Dynamically Created Tables on a Scrollarea - random artefacts after scrolling

[seany]

Hi

So, with my continuing project, I can do this now :



But If I scroll it, sometimes, the location of the last edited cell randomly gets stuck, i.e. does not scroll with the rest of the system.

I have marked a special case with 3 blue arrows, where a copy of the text stay in its position where the cell was before the scrolling happened. In addition, a new copy in the correctly scrolled position also appeared. But note that this copy at the correct location is not always appearing. Sometimes, only the copy in the old place before scrolling remains.

It seems that the Edit controls for tableview often does not work.

None the less, I add my code in attachment.
Any help will be appreciated. Thank you

[BruceSteers]

Are you using the latest gambas?

[BruceSteers]

I don't want to sound harsh but your code is pretty bad in places.
from the very first line..

Public parentTable As New TableView(elementTraningForm)

considering parentTable gets used later as..

Public Sub Dyntable_root_ColumnClick(c As Integer)
  parentTable = Last
End

Means using "New" in the declaration is wrong and so is using (elementTrainingForm)
should just be

Public parentTable As TableView

Methods like this...

Public Sub ButtonBox1_Click()
  
  Dim d As Boolean = Dialog.OpenFile()
  Dim c As String = Dialog.Path
  
  PictureBox1.Picture = Picture.Load(c)
  PictureBox1.Mode = PictureBox.Contain
  
  pictureBox1Containes = True
  
  ButtonBox1.Text = c
  pictureViewerForm.imageLocation = c
  
End

if dialog is canceled the function continues to run!
You should use something like this...

Public Sub ButtonBox1_Click()
  
  If Dialog.OpenFile() then Return ' Dialog returns true if canceled so we exit the function.
  Dim c As String = Dialog.Path
  
  PictureBox1.Picture = Picture.Load(c)
  PictureBox1.Mode = PictureBox.Contain
  
  pictureBox1Containes = True
  
  ButtonBox1.Text = c
  pictureViewerForm.imageLocation = c
  
End

As to your layout error i cannot see anything obviously wrong.
I cannot run your code as it's only 3 source files not a testable project.
So it means scrolling through every line of code hunting for a mistake in an unfamiliar code style.

All i can say is ScrollView (you seem to be using a ScrollView not a ScrollArea like the title says) had a glitch like that in an older gambas version but it got fixed.

[BruceSteers]

Maybe try refreshing the tables on scrolling?

Public Sub Dyntable_root_Scroll()

  Last.Refresh

End

[seany]

Hi

I know the code is bad. It is my first prototype to display AI results.

But yes, i appreciate the corrections I did not know those details. Indeed, the "New TableView" was causing me problems which I circumvented with Variants. But now is better.

I am using 3.17.3 version, and I did test with refresh on scrollview_scroll, but it did not work. I will try with using refresh in table_scroll.

[BruceSteers]

Hi

I know the code is bad. It is my first prototype to display AI results.

But yes, i appreciate the corrections I did not know those details. Indeed, the "New TableView" was causing me problems which I circumvented with Variants. But now is better.

I am using 3.17.5 version, and I did test with refresh on scrollview_scroll, but it did not work. I will try with using refresh in table_scroll.

All good fella, we all gotta learn somehow right ?

looking at your code it looks like you are making a mistake that i myself used to do a lot.
Because i was not too familiar with properly using Panels and HBox's and their Arrangement properties and Expand or AutoResize properties in containers/controls I was trying to control the layout and positioning myself.

this turns out to be a real pain , baring in mind that your application may look fine as it is on your desktop now but if you try QT not GTK or if you change your desktop theme style then your size calculations might not be right with the new style.

What is better is to REALLY work on making the objects resize/position themselves automatically so you don't have to.
For many objects there is the AutoResize property (works better on some than others)

For TableView you can set
Colums[Index].Width = -1 (does an auto-resize to fit)
Rows[Index].Height = -1 (does an auto-resize to fit row)
Columns[Index].Expand (expands that column)

these methods carefully placed can help with layout.


I don't know why you are doing things like this..

Public Sub Dyntable_Click()
  
  Last.visible = False
  Last.visible = True

if you are having to do something like that to make something work then chances are something else is not right.

A glitch like you have often involves running through the code like a human debugger constantly looking for errors/better ways and eventually you crack it

[BruceSteers]

I got the form to load in a project but all i could make was a bit of a mess

the right hand panel does not fit the buttons.

adding rooms was , er , peculiar to say the least. i got a misplaced tableview at the top.

and if you zoom in on the attached picture you can see where the mouse is there is something there (a tiny little square, it's possibly the initially created parentTable)

It seems you are trying to do something a TableView is maybe not supposed to do?

I did not get the layout glitch you had but i had no text in my fields to go awry

[seany]

The right panel in my case, is adding showing the buttons correctly.

I saw the square. I will check, if that is my problem. Thank you

[cogier]

When uploading Gambas files to the Forum please use 'Source archive', your program will then run : -

[seany]

Oh this is very nice, thank you