B4A Library [Class] Flexible Table

klaus · Jun 30, 2013

This thread will be used by Erel, Melamoud and myself to discuss / post new releases of the Table class.

The table class is a flexible UI component that enable scrollable table like UI, with sortable columns, multiselect rows etc

the table is very efficient, maintaining labels only for visible rows

old thread with details : http://www.b4x.com/forum/additional...view-supports-tables-any-size.html#post110901

The class depend on following libraries:
- StringUtils (standard)
- SQL (standard)
- JavaObject (standard)
- B4XCollections (standard)
- ScrollView2D (additional)

List of major features.
1. scrollable table UI
2. sortable columns
3. select a row, cell or multi select rows
4. callback for selection / click a cell / row
5. callback for long click action
6. read / write to CSV file

Current version --> 3.35 Custom View
Current version --> 1.44 Class

Other complementary routines:

Load data with the Remote Database Connector.

EDIT: LucaMs has written a routine to fill a table with a Remote Database Connector query result see post 182.
The routine hasn't been added into the Class for the reasons explained in post 183.
A sample program can be found HERE.

Code:

B4X:

'load data from a RDC Request
'Result = DBResult object got from a RDC request
'AutomaticWidths  True > set the column widths automaticaly
'Written by LucasMs
Public Sub LoadRDCResult(Result As DBResult, AutomaticWidths As Boolean)
    cAutomaticWidths = AutomaticWidths
    NumberOfColumns = Result.Columns.Size
    innerClearAll(NumberOfColumns)

    Dim Headers(NumberOfColumns) As String
    Dim ColumnWidths(NumberOfColumns) As Int
    Dim HeaderWidths(NumberOfColumns) As Int
    Dim DataWidths(NumberOfColumns) As Int
    Dim col, row As Int
    Dim str As String
    For col = 0 To NumberOfColumns - 1
        Headers(col) = Result.Columns.GetKeyAt(col)
        If AutomaticWidths = False Then
            ColumnWidths(col) = 130dip
            HeaderWidths(col) = 130dip
            DataWidths(col) = 130dip
        Else
            HeaderWidths(col) = cvs.MeasureStringWidth(Headers(col), Typeface.DEFAULT, cTextSize) + 8dip + cLineWidth
            DataWidths(col) = 0

            Dim FieldValue As Object
            For row = 0 To Result.Rows.Size - 1
                Dim Record() As Object = Result.Rows.Get(row)
                FieldValue = Record(col)
                If GetType(FieldValue) = "java.lang.String" Then
                    DataWidths(col) = Max(DataWidths(col), cvs.MeasureStringWidth(str, Typeface.DEFAULT, cTextSize) + 8dip + cLineWidth)
                End If
            Next
            ColumnWidths(col) = Max(HeaderWidths(col), DataWidths(col))
        End If
    Next
    SetHeader(Headers)
    SetColumnsWidths(ColumnWidths)

    For Each Record() As Object In Result.Rows
        Dim R(NumberOfColumns) As String
        Dim FieldV As String
        For col = 0 To NumberOfColumns - 1
            FieldV = Record(col)
            R(col) = FieldV
        Next
        AddRow(R)
    Next
End Sub

This is another routine updated by cimperia in post #392 using a Map for the columns and a List for the rows.

B4X:

'load data from a RDC Request
'A RDC request returns a DBResult object, therefore this method
'could be called as is:
'LoadRDCResult(DBResult.Columns, DBResult.Rows, True)
'AutomaticWidths  True > set the column widths automaticaly
'Written by LucasMs
Public Sub LoadRDCResult(Columns As Map, Rows As List, AutomaticWidths As Boolean)
  cAutomaticWidths = AutomaticWidths
  NumberOfColumns = Columns.Size
  innerClearAll(NumberOfColumns)

  Dim Headers(NumberOfColumns) As String
  Dim ColumnWidths(NumberOfColumns) As Int
  Dim HeaderWidths(NumberOfColumns) As Int
  Dim DataWidths(NumberOfColumns) As Int
  Dim col, row As Int
  Dim str As String
  For col = 0 To NumberOfColumns - 1
    Headers(col) = Columns.GetKeyAt(col)
    If AutomaticWidths = False Then
      ColumnWidths(col) = 130dip
      HeaderWidths(col) = 130dip
      DataWidths(col) = 130dip
    Else
      HeaderWidths(col) = cvs.MeasureStringWidth(Headers(col), Typeface.DEFAULT, cTextSize) + 8dip + cLineWidth
      DataWidths(col) = 0

      Dim FieldValue As Object
      For row = 0 To Rows.Size - 1
        Dim Record() As Object = Rows.Get(row)
        FieldValue = Record(col)
       If GetType(FieldValue) = "java.lang.String" Then
         DataWidths(col) = Max(DataWidths(col), cvs.MeasureStringWidth(str, Typeface.DEFAULT, cTextSize) + 8dip + cLineWidth)
       End If
      Next
      ColumnWidths(col) = Max(HeaderWidths(col), DataWidths(col))
    End If
  Next
  SetHeader(Headers)
  SetColumnsWidths(ColumnWidths)

  For Each Record() As Object In Rows
    Dim R(NumberOfColumns) As String
    Dim FieldV As String
    For col = 0 To NumberOfColumns - 1
      FieldV = Record(col)
      R(col) = FieldV
    Next
    AddRow(R)
  Next
End Sub

Load data from a MSMariaDB database.

Another routine for loading data from a MSMariaDB database can be found in post#727.
Thanks to @Magma.

Updates:
EDIT: 2024.04.21 Version 3.35
Replaced the original sorting functions by new ones kindly provided by forum member RB Smissaert.
Amended first scroll scrolling back to 0
Amended Header with transparent color

EDIT: 2024.01.13 Version 3.33
Changed possible values for DataType
TEXT and NUMBER become T, R and I
Amended problem with column colors
Amended problems with SetHeaderColors and SetHeaderTextColors

Version 3.32
Amended Header and HeaderFirst problem in SaveCSVFromTable
Moved If (lblStatusline... from AddRow to ShowRow

Version 3.31
Added SingleLine property for the Designer
Added StatusLineHeight as a property
Added FastScrollLabelMaxChars as a property

EDIT: 2021.06.28 Version 3.30
Added a check for none numeric values for numeric sorting.

EDIT: 2021.06.28 Version 3.29
Amended problem with column colors
Version 3.28
Added NumberOfColumns in the code
Added TopRowIndex method
Version 3.27
Amended MultiSelect EDIT: 2020.09.02 Version 3.26
Amended problem with sort with remove accents
Amended problem with SetRowColorN
Added SetCellAlignmentColN method
Added SetHeaderAlignmentColN method

EDIT: 2020.08.05 Version 3.24
Amended problem with JumpToRowAndSelect not being selected.
Amended error when setting RowHeight before the table initialized

EDIT: 2020.06.19 Version 3.22
Amended error in the insertRowAt routine.

EDIT: 2020.05.25 Version 3.21
Amended bug with TextSize in fixed columns

EDIT: 2020.05.16 Version 3.20
Added fast scroll feature
Version 3.19
Improved automatic width calculation and hidden columns
Version 3.18
Added a check in RemoveRowColorN to ensure that Row is not out of bounds
Added ShowRow event
Amended automatic width calculations
Amended hidden column width problem

EDIT: 2020.04.21 Version 3.17
Amended HeaderHight problem with fixed columns

EDIT: 2020.04.21 Version 3.16
Amended two errors.

EDIT: 2020.04.14 Version 3.14
Added the methods below
- LoadSQLiteDB4(SQLite As SQL, Query As String, AutomaticWidths As Boolean)
loads SQLite data with data type checking
- LoadSQLiteDB5(SQLite As SQL, Query As String, Values() As String, AutomaticWidths As Boolean).
loads SQLite data with data type checking , similar to LoadSQLiteDB4 but for parametrized queries.
- GetColumnDataTypes As String(), returns an Array with the data type for each column.
- GetColumnDataType(Column As Int) As String, returns the data type of the fiven column.
Added the InnerTotalWidth property, read only.
Added multiple first fiexed columns
Added line colors

EDIT: 2020.03.10 Version 3.10
Amended bug reported HERE

EDIT: 2020.03.06 Version 3.09
Amended bug reported HERE.

EDIT: 2020.02.29 Version 3.08
Amended SetHeaderTypefaces method problem reprted HERE.
Added HeaderTypeface property.

EDIT: 2020.01.08 Version 3.07
Amended bug ShowStatisLine = False property bug.
Added MultiSelect property to Designer properties.
You need to open and close the Designer when you use the new version the first time to make the MultiSelect property active.

EDIT: 2019.12.28 Version 3.06
Amened some bugs

EDIT: 2019.12.25 Version 3.05
Added FirstColumnFixed property which allows to fix the first column.
Attention: You need to open and close the Designer to make the new property active.

EDIT: 2019.11.15 Version 3.04
- Added SelectedRowTextColor and SlectedCellTextColor properties
- Added ZeroSelections property, True > when a selected row is pressed it will be unselected False > it remains selected.

EDIT: 2019.11.12 Version 3.03
- Changed JumpToRowAndSelect(Row As Int, Col As Int) to JumpToRowAndSelect(Col As Int, Row As Int)
- Changed LoadSQLiteDB2 signature. Replaced the possible values from "T", "I", "R" to "TEXT", "NUMBER" for coherence with SetColumnDataTypes.
- Added internal sorting bitmaps, avoids loading the image files into the Files folder.
- Added two new properties: SortBitmapWidth and SortBitmapColor.
- Added SetCustomSortingBitmaps method, which allows to use custom bitmaps instead of the internal ones.
Attention: You need to open and close the Designer to make the new properties active.
Attention: You need to invert the parameters in JumpToRowAndSelect.

EDIT: 2019.07.04 Version 3.02
Amended error reported in post #887

EDIT: 2019.06.26 Version 3.01
Amended SingleLine property setting in the code

EDIT: 2019.04.05 Version 3.00
Amended SetColumnColors and SetTextColors
Removed Reflection library dependency

EDIT: 2018.04.11 Version 2.29
Version 2.27
set the two variables sortedCol and sortingDir to Public instaed of Private
added RemoveAccent routine for sorting with accented characters
Version 2.28
Added SetHeaderTypeFaces
Added SortRemoveAccents property
Version 2.29
Added SaveTableToCSV2 with a user defined separator character

EDIT: 2018.04.11 Version 2.26
added LoadSQLiteDB3 method using SQLExec2 instead of SQLExec
The query can include question marks which will be replaced with the values in the array.

EDIT: 2018.03.27 Version 2.25
amended minor errors
added UpdateCell method

EDIT: 2017.11.19 Version 2.22
improved JumpToRowAndSelect scrolls horizontally to the selected column
improved setHeaderHeight
added padding for status bar Label

EDIT: 2017.06.27 Version 2.19
Replaced DoEvents by Sleep(0)
Asked HERE

EDIT: 2017.06.27 Version 2.19
Replaced DoEvents by Sleep(0)
Asked HERE

EDIT: 2017.05.16 Version 2.18
Amended error reported HERE.

EDIT: 2017.03.09 Version 2.17
Amended error reported HERE.

EDIT: 2017.03.09 Version 2.15
Amended error reported here, Event signatures
#Event: CellClick(col As Int, row As Int)
#Event: CellLongClick(col As Int, row As Int)

EDIT: 2016.12.05 Version 2.14
Added NumberOfColumns and NumberOfRows as Public variables.
Amended error reported here.

EDIT: 2016.12.05 Version 2.13
Amended error reported here.
Added NumberOfColumns as a property for the Designer.

EDIT: 2016.07.30 Version 2.10
Amended error with TextAlignment and HeaderTextAlignment reported in post #606

EDIT: 2016.03.15 Version 2.00
Added CustomView support.
This version can be compiled into a library.
Changes between the previous versions and version 2.00
For a Table added in the Designer, this is new
No need to initialize nor add it onto a parent view
'For a Table added in the Designer, this is new
'No need to initialize nor add it onto a parent view

For a Table added in the code:
The Initialize routine has been splittend into two routines.
New:
Initialize (CallBack As Object, EventName As String)
InitializeTable (vNumberOfColumns As Int, cellAlignement As Int, showStatusL As Boolean)
'Example:
Table1.Initialize(Me, "Table1")
Table1.InitializeTable(5, Gravity.CENTER_HORIZONTAL, True)

Old:
Initialize(CallBack As Object, EventName As String, vNumberOfColumns As Int, cellAlignement As Int, showStatusL As Boolean)
Example:
Table1.Initialize(Me, "Table1", 5, Gravity.CENTER_HORIZONTAL, True)

EDIT: 2015.04.29 Version 1.43
As the modifications in LoadSQLiteDB don't work in all cases I went back.
LoadSQLiteDB as in version 1.40
Added LoadSQLiteDB2 where the column data types must be given.

EDIT: 2015.04.26 Version 1.42
Changed he LoadSQLiteDB routine, version 1.41 didn't work as expected.
The final solution was suggested by cimperia HERE.

EDIT: 2015.04.16 Version 1.41
Changed the LoadSQLiteDB routine according to the error reported in the SQL issue thread
and the SQLite Cursor GetString versus GetDouble thread.
The problem appears with numbers bigger than 999999.
I left version 1.40 in case of problems.
I tested it with a few databases, but I am not sure if it works in all cases.

EDIT: 2015.03.05
Amended bugs reported in posts #383 and #386
Added SetAutomaticWidths routine

EDIT: 2015.02.19
Amended the problem alignment reported in post # 378

EDIT: 2015.02.13
Amended the problem of rows not shown reported in post # 371

EDIT: 2015.01.09
Added header aligments

EDIT: 2014.08.14
Added HeaderHeight property
Amended RowColor problem reported in post #260

EDIT: 2014.08.10
Added SortColumn property asked in post #266
Added UseColumnColors ColumnColors and HeaderColors propeties

EDIT: 2014.05.10 Added RowHeight as a property

Screenshot:

erasmusackon · Jan 27, 2017

Please how can i add the table to show in a specific panel?

klaus · Jan 27, 2017

Table1.AddToActivity(MyPanel, ...)

Bhrt60 · Jan 28, 2017

I've just looking at Table v2.13 example

Using Samsung Galaxy S7 how can I get the both Tables to use the Full width (portrait mode) ?
at the moment the tables are both different width & sort of awkwardly placed - sort of centered

I would like both tables to use the Full width and both aligned to the left

I looked at the code but not able to see how I can change them

Couple of other questions:
(1) is its possible to EDIT the content of a cell & save back to db?
(2) I see an option to remove row - is there anyway to add a row and save back to db ?

klaus · Jan 29, 2017

I would like both tables to use the Full width and both aligned to the left

How do you add the Tables?
In the Designer you should set the horizontal anchor to BOTH.
In the main code you could use %x values. Example:
Table1.AddToActivity(Activity, 50dip, 20dip, 300dip, 100%x - 50dip)

1) No, you cannot edit a cell directly, the cells are Labels and not EditTexts. You need to do it on your own, and update the value in the Table.
2) Yes, you have the insertRowAt function. But you need to update the database on your own.
The Table and the database are not linked together and the Table content depends on the SQL query which will not always show the whole database.

Bhrt60 · Jan 29, 2017

klaus said:
How do you add the Tables?
In the Designer you should set the horizontal anchor to BOTH.
In the main code you could use %x values. Example:
Table1.AddToActivity(Activity, 50dip, 20dip, 300dip, 100%x - 50dip)

1) No, you cannot edit a cell directly, the cells are Labels and not EditTexts. You need to do it on your own, and update the value in the Table.
2) Yes, you have the insertRowAt function. But you need to update the database on your own.
The Table and the database are not linked together and the Table content depends on the SQL query which will not always show the whole database.

There are a lot of examples & I guess lot of programers are using B4A
and I guess its all done by volunteers like you

As a non-programer I'm disappointed that there are NO "Practical" Examples available
(if there are I've missed them!!)

5 years ago I started using MS Access & having Northwind WORKING example helped a LOT
I modified it to our requirements and now it's used for Service Management, Purchase orders, Invoices
everything apart from accounting

Without WORKING & PRACTICAL examples I would never have got started

I've spent 2 weeks (because I have other duties I can only manage a few hours a day) looking at examples but not been able to produce BASIC useable app !!!

PITTY really

I guess will be 1000's like me but some will give up !

klaus · Jan 29, 2017

As a non-programer I'm disappointed that there are NO "Practical" Examples available

What kind of examples are you missing?
There are examples showing basic principles in the B4A Beginner's Guide and the B4A User's Guide and also in the forum.
Not sure you will find examples fitting exactly what you want.

Bhrt60 · Jan 29, 2017

I'm not asking nor do I expect Full Apps as a such

Just something that shows the whole process of adding updating a Tabel (ideally a set of related tables)

Ok, take Table V2.13 as an example.
(I'm using this because earlier table 1.0 etc is 4-5 years old and I notice various bug/improvements so my thoughts are v2.13 is the latest so should start with that)

For a beginner like me it looks like a confused mess!
take for instance the code includes citylist.csv example from earlier iteration which is not being used here

For a career programmer this might be useful bunch of code...
but for a novice...

Ideally, would like to see a complete example to load a SQLite table into a List control
Allow the user to Add a record or select Record to edit via a Form and put it back to List AND update the SQL DB at the sametime

(since its possible know the Cell value perhaps a pop-up windows to allow Edit of the cell value will do if edit in grid is not possible).

Also in this example displaying the 2nd List from the same table seems totally pointless
again I would like to see a RELATED table - staying with the People theme this could be the persons Children's names

(Going to Northwind example - you have Customers and their related Orders)

grupotgr · Feb 16, 2017

Hi all, I need to filter the table while I am writing in textchanged, now I am using jumptorowandselect, but it is not the most effective solution. My code for now is as follows:

B4X:

Sub txtBuscarArticulo_TextChanged (Old As String, New As String)

    strArt = txtBuscarArticulo.Text
  
    For i = 0 To Table1.Size -1
        Dim lineas As String
        lineas = Table1.GetValue(1, i)

        If lineas.Contains(strArt) = True Then
            Table1.JumpToRowandselect(i,2)
            fila = i

End Sub

Please, can you give me some idea?

klaus · Feb 16, 2017

What exactly do you want to do?

grupotgr · Feb 16, 2017

I want to show in the table the results you find according to what is written in the edittext.
Sorry for my bad English!!

klaus · Feb 16, 2017

If you really want to show the row where the partial text matches the text in the column, it's the only solution with the Table class.
But, effectively it's by far not efficient.
Do you exit the routine after the first match?

B4X:

 If lineas.Contains(strArt) = True Then
    Table1.JumpToRowandselect(i,2)
    fila = i

grupotgr · Feb 16, 2017

Any other suggestions? Even if it is not in the table class?

klaus · Feb 16, 2017

To give you any other suggestion you must explain more in detail what exactly you want to do.
Where does the data come from?
What kind of filter you need?
ect.
Maybe this could be useful: [Class] SearchView

grupotgr · Feb 16, 2017

I am working with a MYSQL DB, PHP, and SQLite, I am bringing the data from mysql using PHP, then I show them in the table with this same class (table), I now need to show the results (filter on the table / grid) that contain what the user is typing on the edittext, but I can`t find a way to make it work.
Thanks!!

grupotgr · Feb 16, 2017

Data come from here:

B4X:

Table1.LoadSQLiteDB(Starter.sql, sql, True)

klaus · Feb 16, 2017

Can't you filter directly in the SQLite query?

grupotgr · Feb 17, 2017

No, I can´t because I enter values inside the cells and then save them. And with the loadsqlitedb each time I filter it obviously deletes all the values I entered.

klaus · Feb 17, 2017

It was just a question.

grupotgr · Feb 17, 2017

Yes, I know, sorry if I wrote in a bad way. (It's because of my horrible English). Thanks for the help

ronin69 · Feb 21, 2017

Hi

Can i delete the X rows at the end of the table ?

Thanks

Gianluca Gaggi

B4A Library [Class] Flexible Table

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