L_AnnGetBoundingRect

#include "l_bitmap.h"

L_LTANN_API L_INT L_AnnGetBoundingRect(hObject, pRect, pRectName)

HANNOBJECT hObject;	handle to the annotation object
LPRECT pRect;	address of the variable to be updated
LPRECT pRectName;	address of the variable to be updated

Gets the bounding rectangle of the specified annotation object. This is the rectangle in which the object is displayed.

Parameter	Description
hObject	Handle to the annotation object.
pRect	Address of the variable to be updated with the annotation object's bounding rectangle. Pass NULL if you do not wish to retrieve this information.
pRectName	Address of the variable to be updated with the bounding rectangle of the name of the annotation object. Pass NULL if you do not wish to retrieve this information.

Returns

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

Comments

The bounding rectangle is different from the defining rectangle as follows:

The defining rectangle intersects the outermost points that define the object. If a line is more than one pixel wide, its defining points are in the middle of the line. Refer to the L_AnnGetRect function.
The bounding rectangle accounts for line width and is used as the rectangle to be invalidated when displaying an object. If the line width is an even number, the bounding rectangle is enlarged slightly to allow for variations in how the center of the line is defined on different systems.

Half the width of an object's outer line is outside its defining rectangle, as shown in the following diagram:

$image\bndrect.gif$

If the annotation object name is being displayed (see L_AnnSetNameOptions and L_AnnGetNameOptions for more information on annotation object names), it can appear far away from the annotation object itself. For this reason, a separate bounding rectangle for the annotation object name can be obtained by passing the address of a variable of data type RECT for the argument pRectName.

Required DLLs and Libraries

LTANN

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

This example displays the bounding rectangle for an annotation object, and the bounding rectangle for the annotation object's name.

L_INT AnnGetBoundingRectExample(HANNOBJECT hObject ) 
{ 
   L_INT nRet; 
   RECT     rcAnnObjectBounds; 
   RECT     rcAnnNameBounds; 
   L_TCHAR  szMsg[200]; 
   nRet = L_AnnGetBoundingRect(hObject, &rcAnnObjectBounds, &rcAnnNameBounds); 
   if(nRet != SUCCESS) 
      return nRet; 
   wsprintf(szMsg, TEXT("L_AnnGetBoundingRect\n\tObject Bounds[%d, %d, %d, %d]\n\tName Bounds[%d,%d,%d,%d]"), 
   rcAnnObjectBounds.left, rcAnnObjectBounds.top, rcAnnObjectBounds.right, rcAnnObjectBounds.bottom, 
   rcAnnNameBounds.left, rcAnnNameBounds.top, rcAnnNameBounds.right, rcAnnNameBounds.bottom); 
   MessageBox(NULL, szMsg, TEXT(""), MB_OK); 
   return SUCCESS; 
}

Help Version 19.0.2017.10.27

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LEADTOOLS Raster Imaging C API Help

Introduction

Version History

Getting Started

LEADTOOLS Raster Imaging Features

Redistributables/Files To Be Included With Your Application

Functions:	L_AnnBringToFront, L_AnnSendToBack,
	L_AnnSetRect, L_AnnGetRect, L_AnnSetPoints, L_AnnGetPointCount, L_AnnGetPoints
Topics:	Annotation Functions: Getting and Setting Geometric Properties
	Annotation Functions: Using Window Coordinates to Define an Object
	Implementing an Automated Annotation Program
	Implementing a Non-automated Annotation Program
	Obtaining Annotation Object Information