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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef UI_VIEWS_VIEW_TARGETER_H_ | 5 #ifndef UI_VIEWS_VIEW_TARGETER_H_ |
| 6 #define UI_VIEWS_VIEW_TARGETER_H_ | 6 #define UI_VIEWS_VIEW_TARGETER_H_ |
| 7 | 7 |
| 8 #include "base/macros.h" |
| 8 #include "ui/events/event_targeter.h" | 9 #include "ui/events/event_targeter.h" |
| 9 #include "ui/views/views_export.h" | 10 #include "ui/views/views_export.h" |
| 10 | 11 |
| 12 namespace gfx { |
| 13 class Rect; |
| 14 } // namespace gfx |
| 15 |
| 16 namespace ui { |
| 17 class GestureEvent; |
| 18 class KeyEvent; |
| 19 class ScrollEvent; |
| 20 } // namespace ui |
| 21 |
| 11 namespace views { | 22 namespace views { |
| 12 | 23 |
| 13 namespace internal { | 24 namespace internal { |
| 14 class RootView; | 25 class RootView; |
| 15 } // namespace internal | 26 } // namespace internal |
| 16 | 27 |
| 17 class View; | 28 class View; |
| 18 class ViewTargeterDelegate; | 29 class ViewTargeterDelegate; |
| 19 | 30 |
| 20 // A ViewTargeter is installed on a View that wishes to use the custom | 31 // A ViewTargeter is installed on a View that wishes to use the custom |
| 21 // hit-testing or event-targeting behaviour defined by |delegate|. | 32 // hit-testing or event-targeting behaviour defined by |delegate|. |
| 22 class VIEWS_EXPORT ViewTargeter : public ui::EventTargeter { | 33 class VIEWS_EXPORT ViewTargeter : public ui::EventTargeter { |
| 23 public: | 34 public: |
| 24 explicit ViewTargeter(ViewTargeterDelegate* delegate); | 35 explicit ViewTargeter(ViewTargeterDelegate* delegate); |
| 25 ~ViewTargeter() override; | 36 ~ViewTargeter() override; |
| 26 | 37 |
| 27 // A call-through to DoesIntersectRect() on |delegate_|. | 38 // A call-through to DoesIntersectRect() on |delegate_|. |
| 28 bool DoesIntersectRect(const View* target, const gfx::Rect& rect) const; | 39 bool DoesIntersectRect(const View* target, const gfx::Rect& rect) const; |
| 29 | 40 |
| 30 // A call-through to TargetForRect() on |delegate_|. | 41 // A call-through to TargetForRect() on |delegate_|. |
| 31 View* TargetForRect(View* root, const gfx::Rect& rect) const; | 42 View* TargetForRect(View* root, const gfx::Rect& rect) const; |
| 32 | 43 |
| 33 protected: | 44 protected: |
| 34 // ui::EventTargeter: | 45 // ui::EventTargeter: |
| 35 ui::EventTarget* FindTargetForEvent(ui::EventTarget* root, | 46 ui::EventTarget* FindTargetForEvent(ui::EventTarget* root, |
| 36 ui::Event* event) override; | 47 ui::Event* event) override; |
| 37 ui::EventTarget* FindNextBestTarget(ui::EventTarget* previous_target, | 48 ui::EventTarget* FindNextBestTarget(ui::EventTarget* previous_target, |
| 38 ui::Event* event) override; | 49 ui::Event* event) override; |
| 39 bool SubtreeCanAcceptEvent(ui::EventTarget* target, | |
| 40 const ui::LocatedEvent& event) const override; | |
| 41 bool EventLocationInsideBounds(ui::EventTarget* target, | |
| 42 const ui::LocatedEvent& event) const override; | |
| 43 | 50 |
| 44 private: | 51 private: |
| 45 View* FindTargetForKeyEvent(View* root, const ui::KeyEvent& key); | 52 View* FindTargetForKeyEvent(View* root, const ui::KeyEvent& key); |
| 46 View* FindTargetForScrollEvent(View* root, const ui::ScrollEvent& scroll); | 53 View* FindTargetForScrollEvent(View* root, const ui::ScrollEvent& scroll); |
| 47 | 54 |
| 48 virtual View* FindTargetForGestureEvent(View* root, | 55 virtual View* FindTargetForGestureEvent(View* root, |
| 49 const ui::GestureEvent& gesture); | 56 const ui::GestureEvent& gesture); |
| 50 virtual ui::EventTarget* FindNextBestTargetForGestureEvent( | 57 virtual ui::EventTarget* FindNextBestTargetForGestureEvent( |
| 51 ui::EventTarget* previous_target, | 58 ui::EventTarget* previous_target, |
| 52 const ui::GestureEvent& gesture); | 59 const ui::GestureEvent& gesture); |
| 53 | 60 |
| 54 // ViewTargeter does not own the |delegate_|, but |delegate_| must | 61 // ViewTargeter does not own the |delegate_|, but |delegate_| must |
| 55 // outlive the targeter. | 62 // outlive the targeter. |
| 56 ViewTargeterDelegate* delegate_; | 63 ViewTargeterDelegate* delegate_; |
| 57 | 64 |
| 58 DISALLOW_COPY_AND_ASSIGN(ViewTargeter); | 65 DISALLOW_COPY_AND_ASSIGN(ViewTargeter); |
| 59 }; | 66 }; |
| 60 | 67 |
| 61 } // namespace views | 68 } // namespace views |
| 62 | 69 |
| 63 #endif // UI_VIEWS_VIEW_TARGETER_H_ | 70 #endif // UI_VIEWS_VIEW_TARGETER_H_ |
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