356 lines
12 KiB
C++
356 lines
12 KiB
C++
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/**********************************************************************/
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/** Microsoft Windows/NT **/
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/** Copyright(c) Microsoft Corp., 1991 **/
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/**********************************************************************/
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/*
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bltdc.hxx
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BLT display and device context wrappers: definition
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FILE HISTORY:
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beng 15-May-1991 Split from bltmisc.hxx
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terryk 18-Jul-1991 Add more function to DEVICE_CONTEXT.
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terryk 20-Jul-1991 Add PAINT_DEVICE_CONTEXT object
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Add fReleaseDC in DISPLAY_WINDOW
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johnl 09-Sep-1991 Added DrawFocusRect
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beng 26-Sep-1991 C7 delta
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KeithMo 07-Aug-1992 STRICTified.
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*/
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#ifndef _BLT_HXX_
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#error "Don't include this file directly; instead, include it through blt.hxx"
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#endif // _BLT_HXX_
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#ifndef _BLTDC_HXX_
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#define _BLTDC_HXX_
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#include "base.hxx"
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#include "bltbitmp.hxx" // DISPLAY_MAP
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#include "bltmisc.hxx" // XYDIMENSION
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#include "string.hxx" // NLS_STR et al.
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#include "bltrect.hxx"
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DLL_CLASS WINDOW;
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#if !defined(MAKEINTRESOURCE) // was windows not yet included?
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struct TEXTMETRIC; // declared in windows.h as part of GDI
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#endif
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/**********************************************************************
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NAME: DEVICE_CONTEXT
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SYNOPSIS: Device context class (general GDI fun and games)
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INTERFACE: DEVICE_CONTEXT() - constructor
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~DEVICE_CONTEXT() - destructor
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SelectPen() - select an HPEN into the DC
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SelectFont() - select an HFONT into the DC
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SelectBrush() - select an HBRUSH into the DC
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SelectBitmap() - select an HBITMAP into the DC
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QueryTextExtent() - get the width and height of a string
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QueryTextMetrics() - get the font information
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QueryHdc() - return the current HDC
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BitBlt() - call Window bitblt
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TextOut() - display text
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InvertRect() - invert the color within the
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given rectangle
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DrawFocusRect() - Draw Windows focus rectangle (this is
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an xor operation).
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DrawRect() - Draws a filled rectangle (using current
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selected brush)
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FrameRect() - Draws an unfilled rectangle using the
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passed brush
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SetBkMode() - Sets the background draw mode (OPAQUE
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or TRANSPARENT).
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GetBkMode() - Queries the background draw mode
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SetMapMode() - sets the mapping mode (e.g. MM_TEXT)
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GetMapMode() - queries the mapping mode
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SetBkColor() - set the background color
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GetBkColor() - query the background color
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SetTextColor() - set the text color
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GetTextColor() - query the text color
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ExtTextOut() - extension of text out function
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DrawText() - draws text
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USES: XYDIMENSION
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CAVEATS:
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Most of these functions are just thin wrappers around GDI functions.
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They don't have much on-line help. Go look it up in WinHelp!
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NOTES:
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Get functions should be Query. Yeah, yeah.
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HISTORY:
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RustanL 21-Nov-1990 Created
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terryk 10-Apr-1991 add QueryHdc
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terryk 11-Apr-1991 add GetPolyFillMode, SetPolyFillMode,
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Polygon, InvertRect
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beng 15-May-1991 Change QueryTextExtent; make
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QueryHdc const
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beng 10-Jul-1991 Remove Paint member; add QueryFontHeight,
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TextOut; additional forms of BitBlt
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terryk 18-Jul-1991 Add more functions:
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SetBkColor()
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SetTextColor()
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SetTextAlign()
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ExtTextOut()
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GetBkColor()
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Johnl 09-Sep-1991 Added DrawFocusRect()
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Johnl 11-Sep-1991 Added DrawRect(), FrameRect, SetBkMode &
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GetBkMode
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beng 04-Oct-1991 Win32 conversion
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beng 09-Oct-1991 Disabled Polygon member fcns
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beng 30-Mar-1992 All Color fcns take COLORREF parms; MapMode
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fcns; inline many fcns
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beng 05-May-1992 Added nls ExtTextOut; DrawText member
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beng 12-May-1992 Added LineTo, MoveTo, QueryAveCharWidth members
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KeithMo 07-Aug-1992 Added type-specific SelectXxx methods, made the
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generic SelectObject protected.
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**********************************************************************/
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DLL_CLASS DEVICE_CONTEXT
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{
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private:
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HDC _hDC;
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protected:
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HGDIOBJ SelectObject( HGDIOBJ hObject )
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{ return ::SelectObject( _hDC, hObject ); }
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public:
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DEVICE_CONTEXT( HDC hDC ) : _hDC(hDC) {};
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HDC QueryHdc() const
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{ return _hDC; }
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HPEN SelectPen( HPEN hPen )
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{ return (HPEN)SelectObject( (HGDIOBJ)hPen ); }
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HFONT SelectFont( HFONT hFont )
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{ return (HFONT)SelectObject( (HGDIOBJ)hFont ); }
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HBRUSH SelectBrush( HBRUSH hBrush )
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{ return (HBRUSH)SelectObject( (HGDIOBJ)hBrush ); }
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HBITMAP SelectBitmap( HBITMAP hBitmap )
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{ return (HBITMAP)SelectObject( (HGDIOBJ)hBitmap ); }
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XYDIMENSION QueryTextExtent( const TCHAR * psz, UINT cbTextLen ) const;
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XYDIMENSION QueryTextExtent( const NLS_STR &nls ) const;
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BOOL QueryTextMetrics( TEXTMETRIC * ptm ) const;
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INT QueryFontHeight() const;
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INT QueryAveCharWidth() const;
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BOOL TextOut( const NLS_STR &nls, XYPOINT xy ) const;
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BOOL TextOut( const NLS_STR &nls, XYPOINT xy,
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const RECT * prectClip ) const;
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BOOL TextOut( const TCHAR *psz, INT cch, INT xLeft, INT yTop ) const;
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BOOL TextOut( const TCHAR *psz, INT cch,
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INT xLeft, INT yTop, const RECT * prectClip ) const;
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BOOL BitBlt( INT xDest, INT yDest,
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INT dxDest, INT dyDest,
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const DEVICE_CONTEXT & dcSource,
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INT xSource, INT ySource,
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ULONG ulRasterOperation );
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BOOL BitBlt( const XYPOINT & xyDest,
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XYDIMENSION dxyDest,
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const DEVICE_CONTEXT & dcSource,
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const XYPOINT & xySource,
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ULONG ulRasterOperation );
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VOID DrawFocusRect( const RECT * pRect ) const;
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VOID DrawRect( const RECT * lpRect ) const;
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VOID FrameRect( const RECT * lpRect, HBRUSH hBrush ) const;
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VOID InvertRect( const RECT * lpRect ) const;
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#if 0 // (disabled - never used, too much trouble to wrap)
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BOOL Polygon( const POINT * ppt, INT cxy ) const;
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INT GetPolyFillMode() const;
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INT SetPolyFillMode( INT nPolyFillMode );
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#endif
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INT GetMapMode() const
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{ return ::GetMapMode( _hDC ); }
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INT SetMapMode( INT nNewMapMode )
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{ return ::SetMapMode( _hDC, nNewMapMode ); }
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INT GetBkMode() const
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{ return ::GetBkMode( _hDC ); }
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INT SetBkMode( INT nNewBkMode )
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{ return ::SetBkMode( _hDC, nNewBkMode ); }
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COLORREF GetBkColor() const
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{ return ::GetBkColor( _hDC ); }
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COLORREF SetBkColor( COLORREF crColor )
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{ return ::SetBkColor( _hDC, crColor ); }
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COLORREF GetTextColor() const
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{ return ::GetTextColor( _hDC ); }
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COLORREF SetTextColor( COLORREF crColor )
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{ return ::SetTextColor( _hDC, crColor ); }
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INT DrawText( const NLS_STR & nls, RECT * prc, UINT nStyles )
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{ return ::DrawText( _hDC, nls.QueryPch(), -1, prc, nStyles ); }
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UINT SetTextAlign( UINT wFlag );
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BOOL ExtTextOut( INT x, INT y, UINT nOptions, const RECT * lpRect,
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const TCHAR * pszStr, INT cch, INT * pDx = NULL );
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BOOL ExtTextOut( INT x, INT y, UINT nOptions, const RECT * prect,
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const NLS_STR & nls, INT * pDx = NULL )
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{ return ExtTextOut(x, y, nOptions, prect, nls.QueryPch(),
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nls.QueryTextLength(), pDx); }
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VOID LineTo( INT x, INT y ) const
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{ ::LineTo( _hDC, x, y ); }
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VOID MoveTo( INT x, INT y ) const
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{ ::MoveToEx( _hDC, x, y, NULL ); }
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};
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/**********************************************************************
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NAME: DISPLAY_CONTEXT
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SYNOPSIS: Display context
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INTERFACE: DISPLAY_CONTEXT() - constructor
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~DISPLAY_CONTEXT() - destructor
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QueryTextWidth() - return the width of the given string
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in logical units on the screen
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PARENT: DEVICE_CONTEXT
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USES: WINDOW
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HISTORY:
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RustanL 21-Nov-1990 Created
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terryk 10-Apr-1991 Add querytextwidth
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beng 04-Oct-1991 Win32 conversion
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**********************************************************************/
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DLL_CLASS DISPLAY_CONTEXT : public DEVICE_CONTEXT
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{
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private:
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HWND _hwnd;
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BOOL _fReleaseDC;
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protected:
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HWND QueryHwnd() { return _hwnd; }
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public:
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DISPLAY_CONTEXT( HWND hwnd );
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DISPLAY_CONTEXT( WINDOW * pwin );
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DISPLAY_CONTEXT( WINDOW * pwin, HDC hdc );
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~DISPLAY_CONTEXT();
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INT QueryTextWidth( const NLS_STR & nlsStr ) const;
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INT QueryTextWidth( const TCHAR * psz, UINT cbTextLen ) const;
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};
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/**********************************************************************
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NAME: PAINT_DISPLAY_CONTEXT
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SYNOPSIS: Replace BeginPaint and EndPaint in window
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INTERFACE: PAINT_DISPLAY_CONTEXT() - constructor. Call ::BeginPaint.
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~PAINT_DISPLAY_CONTEXT() - destructor. Call ::EndPaint.
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PARENT: DISPLAY_CONTEXT
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USES: WINDOW
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HISTORY:
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terryk 20-Jul-1991 Created
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beng 09-Oct-1991 Shrank a bit
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beng 14-May-1992 Added QueryInvalidRect
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**********************************************************************/
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DLL_CLASS PAINT_DISPLAY_CONTEXT : public DISPLAY_CONTEXT
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{
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private:
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PAINTSTRUCT _ps;
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XYRECT _rNeedsPainting; // Has to copy into this just to
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// use the XYRECT member fcns.
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// CODEWORK: make an adopting XYRECT.
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public:
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PAINT_DISPLAY_CONTEXT( WINDOW * pwnd )
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: DISPLAY_CONTEXT( pwnd, ::BeginPaint( pwnd->QueryHwnd(), &_ps )),
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_rNeedsPainting(_ps.rcPaint)
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{ ; }
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~PAINT_DISPLAY_CONTEXT()
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{ ::EndPaint( QueryHwnd(), &_ps ); }
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const XYRECT & QueryInvalidRect() const
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{ return _rNeedsPainting; }
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};
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/**********************************************************************
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NAME: MEMORY_DC
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SYNOPSIS: "Memory" device context (copied from existing DC)
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INTERFACE: MEMORY_DC() - constructor
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~MEMORY_DC() - destructor
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PARENT: DEVICE_CONTEXT
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HISTORY:
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RustanL 21-Nov-1990 Created
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**********************************************************************/
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DLL_CLASS MEMORY_DC : public DEVICE_CONTEXT
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{
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public:
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MEMORY_DC( DEVICE_CONTEXT & dc );
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~MEMORY_DC();
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};
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/**********************************************************************
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NAME: SCREEN_DC
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SYNOPSIS: Screen device context
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INTERFACE: SCREEN_DC() - constructor
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~SCREEN_DC() - destructor
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PARENT: DEVICE_CONTEXT
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HISTORY:
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RustanL 21-Nov-1990 Created
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**********************************************************************/
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DLL_CLASS SCREEN_DC : public DEVICE_CONTEXT
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{
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public:
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SCREEN_DC();
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~SCREEN_DC();
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};
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#endif // _BLTDC_HXX_ - end of file
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