L_PntDrawShapePolyBezier

#include "LtPnt.h"

L_LTPNT_API L_INT L_PntDrawShapePolyBezier(pPaint, UserDC, pptPoints, nCount)

Draws a polybezier 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 LPPOINT pptPoints

Pointer to an array of POINT structures that contain the endpoints and control points of the curve(s).

L_INT nCount

Specifies the number of points in the pptPoints array. This value must be one more than three times the number of curves to be drawn, because each Bzier Bezier curve requires two control points and an endpoint, and the initial curve requires an additional starting point.

Returns

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

Comments

The Bezier curve(s) 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 Bezier curve(s) on the specified device context. If UserDC is NULL, the Bezier curve(s) will not be painted on a device context.

If a bitmap has been set using the L_PntSetMetrics function, the Bezier curve(s) 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 Bezier curve(s) will be drawn to both the device context and the bitmap.

Required DLLs and Libraries

See Also

Functions

Topics

Example

L_INT PntDrawShapePolyBezierExample(HWND hWnd) 
{ 
   L_INT nRet; 
   pPAINTHANDLE pPaint ; 
   HDC          hDC; 
   PAINTSHAPE   shape; 
   POINT        ptPolyBezier [5]; 
 
   /* 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 */ 
   L_PntGetProperty ( pPaint, PAINT_GROUP_SHAPE, &shape ) ; 
 
   /* Set the required shape properties */ 
   shape.nSize             = sizeof ( PAINTSHAPE ) ; 
   shape.dwMask            = PSF_BORDERWIDTH    | 
                             PSF_BORDERSTYLE    | 
                             PSF_BORDERCOLOR    | 
                             PSF_BORDERENDCAP   | 
                             PSF_BACKGROUNDCOLOR; 
   shape.nBorderWidth      = 2 ;  
   shape.nBorderStyle      = PAINT_SHAPE_BORDER_STYLE_DASH ;  
   shape.crBorderColor     = RGB ( 255, 0, 0 ) ; 
   shape.nBorderEndCap     = PAINT_SHAPE_BORDER_ENDCAP_FLAT ; 
   shape.crBackgroundColor = RGB ( 255, 255, 192 ) ; 
 
   /* set the new shape properties  */ 
   L_PntSetProperty ( pPaint, PAINT_GROUP_SHAPE, &shape ) ; 
 
   /* set the coordinates with respect to the DC dimensions*/ 
   ptPolyBezier [ 0 ].x = 10 ; 
   ptPolyBezier [ 0 ].y = 10 ; 
   ptPolyBezier [ 1 ].x = 150 ; 
   ptPolyBezier [ 1 ].y = 15 ; 
   ptPolyBezier [ 2 ].x = 100 ; 
   ptPolyBezier [ 2 ].y = 160 ; 
   ptPolyBezier [ 3 ].x = 70 ; 
   ptPolyBezier [ 3 ].y = 10; 
   ptPolyBezier [ 4 ].x = 20 ; 
   ptPolyBezier [ 4 ].y = 20 ; 
 
   /* Use the current shape properties to draw a polyBezier to the DC (hDC) */ 
   L_PntDrawShapePolyBezier ( pPaint, hDC, ptPolyBezier, 4 ) ; 
 
   /* Release the device context */ 
   ReleaseDC ( hWnd, hDC ) ; 
 
   /* Free the paint tools handle */ 
   L_PntFree ( pPaint ) ; 
 
   return SUCCESS ; 
} 
Help Version 22.0.2021.8.20
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© 1991-2021 LEAD Technologies, Inc. All Rights Reserved.