LAutomation::SetUndoLevel

#include "ltwrappr.h"

L_INT LAutomation::SetUndoLevel (uLevel);

Sets the automation undo level.

Parameters

L_UINT uLevel

An integer value that represents the maximum number of undo operations that can be performed in each container associated with the automation handle. The default value is DEF_AUTOMATION_UNDO_LEVEL [16].

Returns

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

Comments

The undo level determines the number of automation operations that can be done within an automation container. If the undo level is set to the default calue of DEF_AUTOMATION_UNDO_LEVEL [16], then each container associated with the automation handle has an undo level of 16.

To determine the current undo level, call LAutomation::GetUndoLevel.

To undo an automation operation, call LAutomation::Undo.

To determine whether an automation operation can be undone, call LAutomation::CanUndo.

For information about grouping multiple operations into a single undo process, refer to LAutomation::AddUndoNode.

Required DLLs and Libraries

See Also

Functions

Topics

Example

This example shows how to Get/Set the automation undo level.

L_INT LAutomation_SetUndoLevelExample(LAutomation  &lauto) 
{ 
   L_INT nRet; 
 
   nRet = lauto. IsValid (); 
 
   if ( SUCCESS == nRet ) /* check the validity of the automation handle */ 
 
   { 
 
      L_UINT uAutUndoLevel ; 
 
      /* get the current automation undo level */ 
 
      uAutUndoLevel = lauto.GetUndoLevel () ; 
 
      if ( 32 != uAutUndoLevel ) 
 
      { 
 
         /* set the automation undo level to 32 */ 
 
         nRet = lauto.SetUndoLevel (32 ) ; 
         if(nRet != SUCCESS) 
            return nRet; 
 
      } 
 
   } 
 
   else 
 
   { 
 
      return nRet ; 
 
   } 
 
   return SUCCESS; 
 
} 

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LEADTOOLS Container and Automation C++ Class Library Help
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