LRasterPaint::FillSurface

#include "Ltwrappr.h"

L_INT LRasterPaint::FillSurface(UserDC, pptPoint)

Fills an area, starting at a specified point and continuing in all directions, that contains a specified color and some tolerance.

Parameters

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.

LPPOINT pptPoint

Pointer to a POINT structure that the toolkit will use as a starting point to fill the area. This color present at this point will specify the surface color.

Returns

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

Comments

The filling procedure will be carried out using the current fill properties. To determine the current fill properties, call LRasterPaint::GetProperty. To set or change the current fill properties, call LRasterPaint::SetProperty. For more information on the fill properties, refer to the PAINTFILL structure.

Within the PAINTFILL structure, upper and lower tolerance values can be set for the border color specified in crBorderColor. For example, if the border color passed to this function has an RGB value of 40, 40 , 200, and the lower tolerance and upper tolerance set in the PAINTFILL structure are 10, 10, 10, and 5, 5, 5, respectively, then this function will recognize colors from 30, 30, 190 to 45, 45, 205 as the border color.

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

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

The images below show an example of the results of calling LRasterPaint::FillSurface.

image\g7.gif
image\g8.gif

Required DLLs and Libraries

See Also

Functions

Topics

Example

L_INT LRasterPaint_FillSurfaceExample( CWnd* pWnd )  
{ 
   L_INT          nRet; 
   LRasterPaint   rstp; 
   CDC*           pDC = pWnd->GetDC( ) ; 
   PAINTSHAPE     shape ;  
   RECT           rcShape ; 
   RECT           rcDCExtents ; 
   POINT          ptFill ; 
 
   /* Initiate the Paint toolkit */ 
   nRet = rstp.Initialize (); 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Get the current shape properties */ 
   nRet = rstp.GetProperty (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 = rstp.SetProperty (PAINT_GROUP_SHAPE, &shape ) ; 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Set the coordinates with respect to the DC dimensions*/ 
   SetRect ( &rcShape, 10, 10, 210, 210 ) ; 
 
   /* Get the destination DC dimensions */   
   pWnd->GetClientRect ( &rcDCExtents ) ; 
 
   /* Set the toolkit user DC extents */ 
   nRet = rstp.SetDCExtents ( &rcDCExtents ) ; 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Use the current shape properties to draw an ellipse to the DC (hDC) */ 
   nRet = rstp.DrawShapeEllipse ( pDC->m_hDC, &rcShape ) ; 
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Set the fill start point */ 
   ptFill.x = 100 ; 
   ptFill.y = 100 ; 
  
   /* Fill the target area */ 
   nRet = rstp.FillSurface ( pDC->m_hDC, &ptFill ) ;  
   if(nRet != SUCCESS) 
      return nRet; 
 
   /* Free the paint tools handle */ 
   nRet = rstp.Free ( ) ; 
   if(nRet != SUCCESS) 
      return nRet; 
 
   pWnd->ReleaseDC( pDC ) ; 
 
   return SUCCESS ; 
} 
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