LabWindows/CVI Idea Exchange

This topic has been discussed insome threads:

Unfortunately CVI doesn't support this feature, but LabVIEW probably does.

I think that CVI should implement this feature too, because grouping scalar variables into folders and subfolders is an approach commonly used by OPC Servers, and the Network Variables are a simple way to create an OPC Server with a CVI application.

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Hello,

I am glad that the event EVENT_MOUSE_WHEEL_SCROLL was added some time earlier to CVI. In principle, now it is possible to operate numeric controls, ring controls, etc. not only via keyboard and mouse, but also via the mouse wheel. This allows very smooth operations, great!

However, the integration level is inconsistent: While pressing the ARROW_UP key on a selected control will increase the value displayed in the control automatically, i.e. without the need of the programmer to react to a specific event, achieving the same result with the mouse wheel requires adding code to each callback. This is possible, but inconvenient as it adds a lot of overhead.

Right now, in every callback of a numeric or ring control that shall support the mouse wheel I have the following lines:

    switch ( event )
    {
        case EVENT_MOUSE_WHEEL_SCROLL:
            if ( eventData1 == MOUSE_WHEEL_SCROLL_UP )
            {
                FakeKeystroke ( VAL_UP_ARROW_VKEY );
            }
            else if ( eventData1 == MOUSE_WHEEL_SCROLL_DOWN )
            {
                FakeKeystroke ( VAL_DOWN_ARROW_VKEY );
            }

            break;
        case EVENT_VAL_CHANGED:
    ...

Hence I suggest

either to treat a mouse wheel on a selected control like an ARROW_UP or ARROW_DOWN keypress (personally preferred)
or to add one more attribute allowing to treat a mouse wheel on a selected control like an ARROW_UP or ARROW_DOWN keypress. In the UI editor, then there should be a checkmark (allow mouse wheel support), similar to the check marks initially dimmed etc. This attribute could be useful if there are concerns of backward compatibility - may be some users don't want to support the mouse wheel...

Thanks!

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Hello,

in the IDE of CVI it is possible to have both a toolbar and a status bar. Now if a file has been changed and could be saved, the disk icon is undimmed in both the status bar and the tool bar. For the tool bar, a single click is sufficient to save, while the status bar requires a double click.

While this double click behavior is true for all status bar actions (lock, unlock...), personally I would find it less irritating if the staus bar also would react on single clicks instead of double clicks.

Thanks for consideration,

Wolfgang

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Panels and controls scrollbars have fixed size (height for horizontal ones, and width for vertical ones) that can't be changed and doesn't reflect the Operating System setting (see attachment).

For tree control, for example, there is the option "Small/Medium/Large" but this isn't enough if you're designing an user interface for a touch screen panel, where you must drag scrollbars with your finger.

The custom scrollbars are built over a graph control, and are quite ugly, compared to the Visual Studio style...

I think a fully settable scrollbar size would be a great improvement...