGrabberClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = sugar_gesture_grabber_finalize;
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g_type_class_add_private (klass, sizeof (SugarGestureGrabberPriv));
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}
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static void
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_grab_touch_events (GdkWindow *window)
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{
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XIGrabModifiers mods = { 1 };
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unsigned char mask[4] = { 0 };
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GdkDisplay *display;
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XIEventMask evmask;
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XISetMask (mask, XI_TouchBegin);
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XISetMask (mask, XI_TouchUpdate);
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XISetMask (mask, XI_TouchEnd);
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evmask.deviceid = XIAllMasterDevices;
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evmask.mask_len = sizeof (mask);
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evmask.mask = mask;
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mods.modifiers = XIAnyModifier;
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display = gdk_window_get_display (window);
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XIGrabTouchBegin (gdk_x11_display_get_xdisplay (display),
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XIAllMasterDevices,
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gdk_x11_window_get_xid (window),
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XINoOwnerEvents, &evmask, 1, &mods);
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}
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static GdkWindow *
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_get_default_root_window (void)
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{
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GdkDisplay *display;
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GdkScreen *screen;
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display = gdk_display_get_default ();
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screen = gdk_display_get_default_screen (display);
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return gdk_screen_get_root_window (screen);
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}
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static gboolean
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_sugar_gesture_grabber_run_controllers (SugarGestureGrabber *grabber,
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GdkEvent *event)
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{
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SugarGestureGrabberPriv *priv = grabber->_priv;
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gboolean handled = FALSE;
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guint i;
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for (i = 0; i < priv->controllers->len; i++) {
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ControllerData *data;
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data = &g_array_index (priv->controllers, ControllerData, i);
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if (event->type == GDK_TOUCH_BEGIN &&
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(event->touch.x_root < data->rect.x ||
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event->touch.x_root > data->rect.x + data->rect.width ||
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event->touch.y_root < data->rect.y ||
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event->touch.y_root > data->rect.y + data->rect.height))
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continue;
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handled = sugar_event_controller_handle_event (data->controller,
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event);
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if (handled) {
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guint state;
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state = sugar_event_controller_get_state (data->controller);
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if (state == SUGAR_EVENT_CONTROLLER_STATE_RECOGNIZED) {
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_sugar_gesture_grabber_notify_touch (grabber,
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event->touch.device,
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event->touch.sequence,
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TRUE);
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}
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}
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}
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return handled;
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}
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static GdkFilterReturn
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filter_function (GdkXEvent *xevent,
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GdkEvent *gdkevent,
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gpointer user_data)
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{
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XGenericEventCookie *xge = xevent;
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GdkDeviceManager *device_manager;
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SugarGestureGrabber *grabber;
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SugarGestureGrabberPriv *priv;
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gboolean handled = FALSE;
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GdkDevice *device;
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XIDeviceEvent *ev;
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GdkDisplay *display;
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GdkEvent *event;
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if (xge->type != GenericEvent)
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return GDK_FILTER_CONTINUE;
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grabber = user_data;
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priv = grabber->_priv;
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display = gdk_window_get_display (priv->root_window);
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device_manager = gdk_display_get_device_manager (display);
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ev = (XIDeviceEvent *) xge->data;
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switch (ev->evtype) {
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case XI_TouchBegin:
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event = gdk_event_new (GDK_TOUCH_BEGIN);
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break;
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case XI_TouchEnd:
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event = gdk_event_new (GDK_TOUCH_END);
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break;
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case XI_TouchUpdate:
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event = gdk_event_new (GDK_TOUCH_UPDATE);
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break;
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default:
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return GDK_FILTER_CONTINUE;
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}
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event->touch.window = g_object_ref (priv->root_window);
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event->touch.time = ev->time;
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event->touch.x = ev->event_x;
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event->touch.y = ev->event_y;
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event->touch.x_root = ev->root_x;
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event->touch.y_root = ev->root_y;
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event->touch.sequence = GINT_TO_POINTER (ev->detail);
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event->touch.emulating_pointer = (ev->flags & XITouchEmulatingPointer);
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device = gdk_x11_device_manager_lookup (device_manager, ev->deviceid);
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gdk_event_set_device (event, device);
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device = gdk_x11_device_manager_lookup (device_manager, ev->sourceid);
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gdk_event_set_source_device (event, device);
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handled = _sugar_gesture_grabber_run_controllers (grabber, event);
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if (!handled) {
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XIAllowTouchEvents (gdk_x11_display_get_xdisplay (display),
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ev->deviceid, ev->detail,
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gdk_x11_window_get_xid (priv->root_window),
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XIRejectTouch);
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} else if (event->type == GDK_TOUCH_BEGIN) {
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_sugar_gesture_grabber_add_touch (grabber,
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event->touch.device,
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event->touch.sequence);
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} else if (event->type == GDK_TOUCH_END) {
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_sugar_gesture_grabber_notify_touch (grabber,
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event->touch.device,
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event->touch.sequence,
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FALSE);
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_sugar_gesture_grabber_remove_touch (grabber,
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event->touch.device,
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event->touch.sequence);
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}
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if (handled) {
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if (priv->cancel_timeout_id)
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g_source_remove (priv->cancel_timeout_id);
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priv->cancel_timeout_id =
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gdk_threads_add_timeout (150,
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(GSourceFunc) _sugar_gesture_grabber_cancel_timeout,
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grabber);
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}
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gdk_event_free (event);
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return GDK_FILTER_REMOVE;
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}
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static void
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sugar_gesture_grabber_init (SugarGestureGrabber *grabber)
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{
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SugarGestureGrabberPriv *priv;
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grabber->_priv = priv = G_TYPE_INSTANCE_GET_PRIVATE (grabber,
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SUGAR_TYPE_GESTURE_GRABBER,
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SugarGestureGrabberPriv);
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priv->root_window = _get_default_root_window ();
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_grab_touch_events (priv->root_window);
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gdk_window_add_filter (NULL, filter_function, grabber);
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priv->touches = g_array_new (FALSE, FALSE, sizeof (TouchData));
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priv->controllers = g_array_new (FALSE, FALSE, sizeof (ControllerData));
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}
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SugarGestureGrabber *
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sugar_gesture_grabber_new (void)
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{
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return g_object_new (SUGAR_TYPE_GESTURE_GRABBER, NULL);
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}
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void
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sugar_gesture_grabber_add (SugarGestureGrabber *grabber,
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SugarEventController *controller,
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const GdkRectangle *rect)
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{
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SugarGestureGrabberPriv *priv;
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ControllerData data;
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g_return_if_fail (SUGAR_IS_GESTURE_GRABBER (grabber));
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g_return_if_fail (SUGAR_IS_EVENT_CONTROLLER (controller));
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priv = grabber->_priv;
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data.controller = g_object_ref (controller);
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data.rect = *rect;
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g_array_append_val (priv->controllers, data);
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}
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57
src/sugar3/sugar-gesture-grabber.h
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57
src/sugar3/sugar-gesture-grabber.h
Normal file
@ -0,0 +1,57 @@
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/*
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* Copyright (C) 2012 One laptop per child
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Author: Carlos Garnacho <carlos@lanedo.com>
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*/
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#ifndef __SUGAR_GESTURE_GRABBER_H__
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#define __SUGAR_GESTURE_GRABBER_H__
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#include <gtk/gtk.h>
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#include "event-controller/sugar-event-controllers.h"
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G_BEGIN_DECLS
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typedef struct _SugarGestureGrabber SugarGestureGrabber;
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typedef struct _SugarGestureGrabberClass SugarGestureGrabberClass;
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#define SUGAR_TYPE_GESTURE_GRABBER (sugar_gesture_grabber_get_type())
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#define SUGAR_GESTURE_GRABBER(object) (G_TYPE_CHECK_INSTANCE_CAST((object), SUGAR_TYPE_GESTURE_GRABBER, SugarGestureGrabber))
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#define SUGAR_GESTURE_GRABBER_CLASS(klass) (G_TYPE_CHACK_CLASS_CAST((klass), SUGAR_TYPE_GESTURE_GRABBER, SugarGestureGrabberClass))
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#define SUGAR_IS_GESTURE_GRABBER(object) (G_TYPE_CHECK_INSTANCE_TYPE((object), SUGAR_TYPE_GESTURE_GRABBER))
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#define SUGAR_IS_GESTURE_GRABBER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), SUGAR_TYPE_GESTURE_GRABBER))
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#define SUGAR_GESTURE_GRABBER_GET_CLASS(object) (G_TYPE_INSTANCE_GET_CLASS((object), SUGAR_TYPE_GESTURE_GRABBER, SugarGestureGrabberClass))
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struct _SugarGestureGrabber {
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GObject parent_instance;
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gpointer _priv;
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};
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struct _SugarGestureGrabberClass {
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GObjectClass parent_class;
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};
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GType sugar_gesture_grabber_get_type (void);
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SugarGestureGrabber * sugar_gesture_grabber_new (void);
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void sugar_gesture_grabber_add (SugarGestureGrabber *grabber,
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SugarEventController *controller,
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const GdkRectangle *rect);
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G_END_DECLS
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#endif /* __SUGAR_GESTURE_GRABBER_H__ */
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