| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/views/view_targeter.h" |
| |
| #include "ui/events/event_target.h" |
| #include "ui/views/focus/focus_manager.h" |
| #include "ui/views/view.h" |
| #include "ui/views/view_targeter_delegate.h" |
| |
| namespace views { |
| |
| ViewTargeter::ViewTargeter(ViewTargeterDelegate* delegate) |
| : delegate_(delegate) { |
| DCHECK(delegate_); |
| } |
| |
| ViewTargeter::~ViewTargeter() {} |
| |
| bool ViewTargeter::DoesIntersectRect(const View* target, |
| const gfx::Rect& rect) const { |
| return delegate_->DoesIntersectRect(target, rect); |
| } |
| |
| View* ViewTargeter::TargetForRect(View* root, const gfx::Rect& rect) const { |
| return delegate_->TargetForRect(root, rect); |
| } |
| |
| ui::EventTarget* ViewTargeter::FindTargetForEvent(ui::EventTarget* root, |
| ui::Event* event) { |
| View* view = static_cast<View*>(root); |
| |
| if (event->IsKeyEvent()) |
| return FindTargetForKeyEvent(view, *static_cast<ui::KeyEvent*>(event)); |
| |
| if (event->IsScrollEvent()) { |
| return FindTargetForScrollEvent(view, |
| *static_cast<ui::ScrollEvent*>(event)); |
| } |
| |
| if (event->IsGestureEvent()) { |
| ui::GestureEvent* gesture = event->AsGestureEvent(); |
| View* gesture_target = FindTargetForGestureEvent(view, *gesture); |
| root->ConvertEventToTarget(gesture_target, gesture); |
| return gesture_target; |
| } |
| |
| NOTREACHED() << "ViewTargeter does not yet support this event type."; |
| return NULL; |
| } |
| |
| ui::EventTarget* ViewTargeter::FindNextBestTarget( |
| ui::EventTarget* previous_target, |
| ui::Event* event) { |
| if (!previous_target) |
| return NULL; |
| |
| if (event->IsGestureEvent()) { |
| ui::GestureEvent* gesture = event->AsGestureEvent(); |
| ui::EventTarget* next_target = |
| FindNextBestTargetForGestureEvent(previous_target, *gesture); |
| previous_target->ConvertEventToTarget(next_target, gesture); |
| return next_target; |
| } |
| |
| return previous_target->GetParentTarget(); |
| } |
| |
| View* ViewTargeter::FindTargetForKeyEvent(View* root, const ui::KeyEvent& key) { |
| if (root->GetFocusManager()) |
| return root->GetFocusManager()->GetFocusedView(); |
| return NULL; |
| } |
| |
| View* ViewTargeter::FindTargetForScrollEvent(View* root, |
| const ui::ScrollEvent& scroll) { |
| gfx::Rect rect(scroll.location(), gfx::Size(1, 1)); |
| return root->GetEffectiveViewTargeter()->TargetForRect(root, rect); |
| } |
| |
| View* ViewTargeter::FindTargetForGestureEvent(View* root, |
| const ui::GestureEvent& gesture) { |
| // TODO(tdanderson): The only code path that performs targeting for gestures |
| // uses the ViewTargeter installed on the RootView (i.e., |
| // a RootViewTargeter). Provide a default implementation |
| // here if we need to be able to perform gesture targeting |
| // starting at an arbitrary node in a Views tree. |
| NOTREACHED(); |
| return NULL; |
| } |
| |
| ui::EventTarget* ViewTargeter::FindNextBestTargetForGestureEvent( |
| ui::EventTarget* previous_target, |
| const ui::GestureEvent& gesture) { |
| NOTREACHED(); |
| return NULL; |
| } |
| |
| } // namespace views |