163 lines
3.8 KiB
C++
163 lines
3.8 KiB
C++
/*
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* DEVDSC.C
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*
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* Purpose:
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* CDevDesc (Device Descriptor) class
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*
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* Owner:
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* Original RichEdit code: David R. Fulmer
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* Christian Fortini
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* Murray Sargent
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*/
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#include "_common.h"
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#include "_devdsc.h"
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#include "_edit.h"
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#include "_font.h"
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ASSERTDATA
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BOOL CDevDesc::SetDC(HDC hdc, LONG dxpInch, LONG dypInch)
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::SetDC");
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AssertSz((NULL == hdc) || (GetDeviceCaps(hdc, TECHNOLOGY) != DT_METAFILE),
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"CDevDesc::SetDC attempting to set a metafile");
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_hdc = hdc;
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if(!_hdc)
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{
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if(!_ped->_fInPlaceActive || !(hdc = _ped->TxGetDC()))
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{
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_dxpInch = _dypInch = 0;
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return FALSE;
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}
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}
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if (dxpInch == -1)
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{
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// Get device metrics - these should both succeed
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_dxpInch = (SHORT)GetDeviceCaps(hdc, LOGPIXELSX);
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AssertSz(_dxpInch != 0, "CDevDesc::SetDC _dxpInch is 0");
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}
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else
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_dxpInch = dxpInch;
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if (dypInch == -1)
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{
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_dypInch = (SHORT)GetDeviceCaps(hdc, LOGPIXELSY);
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AssertSz(_dypInch != 0, "CDevDesc::SetDC _dypInch is 0");
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}
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else
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_dypInch = dypInch;
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if(!_dxpInch || !_dypInch)
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return FALSE;
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// Release DC if we got the window DC
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if(!_hdc)
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_ped->TxReleaseDC(hdc);
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return TRUE;
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}
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void CDevDesc::SetMetafileDC(
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HDC hdcMetafile,
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LONG xMeasurePerInch,
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LONG yMeasurePerInch)
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{
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_fMetafile = TRUE;
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_hdc = hdcMetafile;
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_dxpInch = (SHORT) xMeasurePerInch;
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_dypInch = (SHORT) yMeasurePerInch;
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}
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HDC CDevDesc::GetScreenDC() const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::GetScreenDC");
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Assert(!_hdc);
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Assert(_ped);
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return _ped->TxGetDC();
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}
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VOID CDevDesc::ReleaseScreenDC(HDC hdc) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::ReleaseScreenDC");
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Assert(!_hdc);
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Assert(_ped);
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_ped->TxReleaseDC(hdc);
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}
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LONG CDevDesc::DXtoLX(LONG x) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::DXtoLX");
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AssertSz(_dxpInch, "CDevDesc::DXtoLX() - hdc has not been set");
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return ((x * LX_PER_INCH) * 2 + _dxpInch) / (2 * _dxpInch);
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}
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LONG CDevDesc::DYtoLY(LONG y) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::DYtoLY");
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AssertSz(_dypInch, "CDevDesc::DYtoLY() - hdc has not been set");
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return ((y * LY_PER_INCH) * 2 + _dypInch) / (2 * _dypInch);
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}
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void CDevDesc::DPtoLP(POINT &ptDest, const POINT &ptSrc) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::DPtoLP");
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ptDest.x = DXtoLX(ptSrc.x);
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ptDest.y = DYtoLY(ptSrc.y);
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}
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void CDevDesc::DRtoLR(RECT &rcDest, const RECT &rcSrc) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::DRtoLR");
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rcDest.left = DXtoLX(rcSrc.left);
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rcDest.right = DXtoLX(rcSrc.right);
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rcDest.top = DYtoLY(rcSrc.top);
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rcDest.bottom = DYtoLY(rcSrc.bottom);
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}
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#ifdef DEBUG
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LONG CDevDesc::LXtoDX(LONG x) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::LXtoDX");
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AssertSz(_dxpInch, "CDevDesc::LXtoDX() - hdc has not been set");
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return ((x * _dxpInch) + LX_PER_INCH / 2) / LX_PER_INCH;
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}
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LONG CDevDesc::LYtoDY(LONG y) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::LYtoDY");
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AssertSz(_dypInch, "CDevDesc::LYtoDY() - hdc has not been set");
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return ((y * _dypInch) + LY_PER_INCH / 2) / LY_PER_INCH;
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}
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#endif // DEBUG
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void CDevDesc::LPtoDP(POINT &ptDest, const POINT &ptSrc) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::LPtoDP");
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ptDest.x = LXtoDX(ptSrc.x);
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ptDest.y = LYtoDY(ptSrc.y);
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}
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void CDevDesc::LRtoDR(RECT &rcDest, const RECT &rcSrc) const
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{
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TRACEBEGIN(TRCSUBSYSDISP, TRCSCOPEINTERN, "CDevDesc::LRtoDR");
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rcDest.left = LXtoDX(rcSrc.left);
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rcDest.right = LXtoDX(rcSrc.right);
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rcDest.top = LYtoDY(rcSrc.top);
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rcDest.bottom = LYtoDY(rcSrc.bottom);
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}
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