| // Copyright (c) 2011 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. |
| |
| #ifndef UI_VIEWS_CONTROLS_RESIZE_AREA_H_ |
| #define UI_VIEWS_CONTROLS_RESIZE_AREA_H_ |
| |
| #include <string> |
| |
| #include "base/macros.h" |
| #include "ui/views/view.h" |
| |
| namespace views { |
| |
| class ResizeAreaDelegate; |
| |
| // An invisible area that acts like a horizontal resizer. |
| class VIEWS_EXPORT ResizeArea : public View { |
| public: |
| static const char kViewClassName[]; |
| |
| explicit ResizeArea(ResizeAreaDelegate* delegate); |
| ~ResizeArea() override; |
| |
| // views::View: |
| const char* GetClassName() const override; |
| gfx::NativeCursor GetCursor(const ui::MouseEvent& event) override; |
| void OnGestureEvent(ui::GestureEvent* event) override; |
| bool OnMousePressed(const ui::MouseEvent& event) override; |
| bool OnMouseDragged(const ui::MouseEvent& event) override; |
| void OnMouseReleased(const ui::MouseEvent& event) override; |
| void OnMouseCaptureLost() override; |
| void GetAccessibleNodeData(ui::AXNodeData* node_data) override; |
| |
| private: |
| // Report the amount the user resized by to the delegate, accounting for |
| // directionality. |
| void ReportResizeAmount(int resize_amount, bool last_update); |
| |
| // Converts |event_x| to screen coordinates and sets |initial_position_| to |
| // this value. |
| void SetInitialPosition(int event_x); |
| |
| // The delegate to notify when we have updates. |
| ResizeAreaDelegate* delegate_; |
| |
| // The event's x-position at the start of the resize operation. The resize |
| // area will move while being dragged, so |initial_position_| is represented |
| // in screen coordinates so that we don't lose our bearings. |
| int initial_position_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ResizeArea); |
| }; |
| |
| } // namespace views |
| |
| #endif // UI_VIEWS_CONTROLS_RESIZE_AREA_H_ |