L_PntDrawShapeEllipse

#include "LtPnt.h"

L_LTPNT_API L_INT L_PntDrawShapeEllipse(pPaint, UserDC, prcRect)

Draws an ellipse using the specified points.

Parameters

pPAINTHANDLE pPaint

Pointer to a paint handle.

L_HDC UserDC

Handle to a device context, such as a screen, to use as a display surface. This parameter can also be NULL. The mapping mode of the device context must be MM_TEXT.

const LPRECT prcRect

Pointer to a RECT structure that specifies the ellipses bounding rectangle.

Returns

Value Meaning
SUCCESS The function was successful.
< 1 An error occurred. Refer to Return Codes.

Comments

The ellipse will be drawn using the current shape properties. To determine the current shape properties, call L_PntGetProperty. To set or change the current shape properties, call L_PntSetProperty. For more information on the shape properties, refer to the PAINTSHAPE structure.

If UserDC is not NULL, the toolkit will paint the ellipse on the specified device context. If UserDC is NULL, the ellipse will not be painted on a device context.

If the UserDC is not NULL, the user should set the DC boundaries before calling this function, by calling L_PntSetDCExtents.

If a bitmap has been set using the L_PntSetMetrics function, the ellipse will be drawn on the specified bitmap. If UserDC is not NULL and a bitmap has been set using the L_PntSetMetrics function, then the ellipse will be drawn to both the device context and the bitmap.

Required DLLs and Libraries

See Also

Functions

Topics

Example

L_INT PntDrawShapeEllipseExample(HWND hWnd) 
{ 
   L_INT nRet; 
   pPAINTHANDLE pPaint ; 
   HDC          hDC; 
   PAINTSHAPE   shape; 
   RECT         rcShape; 
 
   /* Initiate the Paint toolkit */ 
   nRet = L_PntInit ( &pPaint ); 
   if ( SUCCESS != nRet ) 
   { 
      return nRet; 
   } 
 
   /* Get device context to draw on */ 
   hDC = GetDC ( hWnd ) ; 
 
   /* Get the current shape properties */ 
   nRet = L_PntGetProperty ( pPaint, PAINT_GROUP_SHAPE, &shape ) ; 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Set the required shape properties */ 
   shape.nSize             = sizeof ( PAINTSHAPE ) ; 
   shape.dwMask            = PSF_BORDERWIDTH    | 
                             PSF_BORDERSTYLE    | 
                             PSF_BORDERCOLOR    | 
                             PSF_BORDERENDCAP   | 
                             PSF_BACKGROUNDCOLOR; 
   shape.nBorderWidth      = 8 ; 
   shape.nBorderStyle      = PAINT_SHAPE_BORDER_STYLE_DOT ; 
   shape.crBorderColor     = RGB ( 255, 0, 255 ) ; 
   shape.nBorderEndCap     = PAINT_SHAPE_BORDER_ENDCAP_ROUND ; 
   shape.crBackgroundColor = RGB ( 255, 255, 0 ) ; 
 
   /* Set the new shape properties */ 
   nRet = L_PntSetProperty ( pPaint, PAINT_GROUP_SHAPE, &shape ) ; 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Set the coordinates with respect to the DC dimensions*/ 
   SetRect ( &rcShape, 10, 10, 210, 210 ) ; 
 
   /* Set the DC Extents */ 
   RECT rcClient; 
   GetClientRect(hWnd, &rcClient); 
   nRet = L_PntSetDCExtents ( pPaint, &rcClient ); 
 
   /* Use the current shape properties to draw an ellipse to the DC (hDC) */ 
   nRet = L_PntDrawShapeEllipse ( pPaint, hDC, &rcShape ) ; 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Release the device context */ 
   ReleaseDC ( hWnd, hDC ) ; 
 
   /* Free the paint tools handle */ 
   L_PntFree ( pPaint ) ; 
 
   return SUCCESS ; 
} 
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