diff --git a/gtk/gtkgesture.c b/gtk/gtkgesture.c index 53be0c6075..58a4a521e0 100644 --- a/gtk/gtkgesture.c +++ b/gtk/gtkgesture.c @@ -138,6 +138,11 @@ struct _PointData GdkEvent *event; gdouble widget_x; gdouble widget_y; + + /* Acummulators for touchpad events */ + gdouble accum_dx; + gdouble accum_dy; + guint press_handled : 1; guint state : 2; }; @@ -400,6 +405,55 @@ _find_widget_window (GtkGesture *gesture, return NULL; } +static void +_update_touchpad_deltas (PointData *data) +{ + GdkEvent *event = data->event; + + if (!event) + return; + + if (event->type == GDK_TOUCHPAD_SWIPE) + { + if (event->touchpad_swipe.phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN) + data->accum_dx = data->accum_dy = 0; + else if (event->touchpad_swipe.phase == GDK_TOUCHPAD_GESTURE_PHASE_UPDATE) + { + data->accum_dx += event->touchpad_swipe.dx; + data->accum_dy += event->touchpad_swipe.dy; + } + } + else if (event->type == GDK_TOUCHPAD_PINCH) + { + if (event->touchpad_pinch.phase == GDK_TOUCHPAD_GESTURE_PHASE_BEGIN) + data->accum_dx = data->accum_dy = 0; + else if (event->touchpad_pinch.phase == GDK_TOUCHPAD_GESTURE_PHASE_UPDATE) + { + data->accum_dx += event->touchpad_pinch.dx; + data->accum_dy += event->touchpad_pinch.dy; + } + } +} + +static void +_get_event_coordinates (PointData *data, + gdouble *x, + gdouble *y) +{ + gdouble event_x, event_y; + + g_assert (data->event != NULL); + + gdk_event_get_coords (data->event, &event_x, &event_y); + event_x += data->accum_dx; + event_y += data->accum_dy; + + if (x) + *x = event_x; + if (y) + *y = event_y; +} + static void _update_widget_coordinates (GtkGesture *gesture, PointData *data) @@ -413,7 +467,7 @@ _update_widget_coordinates (GtkGesture *gesture, event_widget = gtk_get_event_widget (data->event); widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)); event_widget_window = gtk_widget_get_window (event_widget); - gdk_event_get_coords (data->event, &event_x, &event_y); + _get_event_coordinates (data, &event_x, &event_y); window = data->event->any.window; while (window && window != event_widget_window) @@ -540,6 +594,7 @@ _gtk_gesture_update_point (GtkGesture *gesture, gdk_event_free (data->event); data->event = gdk_event_copy (event); + _update_touchpad_deltas (data); _update_widget_coordinates (gesture, data); /* Deny the sequence right away if the expected