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nsScrollbarFrame.h
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nsScrollbarFrame.h
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
//
// nsScrollbarFrame
//
#ifndef nsScrollbarFrame_h__
#define nsScrollbarFrame_h__
#include "nsBoxFrame.h"
class nsIScrollbarMediator;
nsIFrame* NS_NewScrollbarFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
class nsScrollbarFrame : public nsBoxFrame
{
public:
nsScrollbarFrame(nsIPresShell* aShell, nsStyleContext* aContext):
nsBoxFrame(aShell, aContext), mScrollbarMediator(nsnull) {}
NS_DECL_QUERYFRAME_TARGET(nsScrollbarFrame)
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsAString& aResult) const {
return MakeFrameName(NS_LITERAL_STRING("ScrollbarFrame"), aResult);
}
#endif
// nsIFrame overrides
NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType);
NS_DECL_QUERYFRAME
NS_DECL_FRAMEARENA_HELPERS
NS_IMETHOD HandlePress(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD HandleMultiplePress(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus,
PRBool aControlHeld);
NS_IMETHOD HandleDrag(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD HandleRelease(nsPresContext* aPresContext,
nsGUIEvent * aEvent,
nsEventStatus* aEventStatus);
NS_IMETHOD Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow);
NS_IMETHOD Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
virtual PRBool IsContainingBlock() const;
virtual nsIAtom* GetType() const;
void SetScrollbarMediatorContent(nsIContent* aMediator);
nsIScrollbarMediator* GetScrollbarMediator();
// nsBox methods
/**
* Treat scrollbars as clipping their children; overflowing children
* will not be allowed to set an overflow rect on this
* frame. This means that when the scroll code decides to hide a
* scrollframe by setting its height or width to zero, that will
* hide the children too.
*/
virtual PRBool DoesClipChildren() { return PR_TRUE; }
private:
nsCOMPtr<nsIContent> mScrollbarMediator;
}; // class nsScrollbarFrame
#endif