LabVIEW Idea Exchange

I find often the need of creating array indicators with many elements, and of labelling them is a way which allows easy identification of the element index.

Normally the labels of the elements can be made visible, like in the left example shown:

One way of doing it, if the array has a fixed size, and all of the array is shown at once, is to juxtapose a set of text labels identifying the elements. Tedious to build.

If the array changes size, if it is larger than shown, if it is supposed to be scrolled on the FP, static labels are useless. Currently the label of the element can be made visible, but all elements share the same label. The index display of the array can be shown, but it relates to a single element, which makes cumbersome to identify elements of long arrays.

I usually resort to more sophisticate contraptions, like arrays of clusters, each composed of the element in question and of a numeric indicator; or to two parallel array indicators, one for the elements itself and one for the indices. Both solutions are more cumbersome to build and to size and align equally; the index content has to be prefilled and maintained in sync when array elements are added or deleted (programmatically or via contextual menu); in the second case, a lot of events have to be trapped programmatically, for instance to maintain synchronism when the main array is scrolled.

What I would like to have is an additional label natively visible, showing the element index, like on the right.

The labels could be made optionally visible with a contextual menu ---- left click->visible items->index label.

Options (perhaps properties) in order to set the value of the first element (e.g. 0 or 1 or any other value) and the step value if different than 1 would also be useful. Standard options about location and orientation of the label with respect to the array element would apply.

tl;dr  There's a summary at the bottom if this is too long for you.

Quick Drop is pretty useful when it comes to dropping things and the fact that it also gets items from the project is great.

What I don't like about QD, however, is the keyboard shortcuts. These allow you to perform custom actions in LV and the concept itself is great, but the implementation QD uses has some issues which other similar tools like the right-click framework and LabVIEW Speak don't have, such as the items in the following list.

The problems:

• It requires you to remember keyboard combos to call the plugins. That's great as a secondary access mechanism, but is terrible as a main one for a few reasons:
1. It is not discoverable.
2. It requires you to remember key combos.
3. It doesn't work if you want a longer list of macros which perform all kinds of useful operations, because you run out of available shortcuts.
4. Likewise, you have shortcut collisions, because people want to use the same shortcut for different plugins, so you might say "Ctrl+T", and it will mean something else to the person you're talking to.
• Setting options on the plugins is done by pressing the Shift key or other similar magic combos instead of having a clear representation in the user interface.

So, what can we do about it?

I think a good first step would be to stop thinking of these as "keyboard shortcuts". They should be thought of as custom actions or macros and they should simply appear in the list
along with the regular items, like so:

There are a few things to point out in this image:

• The actions appear in the list using their full names and they have a glyph to set them apart from the other items.
• The actions may (or may not) have a shortcut.
• The actions may (or may not) have a keyboard shortcut (and there's no reason in principle why regular items can't have them too). This solves the existing problem of the shortcut limit - you only assign shortcuts to actions you access regularly, just like you can already do today with menu items.
• There's a ring on the bottom which shows just the items, just the actions, or both. Ideally, the value of this ring would also be settable by other means (e.g. open QD using Ctrl+Shift+Space and the list only shows the actions or open QD when you have a selection and the list only shows the actions).

OK, so that's step one and it solves the first issue - the actions are discoverable, accessible and not limited in number.

Now step two - some of you may have noticed that the image has another new thing - there's an expand button on the right side.
Clicking that button will open this panel:

This area shows the details of the currently selected action and allows selecting options for it.

Here's what we see in this example:

• A title.
• A description.
• An image.
• In the settings area, I gave the "Build array of references" action an option - you can choose to align the Build Array node to the center, the top or the bottom of the references.

The panel should remember its last open setting between calls and when it's open, it should work asynchronously, so that it doesn't delay the operation of QD.
For the VIs which appear in the panel, there should be a standard template for loading and saving values, for showing titles and help data and for shutting down. If the VI fails to respond to the shutdown command within N ms, Quick Drop should proceed and not wait for it.

Of course, once we have this panel, the next logical step is to also have it show the help for standard items, similar to this idea:

So, to sum up:

1. Custom actions should be in the list of Quick Drop items.
2. Shortcuts for actions and items should be fully customizable. That means that you can still use keyboard shortcuts to call the actions, just like today.
   
3. There should be a panel which allows customizing options for actions and show the help for regular items.

Check out this nice readable diagram:

Whoa there pardner, not so fast. The control reference labeled "Numeric 1" is actually linked to the "Numeric 3" control. And the property node labeled "Numeric 2" is actually linked to the "Numeric 1" control. Etc., etc.

I see no reason to change the labels of Control References and Implicit Property/Invoke Nodes. If you need to document them beyond their label, attach a free label to them. We don't allow changing the labels of subVIs, so the precedent has been set. For the sake of diagram readability, we shouldn't allow changing labels of these objects either.