Back to index

lightning-sunbird  0.9+nobinonly
nsDeviceContextQt.h
Go to the documentation of this file.
00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is mozilla.org code.
00016  *
00017  * The Initial Developer of the Original Code is
00018  * Netscape Communications Corporation.
00019  * Portions created by the Initial Developer are Copyright (C) 1998
00020  * the Initial Developer. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Lars Knoll <knoll@kde.org>
00024  *   Zack Rusin <zack@kde.org>
00025  *   John C. Griggs <johng@corel.com>
00026  *
00027  * Alternatively, the contents of this file may be used under the terms of
00028  * either the GNU General Public License Version 2 or later (the "GPL"), or
00029  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00030  * in which case the provisions of the GPL or the LGPL are applicable instead
00031  * of those above. If you wish to allow use of your version of this file only
00032  * under the terms of either the GPL or the LGPL, and not to allow others to
00033  * use your version of this file under the terms of the MPL, indicate your
00034  * decision by deleting the provisions above and replace them with the notice
00035  * and other provisions required by the GPL or the LGPL. If you do not delete
00036  * the provisions above, a recipient may use your version of this file under
00037  * the terms of any one of the MPL, the GPL or the LGPL.
00038  *
00039  * ***** END LICENSE BLOCK ***** */
00040 #ifndef nsDeviceContextQt_h___
00041 #define nsDeviceContextQt_h___
00042 
00043 #include "nsDeviceContext.h"
00044 #include "nsUnitConversion.h"
00045 #include "nsIWidget.h"
00046 #include "nsIView.h"
00047 #include "nsIRenderingContext.h"
00048 
00049 class QWidget;
00050 
00051 class nsDeviceContextQt : public DeviceContextImpl
00052 {
00053 public:
00054     nsDeviceContextQt();
00055     virtual ~nsDeviceContextQt();
00056 
00057     NS_IMETHOD  Init(nsNativeWidget aNativeWidget);
00058 
00059     NS_IMETHOD  CreateRenderingContext(nsIRenderingContext *&aContext);
00060     NS_IMETHOD  CreateRenderingContext(nsIView *aView, nsIRenderingContext *&aContext)
00061     {return (DeviceContextImpl::CreateRenderingContext(aView,aContext));}
00062     NS_IMETHOD  CreateRenderingContext(nsIWidget *aWidget, nsIRenderingContext *&aContext)
00063     {return (DeviceContextImpl::CreateRenderingContext(aWidget,aContext));}
00064     NS_IMETHOD  CreateRenderingContext(nsIDrawingSurface* aSurface, nsIRenderingContext *&aContext)
00065     {return (DeviceContextImpl::CreateRenderingContext(aSurface, aContext));}
00066     NS_IMETHOD  CreateRenderingContextInstance(nsIRenderingContext *&aContext);
00067 
00068     NS_IMETHOD  SupportsNativeWidgets(PRBool &aSupportsWidgets);
00069 
00070     NS_IMETHOD  GetScrollBarDimensions(float &aWidth,float &aHeight) const;
00071     NS_IMETHOD  GetSystemFont(nsSystemFontID anID, nsFont *aFont) const;
00072 
00073     NS_IMETHOD CheckFontExistence(const nsString &aFontName);
00074 
00075     NS_IMETHOD GetDeviceSurfaceDimensions(PRInt32 &aWidth,PRInt32 &aHeight);
00076     NS_IMETHOD GetClientRect(nsRect &aRect);
00077     NS_IMETHOD GetRect(nsRect &aRect);
00078 
00079     NS_IMETHOD GetDeviceContextFor(nsIDeviceContextSpec *aDevice,
00080                                    nsIDeviceContext *&aContext);
00081 
00082     NS_IMETHOD BeginDocument(PRUnichar * aTitle, PRUnichar* aPrintToFileName,
00083                              PRInt32 aStartPage, PRInt32 aEndPage);
00084     NS_IMETHOD EndDocument(void);
00085 
00086     NS_IMETHOD BeginPage(void);
00087     NS_IMETHOD EndPage(void);
00088 
00089     // Overridden DeviceContextImpl functions.
00090     NS_IMETHOD GetDepth(PRUint32 &aDepth);
00091 
00092     NS_IMETHOD Observe(nsISupports* aSubject, const char* aTopic,
00093                        const PRUnichar* aData);
00094 
00095     nsresult   SetDPI(PRInt32 dpi);
00096 
00097 private:
00098     PRUint32      mDepth;
00099     PRInt16       mScrollbarHeight;
00100     PRInt16       mScrollbarWidth;
00101     QWidget     *mWidget;
00102     PRInt32       mWidth;
00103     PRInt32       mHeight;
00104     float         mWidthFloat;
00105     float         mHeightFloat;
00106 
00107     static nscoord mDpi;
00108 
00109     nsresult GetSystemFontInfo(nsFont *aFont) const;
00110 };
00111 
00112 #endif /* nsDeviceContextQt_h___ */
00113