Starting the move point (with a mouse click):
two messages are sent, one before and one after the initial mouse click.
The nState field is set to STATE_BEGIN. The pt field contains the location
of the mouse click, in client coordinates.ANNMOVEPOINT (Document/Medical only)
typedef struct tagANNMOVEPOINT
{
L_UINT uStructSize;
L_INT nState;
POINT pt;
L_UINT uIndex;
ANNPOINT apt;
} ANNMOVEPOINT,*pANNMOVEPOINT;
The ANNMOVEPOINT structure contains information about an annotation object when moving a point of the object in automated mode.
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Member |
Description |
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uStructSize |
Size of the ANNCHANGEPARAM structure. Use sizeof(ANNCHANGEPARAM). |
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nState |
Value that indicates the state of the move. Possible values are: |
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Value |
Meaning |
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STATE_BEGIN |
[1] |
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STATE_UPDATE |
[2] |
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STATE_END |
[3] |
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pt |
Current move location (in client coordinates) |
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uIndex |
Index of the point (handle) being moved. The index can be used with other functions like the LAnnXXX::AddUserHandle, LAnnXXX::DeleteUserHandle, LAnnXXX::ChangeUserHandle, or LAnnXXX::EnumerateHandles functions, where LAnnXXX represents the classes that support handles. These classes are as follows: |
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LAnnAudioClip, LAnnButton, LAnnCrossProduct, LAnnCurve, LAnnCurveClosed, LAnnEllipse, LAnnEncrypt, LAnnFreehand, LAnnFreehandHotSpot, LAnnHilite, LAnnHotSpot, LAnnLine, LAnnNote, LAnnPolygon, LAnnPoint, LAnnPolyline, LAnnPolyRuler, LAnnProtractor, LAnnPointer, LAnnPushPin, LAnnRedact, LAnnRectangle, LAnnRTF, LAnnRuler, LAnnStamp, LAnnText, LAnnTextPointer, LAnnToolBar, LAnnVideo |
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apt |
Current location of point being moved, in container coordinates. |
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Comments
The ANNMOVEPOINT structure is part of the union of the ANNCHANGEPARAM structure. For more information, see the documentation for ANNCHANGEPARAM.
A handle of an annotation object can be moved in automated mode by dragging the handle with the mouse. Doing so causes a WM_LTANNEVENT message to be sent where wParam is ANNCHANGE_ ANNCHANGE_MOVE_POINT and lParam points to a structure of type ANNCHANGEPARAM. In this case, the union of ANNCHANGEPARAM is type ANNMOVEPOINT. This message is sent when one of the following events occurs:
Starting the move point (with a mouse click):
two messages are sent, one before and one after the initial mouse click.
The nState field is set to STATE_BEGIN. The pt field contains the location
of the mouse click, in client coordinates.
Moving the point of the object (by dragging
the mouse): Pairs of messages (one before and one after) are sent for
each mouse move. The nState field is set to STATE_UPDATE, and the pt field
contains the location of the mouse.
Ending the move point (by releasing the mouse):
One pair of messages is sent (one before and one after) for the mouse
up. The nState field is set to STATE_END, and the pt field contains the
location of the mouse when released.
See Also
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Topics: |