|
Consider using the well-designed icons in the LabVIEW NXG libraries as prototypes for your icon.
|
Recommended
|
If you cannot find or create a picture to use for an icon, you can use text.
|
N/A
|
|
Create a uniform icon style for all related VIs.
|
Recommended
|
A uniform style helps users visually determine which subVIs are associated with a top-level VI.
|
N/A
|
|
Avoid using colloquialisms when making icons.
|
Recommended
|
Colloquialisms, even in pictures, are difficult to translate. Users that speak languages other than English may not understand a picture that relies on cultural background knowledge.
|
If you represent a data logging VI with a picture of a lumberjack, some users may not know the cultural reference to understand how a lumberjack can represent data logging.
|
|
Create a meaningful icon for every VI.
|
Recommended
|
The icon represents the VI on a palette and diagram. Well-designed icons help users gain a better understanding of the subVI without the need for excess documentation.
|
N/A
|
|
Consider common node sizes in LabVIEW NXG when designing an icon.
|
Recommended
|
Refer to the following common node sizes:
-
30x30 for small nodes. This size supports the 3-1-1-3 connector pane pattern.
-
40x40 for the default VI size. This size supports the 4-2-2-4 connector pane pattern.
-
50x50 for the default size used by NI hardware driver and Advanced Analysis Library APIs. This size supports the 5-3-3-5 connector pane pattern.
|
Refer to the following example icons and sizes:
|
|
Make sure to set inputs and outputs for each subVI as required, recommended, or optional in the connector pane for that subVI, and make sure the settings make sense for your project.
|
Recommended
|
Use the
Usage
settings on the
Item
tab for the connector panes of all subVIs to specify the input and output settings for each subVI.
The
Usage
setting for connector pane terminals affects the appearance of the inputs and outputs in the
Context Help
and reminds users to wire subVI connections.
Use the required setting for inputs that users must wire for the subVI to run properly. Use the optional setting for inputs that have default values that are appropriate for the subVI the majority of the time. Use the recommended setting for all other inputs.
|
N/A
|
|
Assign inputs and outputs according to the way a user will eventually wire VIs together.
|
Recommended
|
Wire inputs on the left and outputs on the right of the connector pane because standard data flow moves from the left to the right.
Consistency between the location you assign inputs and outputs in the connector pane and their location in the actual data flow promotes ease of use and reuse.
|
-
If you create a group of subVIs that you often use together, give the subVIs a consistent connector pane with common inputs in the same location to help you remember where to locate each input.
-
If you create a subVI that produces an output that another subVI uses as an input, such as references, task IDs, and error clusters, align the input and output connections to simplify the wiring patterns.
-
Assign two inputs of a VI to the left two terminals of the corresponding connector pane and two outputs of that VI to the right two terminals of the corresponding connector pane.
|
|
Reserve the bottom left and right connector pane terminals for the error input and error output.
|
Recommended
|
Session-based APIs are the only exception to this recommendation. For session-based APIs, you can place error inputs and outputs directly beneath session and reference inputs and outputs.
|
N/A
|
|
Avoid creating connector panes with more than 16 terminals.
|
Recommended
|
Including too many terminals can make a subVI difficult to understand. You can consider either splitting the functionality of the subVI into multiple subVIs or using clusters to create logical groupings of the inputs to the subVI, depending on which solution makes sense for your project.
|
N/A
|
|
If your subVI includes a pass-through input and output pair, add an
in
suffix to the control and an
out
suffix to the indicator.
|
Recommended
|
Adding these suffixes to pairs of inputs and outputs indicates a relationship between the inputs and outputs.
|
If you name an input reference
in, name the related output reference
out.
|
|
If your subVI includes a pass-through input and output pair, and you wire the control directly to the indicator on the diagram to prevent the value from changing, remove the indicator from the connector pane.
|
Recommended
|
You can exclude references from this guideline.
|
N/A
|
