Deselect GridView Item

Questions
#1

Hi,
I have a gridview that is fed its contents (ItemsSource) through an attribute payload i.e. @Device.SupportedMenuItems. It then has a SelectedValue bound to an attribute @Device.MenuItem. It works great. Click an item, it pushed the value into MenuItem, which triggers stuff.

Here’s my problem. It also “selects” that item. Which means I can’t click it again. So I’d really like to deselect the item immediately after it does its stuff.

How might I do this? My system has no knowledge of the items in ItemsSource as they are fed by MQTT.

Hope that makes sense.
Thanks.

#2

Try clearing the MenuItem attribute after you send the command. Writing something to that attribute should trigger a refresh to the GridView & clear your selection. If that doesn’t work, I might have to look at maybe adding a new property to the control so it doesn’t retain the selection.

1 Like
#3

Hi,

just getting back into HR and am stuck implementing the above suggestion.

  1. in an onchange event of my plugin, I have tried device.MenuItem="" - but that does nothing.
  2. I tried creating a datatrigger in the control itself, that gets triggered by Binding @Device.MenuItem with a value of .*, but the only thing I can set in Setters is the GridView properties…so I tried setting, SelectedValue to “”, but that does nothing too.

I’m sure I’ve just forgotten what to do!

Help!

#4

Instead of an empty string try an actual value like say “Unknown” or “-1”.

Also, I do not know if any of this will work. The control was designed to be a selection control. I’m just giving you things to try. As I said, I may have to add a new property to change the behavior of it.

#5

Hi,

Tried that. Didn’t work. But I should be able to set device.MenuItem in my plugin OnChange code - shouldn’t I? Or maybe the value isn’t set until that function is completed.
mmh if that’s the case, then maybe returning “false” from OnChange, should stop the variable assignment (just tried it - didn’t work – but my an idea?).

s.

#6

Whichever way you think is best would be great. I can’t think of a workaround!

#7

I will look into it. I don’t know that I have a workaround for you either at this time.

#8

Thanks. By the way – is there an equivalent of “setTimeout” available.
I am wondering if I could trigger a setTimeout (i.e. non blocking delay) and reset the device.MenuItem variable.
Thx Bill.

#9

There is not “setTimeout” or an equivalent. I’ll try to find you a solution next week.

#10

I looked into this a little closer & the way this is currently set up is that the GridView will retain the selected value for 30 seconds. After 30 seconds it’ll revert back to the actual value & assume the request failed.

This behavior is bypassed for capabilities that are command only, no state information. If you use the MediaControl capability and its SupportedMediaCommands & MediaCommand attributes you should get the behavior you desire.