class CGXDrawingAndFormatting
CGXDrawingAndFormatting encapsulates some general methods used for drawing and formatting text in the grid. In earlier versions these methods were global methods. The disadvantage was that there was no possibility for you to customize these methods without modifying the source code.
The CGXDrawingAndFormatting class gives you now the possibility to override the default behavior of these methods.
If you have derived a class from CGXDrawingAndFormatting you can force Objective Grid to use your customized methods by calling SetDaFTools.
Example:
class CMyDrawingTools: public CGXDrawingAndFormatting
{
public:
CMyDrawingTools();
virtual CString GXFormatText(const CGXStyle& style, LPCTSTR pszValue = NULL, unsigned nValueType = GX_VT_STRING, CGXGridCore* pGrid = NULL, CGXControl* pControl = NULL);
};
// in your InitInstance method
GXInit();
GXSetDaFTools(new CMyDrawingTools);whereas CMyDrawingTools must be derived from CGXDrawingAndFormatting
The following methods that are documented in "MacrosAndGlobals" can be overriden with this class:
// Text routines
virtual int GXDrawTextLikeMultiLineEdit(CDC* pDC, LPCTSTR lpszString, int nCount, CRect rect, UINT nFormat, LPRECT lpRectClip = NULL);
virtual int GXDrawRotatedText(CDC* pDC, LPCTSTR lpszString, int nCount, CRect rect, UINT nFormat, LONG lfOrientation, LPRECT lpRectClip = NULL);
virtual int GXGetMultiLineTextPosUnderPt(CDC* pDC, LPCTSTR lpszString, int nCount, CRect rect, UINT nFormat, CPoint pt);
virtual int GXGetMultiLineTextBreakCount(CDC* pDC, LPCTSTR lpszString, int nCount, CRect rc, UINT nFormat);
virtual int GXComputeLineBreaks(CDC* pDC, LPCTSTR sz, int nCount, LPRECT rc, UINT nFormat, int* LineBreaks, int* LineLengths, int nMaxBreaks);
// Text formatting and parsing
virtual CString GXFormatText(const CGXStyle& style, LPCTSTR pszValue = NULL, unsigned nValueType = GX_VT_STRING, CGXGridCore* pGrid = NULL, CGXControl* pControl = NULL);
virtual BOOL GXDeval(LPCTSTR s, double *d, unsigned* pImportFormat = NULL, unsigned* pImportPlaces = NULL);
See "MacrosAndGlobals" reference for description of these methods.
See Also
GXDrawTextLikeMultiLineEdit GXDrawRotatedText GXGetMultiLineTextPosUnderPt GXGetMultiLineTextBreakCount GXComputeLineBreaks GXFormatText GXDeval
