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// Copyright 2013 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_COCOA_APPS_COLLECTION_VIEW_DRAG_MANAGER_H_
#define UI_APP_LIST_COCOA_APPS_COLLECTION_VIEW_DRAG_MANAGER_H_
#import <Cocoa/Cocoa.h>
#include "base/mac/scoped_nsobject.h"
#include "ui/app_list/app_list_export.h"
@class AppsGridController;
@class ItemDragController;
// Manager for the state associated with dragging an NSCollectionViewItem in the
// AppsGridController. It is also a factory for the NSCollectionView pages in
// the grid, allowing items to be dragged between pages.
APP_LIST_EXPORT
@interface AppsCollectionViewDragManager : NSObject {
@private
base::scoped_nsobject<ItemDragController> itemDragController_;
AppsGridController* gridController_; // Weak. Owns us.
NSSize cellSize_;
size_t rows_;
size_t columns_;
// Index of the last known position of the item currently being dragged.
size_t itemDragIndex_;
// Model index of the item being dragged, or NSNotFound if nothing was hit on
// the last mouseDown.
size_t itemHitIndex_;
// Location in the window of the last mouseDown event.
NSPoint mouseDownLocation_;
// Whether the current mouse action has converted into an item drag.
BOOL dragging_;
}
- (id)initWithCellSize:(NSSize)cellSize
rows:(size_t)rows
columns:(size_t)columns
gridController:(AppsGridController*)gridController;
// Make an empty NSCollectionView with draggable items in the given |pageFrame|.
- (NSCollectionView*)makePageWithFrame:(NSRect)pageFrame;
- (void)cancelDrag;
@end
@interface AppsCollectionViewDragManager (TestingAPI)
- (void)onMouseDownInPage:(NSCollectionView*)page
withEvent:(NSEvent*)theEvent;
- (void)onMouseDragged:(NSEvent*)theEvent;
- (void)onMouseUp:(NSEvent*)theEvent;
@end
#endif // UI_APP_LIST_COCOA_APPS_COLLECTION_VIEW_DRAG_MANAGER_H_
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