1 // Copyright (c) 2013 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 #ifndef UI_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_ 6 #define UI_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_ 7 8 #include "ui/base/models/simple_menu_model.h" 9 #include "ui/gfx/point.h" 10 #include "ui/gfx/rect.h" 11 12 namespace ui { 13 14 // An interface implemented by widget that has text that can be selected/edited 15 // using touch. 16 class UI_BASE_EXPORT TouchEditable : public ui::SimpleMenuModel::Delegate { 17 public: 18 // TODO(mohsen): Consider switching from local coordinates to screen 19 // coordinates in this interface and see if it will simplify things. 20 21 // Select everything between start and end (points are in view's local 22 // coordinate system). |start| is the logical start and |end| is the logical 23 // end of selection. Visually, |start| may lie after |end|. 24 virtual void SelectRect(const gfx::Point& start, const gfx::Point& end) = 0; 25 26 // Move the caret to |point|. |point| is in local coordinates. 27 virtual void MoveCaretTo(const gfx::Point& point) = 0; 28 29 // Gets the end points of the current selection. The end points p1 and p2 must 30 // be the cursor rect for the start and end of selection (in local 31 // coordinates): 32 // ____________________________________ 33 // | textfield with |selected text| | 34 // ------------------------------------ 35 // ^p1 ^p2 36 // 37 // p1 should be the logical start and p2 the logical end of selection. Hence, 38 // visually, p1 could be to the right of p2 in the figure above. 39 virtual void GetSelectionEndPoints(gfx::Rect* p1, gfx::Rect* p2) = 0; 40 41 // Gets the bounds of the client view in its local coordinates. 42 virtual gfx::Rect GetBounds() = 0; 43 44 // Gets the NativeView hosting the client. 45 virtual gfx::NativeView GetNativeView() const = 0; 46 47 // Converts a point to/from screen coordinates from/to client view. 48 virtual void ConvertPointToScreen(gfx::Point* point) = 0; 49 virtual void ConvertPointFromScreen(gfx::Point* point) = 0; 50 51 // Returns true if the editable draws its own handles (hence, the 52 // TouchSelectionController need not draw handles). 53 virtual bool DrawsHandles() = 0; 54 55 // Tells the editable to open context menu. 56 virtual void OpenContextMenu(const gfx::Point& anchor) = 0; 57 58 // Tells the editable to end touch editing and destroy touch selection 59 // controller it owns. 60 virtual void DestroyTouchSelection() = 0; 61 62 protected: 63 virtual ~TouchEditable() {} 64 }; 65 66 // This defines the callback interface for other code to be notified of changes 67 // in the state of a TouchEditable. 68 class UI_BASE_EXPORT TouchSelectionController { 69 public: 70 virtual ~TouchSelectionController() {} 71 72 // Creates a TouchSelectionController. Caller owns the returned object. 73 static TouchSelectionController* create( 74 TouchEditable* client_view); 75 76 // Notifies the controller that the selection has changed. 77 virtual void SelectionChanged() = 0; 78 79 // Returns true if the user is currently dragging one of the handles. 80 virtual bool IsHandleDragInProgress() = 0; 81 82 // Hides visible handles. According to the value of |quick|, handles might 83 // fade out quickly or slowly. 84 virtual void HideHandles(bool quick) = 0; 85 }; 86 87 class UI_BASE_EXPORT TouchSelectionControllerFactory { 88 public: 89 static void SetInstance(TouchSelectionControllerFactory* instance); 90 91 virtual TouchSelectionController* create(TouchEditable* client_view) = 0; 92 93 protected: 94 virtual ~TouchSelectionControllerFactory() {} 95 }; 96 97 } // namespace views 98 99 #endif // UI_BASE_TOUCH_TOUCH_EDITING_CONTROLLER_H_ 100
