webcorewidget.h

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/*
 * Copyright (c) 2005 Nokia Corporation, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the Nokia Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef MWEBCOREWIDGET_H_
#define MWEBCOREWIDGET_H_

//  INCLUDES
#include <e32base.h>
#include <bitstd.h>
#include  "WebCorePalette.h"



// DATA TYPES
typedef enum {
    EWebCoreScrollBarAuto,
    EWebCoreScrollBarAlwaysOff,
    EWebCoreScrollBarAlwaysOn
} TWebCoreScrollBarMode;

// FORWARD DECLARATIONS
class MWebCoreScrollView;
class QPainter;
class CCoeControl;
class MWebCoreInputWidget;
class MWebCoreButtonWidget;
class MWebCoreSelectWidget;
class MWebCoreCheckBoxControl;
class MWebCoreRadioButtonControl;
class CWebCoreGraphicsContext;


/**
*  interface, used by widget classes
*  @lib webcore.lib
*  @since 3.1
*/
class MWebCoreWidget
  {
  public:

    virtual void Draw(CWebCoreGraphicsContext& /*aGc*/,
                      const TRect& /*aRect*/) = 0;

    virtual TBool IsVisible() const = 0;

    virtual TRect Rect() const = 0;

    virtual TSize SizeHint() const = 0;

    virtual TBool IsFocused() const = 0;

    virtual void MakeVisible(TBool /*aVisible*/) = 0;

    virtual void SetFocus(TBool aFocus) = 0;

    virtual void SetRect(const TRect& aRect) = 0;

    virtual void Activate() = 0;

    virtual void SetParent( MWebCoreScrollView* aParent ) =  0;

	virtual void Close() = 0;

    virtual TBool IsScrollView() const { return EFalse; }

    virtual void SetPalette(TWebCorePalette) {}

	virtual void SetOutlineWidth(TUint8 ) {}

    virtual void SetWritingDirectionRtl(TBool) {}
  };


/**
*  interface, used by widget classes
*  @lib webcore.lib
*  @since 3.1
*/
class MWebCoreScrollView: public MWebCoreWidget
  {
  public:

    TBool IsScrollView() const { return ETrue; }

    virtual TSize SizeHint() const { return TSize(); }

    virtual void Draw(CWebCoreGraphicsContext& /*aGc*/,
                      const TRect& /*aRect*/) { }

    virtual void InvalidateRect(const TRect& /*aRect*/,
                                TBool /*aDrawNow*/) = 0;

    virtual void ScrollTo(TPoint /*aPoint*/) = 0;

    virtual TRect VisibleRect() const = 0;

    virtual TSize ContentSize() const = 0;

    virtual void ResizeContent(TSize /*aSize*/) = 0;

    virtual void SetMayUseCopyScroll(TBool /*aCopy*/) = 0;

    virtual TPoint ConvertContentToView(TPoint /*aPoint*/) = 0;

    virtual TPoint ConvertViewToContent(TPoint /*aPoint*/) = 0;

    virtual TBool HasHorizontalScrollBar() const = 0;

    virtual TBool HasVerticalScrollBar() const = 0;

    virtual void SetHorizontalScrollingMode(TWebCoreScrollBarMode /*aScrollMode*/) = 0;

    virtual void SetVerticalScrollingMode(TWebCoreScrollBarMode /*aScrollMode*/) = 0;

    virtual void SetScrollingMode(TWebCoreScrollBarMode /*aScrollMode*/) = 0;

    virtual TWebCoreScrollBarMode HorizontalScrollingMode() = 0;

    virtual TWebCoreScrollBarMode VerticalScrollingMode() = 0;

    virtual void SetScrollBarsSuppressed(TBool /*aSuppressed*/, TBool /*aRepaintOnUnsuppress*/) = 0;

    virtual void AddChild(MWebCoreWidget* /*aChild*/, TInt /*aX*/ , TInt /*aY*/ ) = 0;

    virtual TInt ScalingFactor() const = 0;

    inline TPoint ToDocCoords(const TPoint& aFrom) const
        {
        TInt z = ScalingFactor();
        return TPoint(aFrom.iX*100/z,aFrom.iY*100/z);
        }

    inline TSize ToDocCoords(const TSize& aFrom) const
        {
        TInt z = ScalingFactor();
        return TSize(aFrom.iWidth*100/z,aFrom.iHeight*100/z);
        }

    inline TRect ToDocCoords(const TRect& aFrom) const
        {
        return TRect(ToDocCoords(aFrom.iTl),ToDocCoords(aFrom.iBr));
        }

    inline TPoint ToViewCoords(const TPoint& aFrom) const
        {
        TInt z = ScalingFactor();
        return TPoint(aFrom.iX*z/100,aFrom.iY*z/100);
        }

    inline TSize ToViewCoords(const TSize& aFrom) const
        {
        TInt z = ScalingFactor();
        return TSize(aFrom.iWidth*z/100,aFrom.iHeight*z/100);
        }

    inline TRect ToViewCoords(const TRect& aFrom) const
        {
        return TRect(ToViewCoords(aFrom.iTl),ToViewCoords(aFrom.iBr));
        }

    inline TBool IsScaled() const { return ScalingFactor()!=100; }
  };


/**
*  MWebCoreObjectWidget
*  The MWebCoreObjectWidget class represents the interface that the plugin widget
*  has to implement
*
*  @lib webcore.dll
*/
class MWebCoreObjectWidget: public MWebCoreWidget
    {
    public: // Constructor and Deconstrutor

        virtual ~MWebCoreObjectWidget() {};

    public: // Class Methods

    // Object related methods

    // Returns ETrue if the widget is active
    virtual TBool IsActive() const = 0;

    // Deactivates the plugin
    virtual void DeActivate() = 0;

    // Sets the font
    virtual void SetFont(CFont* aFont) = 0;
    };

#endif //MWEBCOREWIDGET_H_