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LAnnPolygon::PopFixedState

#include "ltwrappr.h"

virtual L_INT LAnnPolygon::PopFixedState(uFlags)

flags that determine which objects to process

Re-enables the fixed state of an annotation.

Parameter	Description
uFlags	Flags that determine which objects to process. Most of the flags apply only to container objects. You can combine values when appropriate by using a bitwise OR ( \| ). The following are valid values:
	Value	Meaning
	0	Process only the specified object.
	ANNFLAG_SELECTED	[0x0001] Process only objects that have the selected property set to TRUE. For getting and setting the selected property, use the LAnnotation::IsSelected and LAnnotation::SetSelected functions.
	ANNFLAG_NOTTHIS	[0x0004] Process only one level of objects within the specified container, not the container itself. If there are containers within the container, they are modified, but the objects within them are not.
	ANNFLAG_RECURSE	[0x0008] Process objects within a container, and within any subcontainers, down to any level.
	ANNFLAG_NOTCONTAINER	[0x0002] (Used with ANNFLAG_RECURSE) Process objects within containers, not the containers themselves.
	ANNFLAG_NOINVALIDATE	[0x0010] Do not invalidate the affected rectangle in the window. Use this to avoid generating unwanted paint messages.
	ANNFLAG_CHECKMENU	[0x0020] Process objects only if the ANNAUTOTEXT_MENU_TEXT menu item has been selected.

Returns

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

Comments

This function re-enables the fixed state of one or more annotations. It is to be called after the fixed state as been temporarily disabled by a call to LAnnPolygon::PushFixedState.

Fixed annotations are independent of the annotation container scalarX, scalarY, offsetX and offsetY properties. The result is that they do not scroll or move with the underlying image. For more information, refer to LAnnotation::SetScalarX, LAnnotation::SetScalarY, LAnnotation::SetOffsetX, and LAnnotation::SetOffsetY.

In some instances, however, it is necessary to display a fixed annotation at a larger or smaller size than its fixed size. For example, when using the magnifying glass on a fixed annotation, the annotation needs to be painted larger than normal.

To accommodate, call LAnnPolygon::PushFixedState on the fixed annotation before the magnifying glass paint. After the paint, call LAnnPolygon::PopFixedState to restore the annotation objects fixed state.

Typically, you would call LAnnPolygon::PushFixedState / LAnnPolygon::PopFixedState on the root annotation container, passing ANNFLAG_RECURSE to temporarily disable the fixed state of ALL annotation objects.

Calls to LAnnPolygon::PushFixedState and LAnnPolygon::PopFixedState are maintained internally as a stack. This means that nested calls will behave properly. For example,

	LAnnPolygon::PushFixedState ();	Fixed state is temporarily disabled
	LAnnPolygon::PushFixedState ();	Fixed state is temporarily disabled
	LAnnPolygon::PopFixedState ();	Fixed state is still disabled
	LAnnPolygon::PopFixedState ();	Fixed state is enabled

Note that LAnnPolygon::PushFixedState and LAnnPolygon::PopFixedState should always be called in pairs.

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 enables the "fixed" property of all objects in the container that
have been temporarily disabled with a call to LAnnPolygon::PushFixedState.
For an example using the magnifying glass, see the source code
for the main Class Library annotation demo.

L_INT LAnnPolygon_PopFixedStateExample(LAnnPolygon *pLPolygon)  
{ 
	L_INT nRet; 
 
   nRet = pLPolygon->PopFixedState(ANNFLAG_RECURSE | ANNFLAG_NOINVALIDATE);  
 
	return nRet; 
 
}

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Summary of Features

Functions:	Class Members, LAnnPolygon::SetFixed, LAnnPolygon::PushFixedState, LAnnPolygon::GetFixed, LAnnPolygon::IsFixedInRect
Topics:	Annotation Functions: Object Properties
	Implementing Annotations
	Automated User Interface for Annotations
	Annotation Functions: Creating and Deleting Annotations
	Types of Annotations
	Annotation Functions: Implementing Custom Annotations
	Annotation Functions: Creating Custom Annotations
	Fixed Annotations
	Minimizing Flicker With Double Buffering