Bug? xCustomListView ScrollToItem not working

[Mike1970]

Hi, i'm trying to use the scrolltoitem function but when i call it, it doesn't show the last item totally.

See how the last message isn't displayed totally

 

[LucaMs]

Are you sure that the xCLV is not covered by the keyboard?

 

[Mike1970]

Are you sure that the xCLV is not covered by the keyboard?

Yes, do you see the gap between the Green and the Keyboard? i leaved it to understand exactly this thing.

Non capisco perchè faccia così (I don't understand why it behave like so)

 

[LucaMs]

The green part could be also under the keyboard, I cannot know if it is so.
Use Log to know the bottom of the xCLV and top of the keyboard.

 

[LucaMs]

Maybe you meant that "line" - I thought it was part of the keyboard; it's not so?

 

[Mike1970]

View attachment 86534

Maybe you meant that "line" - I thought it was part of the keyboard; it's not so?

The keyboard ends when the darker gray ends (red line), above it's my layout with a textview and a xclv on the top of it.

 

[LucaMs]

Well, I tried right now and ScrollToItem works as expected:

For i = 1 To 10
    xCLV.AddTextItem("Item # " & i, i * 11)
Next

xCLV.MultipleSelection = True  ' this in only in a my own custom xCustomListView :D
 
Sleep(1000)
 
xCLV.ScrollToItem(xCLV.Size - 1)

Check the top of your "input box" and the bottom of the xCLV (Logs).

 

[Mike1970]

Well, I tried right now and ScrollToItem works as expected:

For i = 1 To 10
    xCLV.AddTextItem("Item # " & i, i * 11)
Next

xCLV.MultipleSelection = True  ' this in only in a my own custom xCustomListView :D
 
Sleep(1000)
 
xCLV.ScrollToItem(xCLV.Size - 1)

Check the top of your "input box" and the bottom of the xCLV (Logs).

Have you tried with the Keyboard open?
I think the problem is with the resize

 

[LucaMs]

Have you tried with the Keyboard open?
I think the problem is with the resize

I did it, in a "chat activity".

It is a little complex - I mean its layout (because i use 2 layouts + 1 for items), otherwise I would post the layout and code of the Ime1_HeightChanged event, but it works.

In short, I change the xCLV height according to the new keyboard height and other views:

lmxclvChat.AsView.Height = ' ...

Then:

lmxclvChat.Base_Resize(lmxclvChat.AsView.Width, lmxclvChat.AsView.Height)

' other stuff

Sleep(10)
If lmxclvChat.Size > 0 Then
    lmxclvChat.JumpToItem(lmxclvChat.Size -1)
End If

Uhm... I used JumpToItem, not ScrollToItem, ma this shound not affect.

 

[Mike1970]

Ime1_HeightChanged

Are you using b4a?
Because i already done for Android... and it works .

im struggling for ios that doesnt work

 

[Mike1970]

Later I will upload a test example

 

[LucaMs]

Are you using b4a?
Because i already done for Android... and it works .

im struggling for ios that doesnt work

Yes, "unfortunately" I don't have B4i; and I hadn't seen that the question was in the B4i forum, sorry.

 

[Mike1970]

I tried to figure out whats wrong, but i didn't...
I think there is something that isn't working well in the library (@Erel).

I attach the example, you will notice that:
1. JumpToItem / ScrollToItem are working in a strange way (displaying the second-last and not the last one)
2. Drag all the items to the bottom (if the items doesn't fill the visible area)
3. The spacing between items increases if you don't scroll the view (to see the actual last one)

There are weird thing that are going one, i wish to understand if it's my fault or not...

 

[Erel]

1. The anchors in the layout are not set correctly. You can click on the "Check Anchors" button and see that the views are marked with red color.

2. Why are you calling clv.Base_Resize many times? Why do you need to resize its size at all?

 

[Mike1970]

1. The anchors in the layout are not set correctly. You can click on the "Check Anchors" button and see that the views are marked with red color.

2. Why are you calling clv.Base_Resize many times? Why do you need to resize its size at all?

Ok now the anchors are not red anyomore, i deleted a "Base_Resize" i didn't removed it by error. (I tried also with no Base_resize at all).
Nothing changed.

 

[Deleted member 103]

Hi @Mike1970 ,
change the code from so

Sub SendMex(Name As String, Text As String)
    Dim p As Panel
    p.Initialize("p")
    p.Top = 0
    p.Left = 0
    p.Color = Colors.Transparent
    
    Dim m As mex
    m.Name = Name
    m.Text = Text
        
    CustomListView1.Add(p, m)
    AggiustaAltezzaClv
End Sub

to so

Sub SendMex(Name As String, Text As String)
    Dim p As Panel
    p.Initialize("p")
    p.Top = 0
    p.Left = 0
    p.Color = Colors.Transparent
    
    Dim m As mex
    m.Name = Name
    m.Text = Text
        
    CustomListView1.Add(p, m)
    CustomListView1.JumpToItem(CustomListView1.Size - 1)
End Sub

 

[Mike1970]

Hi @Mike1970 ,
change the code from so

Sub SendMex(Name As String, Text As String)
    Dim p As Panel
    p.Initialize("p")
    p.Top = 0
    p.Left = 0
    p.Color = Colors.Transparent
    
    Dim m As mex
    m.Name = Name
    m.Text = Text
        
    CustomListView1.Add(p, m)
    AggiustaAltezzaClv
End Sub

to so

Sub SendMex(Name As String, Text As String)
    Dim p As Panel
    p.Initialize("p")
    p.Top = 0
    p.Left = 0
    p.Color = Colors.Transparent
    
    Dim m As mex
    m.Name = Name
    m.Text = Text
        
    CustomListView1.Add(p, m)
    CustomListView1.JumpToItem(CustomListView1.Size - 1)
End Sub

This is how the code was before writing the function.
Anyway, I will try. Maybe with all the test i’ve done i forget something

 

[Erel]

Example that might help you: https://www.b4x.com/android/forum/threads/b4x-cross-platform-chat-layout-example.112649/

 

[Mike1970]

Example that might help you: https://www.b4x.com/android/forum/threads/b4x-cross-platform-chat-layout-example.112649/

WOW. I only read the title and watched the video . Later i will test it. But form the video i think it's perfect.


P.s. Nice work with the forum!