the label bug


CVI 9.0 (and XP64 using a GUI generated by the GUI editor, a problem), occurs if the attribute ATTR_CTRL_MODE of a control is changed programmatically from VAL_HOT to VAL_INDICATOR. In the user interface, the control mode is set as HOT. The problem is that the position of the label is shifted to the left in mode INDICATOR. changing the value hot translates the (starting) position. This happens for the digital controls and ring (I have not tried others). Thus the offbeat label may overlap other controls.

I can't say if it is specific to the CVI 9.0, as usually, I build my controls programmatically. This time, I used the GUI editor for a faster test version...

Also, I found no opportunity to present such problems/bugs that this forum. Is this the right place?



Hi Wolfgang,.

It is perfectly acceptable to submit bug reports in this forum.

Floating labels are associated with the bulk of a control in a way such that when the part master changes position, the label is automatically repositioned. You see, for example, when you move a control and label moves with him. What happens when you change a digital or ring indicative control is that the inc/dec arrows on the left of the control disappear, and the entrance area of the control (which is the main part of control) grows to the left to fill the empty space. This movement to the left of this part of the command results in a label which is on the left side of the control (as opposed to, say, the top of the control) to also shift to the left in order to maintain the same distance from the main part. By the way. This does not happen only when you change the mode of control programmatically. You can also see if edit you in the editor.

The solution for this is to save the position of the label (ATTR_LABEL_LEFT) before changing the control mode and then set it to the same position, after having changed the command mode.

I agree entirely that there is a scenario in which most people would probably not consider the label to move, since the control as a whole is not really 'growing up '. But because the association between the label and a specific part of the control, and because this part is increasing, so this behavior occurs as a result.

Because this behavior has always existed, even if we considered undesirable, that we couldn't really change at this stage, from now on, it is very likely that there are programs that have come to rely on it and change the behavior would break backwards compatibility.

Tags: NI Software

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