1 // Copyright (c) 2011 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 CHROME_BROWSER_UI_TOUCH_TABS_TOUCH_TAB_STRIP_H_ 6 #define CHROME_BROWSER_UI_TOUCH_TABS_TOUCH_TAB_STRIP_H_ 7 #pragma once 8 9 #include "chrome/browser/ui/views/tabs/base_tab_strip.h" 10 11 class TouchTab; 12 13 /////////////////////////////////////////////////////////////////////////////// 14 // 15 // TouchTabStrip 16 // 17 // A View that represents the TabStripModel. The TouchTabStrip has the 18 // following responsibilities: 19 // - It implements the TabStripModelObserver interface, and acts as a 20 // container for Tabs, and is also responsible for creating them. 21 // 22 // TODO(wyck): Use transformable views for scrolling. 23 /////////////////////////////////////////////////////////////////////////////// 24 class TouchTabStrip : public BaseTabStrip { 25 public: 26 explicit TouchTabStrip(TabStripController* controller); 27 virtual ~TouchTabStrip(); 28 29 // AbstractTabStripView implementation: 30 virtual bool IsPositionInWindowCaption(const gfx::Point& point); 31 virtual void SetBackgroundOffset(const gfx::Point& offset); 32 33 // BaseTabStrip implementation: 34 virtual void PrepareForCloseAt(int model_index); 35 virtual void StartHighlight(int model_index); 36 virtual void StopAllHighlighting(); 37 virtual BaseTab* CreateTabForDragging(); 38 virtual void RemoveTabAt(int model_index); 39 virtual void SelectTabAt(int old_model_index, int new_model_index); 40 virtual void TabTitleChangedNotLoading(int model_index); 41 virtual BaseTab* CreateTab(); 42 virtual void StartInsertTabAnimation(int model_index); 43 virtual void AnimateToIdealBounds(); 44 virtual bool ShouldHighlightCloseButtonAfterRemove(); 45 virtual void GenerateIdealBounds(); 46 virtual void LayoutDraggedTabsAt(const std::vector<BaseTab*>& tabs, 47 BaseTab* active_tab, 48 const gfx::Point& location, 49 bool initial_drag); 50 virtual void CalculateBoundsForDraggedTabs( 51 const std::vector<BaseTab*>& tabs, 52 std::vector<gfx::Rect>* bounds); 53 virtual int GetSizeNeededForTabs(const std::vector<BaseTab*>& tabs); 54 55 // views::View overrides: 56 virtual bool OnMousePressed(const views::MouseEvent& event) OVERRIDE; 57 virtual bool OnMouseDragged(const views::MouseEvent& event) OVERRIDE; 58 virtual void OnMouseReleased(const views::MouseEvent& event) OVERRIDE; 59 virtual void OnMouseCaptureLost() OVERRIDE; 60 61 // Retrieves the Tab at the specified index. Remember, the specified index 62 // is in terms of tab_data, *not* the model. 63 TouchTab* GetTabAtTabDataIndex(int tab_data_index) const; 64 65 private: 66 void Init(); 67 68 // Overridden from views::View. 69 virtual gfx::Size GetPreferredSize() OVERRIDE; 70 virtual void PaintChildren(gfx::Canvas* canvas) OVERRIDE; 71 virtual views::View::TouchStatus OnTouchEvent( 72 const views::TouchEvent& event) OVERRIDE; 73 virtual void ViewHierarchyChanged(bool is_add, 74 View* parent, 75 View* child) OVERRIDE; 76 77 // Adjusts the state of scroll interaction when a mouse press occurs at the 78 // given point. Sets an appropriate |initial_scroll_offset_|. 79 void BeginScroll(const gfx::Point& point); 80 81 // Adjusts the state of scroll interaction when the mouse is dragged to the 82 // given point. If the scroll is not beyond the minimum threshold, the tabs 83 // will not actually scroll. 84 void ContinueScroll(const gfx::Point& point); 85 86 // Adjusts the state of scroll interaction when the mouse is released. Either 87 // scrolls to the final mouse release point or selects the current tab 88 // depending on whether the mouse was dragged beyone the minimum threshold. 89 void EndScroll(const gfx::Point& point); 90 91 // Adjust the state of scroll interaction when the mouse capture is lost. It 92 // scrolls back to the original position before the scroll began. 93 void CancelScroll(); 94 95 // Adjust the positions of the tabs to perform a scroll of |delta_x| relative 96 // to the |initial_scroll_offset_|. 97 void ScrollTo(int delta_x); 98 99 // True if PrepareForCloseAt has been invoked. When true remove animations 100 // preserve current tab bounds. 101 bool in_tab_close_; 102 103 // Last time the tabstrip was tapped. 104 base::Time last_tap_time_; 105 106 // The view that was tapped last. 107 View* last_tapped_view_; 108 109 // Records the mouse x coordinate at the start of a drag operation. 110 int initial_mouse_x_; 111 112 // Records the scroll offset at the time of the start of a drag operation. 113 int initial_scroll_offset_; 114 115 // The current offset of the view. Positive scroll offsets move the icons to 116 // the left. Negative scroll offsets move the icons to the right. 117 int scroll_offset_; 118 119 // State of the scrolling interaction. Will be true once the drag has been 120 // displaced beyond the minimum dragging threshold. 121 bool scrolling_; 122 123 // Records the tab that was under the initial mouse press. Must match the 124 // tab that was under the final mouse release in order for the tab to 125 // be selected. 126 TouchTab* initial_tab_; 127 128 // The minimum value that |scroll_offset_| can have. Based on the total 129 // width of all the content to be scrolled, less the viewport size. 130 int min_scroll_offset_; 131 132 DISALLOW_COPY_AND_ASSIGN(TouchTabStrip); 133 }; 134 135 #endif // CHROME_BROWSER_UI_TOUCH_TABS_TOUCH_TAB_STRIP_H_ 136
