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// Copyright (c) 2006-2008 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 CHROME_BROWSER_VIEWS_BOOKMARK_FOLDER_TREE_VIEW_H_
#define CHROME_BROWSER_VIEWS_BOOKMARK_FOLDER_TREE_VIEW_H_
#include "chrome/browser/bookmarks/bookmark_drag_data.h"
#include "chrome/browser/bookmarks/bookmark_folder_tree_model.h"
#include "chrome/views/tree_view.h"
class BookmarkModel;
class BookmarkNode;
class OSExchangeData;
class Profile;
// BookmarkFolderTreeView is used to show the contents of a
// BookmarkFolderTreeModel and provides drag and drop support.
class BookmarkFolderTreeView : public views::TreeView {
public:
BookmarkFolderTreeView(Profile* profile, BookmarkFolderTreeModel* model);
// Drag and drop methods.
virtual bool CanDrop(const OSExchangeData& data);
virtual void OnDragEntered(const views::DropTargetEvent& event);
virtual int OnDragUpdated(const views::DropTargetEvent& event);
virtual void OnDragExited();
virtual int OnPerformDrop(const views::DropTargetEvent& event);
// Returns the selected node as a BookmarkNode. This returns NULL if the
// selected node is not of type BookmarkFolderTreeModel::BOOKMARK or
// nothing is selected.
BookmarkNode* GetSelectedBookmarkNode();
protected:
// Overriden to start a drag.
virtual LRESULT OnNotify(int w_param, LPNMHDR l_param);
private:
// Provides information used during a drop.
struct DropInfo {
DropInfo()
: drop_parent(NULL),
only_folders(true),
drop_index(-1),
drop_operation(0),
drop_on(false) {}
// Parent the mouse is over.
FolderNode* drop_parent;
// Drag data.
BookmarkDragData drag_data;
// Does drag_data consists of folders only.
bool only_folders;
// If drop_on is false, this is the index to add the child.
// WARNING: this index is in terms of the BookmarkFolderTreeModel, which is
// not the same as the BookmarkModel.
int drop_index;
// Operation for the drop.
int drop_operation;
// Is the user dropping on drop_parent? If false, the mouse is positioned
// such that the drop should insert the data at position drop_index in
// drop_parent.
bool drop_on;
};
// Starts a drag operation for the specified node.
void BeginDrag(BookmarkNode* node);
// Calculates the drop parent. Returns NULL if not over a valid drop
// location. See DropInfos documentation for a description of |drop_index|
// and |drop_on|.
FolderNode* CalculateDropParent(int y,
bool only_folders,
int* drop_index,
bool* drop_on);
// Determines the appropriate drop operation. This returns DRAG_NONE
// if the location is not valid.
int CalculateDropOperation(const views::DropTargetEvent& event,
FolderNode* drop_parent,
int drop_index,
bool drop_on);
// Performs the drop operation.
void OnPerformDropImpl();
// Sets the parent of the drop operation.
void SetDropParent(FolderNode* node, int drop_index, bool drop_on);
// Returns the model as a BookmarkFolderTreeModel.
BookmarkFolderTreeModel* folder_model() const;
// Converts FolderNode into a BookmarkNode.
BookmarkNode* TreeNodeAsBookmarkNode(FolderNode* node);
// Converts an index in terms of the BookmarkFolderTreeModel to an index
// in terms of the BookmarkModel.
int FolderIndexToBookmarkIndex(FolderNode* node, int index, bool drop_on);
Profile* profile_;
// Non-null during a drop.
scoped_ptr<DropInfo> drop_info_;
// Did we originate the drag?
bool is_dragging_;
DISALLOW_COPY_AND_ASSIGN(BookmarkFolderTreeView);
};
#endif // CHROME_BROWSER_VIEWS_BOOKMARK_FOLDER_TREE_VIEW_H_
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