mirror of
https://github.com/rn10950/RetroZilla.git
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122 lines
4.6 KiB
C++
122 lines
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsScrollPortView_h___
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#define nsScrollPortView_h___
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#include "nsView.h"
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#include "nsIScrollableView.h"
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#include "nsCOMPtr.h"
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#include "nsITimer.h"
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class nsISupportsArray;
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class SmoothScroll;
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//this is a class that acts as a container for other views and provides
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//automatic management of scrolling of the views it contains.
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class nsScrollPortView : public nsView, public nsIScrollableView_MOZILLA_1_8_BRANCH
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{
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public:
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nsScrollPortView(nsViewManager* aViewManager = nsnull);
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virtual nsIScrollableView* ToScrollableView() { return this; }
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NS_IMETHOD QueryInterface(REFNSIID aIID,
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void** aInstancePtr);
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NS_IMETHOD SetWidget(nsIWidget *aWidget);
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//nsIScrollableView interface
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NS_IMETHOD CreateScrollControls(nsNativeWidget aNative = nsnull);
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NS_IMETHOD GetContainerSize(nscoord *aWidth, nscoord *aHeight) const;
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NS_IMETHOD SetScrolledView(nsIView *aScrolledView);
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NS_IMETHOD GetScrolledView(nsIView *&aScrolledView) const;
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NS_IMETHOD GetScrollPosition(nscoord &aX, nscoord &aY) const;
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NS_IMETHOD ScrollTo(nscoord aX, nscoord aY, PRUint32 aUpdateFlags);
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NS_IMETHOD SetScrollProperties(PRUint32 aProperties);
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NS_IMETHOD GetScrollProperties(PRUint32 *aProperties);
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NS_IMETHOD SetLineHeight(nscoord aHeight);
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NS_IMETHOD GetLineHeight(nscoord *aHeight);
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NS_IMETHOD ScrollByLines(PRInt32 aNumLinesX, PRInt32 aNumLinesY);
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NS_IMETHOD GetPageScrollDistances(nsSize *aDistances);
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NS_IMETHOD ScrollByPages(PRInt32 aNumPagesX, PRInt32 aNumPagesY);
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NS_IMETHOD ScrollByWhole(PRBool aTop);
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NS_IMETHOD ScrollByPixels(PRInt32 aNumPixelsX, PRInt32 aNumPixelsY);
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NS_IMETHOD CanScroll(PRBool aHorizontal, PRBool aForward, PRBool &aResult);
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NS_IMETHOD_(nsIView*) View();
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NS_IMETHOD AddScrollPositionListener(nsIScrollPositionListener* aListener);
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NS_IMETHOD RemoveScrollPositionListener(nsIScrollPositionListener* aListener);
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// local to the view module
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NS_IMETHOD Paint(nsIRenderingContext& rc, const nsRect& rect,
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PRUint32 aPaintFlags, PRBool &Result);
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NS_IMETHOD Paint(nsIRenderingContext& aRC, const nsIRegion& aRegion,
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PRUint32 aPaintFlags, PRBool &Result);
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nsView* GetScrolledView() const { return GetFirstChild(); }
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private:
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NS_IMETHOD ScrollToImpl(nscoord aX, nscoord aY, PRUint32 aUpdateFlags);
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// data members
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SmoothScroll* mSmoothScroll;
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// methods
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void IncrementalScroll();
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PRBool IsSmoothScrollingEnabled();
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static void SmoothScrollAnimationCallback(nsITimer *aTimer, void* aESM);
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protected:
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virtual ~nsScrollPortView();
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//private
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void Scroll(nsView *aScrolledView, nsPoint aTwipsDelta, nsPoint aPixDelta, float aT2P);
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PRBool CannotBitBlt(nsView* aScrolledView);
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nscoord mOffsetX, mOffsetY;
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nscoord mOffsetXpx, mOffsetYpx;
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PRUint32 mScrollProperties;
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nscoord mLineHeight;
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nsISupportsArray *mListeners;
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};
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#endif
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