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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.
#include "ltwrappr.h"
virtual L_INT LImageViewerCell::ActionCallBack (phBitmapList, uCount, nAction, uMessage, wParam, ptMousePos);
An array of bitmap lists that represent all the bitmap lists of all cells selected by the user.
The number of bitmap lists referenced by phBitmapList.
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 (contiguous color) region |
| CONTAINER_ACTION_REGION_COLORRANGE | [19] Color range region |
| CONTAINER_ACTION_REGION_CIRCLE | [20] Circular region |
| CONTAINER_ACTION_REGION_SQUARE | [21] Square region |
| CONTAINER_ACTION_REGION_NUDGETOOL | [22] Nudge tool |
| CONTAINER_ACTION_REGION_SHRINKTOOL | [23] Shrink tool |
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_XBUTTONDOWN
WM_XBUTTONUP
WM_MOUSEMOVE
WM_MOUSEWHEEL
WM_RBUTTONDOWN
WM_RBUTTONUP
Additional message information.
A point that represents the position of the cursor.
| Value | Meaning |
|---|---|
| SUCCESS | The function was successful. |
| < 1 | An error occurred. Refer to Return Codes. |
A user-defined action is added to a container by calling LImageViewerCell::SetAction. 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 LImageViewerCell::EnableActionCallBack.
For an example, refer to LImageViewer::Create.