Sets the length of the tic mark of an ANNOBJECT_RULER or ANNOBJECT_POLYRULER. The tic marks are the perpendicular lines that measure the units.
L_LTANN_API L_INT L_AnnSetTicMarkLength(hObject, dLength, uFlags)
Handle to the annotation automation object.
The new length of the ruler object's tic mark.
Flags that determine which objects to process. Most of the flags apply only to container objects. You can combine values when appropriate by using a bitwise OR ( | ). The following are valid values:
|0||Process only the specified object.|
|ANNFLAG_SELECTED||[0x0001] Process only objects that have the selected property set to TRUE. For getting and setting the selected property, use the L_AnnGetSelected and L_AnnSetSelected functions.|
|ANNFLAG_NOTTHIS||[0x0004] Process only one level of objects within the specified container, not the container itself. If there are containers within the container, they are modified, but the objects within them are not.|
|ANNFLAG_RECURSE||[0x0008] Process objects within a container, and within any subcontainers, down to any level.|
|ANNFLAG_NOTCONTAINER||[0x0002] (Used with ANNFLAG_RECURSE) Process objects within containers, not the containers themselves.|
|ANNFLAG_NOINVALIDATE||[0x0010] Do not invalidate the affected rectangle in the window. Use this to avoid generating unwanted paint messages.|
|ANNFLAG_CHECKMENU||[0x0020] Process objects only if the ANNAUTOTEXT_MENU_TEXT menu item has been selected.|
|SUCCESS||The function was successful.|
|< 1||An error occurred. Refer to Return Codes.|
The tic mark length applies only to the following annotation objects:
dLength is expressed in pixels, not in points. The length is for the whole line, not just from the intersection point with the ruler to the end point of the tic mark it is from one end of the tic mark to the other end of the tic mark
Note that a ruler can have tic marks of different lengths. For Example, the ruler shown in the figure below has tic marks with several different lengths. In this case, dLength represents the length of the longest tic mark.
This example doubles the length of the tic mark of the hObject.
L_INT AnnSetTicMarkLengthExample(HANNOBJECT hObject)
nRet = L_AnnGetTicMarkLength(hObject, &dLength);
if (nRet == SUCCESS)
_stprintf_s(szMsg, TEXT("Old Tic Mark Length: %f\nNew Tic Mark Length %f"),
2 * dLength);
nRet = L_AnnSetTicMarkLength(hObject, 2 * dLength, 0);
if(nRet != SUCCESS)
MessageBox(NULL, szMsg, TEXT(""), MB_OK);
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