ui/views/mouse_watcher_view_host.cc

   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/views/mouse_watcher_view_host.h"
   6
   7 #include "ui/gfx/screen.h"
   8 #include "ui/views/view.h"
   9 #include "ui/views/widget/widget.h"
  10
  11 namespace views {
  12
  13 MouseWatcherViewHost::MouseWatcherViewHost(View* view,
  14                                            const gfx::Insets& hot_zone_insets)
  15     : view_(view),
  16       hot_zone_insets_(hot_zone_insets) {
  17 }
  18
  19 MouseWatcherViewHost::~MouseWatcherViewHost() {
  20 }
  21
  22 bool MouseWatcherViewHost::Contains(
  23     const gfx::Point& screen_point,
  24     MouseEventType type) {
  25   bool in_view = IsCursorInViewZone(screen_point);
  26   if (!in_view || (type == MOUSE_EXIT && !IsMouseOverWindow()))
  27     return false;
  28   return true;
  29 }
  30
  31 // Returns whether or not the cursor is currently in the view's "zone" which
  32 // is defined as a slightly larger region than the view.
  33 bool MouseWatcherViewHost::IsCursorInViewZone(const gfx::Point& screen_point) {
  34   gfx::Rect bounds = view_->GetLocalBounds();
  35   gfx::Point view_topleft(bounds.origin());
  36   View::ConvertPointToScreen(view_, &view_topleft);
  37   bounds.set_origin(view_topleft);
  38   bounds.SetRect(view_topleft.x() - hot_zone_insets_.left(),
  39                  view_topleft.y() - hot_zone_insets_.top(),
  40                  bounds.width() + hot_zone_insets_.width(),
  41                  bounds.height() + hot_zone_insets_.height());
  42
  43   return bounds.Contains(screen_point.x(), screen_point.y());
  44 }
  45
  46 // Returns true if the mouse is over the view's window.
  47 bool MouseWatcherViewHost::IsMouseOverWindow() {
  48   Widget* widget = view_->GetWidget();
  49   if (!widget)
  50     return false;
  51
  52   return gfx::Screen::GetScreenFor(widget->GetNativeView())->
  53       GetWindowUnderCursor() == widget->GetNativeWindow();
  54 }
  55
  56 }  // namespace views