зеркало из https://github.com/mozilla/gecko-dev.git
58 строки
1.7 KiB
C++
58 строки
1.7 KiB
C++
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/* -*- Mode: C++; tab-width: 4; 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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// This class implements a tree header that can operate in one of three states, in
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// the following order:
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//
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// - no sort (natural order)
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// - sort forwards
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// - sort backwards
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//
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// When it reaches the end, it cycles back to the start (no sort).
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#include "CTriStateTableHeader.h"
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CTriStateTableHeader::CTriStateTableHeader ( LStream* inStream )
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: LTableViewHeader(inStream)
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{
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}
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CTriStateTableHeader :: ~CTriStateTableHeader ( )
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{
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}
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//
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// CycleSortDirection
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//
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// Called when the user clicks (not drags) in a column header.
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//
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bool
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CTriStateTableHeader :: CycleSortDirection ( ColumnIndexT & ioColumn )
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{
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if ( ioColumn == mSortedColumn ) {
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if ( mSortedBackwards ) {
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ioColumn = LArray::index_Bad;
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mSortedBackwards = true; // so inversion below will set it to false
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}
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return !mSortedBackwards;
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}
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// a new column was clicked, just return current sort direction
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return mSortedBackwards;
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} // CycleSortDirection
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