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.
Member | Description | |
uStructSize | Size of the ANNCHANGEPARAM structure. Use sizeof(ANNCHANGEPARAM). | |
nState | Value that indicates the state of the move. Possible values are: | |
Value | Meaning | |
STATE_BEGIN | [1] | |
STATE_UPDATE | [2] | |
STATE_END | [3] | |
pt | Current move location (in client coordinates) | |
uIndex | Index of the point (handle) being moved. The index can be used with other functions like L_AnnGetUserHandle, L_AnnChangeUserHandle, L_AnnDeleteUserHandle, and L_AnnEnumerateHandles. | |
apt | Current location of point being moved, in container coordinates. |
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.
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