You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
152 lines
3.4 KiB
152 lines
3.4 KiB
/*
|
|
* _DEVDSC.H
|
|
*
|
|
* Purpose:
|
|
* CDevDesc (Device Descriptor) class
|
|
*
|
|
* Authors:
|
|
* Original RichEdit code: David R. Fulmer
|
|
* Christian Fortini
|
|
* Murray Sargent
|
|
*/
|
|
|
|
#ifndef _DEVDSC_H
|
|
#define _DEVDSC_H
|
|
|
|
|
|
class CTxtEdit;
|
|
|
|
// device descriptor
|
|
class CDevDesc
|
|
{
|
|
friend class CMeasurer;
|
|
protected:
|
|
CTxtEdit * _ped; // used to GetDC and ReleaseDC
|
|
|
|
HDC _hdc; // hdc for rendering device
|
|
BOOL _fMetafile; // Is this device a metafile.
|
|
|
|
SHORT _dxpInch; // device units per horizontal "inch"
|
|
SHORT _dypInch; // device units per vertical "inch"
|
|
|
|
HDC GetScreenDC () const;
|
|
void ReleaseScreenDC (HDC hdc) const;
|
|
|
|
public:
|
|
CDevDesc(CTxtEdit * ped)
|
|
{
|
|
_fMetafile = FALSE;
|
|
_ped = ped;
|
|
_dxpInch = 0;
|
|
_hdc = NULL;
|
|
_dypInch = 0;
|
|
}
|
|
|
|
// Test validity of device descriptor
|
|
// (whether SetDC has been properly called)
|
|
BOOL IsValid() const {return _dxpInch != 0 && _dypInch != 0;}
|
|
|
|
BOOL IsMetafile() const
|
|
{
|
|
if(!_hdc)
|
|
return FALSE;
|
|
|
|
return _fMetafile;
|
|
}
|
|
|
|
|
|
BOOL SetDC(HDC hdc, LONG dxpInch = -1, LONG dypInch = -1);
|
|
|
|
void SetMetafileDC(
|
|
HDC hdcMetafile,
|
|
LONG xMeasurePerInch,
|
|
LONG yMeasurePerInch);
|
|
|
|
void ResetDC() { SetDC(NULL); }
|
|
|
|
//REVIEW (keithcu) GetScreenDC/ReleaseScreenDC needed?
|
|
HDC GetDC() const
|
|
{
|
|
if(_hdc)
|
|
return _hdc;
|
|
return GetScreenDC();
|
|
}
|
|
|
|
void ReleaseDC(HDC hdc) const
|
|
{
|
|
if(!_hdc)
|
|
ReleaseScreenDC(hdc);
|
|
}
|
|
|
|
// Methods for converting between pixels and himetric
|
|
LONG HimetricXtoDX(LONG xHimetric) const { return W32->HimetricXtoDX(xHimetric, _dxpInch); }
|
|
LONG HimetricYtoDY(LONG yHimetric) const { return W32->HimetricYtoDY(yHimetric, _dypInch); }
|
|
LONG DXtoHimetricX(LONG dx) const { return W32->DXtoHimetricX(dx, _dxpInch); }
|
|
LONG DYtoHimetricY(LONG dy) const { return W32->DYtoHimetricY(dy, _dypInch); }
|
|
|
|
LONG DXtoLX(LONG x) const;
|
|
LONG DYtoLY(LONG y) const;
|
|
void DPtoLP(POINT &ptDest, const POINT &ptSrc) const;
|
|
void DRtoLR(RECT &rcDest, const RECT &rcSrc) const;
|
|
|
|
#ifdef DEBUG
|
|
LONG LXtoDX(LONG x) const;
|
|
LONG LYtoDY(LONG y) const;
|
|
#else
|
|
LONG LXtoDX(LONG x) const {return ((x * _dxpInch) + LX_PER_INCH / 2) / LX_PER_INCH;}
|
|
LONG LYtoDY(LONG y) const {return ((y * _dypInch) + LY_PER_INCH / 2) / LY_PER_INCH;}
|
|
#endif
|
|
void LPtoDP(POINT &ptDest, const POINT &ptSrc) const;
|
|
void LRtoDR(RECT &rcDest, const RECT &rcSrc) const;
|
|
|
|
BOOL SameDevice(const CDevDesc *pdd) const
|
|
{
|
|
return (_dxpInch == pdd->_dxpInch) && (_dypInch == pdd->_dypInch)
|
|
? TRUE : FALSE;
|
|
}
|
|
|
|
LONG ConvertXToDev(LONG x, const CDevDesc *pdd) const
|
|
{
|
|
return MulDiv(x, _dxpInch, pdd->_dxpInch);
|
|
}
|
|
|
|
LONG ConvertYToDev(LONG y, const CDevDesc *pdd) const
|
|
{
|
|
return MulDiv(y, _dypInch, pdd->_dxpInch);
|
|
}
|
|
|
|
// Assignment
|
|
CDevDesc& operator = (const CDevDesc& dd)
|
|
{
|
|
_hdc = dd._hdc;
|
|
_dxpInch = dd._dxpInch;
|
|
_dypInch = dd._dypInch;
|
|
return *this;
|
|
}
|
|
|
|
// Compares two device descriptors
|
|
BOOL operator == (const CDevDesc& dd) const
|
|
{
|
|
return _hdc == dd._hdc;
|
|
}
|
|
|
|
BOOL operator != (const CDevDesc& dd) const
|
|
{
|
|
return !(*this == dd);
|
|
}
|
|
|
|
LONG GetDxpInch() const
|
|
{
|
|
AssertSz(_dxpInch != 0, "CDevDesc::GetDxpInch_dxpInch is 0");
|
|
return _dxpInch;
|
|
}
|
|
|
|
LONG GetDypInch() const
|
|
{
|
|
AssertSz(_dypInch != 0, "CDevDesc::GetDypInch _dypInch is 0");
|
|
return _dypInch;
|
|
}
|
|
};
|
|
|
|
|
|
#endif
|