L_AnnGetRotateAngle
#include "l_bitmap.h"
L_INT EXT_FUNCTION L_AnnGetRotateAngle(hObject, *pdAngle)
|
HANNOBJECT hObject; |
/* handle to the annotation object */ |
|
L_DOUBLE *pdAngle; |
/* pointer to a double that returns the rotate angle */ |
Gets the rotation angle for an annotation object. This function is available in the Document/Medical Toolkits.
|
Parameter |
Description |
|
hObject |
Handle to the annotation object. |
|
pdAngle |
Pointer to a double variable to be updated with the rotation angle. |
Returns
|
SUCCESS |
The function was successful. |
|
< 1 |
An error occurred. Refer to Return Codes. |
Comments
Call this function to get the rotation angle for a particular annotation object.
The angle is in radians, and uses the following convention.
The possible range of rotate values is (-Pi) ... (Pi)
A rotation in the clockwise direction is considered a positive rotation.
A rotation in the counter-clockwise direction is considered a negative rotation.
For example, if a rectangle is rotated 90 degrees in the counter clockwise direction, this function will get (-PI/2) for the rotation angle. If a rectangle is rotated 90 degrees in the clockwise direction, this function will get PI/2 for the rotation angle. If a rectangle is rotated 270 degrees in the counter clockwise direction, this is equivalent to 90 degrees in the clockwise direction so the rotation value returned is PI/2.
This function is only valid for the following annotation object types:
ANNOBJECT_POINTER:
ANNOBJECT_LINE:
ANNOBJECT_RULER:
ANNOBJECT_AUDIO:
ANNOBJECT_BUTTON:
ANNOBJECT_ELLIPSE:
ANNOBJECT_HILITE:
ANNOBJECT_HOTSPOT:
ANNOBJECT_NOTE:
ANNOBJECT_RECT:
ANNOBJECT_REDACT:
ANNOBJECT_STAMP:
ANNOBJECT_TEXT:
ANNOBJECT_VIDEO:
ANNOBJECT_PUSHPIN:
ANNOBJECT_ENCRYPT:
If the function is used with an object that is not listed, it returns SUCCESS with *pdAngle equal to 0.
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
Windows 95 / 98 / Me, Windows 2000 / XP.
See Also
Example
// This examples displays the rotate angle of the annotation hObject in radians and degrees
L_VOID ExampleAnnGetRotateAngle(HANNOBJECT hObject)
{
L_DOUBLE dAngle;
L_INT nRet;
L_TCHAR szMsg[200];
nRet = L_AnnGetRotateAngle(hObject, &dAngle);
if (nRet == SUCCESS)
{
wsprintf(szMsg, TEXT("Angle of rotation: Radians[%lf] Degrees[%f]\n"),
dAngle,
dAngle *180 / 3.1415926535
);
MessageBox(NULL, szMsg, TEXT(""), MB_OK);
}
}