From d07c43f9f19dc0ee38aaf44947cfc396f437490e Mon Sep 17 00:00:00 2001 From: Henrik Rydberg Date: Tue, 3 Aug 2010 15:01:50 +0200 Subject: Introduce zoom, rotate and combo gestures Introduce grail_mask bit functions, and add new gestures as separate functions, referring to the same move model. Signed-off-by: Henrik Rydberg --- src/gestures-zoom.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 src/gestures-zoom.c (limited to 'src/gestures-zoom.c') diff --git a/src/gestures-zoom.c b/src/gestures-zoom.c new file mode 100644 index 0000000..9e05b8b --- /dev/null +++ b/src/gestures-zoom.c @@ -0,0 +1,71 @@ +/***************************************************************************** + * + * grail - Gesture Recognition And Instantiation Library + * + * Copyright (C) 2010 Canonical Ltd. + * + * 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 . + * + * Authors: + * Henrik Rydberg + * + ****************************************************************************/ + +#include "grail-recognizer.h" +#include +#include + +void gru_reset_zoom(struct grail *ge, + const struct touch_frame *frame) +{ + struct gesture_inserter *gin = ge->gin; + struct gesture_recognizer *gru = ge->gru; + struct zoom_model *state = &gru->zoom; + struct move_model *move = &gru->move; + gin_gesture_discard_type(gin, GRAIL_TYPE_ZOOM); + state->r = move->r; + state->active = 0; + state->zooming = 0; +} + +int gru_zoom(struct grail *ge, + const struct touch_frame *frame) +{ + struct gesture_inserter *gin = ge->gin; + struct gesture_recognizer *gru = ge->gru; + struct zoom_model *state = &gru->zoom; + struct move_model *move = &gru->move; + grail_prop_t prop[DIM_GRAIL_PROP]; + float dr; + int i; + dr = move->r - state->r; + if (fabs(dr) < 1) + return 0; + if (!state->active) { + i = gin_gesture_begin(ge, + GRAIL_TYPE_ZOOM, 1, + frame->touches, sizeof(frame->touches)); + state->geslot = i; + state->active = 1; + } + if (!state->zooming && fabs(dr) < move->rbar) + return 0; + state->zooming = 1; + prop[0] = dr; + gin_gesture_event(gin, state->geslot, + move->x, move->y, move->ntouch, + prop, 1); + state->r = move->r; + return 1; +} -- cgit v1.2.3