ui/views/rect_based_targeting_utils.cc

   1 // Copyright 2013 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/views/rect_based_targeting_utils.h"
   6
   7 #include "ui/gfx/point.h"
   8 #include "ui/gfx/rect.h"
   9
  10 namespace views {
  11
  12 bool UsePointBasedTargeting(const gfx::Rect& rect) {
  13   return rect.width() == 1 && rect.height() == 1;
  14 }
  15
  16 float PercentCoveredBy(const gfx::Rect& rect_1, const gfx::Rect& rect_2) {
  17   gfx::Rect intersection(rect_1);
  18   intersection.Intersect(rect_2);
  19   int intersect_area = intersection.size().GetArea();
  20   int rect_1_area = rect_1.size().GetArea();
  21   return rect_1_area ?
  22       static_cast<float>(intersect_area) / static_cast<float>(rect_1_area) : 0;
  23 }
  24
  25 int DistanceSquaredFromCenterToPoint(const gfx::Point& point,
  26                                      const gfx::Rect& rect) {
  27   gfx::Point center_point = rect.CenterPoint();
  28   int dx = center_point.x() - point.x();
  29   int dy = center_point.y() - point.y();
  30   return (dx * dx) + (dy * dy);
  31 }
  32
  33 }  // namespace views