39846f5631
selection in the tree view. git-svn-id: svn://10.0.0.236/trunk@16695 18797224-902f-48f8-a5cc-f745e15eee43
94 lines
3.1 KiB
C++
94 lines
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsHierarchicalDataModel_h___
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#define nsHierarchicalDataModel_h___
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#include "nsFont.h"
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#include "nsColor.h"
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class nsHierarchicalDataItem;
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class nsDataModelWidget;
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class nsIContent;
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class nsIImage;
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// Style info helper struct shared by most widgets.
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struct nsBasicStyleInfo
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{
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nsFont font;
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nscolor foregroundColor;
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nscolor backgroundColor;
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nsIImage* pBackgroundImage; //*** com_auto_ptr?
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nsIImage* BackgroundImage ( ) const { return pBackgroundImage; }
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nsBasicStyleInfo(const nsFont& aFont)
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:font(aFont), pBackgroundImage(nsnull) { }
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};
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// -----------------------------------------------------------------
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// An abstract API for communication with a hierarchical store of
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// information. Iteration over children in the model is provided.
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// The model also provides a flattened view of the tree (a list
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// of visible nodes).
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//------------------------------------------------------------
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class nsHierarchicalDataModel
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{
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protected:
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nsHierarchicalDataModel() {}; // Disallow instantiation of abstract class.
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public:
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virtual ~nsHierarchicalDataModel() {};
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// Retrieve the root node of the data model.
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// Setting the Content Root for the tree
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virtual void SetContentRoot(nsIContent* pContent) = 0;
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virtual nsHierarchicalDataItem* GetRoot() const = 0;
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// A visibility hint can be stored and retrieved (e.g., the leftmost or topmost
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// item in the current scrolled view).
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virtual PRUint32 GetFirstVisibleItemIndex() const = 0;
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virtual void SetFirstVisibleItemIndex(PRUint32 index) = 0;
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virtual nsHierarchicalDataItem* GetNthItem(PRUint32 n) const = 0;
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virtual void SetDataModelListener(nsDataModelWidget* pListener) = 0;
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// Selection APIs
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virtual void SetSelection(nsHierarchicalDataItem* pDataItem) = 0;
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// Sets the selection to be only the node passed in. All other nodes are deselected
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// prior to the selection of the new node.
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virtual void ToggleSelection(nsHierarchicalDataItem* pDataItem) = 0;
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// Toggles the selection on the item specified without affecting other selected nodes.
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virtual void RangedSelection(PRUint32 n, PRUint32 count) = 0;
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// Selects the number of items specified by count, starting from position n.
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virtual void ClearSelection() = 0;
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// Deselects all items.
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public:
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void* GetImplData() { return mImplData; }
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void SetImplData(void* pData) { mImplData = pData; }
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protected:
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void* mImplData;
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};
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#endif /* nsHierarchicalDataModel_h___ */
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