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      1 // Copyright (c) 2012 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/gestures/gesture_types.h"
      6 
      7 namespace ui {
      8 
      9 GestureEventDetails::GestureEventDetails(ui::EventType type,
     10                                          float delta_x,
     11                                          float delta_y)
     12     : type_(type),
     13       touch_points_(1) {
     14   switch (type_) {
     15     case ui::ET_GESTURE_SCROLL_UPDATE:
     16       data.scroll_update.x = delta_x;
     17       data.scroll_update.y = delta_y;
     18       data.scroll_update.x_ordinal = delta_x;
     19       data.scroll_update.y_ordinal = delta_y;
     20       break;
     21 
     22     case ui::ET_SCROLL_FLING_START:
     23       data.fling_velocity.x = delta_x;
     24       data.fling_velocity.y = delta_y;
     25       data.fling_velocity.x_ordinal = delta_x;
     26       data.fling_velocity.y_ordinal = delta_y;
     27       break;
     28 
     29     case ui::ET_GESTURE_LONG_PRESS:
     30       data.touch_id = static_cast<int>(delta_x);
     31       CHECK_EQ(0.f, delta_y) << "Unknown data in delta_y for long press.";
     32       break;
     33 
     34     case ui::ET_GESTURE_TWO_FINGER_TAP:
     35       data.first_finger_enclosing_rectangle.width = delta_x;
     36       data.first_finger_enclosing_rectangle.height = delta_y;
     37       break;
     38 
     39     case ui::ET_GESTURE_PINCH_UPDATE:
     40       data.scale = delta_x;
     41       CHECK_EQ(0.f, delta_y) << "Unknown data in delta_y for pinch";
     42       break;
     43 
     44     case ui::ET_GESTURE_MULTIFINGER_SWIPE:
     45       data.swipe.left = delta_x < 0;
     46       data.swipe.right = delta_x > 0;
     47       data.swipe.up = delta_y < 0;
     48       data.swipe.down = delta_y > 0;
     49       break;
     50 
     51     case ui::ET_GESTURE_TAP:
     52       data.tap_count = static_cast<int>(delta_x);
     53       CHECK_EQ(0.f, delta_y) << "Unknown data in delta_y for tap.";
     54       break;
     55 
     56     default:
     57       if (delta_x != 0.f || delta_y != 0.f) {
     58         DLOG(WARNING) << "A gesture event (" << type << ") had unknown data: ("
     59                       << delta_x << "," << delta_y;
     60       }
     61       break;
     62   }
     63 }
     64 
     65 GestureEventDetails::GestureEventDetails(ui::EventType type,
     66                                          float delta_x,
     67                                          float delta_y,
     68                                          float delta_x_ordinal,
     69                                          float delta_y_ordinal)
     70     : type_(type),
     71       touch_points_(1) {
     72   CHECK(type == ui::ET_GESTURE_SCROLL_UPDATE ||
     73         type == ui::ET_SCROLL_FLING_START);
     74   switch (type_) {
     75     case ui::ET_GESTURE_SCROLL_UPDATE:
     76       data.scroll_update.x = delta_x;
     77       data.scroll_update.y = delta_y;
     78       data.scroll_update.x_ordinal = delta_x_ordinal;
     79       data.scroll_update.y_ordinal = delta_y_ordinal;
     80       break;
     81 
     82     case ui::ET_SCROLL_FLING_START:
     83       data.fling_velocity.x = delta_x;
     84       data.fling_velocity.y = delta_y;
     85       data.fling_velocity.x_ordinal = delta_x_ordinal;
     86       data.fling_velocity.y_ordinal = delta_y_ordinal;
     87       break;
     88 
     89     default:
     90       break;
     91   }
     92 }
     93 
     94 void GestureEventDetails::SetScrollVelocity(float velocity_x,
     95                                             float velocity_y,
     96                                             float velocity_x_ordinal,
     97                                             float velocity_y_ordinal) {
     98   CHECK_EQ(ui::ET_GESTURE_SCROLL_UPDATE, type_);
     99   data.scroll_update.velocity_x = velocity_x;
    100   data.scroll_update.velocity_y = velocity_y;
    101   data.scroll_update.velocity_x_ordinal = velocity_x_ordinal;
    102   data.scroll_update.velocity_y_ordinal = velocity_y_ordinal;
    103 }
    104 
    105 }  // namespace ui
    106