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59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
/* -*- 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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//
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// Mike Pinkerton, Netscape Communications
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//
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// Subclass of LActiveScroller to handle resizing the vertical scrollbar
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// when the column headers appear or disappear.
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//
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#include "CNavCenterScroller.h"
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#include <LScrollBar.h>
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CNavCenterScroller :: CNavCenterScroller ( LStream* inStream )
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: LScrollerView(inStream)
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{
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}
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//
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// ColumnHeadersChangedVisibility
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//
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// Adjust the vertical scrollbar when the column headers appear or disappear.
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// If they are being hidden (probably the most common case since they appear by default
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// in the PPob), move the top of the scrollbar up and stretch it by the size of the
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// column headers. The only tricky part is that we move and resize by opposingly signed
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// amounts.
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//
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void
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CNavCenterScroller :: ColumnHeadersChangedVisibility ( bool inNowVisible, Uint16 inHeaderHeight )
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{
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Int16 delta = inNowVisible ? inHeaderHeight : -inHeaderHeight;
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mVerticalBar->MoveBy ( 0, delta, false );
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mVerticalBar->ResizeFrameBy ( 0, -delta, true );
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// why do we need to refresh the scrollbar? if we mode-switch on the fly while the
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// window is open (which we probably won't ever do...BUT), the scrollbar is the only
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// part that doesn't get redrawn by the coordinator. As a result, we need to make sure
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// it is done here. If the window is not visible, PowerPlant is smart enough not to
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// redraw it, so we don't get any overhead in the normal case. Wow, 11 lines of comments
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// for 3 lines of obivous code. You gotta love that!
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} // ColumnHeadesrChangedVisibility
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