ui/views/view_targeter.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/views/view_targeter.h"
   6
   7 #include "ui/events/event_target.h"
   8 #include "ui/views/focus/focus_manager.h"
   9 #include "ui/views/view.h"
  10
  11 namespace views {
  12
  13 ViewTargeter::ViewTargeter() {}
  14 ViewTargeter::~ViewTargeter() {}
  15
  16 gfx::RectF ViewTargeter::BoundsForEvent(const ui::LocatedEvent& event) const {
  17   gfx::RectF event_bounds(event.location_f(), gfx::SizeF(1, 1));
  18   if (event.IsGestureEvent()) {
  19     const ui::GestureEvent& gesture =
  20         static_cast<const ui::GestureEvent&>(event);
  21     event_bounds = gesture.details().bounding_box_f();
  22   }
  23
  24   return event_bounds;
  25 }
  26
  27 ui::EventTarget* ViewTargeter::FindTargetForEvent(ui::EventTarget* root,
  28                                                   ui::Event* event) {
  29   View* view = static_cast<View*>(root);
  30   if (event->IsKeyEvent())
  31     return FindTargetForKeyEvent(view, *static_cast<ui::KeyEvent*>(event));
  32   else if (event->IsScrollEvent())
  33     return EventTargeter::FindTargetForEvent(root, event);
  34
  35   NOTREACHED() << "ViewTargeter does not yet support this event type.";
  36   return NULL;
  37 }
  38
  39 ui::EventTarget* ViewTargeter::FindNextBestTarget(
  40     ui::EventTarget* previous_target,
  41     ui::Event* event) {
  42   return previous_target->GetParentTarget();
  43 }
  44
  45 bool ViewTargeter::SubtreeCanAcceptEvent(
  46     ui::EventTarget* target,
  47     const ui::LocatedEvent& event) const {
  48   views::View* view = static_cast<views::View*>(target);
  49   if (!view->visible())
  50     return false;
  51
  52   if (!view->CanProcessEventsWithinSubtree())
  53     return false;
  54
  55   return true;
  56 }
  57
  58 bool ViewTargeter::EventLocationInsideBounds(
  59     ui::EventTarget* target,
  60     const ui::LocatedEvent& event) const {
  61   views::View* view = static_cast<views::View*>(target);
  62   gfx::Rect rect(event.location(), gfx::Size(1, 1));
  63   gfx::RectF rect_in_view_coords_f(rect);
  64   if (view->parent())
  65     View::ConvertRectToTarget(view->parent(), view, &rect_in_view_coords_f);
  66   gfx::Rect rect_in_view_coords = gfx::ToEnclosingRect(rect_in_view_coords_f);
  67
  68   // TODO(tdanderson): Don't call into HitTestRect() directly here.
  69   //                   See crbug.com/370579.
  70   return view->HitTestRect(rect_in_view_coords);
  71 }
  72
  73 View* ViewTargeter::FindTargetForKeyEvent(View* view, const ui::KeyEvent& key) {
  74   if (view->GetFocusManager())
  75     return view->GetFocusManager()->GetFocusedView();
  76   return NULL;
  77 }
  78
  79 }  // namespace aura