diff options
author | Carlos Garnacho <carlosg@gnome.org> | 2015-07-09 19:34:09 +0200 |
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committer | Carlos Garnacho <carlosg@gnome.org> | 2015-08-12 23:20:25 +0200 |
commit | 5f68a2877df13d25b17299c497cddf7de1096faa (patch) | |
tree | 11fe8f1ed18b7c9c41505363d8e5ba72e6566679 /gtk/gtkgesturerotate.c | |
parent | 068a8449305b2674c6ff4c8ebc97fbe4782b9f35 (diff) | |
download | gtk+-5f68a2877df13d25b17299c497cddf7de1096faa.tar.gz |
gtkgesturerotate: Handle touchpad pinch events
We let these through in GtkEventController::filter, and handle
these especially on GtkGesture::update.
Diffstat (limited to 'gtk/gtkgesturerotate.c')
-rw-r--r-- | gtk/gtkgesturerotate.c | 83 |
1 files changed, 72 insertions, 11 deletions
diff --git a/gtk/gtkgesturerotate.c b/gtk/gtkgesturerotate.c index 5b1aa7c917..ad6be308f8 100644 --- a/gtk/gtkgesturerotate.c +++ b/gtk/gtkgesturerotate.c @@ -45,6 +45,7 @@ enum { struct _GtkGestureRotatePrivate { gdouble initial_angle; + gdouble accum_touchpad_angle; }; static guint signals[LAST_SIGNAL] = { 0 }; @@ -75,33 +76,52 @@ static gboolean _gtk_gesture_rotate_get_angle (GtkGestureRotate *rotate, gdouble *angle) { + GtkGestureRotatePrivate *priv; + const GdkEvent *last_event; gdouble x1, y1, x2, y2; GtkGesture *gesture; gdouble dx, dy; GList *sequences; gesture = GTK_GESTURE (rotate); + priv = gtk_gesture_rotate_get_instance_private (rotate); if (!gtk_gesture_is_recognized (gesture)) return FALSE; sequences = gtk_gesture_get_sequences (gesture); - g_assert (sequences && sequences->next); + if (!sequences) + return FALSE; + + last_event = gtk_gesture_get_last_event (gesture, sequences->data); + + if (last_event->type == GDK_TOUCHPAD_PINCH && + (last_event->touchpad_pinch.phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN || + last_event->touchpad_pinch.phase == GDK_TOUCHPAD_GESTURE_PHASE_UPDATE || + last_event->touchpad_pinch.phase == GDK_TOUCHPAD_GESTURE_PHASE_END)) + { + *angle = priv->accum_touchpad_angle; + } + else + { + if (!sequences->next) + return FALSE; - gtk_gesture_get_point (gesture, sequences->data, &x1, &y1); - gtk_gesture_get_point (gesture, sequences->next->data, &x2, &y2); - g_list_free (sequences); + gtk_gesture_get_point (gesture, sequences->data, &x1, &y1); + gtk_gesture_get_point (gesture, sequences->next->data, &x2, &y2); + g_list_free (sequences); - dx = x1 - x2; - dy = y1 - y2; + dx = x1 - x2; + dy = y1 - y2; - *angle = atan2 (dx, dy); + *angle = atan2 (dx, dy); - /* Invert angle */ - *angle = (2 * G_PI) - *angle; + /* Invert angle */ + *angle = (2 * G_PI) - *angle; - /* And constraint it to 0°-360° */ - *angle = fmod (*angle, 2 * G_PI); + /* And constraint it to 0°-360° */ + *angle = fmod (*angle, 2 * G_PI); + } return TRUE; } @@ -143,14 +163,55 @@ gtk_gesture_rotate_update (GtkGesture *gesture, _gtk_gesture_rotate_check_emit (GTK_GESTURE_ROTATE (gesture)); } +static gboolean +gtk_gesture_rotate_filter_event (GtkEventController *controller, + const GdkEvent *event) +{ + /* Let 2-finger touchpad pinch events go through */ + if (event->type == GDK_TOUCHPAD_PINCH) + { + if (event->touchpad_pinch.n_fingers == 2) + return FALSE; + else + return TRUE; + } + + return GTK_EVENT_CONTROLLER_CLASS (gtk_gesture_rotate_parent_class)->filter_event (controller, event); +} + +static gboolean +gtk_gesture_rotate_handle_event (GtkEventController *controller, + const GdkEvent *event) +{ + GtkGestureRotate *rotate = GTK_GESTURE_ROTATE (controller); + GtkGestureRotatePrivate *priv; + + priv = gtk_gesture_rotate_get_instance_private (rotate); + + if (event->type == GDK_TOUCHPAD_PINCH) + { + if (event->touchpad_pinch.phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN || + event->touchpad_pinch.phase == GDK_TOUCHPAD_GESTURE_PHASE_END) + priv->accum_touchpad_angle = 0; + else if (event->touchpad_pinch.phase == GDK_TOUCHPAD_GESTURE_PHASE_UPDATE) + priv->accum_touchpad_angle += event->touchpad_pinch.angle_delta; + } + + return GTK_EVENT_CONTROLLER_CLASS (gtk_gesture_rotate_parent_class)->handle_event (controller, event); +} + static void gtk_gesture_rotate_class_init (GtkGestureRotateClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); + GtkEventControllerClass *event_controller_class = GTK_EVENT_CONTROLLER_CLASS (klass); GtkGestureClass *gesture_class = GTK_GESTURE_CLASS (klass); object_class->constructor = gtk_gesture_rotate_constructor; + event_controller_class->filter_event = gtk_gesture_rotate_filter_event; + event_controller_class->handle_event = gtk_gesture_rotate_handle_event; + gesture_class->begin = gtk_gesture_rotate_begin; gesture_class->update = gtk_gesture_rotate_update; |