views: Move the remaining files to ui/views/controls/.

views/controls/scroll_view.h

-// 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 VIEWS_CONTROLS_SCROLL_VIEW_H_
-#define VIEWS_CONTROLS_SCROLL_VIEW_H_
-#pragma once
-
-#include <string>
-
-#include "base/compiler_specific.h"
-#include "ui/views/controls/scrollbar/scroll_bar.h"
-
-namespace views {
-
-/////////////////////////////////////////////////////////////////////////////
-//
-// ScrollView class
-//
-// A ScrollView is used to make any View scrollable. The view is added to
-// a viewport which takes care of clipping.
-//
-// In this current implementation both horizontal and vertical scrollbars are
-// added as needed.
-//
-// The scrollview supports keyboard UI and mousewheel.
-//
-/////////////////////////////////////////////////////////////////////////////
-
-class VIEWS_EXPORT ScrollView : public View, public ScrollBarController {
- public:
-  static const char* const kViewClassName;
-
-  ScrollView();
-  // Initialize with specific views. resize_corner is optional.
-  ScrollView(ScrollBar* horizontal_scrollbar,
-             ScrollBar* vertical_scrollbar,
-             View* resize_corner);
-  virtual ~ScrollView();
-
-  // Set the contents. Any previous contents will be deleted. The contents
-  // is the view that needs to scroll.
-  void SetContents(View* a_view);
-  View* GetContents() const;
-
-  // Overridden to layout the viewport and scrollbars.
-  virtual void Layout() OVERRIDE;
-
-  // Returns the visible region of the content View.
-  gfx::Rect GetVisibleRect() const;
-
-  // Scrolls the minimum amount necessary to make the specified rectangle
-  // visible, in the coordinates of the contents view. The specified rectangle
-  // is constrained by the bounds of the contents view. This has no effect if
-  // the contents have not been set.
-  //
-  // Client code should use ScrollRectToVisible, which invokes this
-  // appropriately.
-  void ScrollContentsRegionToBeVisible(const gfx::Rect& rect);
-
-  // ScrollBarController.
-  // NOTE: this is intended to be invoked by the ScrollBar, and NOT general
-  // client code.
-  // See also ScrollRectToVisible.
-  virtual void ScrollToPosition(ScrollBar* source, int position) OVERRIDE;
-
-  // Returns the amount to scroll relative to the visible bounds. This invokes
-  // either GetPageScrollIncrement or GetLineScrollIncrement to determine the
-  // amount to scroll. If the view returns 0 (or a negative value) a default
-  // value is used.
-  virtual int GetScrollIncrement(ScrollBar* source,
-                                 bool is_page,
-                                 bool is_positive) OVERRIDE;
-
-  // Keyboard events
-  virtual bool OnKeyPressed(const KeyEvent& event) OVERRIDE;
-  virtual bool OnMouseWheel(const MouseWheelEvent& e) OVERRIDE;
-
-  virtual std::string GetClassName() const OVERRIDE;
-
-  // Retrieves the vertical scrollbar width.
-  int GetScrollBarWidth() const;
-
-  // Retrieves the horizontal scrollbar height.
-  int GetScrollBarHeight() const;
-
-  // Computes the visibility of both scrollbars, taking in account the view port
-  // and content sizes.
-  void ComputeScrollBarsVisibility(const gfx::Size& viewport_size,
-                                   const gfx::Size& content_size,
-                                   bool* horiz_is_shown,
-                                   bool* vert_is_shown) const;
-
-  ScrollBar* horizontal_scroll_bar() const { return horiz_sb_; }
-
-  ScrollBar* vertical_scroll_bar() const { return vert_sb_; }
-
- private:
-  // Initialize the ScrollView. resize_corner is optional.
-  void Init(ScrollBar* horizontal_scrollbar,
-            ScrollBar* vertical_scrollbar,
-            View* resize_corner);
-
-  // Shows or hides the scrollbar/resize_corner based on the value of
-  // |should_show|.
-  void SetControlVisibility(View* control, bool should_show);
-
-  // Update the scrollbars positions given viewport and content sizes.
-  void UpdateScrollBarPositions();
-
-  // Make sure the content is not scrolled out of bounds
-  void CheckScrollBounds();
-
-  // Make sure the content is not scrolled out of bounds in one dimension
-  int CheckScrollBounds(int viewport_size, int content_size, int current_pos);
-
-  // The clipping viewport. Content is added to that view.
-  View* viewport_;
-
-  // The current contents
-  View* contents_;
-
-  // Horizontal scrollbar.
-  ScrollBar* horiz_sb_;
-
-  // Vertical scrollbar.
-  ScrollBar* vert_sb_;
-
-  // Resize corner.
-  View* resize_corner_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScrollView);
-};
-
-// VariableRowHeightScrollHelper is intended for views that contain rows of
-// varying height. To use a VariableRowHeightScrollHelper create one supplying
-// a Controller and delegate GetPageScrollIncrement and GetLineScrollIncrement
-// to the helper. VariableRowHeightScrollHelper calls back to the
-// Controller to determine row boundaries.
-class VariableRowHeightScrollHelper {
- public:
-  // The origin and height of a row.
-  struct RowInfo {
-    RowInfo(int origin, int height) : origin(origin), height(height) {}
-
-    // Origin of the row.
-    int origin;
-
-    // Height of the row.
-    int height;
-  };
-
-  // Used to determine row boundaries.
-  class Controller {
-   public:
-    // Returns the origin and size of the row at the specified location.
-    virtual VariableRowHeightScrollHelper::RowInfo GetRowInfo(int y) = 0;
-  };
-
-  // Creates a new VariableRowHeightScrollHelper. Controller is
-  // NOT deleted by this VariableRowHeightScrollHelper.
-  explicit VariableRowHeightScrollHelper(Controller* controller);
-  virtual ~VariableRowHeightScrollHelper();
-
-  // Delegate the View methods of the same name to these. The scroll amount is
-  // determined by querying the Controller for the appropriate row to scroll
-  // to.
-  int GetPageScrollIncrement(ScrollView* scroll_view,
-                             bool is_horizontal, bool is_positive);
-  int GetLineScrollIncrement(ScrollView* scroll_view,
-                             bool is_horizontal, bool is_positive);
-
- protected:
-  // Returns the row information for the row at the specified location. This
-  // calls through to the method of the same name on the controller.
-  virtual RowInfo GetRowInfo(int y);
-
- private:
-  Controller* controller_;
-
-  DISALLOW_COPY_AND_ASSIGN(VariableRowHeightScrollHelper);
-};
-
-// FixedRowHeightScrollHelper is intended for views that contain fixed height
-// height rows. To use a FixedRowHeightScrollHelper delegate
-// GetPageScrollIncrement and GetLineScrollIncrement to it.
-class FixedRowHeightScrollHelper : public VariableRowHeightScrollHelper {
- public:
-  // Creates a FixedRowHeightScrollHelper. top_margin gives the distance from
-  // the top of the view to the first row, and may be 0. row_height gives the
-  // height of each row.
-  FixedRowHeightScrollHelper(int top_margin, int row_height);
-
- protected:
-  // Calculates the bounds of the row from the top margin and row height.
-  virtual RowInfo GetRowInfo(int y) OVERRIDE;
-
- private:
-  int top_margin_;
-  int row_height_;
-
-  DISALLOW_COPY_AND_ASSIGN(FixedRowHeightScrollHelper);
-};
-
-}  // namespace views
-
-#endif  // VIEWS_CONTROLS_SCROLL_VIEW_H_