2 Visual Components Manuals

then the field operates as before.
Bit No.
Dec.
Value
0 1 0x0001 Invisible
1 2 0x0002 Locked
2−13 16380 0x7FFC Reserved
14 16384 0x4000 HasFocus
15 32768 0x8000 EditActive
Hex Value Name Description
Introduction to Visual Components 2.3
This bit is set by the user (or control application) in order to
make the field invisible. If the bit is 0, the field will be displayed
normally.
The bit can be switched at any time. The picture is then
redrawn accordingly and the corresponding field is displayed
as either visible or invisible. The update occurs at a maximum
of once per second.
Input can be locked by setting this bit to 1. This function can be
used in place of or in addition to the normal password levels.
This setting is checked when the field is selected. In other
words, when the cursor moves over the field or it is touched
(touch screen).
This bit is only evaluated for input and touch−operated fields.
Other fields do not normally react to user input.
These bits are reserved for future updates and should be
initialized to 0 before starting the application. This ensures that
future updates will not have unwanted effects on the
application.
These bits cannot be changed or evaluated during runtime.
This bit is set to 1 by the editor when the input field is marked
as active (i.e. has the input focus). If another input field is
selected, then this bit is set back to 0.
Using this bit, the control application can determine which
input field has just been chosen by the user and can respond
accordingly. This could be useful for displaying appropriate
help text in a status bar, for example.
This bit is only set for input fields and is reserved for all other
fields.
This bit is set to 1 by the editor if the input field has been
opened for editing. It is reset to 0 when the input has been
completed. This allows a more exact determination of the
editing status of a field than would normally be possible using
only the completion address.
This bit can be evaluated in the control application, so that
variables which are acquired over a network (i.e. INA client
FBKs) can be synchronized accordingly.
If the bit changes from 0 to 1, the variable must be excluded
from being read so that it is not overwritten by the network
copy routine after editing.
When the bit is changed from 1 to 0, the variable must be
transferred (written) once to the remote station. The variable
can then be enabled again for reading.
This bit is only set for input fields and is reserved for all other
fields.
362 4.8.2.3 Application Possibilities