dc.h

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

/////////////////////////////////////////////////////////////////////////////
// Name:        dc.h
// Purpose:     wxDC class
// Author:      Stefan Csomor
// Modified by:
// Created:     1998-01-01
// RCS-ID:      $Id: dc.h,v 1.10 2006/10/29 17:55:09 RR Exp $
// Copyright:   (c) Stefan Csomor
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_DC_H_
#define _WX_DC_H_

#include "wx/pen.h"
#include "wx/brush.h"
#include "wx/icon.h"
#include "wx/font.h"
#include "wx/gdicmn.h"

//-----------------------------------------------------------------------------
// constants
//-----------------------------------------------------------------------------

#ifndef MM_TEXT
#define MM_TEXT            0
#define MM_ISOTROPIC    1
#define MM_ANISOTROPIC    2
#define MM_LOMETRIC        3
#define MM_HIMETRIC        4
#define MM_TWIPS        5
#define MM_POINTS        6
#define MM_METRIC        7
#endif

//-----------------------------------------------------------------------------
// global variables
//-----------------------------------------------------------------------------

class wxMacPortStateHelper ;
//-----------------------------------------------------------------------------
// wxDC
//-----------------------------------------------------------------------------

class WXDLLEXPORT wxDC: public wxDCBase
{
    DECLARE_DYNAMIC_CLASS(wxDC)
    DECLARE_NO_COPY_CLASS(wxDC)

  public:

    wxDC();
    virtual ~wxDC();


    // implement base class pure virtuals
    // ----------------------------------

    virtual void Clear();

    virtual bool StartDoc( const wxString& WXUNUSED(message) ) { return true; }
    virtual void EndDoc(void) {};

    virtual void StartPage(void) {};
    virtual void EndPage(void) {};

    virtual void SetFont(const wxFont& font);
    virtual void SetPen(const wxPen& pen);
    virtual void SetBrush(const wxBrush& brush);
    virtual void SetBackground(const wxBrush& brush);
    virtual void SetBackgroundMode(int mode);
    virtual void SetPalette(const wxPalette& palette);

    virtual void DestroyClippingRegion();

    virtual wxCoord GetCharHeight() const;
    virtual wxCoord GetCharWidth() const;
    virtual void DoGetTextExtent(const wxString& string,
                                 wxCoord *x, wxCoord *y,
                                 wxCoord *descent = NULL,
                                 wxCoord *externalLeading = NULL,
                                 wxFont *theFont = NULL) const;
    virtual bool DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const;

    virtual bool CanDrawBitmap() const;
    virtual bool CanGetTextExtent() const;
    virtual int GetDepth() const;
    virtual wxSize GetPPI() const;

    virtual void SetMapMode(int mode);
    virtual void SetUserScale(double x, double y);

    virtual void SetLogicalScale(double x, double y);
    virtual void SetLogicalOrigin(wxCoord x, wxCoord y);
    virtual void SetDeviceOrigin(wxCoord x, wxCoord y);
    virtual void SetAxisOrientation(bool xLeftRight, bool yBottomUp);
    virtual void SetLogicalFunction(int function);

    virtual void SetTextForeground(const wxColour& colour) ;
    virtual void SetTextBackground(const wxColour& colour) ;

    virtual void ComputeScaleAndOrigin();

  public:

    wxCoord XDEV2LOG(wxCoord x) const
    {
        return wxRound((double)(x - m_deviceOriginX) / m_scaleX) * m_signX + m_logicalOriginX;
    }
    wxCoord XDEV2LOGREL(wxCoord x) const
    {
        return wxRound((double)(x) / m_scaleX);
    }
    wxCoord YDEV2LOG(wxCoord y) const
    {
        return wxRound((double)(y - m_deviceOriginY) / m_scaleY) * m_signY + m_logicalOriginY;
    }
    wxCoord YDEV2LOGREL(wxCoord y) const
    {
        return wxRound((double)(y) / m_scaleY);
    }
    wxCoord XLOG2DEV(wxCoord x) const
    {
        return wxRound((double)(x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX;
    }
    wxCoord XLOG2DEVREL(wxCoord x) const
    {
        return wxRound((double)(x) * m_scaleX);
    }
    wxCoord YLOG2DEV(wxCoord y) const
    {
        return wxRound((double)(y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY;
    }
    wxCoord YLOG2DEVREL(wxCoord y) const
    {
        return wxRound((double)(y) * m_scaleY);
    }

    wxCoord XLOG2DEVMAC(wxCoord x) const
    {
        return wxRound((double)(x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX + m_macLocalOrigin.x;
    }

    wxCoord YLOG2DEVMAC(wxCoord y) const
    {
        return wxRound((double)(y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY + m_macLocalOrigin.y;
    }

    WXHRGN MacGetCurrentClipRgn() { return m_macCurrentClipRgn ; }
    static void MacSetupBackgroundForCurrentPort(const wxBrush& background ) ;
//

protected:
    virtual bool DoFloodFill(wxCoord x, wxCoord y, const wxColour& col,
                             int style = wxFLOOD_SURFACE);

    virtual bool DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const;

    virtual void DoDrawPoint(wxCoord x, wxCoord y);
    virtual void DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2);

    virtual void DoDrawArc(wxCoord x1, wxCoord y1,
                           wxCoord x2, wxCoord y2,
                           wxCoord xc, wxCoord yc);

    virtual void DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h,
                                   double sa, double ea);

    virtual void DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height);
    virtual void DoDrawRoundedRectangle(wxCoord x, wxCoord y,
                                        wxCoord width, wxCoord height,
                                        double radius);
    virtual void DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height);

    virtual void DoCrossHair(wxCoord x, wxCoord y);

    virtual void DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y);
    virtual void DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y,
                              bool useMask = false);

    virtual void DoDrawText(const wxString& text, wxCoord x, wxCoord y);
    virtual void DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y,
                                   double angle);

    virtual bool DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
                        wxDC *source, wxCoord xsrc, wxCoord ysrc,
                        int rop = wxCOPY, bool useMask = false, wxCoord xsrcMask = -1, wxCoord ysrcMask = -1);

    // this is gnarly - we can't even call this function DoSetClippingRegion()
    // because of virtual function hiding
    virtual void DoSetClippingRegionAsRegion(const wxRegion& region);
    virtual void DoSetClippingRegion(wxCoord x, wxCoord y,
                                     wxCoord width, wxCoord height);

    virtual void DoGetSizeMM(int* width, int* height) const;

    virtual void DoDrawLines(int n, wxPoint points[],
                             wxCoord xoffset, wxCoord yoffset);
    virtual void DoDrawPolygon(int n, wxPoint points[],
                               wxCoord xoffset, wxCoord yoffset,
                               int fillStyle = wxODDEVEN_RULE);

  protected:
    //begin wxmac
    // Variables used for scaling
    double       m_mm_to_pix_x,m_mm_to_pix_y;
    // not yet used
    bool         m_needComputeScaleX,m_needComputeScaleY;
    // If un-scrolled is non-zero or d.o. changes with scrolling.
    // Set using SetInternalDeviceOrigin().
    long         m_internalDeviceOriginX,m_internalDeviceOriginY;
     // To be set by external classes such as wxScrolledWindow
     // using SetDeviceOrigin()
    long         m_externalDeviceOriginX,m_externalDeviceOriginY;

    // Begin implementation for Mac
    public:

    WXHDC                m_macPort ;
    WXHBITMAP            m_macMask ;

    // in order to preserve the const inheritance of the virtual functions, we have to
    // use mutable variables starting from CWPro 5

    void                    MacInstallFont() const ;
    void                    MacInstallPen() const ;
    void                    MacInstallBrush() const ;

    mutable bool    m_macFontInstalled ;
    mutable bool    m_macPenInstalled ;
    mutable bool    m_macBrushInstalled ;

    WXHRGN                    m_macBoundaryClipRgn ;
    WXHRGN                  m_macCurrentClipRgn ;
    wxPoint                    m_macLocalOrigin ;
    void                    MacSetupPort( wxMacPortStateHelper* ph ) const ;
    void                    MacCleanupPort( wxMacPortStateHelper* ph ) const ;
    mutable void*                   m_macATSUIStyle ;
    mutable wxMacPortStateHelper*   m_macCurrentPortStateHelper ;
    mutable bool                    m_macFormerAliasState ;
    mutable short                   m_macFormerAliasSize ;
    mutable bool                    m_macAliasWasEnabled ;
    mutable void*                   m_macForegroundPixMap ;
    mutable void*                   m_macBackgroundPixMap ;
};

#endif
    // _WX_DC_H_