| // 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) {} |
| |
| GestureEventDetails::GestureEventDetails(ui::EventType type, |
| float delta_x, |
| float delta_y) |
| : type_(type), |
| touch_points_(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_PINCH_UPDATE: |
| data.scale = delta_x; |
| CHECK_EQ(0.f, delta_y) << "Unknown data in delta_y for pinch"; |
| 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; |
| |
| case ui::ET_GESTURE_TAP: |
| case ui::ET_GESTURE_DOUBLE_TAP: |
| case ui::ET_GESTURE_TAP_UNCONFIRMED: |
| data.tap_count = static_cast<int>(delta_x); |
| CHECK_EQ(0.f, delta_y) << "Unknown data in delta_y for tap."; |
| break; |
| |
| default: |
| if (delta_x != 0.f || delta_y != 0.f) { |
| DLOG(WARNING) << "A gesture event (" << type << ") had unknown data: (" |
| << delta_x << "," << delta_y; |
| } |
| break; |
| } |
| } |
| |
| GestureEventDetails::Details::Details() { |
| memset(this, 0, sizeof(Details)); |
| } |
| |
| } // namespace ui |