ui/events/gesture_event_details.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/events/gesture_event_details.h"
   6
   7 namespace ui {
   8
   9 GestureEventDetails::GestureEventDetails()
  10     : type_(ET_UNKNOWN), touch_points_(0), oldest_touch_id_(-1) {
  11 }
  12
  13 GestureEventDetails::GestureEventDetails(ui::EventType type)
  14     : type_(type), touch_points_(1), oldest_touch_id_(-1) {
  15   DCHECK_GE(type, ET_GESTURE_TYPE_START);
  16   DCHECK_LE(type, ET_GESTURE_TYPE_END);
  17 }
  18
  19 GestureEventDetails::GestureEventDetails(ui::EventType type,
  20                                          float delta_x,
  21                                          float delta_y)
  22     : type_(type), touch_points_(1), oldest_touch_id_(-1) {
  23   DCHECK_GE(type, ET_GESTURE_TYPE_START);
  24   DCHECK_LE(type, ET_GESTURE_TYPE_END);
  25   switch (type_) {
  26     case ui::ET_GESTURE_SCROLL_BEGIN:
  27       data.scroll_begin.x_hint = delta_x;
  28       data.scroll_begin.y_hint = delta_y;
  29       break;
  30
  31     case ui::ET_GESTURE_SCROLL_UPDATE:
  32       data.scroll_update.x = delta_x;
  33       data.scroll_update.y = delta_y;
  34       break;
  35
  36     case ui::ET_SCROLL_FLING_START:
  37       data.fling_velocity.x = delta_x;
  38       data.fling_velocity.y = delta_y;
  39       break;
  40
  41     case ui::ET_GESTURE_TWO_FINGER_TAP:
  42       data.first_finger_enclosing_rectangle.width = delta_x;
  43       data.first_finger_enclosing_rectangle.height = delta_y;
  44       break;
  45
  46     case ui::ET_GESTURE_SWIPE:
  47       data.swipe.left = delta_x < 0;
  48       data.swipe.right = delta_x > 0;
  49       data.swipe.up = delta_y < 0;
  50       data.swipe.down = delta_y > 0;
  51       break;
  52
  53     default:
  54       NOTREACHED() << "Invalid event type for constructor: " << type;
  55   }
  56 }
  57
  58 GestureEventDetails::Details::Details() {
  59   memset(this, 0, sizeof(Details));
  60 }
  61
  62 }  // namespace ui