How to restrict the movement of Polygon object?

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Wednesday, January 14, 2009 7:19:29 PM(UTC)

makumar

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Posts: 23

Hi,

I am using Document Leadtool version 14.5.

I have drawn a Polygon having 4 points using annotation tool. I
can edit the Polygon by moving there points, & hence can change shape. I can also move the Polygon like drag - drop.

Editing of points is fine But what I want is to restrict the movement
of Polygon. Points can move but Polygon should not. Can anybody help me regarding this.
Very much thankful to you.

Regards,
Manoj Kumar


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#2 Posted : Thursday, January 15, 2009 9:07:01 AM(UTC)

Adnan Ismail

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Posts: 3,022

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You might be able to detect the annotation change event and prevent or undo moving the object.
Can you tell me which LEADTOOLS programming interface (DLL API, C++ Class Library, .NET , etc.) are you using?

#3 Posted : Thursday, January 15, 2009 6:39:56 PM(UTC)

makumar

Groups: Registered
Posts: 23

Hi Adnan,
Thanx for your reply.
I am using Delphi interface.
How I can prevent moving the object in annotation change event. Is there any method?

Regards,
Manoj Kumar

#4 Posted : Sunday, January 18, 2009 4:55:59 AM(UTC)

Adnan Ismail

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If you use our DLL API annotations function of LEADTOOLS 14.5 with Delphi, you can handle the WM_LTANNEVENT message and detect the ANNCHANGE_MOVE event and see when nState field is set to STATE_BEGIN. At that time, store the object location and when STATE_END arrives, restore the object to its original location.

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