How can i rotate annotation 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, October 28, 2009 3:57:57 PM(UTC)

zzzkan

Groups: Registered
Posts: 8

Environment: Leadtools v16.5 document imaging C++ class Library, VS 2005. 

I load tif image in LAnnotationWindow and I create annotation objects. 

I want to rotate the annotaton objects with the image.

but annotation objects does not rotate when the Image is rotate.

How can i rotate all annotation objects with image ?


Please let me know.


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#2 Posted : Thursday, October 29, 2009 6:30:10 AM(UTC)

Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

Was thanked: 1 time(s) in 1 post(s)

Try to rotate the annotation objects with the image by using the LAnnotation::Rotate method. This method rotates the annotation object.
For more information, please see the following online help topic:
http://www.leadtools.com/Help/LEADTOOLS/v16/Main/CLIB/Lannotat/LAnnotation__Rotate.htm

Thanks,
Maen Badwan
LEADTOOLS Technical Support

#3 Posted : Sunday, November 1, 2009 3:51:28 PM(UTC)

zzzkan

Groups: Registered
Posts: 8

Thanks for reply.

i do rotate image and annotation objects using Rotate method as Following

//////////////////////////////////////////////////////

LAnnotationWindow LeadAnnWindow;
LAnnRectangle LeadRectangle;

CRect rect;
ANNRECT MyAnnRect;
ANNPOINT MyAnnPoint;

LeadAnnWindow.GetBitmapVisibleRect(&rect);
LeadRectangle.GetRect(&MyAnnRect);

MyAnnPoint.x = rect.left + rect.Width()/2;
MyAnnPoint.y = rect.top + rect.Height()/2;

LeadAnnWindow.Rotate(18000, ROTATE_RESIZE, 0);

m_AnnRect.Rotate(180, &MyAnnPoint);

/////////////////////////////////////////////////////////

But the result was not expected result.

i attached before and after rotation image

How can i rotate annotation object with the image?

zzzkan attached the following image(s):

#4 Posted : Sunday, November 1, 2009 10:35:16 PM(UTC)

Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

Was thanked: 1 time(s) in 1 post(s)

To resolve the problem, try to rotate the annotation object around the center of the LAnnotationWindow. Please try the same issue by using the following code:
+------------+
LAnnotationWindow LeadAnnWindow;
...
ANNPOINT MyAnnPoint;

MyAnnPoint.x = LeadAnnWindow.GetWidth()/2;
MyAnnPoint.y = LeadAnnWindow.GetHeight()/2;

LeadAnnWindow.Rotate(18000, ROTATE_BICUBIC, 0);

m_AnnRect.Rotate(180, &MyAnnPoint);
...
+------------+

Thanks,
Maen Badwan
LEADTOOLS Technical Support

#5 Posted : Sunday, November 1, 2009 11:16:37 PM(UTC)

zzzkan

Groups: Registered
Posts: 8

Thank you for your quick reply.

I have one more question.

In case rotation angle is 90, this way is applicable ?

#6 Posted : Monday, November 2, 2009 12:48:10 AM(UTC)

Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

Was thanked: 1 time(s) in 1 post(s)

Yes, the code should work correctly when the rotation angle is 90.
Please let me know if you face any problem.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

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