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// Copyright (c) 2012 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_APP_LIST_VIEWS_PAGE_SWITCHER_H_
#define UI_APP_LIST_VIEWS_PAGE_SWITCHER_H_
#include "base/macros.h"
#include "ui/app_list/pagination_model_observer.h"
#include "ui/views/controls/button/button.h"
#include "ui/views/view.h"
namespace app_list {
class PaginationModel;
// PageSwitcher represents its underlying PaginationModel with a button strip.
// Each page in the PageinationModel has a button in the strip and when the
// button is clicked, the corresponding page becomes selected.
class PageSwitcher : public views::View,
public views::ButtonListener,
public PaginationModelObserver {
public:
explicit PageSwitcher(PaginationModel* model);
~PageSwitcher() override;
// Returns the page index of the page switcher button under the point. If no
// page switcher button is under the point, -1 is return. |point| is in
// PageSwitcher's coordinates.
int GetPageForPoint(const gfx::Point& point) const;
// Shows hover for button under the point. |point| is in PageSwitcher's
// coordinates.
void UpdateUIForDragPoint(const gfx::Point& point);
// Overridden from views::View:
gfx::Size GetPreferredSize() const override;
void Layout() override;
private:
void CalculateButtonWidthAndSpacing(int contents_width);
// Overridden from views::ButtonListener:
void ButtonPressed(views::Button* sender, const ui::Event& event) override;
// Overridden from PaginationModelObserver:
void TotalPagesChanged() override;
void SelectedPageChanged(int old_selected, int new_selected) override;
void TransitionStarted() override;
void TransitionChanged() override;
PaginationModel* model_; // Owned by AppsGridView.
views::View* buttons_; // Owned by views hierarchy.
DISALLOW_COPY_AND_ASSIGN(PageSwitcher);
};
} // namespace app_list
#endif // UI_APP_LIST_VIEWS_PAGE_SWITCHER_H_