LBase::EnableCallBack

Summary

Enables or disables the callback functions.

Syntax

#include "ltwrappr.h"

L_BOOL LBase::EnableCallBack (bEnable)

Parameters

L_BOOL bEnable

Flag that indicates whether to enable or disable the callback functions. Possible values are:

Value Meaning
TRUE Enable the callback functions.
FALSE Disable the callback functions.

Returns

The previous setting.

Comments

Call this function to enable or disable the callback overridable functions for your class object. This will enable or disable the callback functions which exist in the calling object. Other objects will not be affected by this function. All LEADTOOLS C++ Class Library classes use this setting to enable or disable the various callback functions which exist in classes derived from LBase.

Required DLLs and Libraries

Platforms

Win32, x64.

See Also

Example

L_INT LBase__EnableCallBackExample() 
{ 
	L_INT nRet; 
	LBitmap MyBitmap, Bitmap2; 
 
	nRet = Bitmap2.Load(MAKE_IMAGE_PATH(TEXT("Image1.cmp")),24);  //load the bitmap at 24 bitsperpixel 
	if(nRet != SUCCESS) 
		return nRet; 
 
	if(MyBitmap.IsCallBackEnabled()==FALSE) 
		MyBitmap.EnableCallBack(TRUE); 
 
	//since the callback functions are enabled for MyBitmap object then  
	//LBitmapBase::ColorResBitmapCallBack() function for this object will be called repeatedly  
 
	nRet = MyBitmap.ColorRes(Bitmap2, 8);  
	if(nRet != SUCCESS) 
		return nRet; 
 
	return SUCCESS; 
}
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