DISPCONTAINERACTIONCALLBACK Callback Function

#include "ltivw.h"

L_INT pEXT_CALLBACK YourFunction(phBitmapList, uCount, nAction, uMessage, wParam, ptMousePos, pUserData)

HBITMAPLIST * phBitmapList;	/* array of bitmap lists */
L_UINT uCount;	/* number of bitmap lists */
L_INT nAction;	/* action ID */
L_UINT uMessage;	/* message */
WPARAM wParam;	/* extended parameter of the message */
POINT * ptMousePos;	/* mouse position */
L_VOID * pUserData;	/* user data */

This callback function is called each time the user clicks or drags the mouse, rotates the mouse wheel, or presses a keyboard button, if the mouse or keyboard event is associated with a user-defined action. This function is available only in the Medical Imaging Suite toolkits.

Parameter	Description
phBitmapList	An array of bitmap lists that represent all the bitmap lists of all cells selected by the user.
uCount	The number of bitmap lists referenced by phBitmapList.
nAction	Value that indicates the action associated with the mouse or keyboard event. Since this callback is used for user-defined actions, this value should be >= 100. Otherwise, it can be one of the following predefined actions:
	Value	Meaning
	CONTAINER_ACTION_WINDOWLEVEL	[1] Window leveling
	CONTAINER_ACTION_SCALE	[2] Scaling
	CONTAINER_ACTION_OFFSET	[3] Offset
	CONTAINER_ACTION_STACK	[4] Stacking
	CONTAINER_ACTION_MAG	[5] Magnifying glass
	CONTAINER_ACTION_ALPHA	[6] Alpha
	CONTAINER_ACTION_ANNOTATION_RULER	[7] Ruler annotation
	CONTAINER_ACTION_ANNOTATION_ANGLE	[8] Angle annotation
	CONTAINER_ACTION_ANNOTATION_TEXT	[9] Text annotation
	CONTAINER_ACTION_ANNOTATION_ARROW	[10] Arrow annotation
	CONTAINER_ACTION_ANNOTATION_RECTANGLE	[11] Rectangle annotation
	CONTAINER_ACTION_ANNOTATION_ELLIPSE	[12] Ellipse annotation
	CONTAINER_ACTION_ANNOTATION_HILITE	[13] Highlight annotation
	CONTAINER_ACTION_REGION_RECTANGLE	[14] Rectangular region
	CONTAINER_ACTION_REGION_ELLIPSE	[15] Elliptical region
	CONTAINER_ACTION_REGION_FREEHAND	[16] Free hand region
	CONTAINER_ACTION_REGION_POLYGON	[17] Polygon region
	CONTAINER_ACTION_REGION_MAGICWAND	[18] Magic wand region
	CONTAINER_ACTION_REGION_COLORRANGE	[19] Color range region
	CONTAINER_ACTION_REGION_CIRCLE	[20] Circular region
	CONTAINER_ACTION_REGION_SQUARE	[21] Square region
uMessage	Value that represents the message from either the mouse or the keyboard. Possible values are:
	WM_KEYDOWN
	WM_KEYUP
	WM_LBUTTONDOWN
	WM_LBUTTONUP
	WM_MBUTTONDOWN
	WM_MBUTTONUP
	WM_MOUSEMOVE
	WM_MOUSEWHEEL
	WM_RBUTTONDOWN
	WM_RBUTTONUP
wParam	Additional message information.
ptMousePos	A point that represents the position of the cursor.
pUserData	A void pointer that you can use to access a variable or structure containing data that your callback function needs. This gives you a way to receive data indirectly from the function that uses this callback function. (This is the same pointer that you pass in the pUserData parameter of L_DispContainerCreate) Keep in mind that this is a void pointer, which must be cast to the appropriate data type within your callback function.

Returns

SUCCESS	The function was successful.
< 1	An error occurred. Refer to Return Codes.

Comments

A user-defined action is added to a container by calling L_DispContainerSetAction. If a mouse or keyboard event that is associated with a user-defined action occurs, this callback function is called to allow the user to handle the action.

In order to use this callback function, it must first be set by calling L_DispContainerSetActionCallback.

Required DLLs and Libraries

LTIVW

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application.

Functions:	L_DispContainerSetTagCallBack, L_DispContainerGetTagCallBack, L_DispContainerSetActionCallBack, L_DispContainerGetActionCallBack, DISPCONTAINERTAGCALLBACK
Topics:	Applying Actions
	Image Viewer Functions: Callbacks
	Image Viewer Functions: Applying Actions