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:

klaus · Feb 21, 2017

Not with one line. You can remove one row with:
Table1.RemoveRow(Row)
If you want to remove X rows at the end, do it in a loop.

B4X:

For row = Table1.Size - 1 To Table1.Size - 1 - X Step -1
    Table1.RemoveRow(row)
Next

peacemaker · Feb 22, 2017

Strange, when filling the table - starting some line the cells are filled by the number, and the same if to tap the table:

B4X:

    Dim row(11) As String
    For i = 0 To CurD.RowCount - 1
        tb.AddRow(row)
    Next

    For i = 0 To tb.NumberOfRows - 1
          tb.SetValue(0, i, i)
    Next

Video, showing the process: https://drive.google.com/open?id=0B8tskcuLtEqbbkQxNHp6bTV0NTA

Seems, some strange in this Sub:

B4X:

' draw a Row, now col is hidden (width <2)
Private Sub ShowRow(Row As Int)
    For I = 0 To lbls.Length - 1
        If (Header.GetView(I).Width > 1 ) Then
            SV.Panel.AddView(lbls(I), Header.GetView(I).Left, Row * cRowHeight, Header.GetView(I).Width, cRowHeight - cLineWidth)
            lbls(I).Text = values(I)

upd: source class of Erel has the same trouble !
B4A v.6.50, Android 5.0

If to use "tb.AddRowAutomaticWidth" - no such trouble !

klaus · Feb 22, 2017

Do you have a small project showing the problem so I can test it?

peacemaker · Feb 22, 2017

No project, just try to make a table by SetValue:

B4X:

    For i = 0 To tb.NumberOfRows - 1
          tb.SetValue(0, i, i)
    Next

and tap it later

grupotgr · Feb 22, 2017

grupotgr said:
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!!

Please, I need some help. I'm stuck and I need to make progress on this project. Thanks

peacemaker · Feb 23, 2017

grupotgr said:
Please, I need some help. I'm stuck and I need to make progress on this project. Thanks

What is the trouble ?
Use a timer to wait for the typing result, then make SELECTion from SQLite by the typed text, and update the table.

klaus · Feb 23, 2017

@peacemaker
You should move Dim row(11) As String

B4X:

Dim row(11) As String
For i = 0 To CurD.RowCount - 1
    tb.AddRow(row)
Next

into the For / Next loop.

B4X:

For i = 0 To CurD.RowCount - 1
    Dim row(11) As String
    tb.AddRow(row)
Next

klaus · Feb 23, 2017

@grupotgr
Can you give some more details on what exactly you want to do.
What data do you want to filter?
Do you want to update the Table dynamically, or find the rows containing the text?
What have you already done and tried?

klaus · Feb 24, 2017

@grupotgr
Is this what you are looking for?
Clicking on the header City or Country opens a serch view.
The selected item is highlighted in the table.
I modified a bit the SearchView Class and set the Data List in the Table Class to Public.

luciano deri · Mar 6, 2017

Hello. I have a very big sqlite table ( over 800.000 rows). I can upload in grid table only rows visible in screen or few more, and upload more when scroll?
Thanks

klaus · Mar 6, 2017

Not inside the Table.
You need to manage it yourself.
Trying to scroll more than a few hundreds of rows is not realistic from my users point of view.

luciano deri · Mar 6, 2017

klaus said:
Not inside the Table.
You need to manage it yourself.
Trying to scroll more than a few hundreds of rows is not realistic from my users point of view.

Ok, i must intercept a scroll finish event and after make a new query...
Is possible intercept scroll finisc?
Variable maxVisibleRow what do? Can i set it to help me for this problem?

klaus · Mar 6, 2017

The Table class creates 80 rows with Labels, which are reused when scrolling
You may have a close look at Sub SV_ScrollChanged.
Perhaps you could integrate the the queries there.

luciano deri · Mar 6, 2017

is there an event when scrollview is scrolled from last row? In this time i can start a new query to show some other records

klaus · Mar 6, 2017

The only event is Private Sub SV_ScrollChanged.
You need to check there.

Pintinho · Mar 7, 2017

Hi,

Not sure if it was mentioned before but I think that row and col on the Cell_Click and LongCellClick have the row & col the wrong way around:

B4X:

Private Sub Cell_Click
    Dim rc As RowCol
    Dim L As Label
    L = Sender
    rc = L.Tag
    '    SelectRow(rc.Row)
    SelectRow(rc)
    If SubExists(cCallBack, cEventName & "_CellClick") Then
        CallSub3(cCallBack, cEventName & "_CellClick", rc.Col, rc.Row) 'should be rc.Row, rc.Col
    End If
End Sub

klaus · Mar 7, 2017

Thank you for reporting this:
You should not change in the Cell_Click and Cell_LongClick routines, it has been so since the beginning.
You should change:
#Event: CellClick(row As Int, col As Int)
#Event: CellLongClick(row As Int, col As Int)
to
#Event: CellClick(col As Int, row As Int)
#Event: CellLongClick(col As Int, row As Int)

luciano deri · Mar 8, 2017

klaus said:
The only event is Private Sub SV_ScrollChanged.
You need to check there.

I have thinked this solution. What do you think about it?

B4X:

    Private LimiteQuery As Int
'Modify on class table
' the caller can set this variable
Public Sub setLimiteQuery(LQ As Int)
    LimiteQuery = LQ
End Sub
Private Sub SV_ScrollChanged(PosX As Int, PosY As Int)
....
'add thi code
    Dim n, n2 As Int
    n = maxVisibleRow + 1
    n2 = currentMax + 1
  
    If SV.ScrollingIsFinished And n2 = LimiteQuery  And Not (Fine) Then
        Fine  = True
        UltimaRiga
    End If
    If n < LimiteQuery Then
        Fine = False  
    End If
    If SV.ScrollingIsFinished And  currentMin <= 0 And    Not (Inizio) And maxVisibleRow > - 1 Then
        Inizio = True
        PrimaRiga
    End If  
    If minVisibleRow > 0 Then
        Inizio = False  
    End If
End Sub
' return to the caller when scroll stop on last and frist page

Private Sub UltimaRiga
    If SubExists(Callback, Event & "_UltimaRiga") Then
        CallSub(Callback, Event & "_UltimaRiga")
    End If
End Sub
Private Sub PrimaRiga
    If SubExists(Callback, Event & "_PrimaRiga") Then
        CallSub(Callback, Event & "_PrimaRiga")
    End If
End Sub

'Modify on projet
Sub Tabl_UltimaRiga
    Pagina = Pagina + 1
    Tabl.ClearAll
     LoadSqliteDb
End Sub
Sub Tabl_PrimaRiga
    If Pagina > 1 Then
        Pagina = Pagina - 1
         Tabl.ClearAll
         LoadSqliteDb
    End If
End Sub
Sub LoadSQLiteDB
    limitequery = 300
    Tabl.setLimiteQuery(limitequery)
    StrQuery = "SELECT ..."
    limini  = (Pagina - 1 ) * limitequery
    StrQuery = StrQuery & " LIMIT " & limini & " , " & limitequery
  
    Tabl.LoadSQLiteDB(Main.dbSql, StrQuery,False)
  
End Sub

klaus · Mar 8, 2017

You should try it.

luciano deri · Mar 8, 2017

klaus said:
You should try it.

it seems to work fine ...

But i don't understand the differences between maxVisibleRow and currentMax

B4A Library [Class] Flexible Table

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