Expand/Collapse - PowerApps Nested gallery (Being able to expand multiple Nested-galleries at the same time)

[Linn93]

I have a PowerApps Canvas App with a gallery and a nested gallery / sub-gallery, using SharePoint as my data source.
I use a drilldown-Icon to expand the sub-gallery when I click on the drilldown-Icon. My problem is that I am only allowed to expand a single sub-gallery at a time. I need to be able to expand and collapse whichever sub-galleries I choose (i.e., expand multiple nested-galleries simultaneously).

Can anyone please help me solve this issue?

The formulas I use now where I'm only allowed to expand one single sub-gallery at a time is;

Drilldown-Icon (OnSelect): 

Select(Parent);Set(varGlrGoal, glrGoal.Selected.Goal)

Parent Gallery (items): 

Filter(FP_ForretningsplanerGoal, Forretningsplan = varRecord.Title)

Nested gallery / sub-gallery (items): 

SortByColumns(Filter(FP_ForretningsplanerInnhold, Goal = varGlrGoal), "Status0", Descending)

Nested gallery / sub-gallery (Height): 

If(CountRows(glrResultater.AllItems) > 0, CountRows(glrResultater.AllItems) * 90, 0)

[iAm_ManCat]

I cam point you in the right direction and I can point out why it is performing the way it is.

When your Parent gallery's drilldown item is selected, you are selecting that row within that gallery and then setting it to a variable, so every time you click another icon, you are selecting that particular row and setting the variable again, so it is resetting to the new selection.

I think if you instead started collecting the rows of the selected items into a collection (containing the row ID) and then had your sub-gallery based on whether a row's ID appeared within that collection then you could have expanding sub-galleries that remain open. Then have your drilldown icon OnSelect check if an item already exists in that collection by ID, if yes then remove it, otherwise add it to the collection.

[Linn93]

Thanks @iAm_ManCat,

I'm not sure if I understand exactly how I should create your recommendation, as I am quite new to PowerApps.
I attempted the following;

ParentGallery - Onselect:

if(countrows(filter(selectedResultaterID,glrGoal=ThisItem.glrGoal))=0,Collect(selectedResultaterID,{glrGoal:ThisItem.glrGoal}),Remove(selectedResultaterID,glrGoal=ThisItem.GlrGoal)))

NestedGallery-Height:

countrows(filter(selectedResultaterID,grlGoal=ThisItem.glrGoal))

And everything fails.
Not sure if I understand correctly what the row ID is? What is the correct variable for this? Are you able to help med with the approach to achieve this?

[iAm_ManCat]

Hi!

Every row in a SharePoint list or library has a unique row ID columns called "ID", so you can collect these to identify which specific row of data you are referring to, however you need a reference to that ID in any child lists by adding a column like ParentID to relate that row to, which I believe you have done the same thing with the 'goal' field in both lists..

Drilldown-Icon (OnSelect), changed to collect or remove items:

Select(Parent);
If(
   CountRows(
             LookUp(col_ParentGoals,Goal = glrGoal.Selected.Goal)
             =0
   ),

   // If not in collection then collect
   Collect(col_ParentGoals, glrGoal.Selected),

   // If already in collection then remove
   Remove(col_ParentGoals, glrGoal.Selected)
)

Parent Gallery (items), same as you had it: 

Filter( FP_ForretningsplanerGoal, Forretningsplan = varRecord.Title )

Nested gallery / sub-gallery (items), changed to check if that  Goal appears in the collection of Goals:  

SortByColumns(
              Filter(
                     FP_ForretningsplanerInnhold,
                     Goal in col_ParentGoals.Goal
              ),
              "Status0", 
              Descending
)

Nested gallery / sub-gallery (Height), same as you had it:

If(
   CountRows(glrResultater.AllItems) > 0,
   CountRows(glrResultater.AllItems) * 90,
   0
)

[Linn93]

Thank you so much for your help @iAm_ManCat ,

I attempted the formulas you suggested. It works except for the Drilldown-Icon (OnSelect).

Select(Parent);
If(
   CountRows(
             LookUp(col_ParentGoals,Goal = glrGoal.Selected.Goal)
             =0
   ),

   // If not in collection then collect
   Collect(col_ParentGoals, glrGoal.Selected),

   // If already in collection then remove
   Remove(col_ParentGoals, glrGoal.Selected)
)

The issue I'm facing is "Invalid argument type".

Do you have any idea what I might be doing wrong and how I can make it work?

[iAm_ManCat]

Yes, I think I misplaced a bracket on the 6th line, that should've been before the equals zero!

Select(Parent);
If(
   CountRows(
             LookUp(col_ParentGoals,Goal = glrGoal.Selected.Goal)
             )=0
   ,

   // If not in collection then collect
   Collect(col_ParentGoals, glrGoal.Selected),

   // If already in collection then remove
   Remove(col_ParentGoals, glrGoal.Selected)
)

[Linn93]

I'm still not able to make it work with the formula you suggested. The Issue I'm facing in the App Checker now are "Invalid argument type(Record). Expecting a Table value instead". 

Select(Parent);
If(
   CountRows(
             LookUp(col_ParentGoals,Goal = glrGoal.Selected.Goal)
             )=0
   ,

   // If not in collection then collect
   Collect(col_ParentGoals, glrGoal.Selected),

   // If already in collection then remove
   Remove(col_ParentGoals, glrGoal.Selected)
)

I tried with the following formula for the Drilldown-Icon (On select);

Select(Parent);
If(
    CountRows(
        Filter(
            col_ParentGoals,
            Goal = glrGoal.Selected.Goal
        )
    ) = 0,
    Collect(
        col_ParentGoals,
        {Goal: glrGoal.Selected.Goal}
    ),
    Remove(
        col_ParentGoals,
        Filter(
            col_ParentGoals,
            Goal = glrGoal.Selected.Goal
        )
    )
)

Which does work, and the issue in the "App checker" disappeared. But I'm still only able to expand one nested gallery at the time, and not multiple as I need it to be.

[Linn93]

I'm still not able to make it work with the formula you suggested. The Issue I'm facing in the App Checker now are "Invalid argument type(Record). Expecting a Table value instead". 

Select(Parent);
If(
   CountRows(
             LookUp(col_ParentGoals,Goal = glrGoal.Selected.Goal)
             )=0
   ,

   // If not in collection then collect
   Collect(col_ParentGoals, glrGoal.Selected),

   // If already in collection then remove
   Remove(col_ParentGoals, glrGoal.Selected)
)

I tried with the following formula for the Drilldown-Icon (On select);

Select(Parent);
If(
    CountRows(
        Filter(
            col_ParentGoals,
            Goal = glrGoal.Selected.Goal
        )
    ) = 0,
    Collect(
        col_ParentGoals,
        {Goal: glrGoal.Selected.Goal}
    ),
    Remove(
        col_ParentGoals,
        Filter(
            col_ParentGoals,
            Goal = glrGoal.Selected.Goal
        )
    )
)

Which does work, and the issue in the "App checker" disappeared. But I'm still only able to expand one nested gallery at the time, and not multiple as I need it to be.

[Linn93 · Accepted solution]

I just wanted to update this post.

I figured out the solution on how to expand multiple nested galleries simultaneously.

I did the following;

Drill-down-Icon (On select):

Select(Parent); If( CountRows( Filter( col_ParentGoal, Goal = glrGoal.Selected.Goal ) ) = 0, Collect( col_ParentGoal, {Goal: glrGoal.Selected.Goal} ) )

Drill-down-Icon (Visible):

!drillUpIcon.Visible

Drill-UP-Icon (On select);

Select(Parent); Remove( col_ParentGoal, Filter( col_ParentGoal, Goal = glrGoal.Selected.Goal) )

Drill-UP-Icon (Visible):

If(ThisItem.Goal in col_ParentGoal, true, false)

Parent Gallery (items):

Filter(FP_ForretningsplanerGoal, Forretningsplan = varRecord.Title)

Nested gallery / sub-gallery (items):

SortByColumns( Filter( FP_ForretningsplanerInnhold, Goal in col_ParentGoal, Goal = lblGoal.Text ), "Status0", Descending )

Nested gallery / sub-gallery (Height):

If(CountRows(glrResultater.AllItems) > 0, CountRows(glrResultater.AllItems) * 64, 0)

Nested gallery / sub-gallery (Visible):

If(ThisItem.Goal in col_ParentGoal, true, false)

Thank you @iAm_ManCat, I wouldn't have figured out the solution without your help.