1 // Copyright (c) 2012 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_APP_LIST_VIEWS_PAGE_SWITCHER_H_ 6 #define UI_APP_LIST_VIEWS_PAGE_SWITCHER_H_ 7 8 #include "base/basictypes.h" 9 #include "ui/app_list/pagination_model_observer.h" 10 #include "ui/views/controls/button/button.h" 11 #include "ui/views/view.h" 12 13 namespace app_list { 14 15 class PaginationModel; 16 17 // PageSwitcher represents its underlying PaginationModel with a button strip. 18 // Each page in the PageinationModel has a button in the strip and when the 19 // button is clicked, the corresponding page becomes selected. 20 class PageSwitcher : public views::View, 21 public views::ButtonListener, 22 public PaginationModelObserver { 23 public: 24 explicit PageSwitcher(PaginationModel* model); 25 virtual ~PageSwitcher(); 26 27 // Returns the page index of the page switcher button under the point. If no 28 // page switcher button is under the point, -1 is return. |point| is in 29 // PageSwitcher's coordinates. 30 int GetPageForPoint(const gfx::Point& point) const; 31 32 // Shows hover for button under the point. |point| is in PageSwitcher's 33 // coordinates. 34 void UpdateUIForDragPoint(const gfx::Point& point); 35 36 // Overridden from views::View: 37 virtual gfx::Size GetPreferredSize() const OVERRIDE; 38 virtual void Layout() OVERRIDE; 39 40 private: 41 void CalculateButtonWidthAndSpacing(int contents_width); 42 43 // Overridden from views::ButtonListener: 44 virtual void ButtonPressed(views::Button* sender, 45 const ui::Event& event) OVERRIDE; 46 47 // Overridden from PaginationModelObserver: 48 virtual void TotalPagesChanged() OVERRIDE; 49 virtual void SelectedPageChanged(int old_selected, int new_selected) OVERRIDE; 50 virtual void TransitionStarted() OVERRIDE; 51 virtual void TransitionChanged() OVERRIDE; 52 53 PaginationModel* model_; // Owned by AppsGridView. 54 views::View* buttons_; // Owned by views hierarchy. 55 56 DISALLOW_COPY_AND_ASSIGN(PageSwitcher); 57 }; 58 59 } // namespace app_list 60 61 #endif // UI_APP_LIST_VIEWS_PAGE_SWITCHER_H_ 62