ui/app_list/cocoa/apps_collection_view_drag_manager.h

   1 // Copyright 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_APP_LIST_COCOA_APPS_COLLECTION_VIEW_DRAG_MANAGER_H_
   6 #define UI_APP_LIST_COCOA_APPS_COLLECTION_VIEW_DRAG_MANAGER_H_
   7
   8 #import <Cocoa/Cocoa.h>
   9
  10 #include "base/mac/scoped_nsobject.h"
  11 #include "ui/app_list/app_list_export.h"
  12
  13 @class AppsGridController;
  14 @class ItemDragController;
  15
  16 // Manager for the state associated with dragging an NSCollectionViewItem in the
  17 // AppsGridController. It is also a factory for the NSCollectionView pages in
  18 // the grid, allowing items to be dragged between pages.
  19 APP_LIST_EXPORT
  20 @interface AppsCollectionViewDragManager : NSObject {
  21  @private
  22   base::scoped_nsobject<ItemDragController> itemDragController_;
  23   AppsGridController* gridController_;  // Weak. Owns us.
  24
  25   NSSize cellSize_;
  26   size_t rows_;
  27   size_t columns_;
  28
  29   // Index of the last known position of the item currently being dragged.
  30   size_t itemDragIndex_;
  31
  32   // Model index of the item being dragged, or NSNotFound if nothing was hit on
  33   // the last mouseDown.
  34   size_t itemHitIndex_;
  35
  36   // Location in the window of the last mouseDown event.
  37   NSPoint mouseDownLocation_;
  38
  39   // Whether the current mouse action has converted into an item drag.
  40   BOOL dragging_;
  41 }
  42
  43 - (id)initWithCellSize:(NSSize)cellSize
  44                   rows:(size_t)rows
  45                columns:(size_t)columns
  46         gridController:(AppsGridController*)gridController;
  47
  48 // Make an empty NSCollectionView with draggable items in the given |pageFrame|.
  49 - (NSCollectionView*)makePageWithFrame:(NSRect)pageFrame;
  50
  51 - (void)cancelDrag;
  52
  53 @end
  54
  55 @interface AppsCollectionViewDragManager (TestingAPI)
  56
  57 - (void)onMouseDownInPage:(NSCollectionView*)page
  58                 withEvent:(NSEvent*)theEvent;
  59 - (void)onMouseDragged:(NSEvent*)theEvent;
  60 - (void)onMouseUp:(NSEvent*)theEvent;
  61
  62 @end
  63
  64 #endif  // UI_APP_LIST_COCOA_APPS_COLLECTION_VIEW_DRAG_MANAGER_H_