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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 "ui/events/event_targeter.h" | 8 #include "ui/events/event_targeter.h" |
| 9 #include "ui/views/views_export.h" | 9 #include "ui/views/views_export.h" |
| 10 | 10 |
| 11 namespace views { | 11 namespace views { |
| 12 | 12 |
| 13 class View; | 13 class View; |
| 14 class ViewTargeterDelegate; | 14 class ViewTargeterDelegate; |
| 15 | 15 |
| 16 // Contains the logic used to determine the View to which an | 16 // Contains the logic used to determine the View to which an |
| 17 // event should be dispatched. A ViewTargeter (or one of its | 17 // event should be dispatched. A ViewTargeter (or one of its |
| 18 // derived classes) is installed on a View to specify the | 18 // derived classes) is installed on a View to specify the |
| 19 // targeting behaviour to be used for the subtree rooted at | 19 // targeting behaviour to be used for the subtree rooted at |
| 20 // that View. | 20 // that View. |
| 21 // TODO(tdanderson): Remove overrides of all EventHandler methods except for |
| 22 // FindTargetForEvent() and FindNextBestTarget(). |
| 21 class VIEWS_EXPORT ViewTargeter : public ui::EventTargeter { | 23 class VIEWS_EXPORT ViewTargeter : public ui::EventTargeter { |
| 22 public: | 24 public: |
| 23 explicit ViewTargeter(ViewTargeterDelegate* delegate); | 25 explicit ViewTargeter(ViewTargeterDelegate* delegate); |
| 24 virtual ~ViewTargeter(); | 26 virtual ~ViewTargeter(); |
| 25 | 27 |
| 26 // A call-through to DoesIntersectRect() on |delegate_|. | 28 // A call-through to DoesIntersectRect() on |delegate_|. |
| 27 bool DoesIntersectRect(const View* target, const gfx::Rect& rect) const; | 29 bool DoesIntersectRect(const View* target, const gfx::Rect& rect) const; |
| 28 | 30 |
| 31 // A call-through to TargetForRect() on |delegate_|. |
| 32 View* TargetForRect(View* root, const gfx::Rect& rect) const; |
| 33 |
| 29 protected: | 34 protected: |
| 30 // Returns the location of |event| represented as a rect. If |event| is | 35 // Returns the location of |event| represented as a rect. If |event| is |
| 31 // a gesture event, its bounding box is returned. Otherwise, a 1x1 rect | 36 // a gesture event, its bounding box is returned. Otherwise, a 1x1 rect |
| 32 // having its origin at the location of |event| is returned. | 37 // having its origin at the location of |event| is returned. |
| 33 gfx::RectF BoundsForEvent(const ui::LocatedEvent& event) const; | 38 gfx::RectF BoundsForEvent(const ui::LocatedEvent& event) const; |
| 34 | 39 |
| 35 // ui::EventTargeter: | 40 // ui::EventTargeter: |
| 36 virtual ui::EventTarget* FindTargetForEvent(ui::EventTarget* root, | 41 virtual ui::EventTarget* FindTargetForEvent(ui::EventTarget* root, |
| 37 ui::Event* event) OVERRIDE; | 42 ui::Event* event) OVERRIDE; |
| 38 virtual ui::EventTarget* FindNextBestTarget(ui::EventTarget* previous_target, | 43 virtual ui::EventTarget* FindNextBestTarget(ui::EventTarget* previous_target, |
| (...skipping 11 matching lines...) Expand all Loading... |
| 50 // ViewTargeter does not own the |delegate_|, but |delegate_| must | 55 // ViewTargeter does not own the |delegate_|, but |delegate_| must |
| 51 // outlive the targeter. | 56 // outlive the targeter. |
| 52 ViewTargeterDelegate* delegate_; | 57 ViewTargeterDelegate* delegate_; |
| 53 | 58 |
| 54 DISALLOW_COPY_AND_ASSIGN(ViewTargeter); | 59 DISALLOW_COPY_AND_ASSIGN(ViewTargeter); |
| 55 }; | 60 }; |
| 56 | 61 |
| 57 } // namespace views | 62 } // namespace views |
| 58 | 63 |
| 59 #endif // UI_VIEWS_VIEW_TARGETER_H_ | 64 #endif // UI_VIEWS_VIEW_TARGETER_H_ |
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