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LEADTOOLS Raster imaging C++ Class library help

Protractor Tool

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The Protractor annotation object (ANNOBJECT_PROTRACTOR) consists of two simple lines joined at a vertex to create an angle. With the automated functions, the first line of the protractor is started on a mouse-down event and completed on a second mouse-down event. The second line is completed on a third mouse-down event. Holding down the Shift key while drawing either of the two lines will draw the line at an angle that is a multiple of 45 degrees.

In design mode, click on the object with the right mouse button to do the following:

For information on flipping, reversing or rotating annotation objects, refer to Flipping, Reversing and Rotating Annotation Objects.

For low-level implementation details, refer to Protractor Annotation Object.

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