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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/events/gesture_event_details.h"
namespace ui {
GestureEventDetails::GestureEventDetails()
: type_(ET_UNKNOWN), touch_points_(0), oldest_touch_id_(-1) {
}
GestureEventDetails::GestureEventDetails(ui::EventType type)
: type_(type), touch_points_(1), oldest_touch_id_(-1) {
DCHECK_GE(type, ET_GESTURE_TYPE_START);
DCHECK_LE(type, ET_GESTURE_TYPE_END);
}
GestureEventDetails::GestureEventDetails(ui::EventType type,
float delta_x,
float delta_y)
: type_(type), touch_points_(1), oldest_touch_id_(-1) {
DCHECK_GE(type, ET_GESTURE_TYPE_START);
DCHECK_LE(type, ET_GESTURE_TYPE_END);
switch (type_) {
case ui::ET_GESTURE_SCROLL_BEGIN:
data_.scroll_begin.x_hint = delta_x;
data_.scroll_begin.y_hint = delta_y;
break;
case ui::ET_GESTURE_SCROLL_UPDATE:
data_.scroll_update.x = delta_x;
data_.scroll_update.y = delta_y;
break;
case ui::ET_SCROLL_FLING_START:
data_.fling_velocity.x = delta_x;
data_.fling_velocity.y = delta_y;
break;
case ui::ET_GESTURE_TWO_FINGER_TAP:
data_.first_finger_enclosing_rectangle.width = delta_x;
data_.first_finger_enclosing_rectangle.height = delta_y;
break;
case ui::ET_GESTURE_SWIPE:
data_.swipe.left = delta_x < 0;
data_.swipe.right = delta_x > 0;
data_.swipe.up = delta_y < 0;
data_.swipe.down = delta_y > 0;
break;
default:
NOTREACHED() << "Invalid event type for constructor: " << type;
}
}
GestureEventDetails::GestureEventDetails(ui::EventType type,
const GestureEventDetails& other)
: type_(type),
data_(other.data_),
touch_points_(other.touch_points_),
bounding_box_(other.bounding_box_),
oldest_touch_id_(other.oldest_touch_id_) {
DCHECK_GE(type, ET_GESTURE_TYPE_START);
DCHECK_LE(type, ET_GESTURE_TYPE_END);
switch (type) {
case ui::ET_GESTURE_SCROLL_BEGIN:
// Synthetic creation of SCROLL_BEGIN from PINCH_BEGIN is explicitly
// allowed as an exception.
if (other.type() == ui::ET_GESTURE_PINCH_BEGIN)
break;
case ui::ET_GESTURE_SCROLL_UPDATE:
case ui::ET_SCROLL_FLING_START:
case ui::ET_GESTURE_SWIPE:
case ui::ET_GESTURE_PINCH_UPDATE:
DCHECK_EQ(type, other.type()) << " - Invalid gesture conversion from "
<< other.type() << " to " << type;
break;
default:
break;
}
}
GestureEventDetails::Details::Details() {
memset(this, 0, sizeof(Details));
}
} // namespace ui
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