LBitmapRgn::SetRgnRoundRect

#include "ltwrappr.h"

virtual L_INT LBitmapRgn::SetRgnRoundRect(pRect, nWidthEllipse, nHeightEllipse)

LPRECT pRect;	pointer to the bounding rectangle of the region
L_INT nWidthEllipse;	width of the ellipse used for rounded corners
L_INT nHeightEllipse;	height of the ellipse used for rounded corners

Creates or updates the associated class object's bitmap region by adding a rounded rectangular region.

Parameter	Description
pRect	Pointer to the windows RECT structure that specifies the bounding rectangle of the region. You specify the structure using device context coordinates, and LEADTOOLS translates the coordinates using the values set using LBitmapRgn::SetRgnXForm.
nWidthEllipse	The width of the ellipse that describes the arc of the rounded corners. You specify the measurement in device context pixels, and LEADTOOLS translates the coordinates using the values set using LBitmapRgn::SetRgnXForm.
nHeightEllipse	The height of the ellipse that describes the arc of the rounded corners. You specify the measurement in device context pixels, and LEADTOOLS translates the coordinates using the values set using LBitmapRgn::SetRgnXForm.

Returns

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

Comments

To update an existing region, you specify how the new region is to be combined with the existing one. For descriptions of the possibilities, refer to Creating a Bitmap Region.

The following illustration shows how you describe the rounded corners by specifying the width and height of an ellipse:

$image\rndrect.gif$

Required DLLs and Libraries

LTDIS

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Platforms

Win32, x64.

Example

#define MAKE_IMAGE_PATH(pFileName) TEXT("C:\\Users\\Public\\Documents\\LEADTOOLS Images\\")pFileName 
L_INT LBitmapRgn__SetRgnRoundRectExample(HWND hWnd) 
{ 
   L_INT nRet; 
   POINT pointRgn ; 
   LBitmapBase MyBitmap(200,300,ORDER_BGR); 
   RECT Rect={10,10,350,400}; 
   nRet = MyBitmap.Load(MAKE_IMAGE_PATH(TEXT("image1.cmp"))); 
   if(nRet !=SUCCESS) 
      return nRet; 
   LBitmapRgn Region(&MyBitmap); 
   //set the round rect as a region 
   nRet =Region.SetRgnRoundRect(&Rect,30,40); 
   if(nRet !=SUCCESS) 
      return nRet; 
   // check if this point in region or not 
   if (Region.IsPtInRgn(150,200) == TRUE) 
      MessageBox(hWnd, TEXT("Point in region"), TEXT("Region"), MB_OK ); 
   else 
      MessageBox(hWnd, TEXT("Point is not in region"), TEXT("Region"), MB_OK ); 
   // set x & y in pointRgn structure 
   pointRgn.x = 100 ; 
   pointRgn.y = 100 ; 
   // check if this point in region or not 
   if (Region.IsPtInRgn(&pointRgn) ==TRUE) 
      MessageBox(hWnd, TEXT("Point in region"), TEXT("Region"), MB_OK ); 
   else 
      MessageBox(hWnd, TEXT("Point is not in region"), TEXT("Region"), MB_OK ); 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C++ Class Library Help

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Classes and Member Functions

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Summary of Features

Functions:	LBitmapRgn::SetRgnColor, LBitmapRgn::SetRgnEllipse, LBitmapRgn::SetRgnPolygon, LBitmapRgn::SetRgnRect, LBitmapRgn::SetRgnColorHSVRange, LBitmapRgn::SetRgnColorRGBRange, Class Members
Topics:	Raster Image Functions: Creating and Using a Region
	Raster Image Functions: Region Processing
	Defining and Using a Bitmap Region
	Saving a Region