B4A Library [Class] Flexible Table

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:

1589638570453.png
 

Attachments

  • TableV1_44.zip
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  • 1589638550715.png
    1589638550715.png
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  • TestFastScroll.zip
    50.6 KB · Views: 1,480
  • Table.bas
    152.2 KB · Views: 211
  • TableV3_35.zip
    110 KB · Views: 293
Last edited:

Mike Olmsted

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Longtime User
How can I resize (or move) the table after AddToActivity?

explaining:
On my screen I will use two tables, the first by default is on top and the second at the bottom.
I want to let the user change the visibility of these tables.
(example: if the first table to be invisible, the second has to occupy the entire screen ...)

Is it possible?

Thanks!
Set them both up in panels, then Table2_Cellclick does the job..
B4X:
pnlTable.Initialize("")
    Activity.AddView(pnlTable, 0%x, 60dip, 90%x, 70%y-60dip)   
    Table1.Initialize(Me, "Table1", 5)
    Table1.AddToActivity(pnlTable, 0, 0, pnlTable.Width, pnlTable.Height)   
   
    pnlTable2.Initialize("")
    Activity.AddView(pnlTable2, 0%x, 70%y, 90%x, 30%y)   
    Table2.Initialize(Me, "Table2", 5)
    Table2.AddToActivity(pnlTable2, 0, 0, pnlTable2.Width, 80%y)   
   
    query = "SELECT * FROM " & DBTableName
    Table1.LoadSQLiteDB(DBFileDir, DBFileName, sql1, query)
    Table1.SetColumnsWidths(Array As Int(10%x, 20%x, 20%x, 20%x, 20%x))

    query = "SELECT * FROM " & DBTableName
    Table2.LoadSQLiteDB(DBFileDir, DBFileName, sql1, query)
    Table2.SetColumnsWidths(Array As Int(10%x, 20%x, 20%x, 20%x, 0%x))
   '=================================================
Sub Table2_cellclick (Col As Int, Row As Int)
pnlTable.visible = False
pnlTable2.Top = 60dip
pnlTable2.Height = 80%y
End Sub
 

lhbrito

Member
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Longtime User
Set them both up in panels, then Table2_Cellclick does the job..
B4X:
pnlTable.Initialize("")
    Activity.AddView(pnlTable, 0%x, 60dip, 90%x, 70%y-60dip)  
    Table1.Initialize(Me, "Table1", 5)
    Table1.AddToActivity(pnlTable, 0, 0, pnlTable.Width, pnlTable.Height)  
  
    pnlTable2.Initialize("")
    Activity.AddView(pnlTable2, 0%x, 70%y, 90%x, 30%y)  
    Table2.Initialize(Me, "Table2", 5)
    Table2.AddToActivity(pnlTable2, 0, 0, pnlTable2.Width, 80%y)  
  
    query = "SELECT * FROM " & DBTableName
    Table1.LoadSQLiteDB(DBFileDir, DBFileName, sql1, query)
    Table1.SetColumnsWidths(Array As Int(10%x, 20%x, 20%x, 20%x, 20%x))

    query = "SELECT * FROM " & DBTableName
    Table2.LoadSQLiteDB(DBFileDir, DBFileName, sql1, query)
    Table2.SetColumnsWidths(Array As Int(10%x, 20%x, 20%x, 20%x, 0%x))
   '=================================================
Sub Table2_cellclick (Col As Int, Row As Int)
pnlTable.visible = False
pnlTable2.Top = 60dip
pnlTable2.Height = 80%y
End Sub

Almost it .. I thought to use within a panel as well, but it did not work:

Scrolling the second table only works properly when it is "maximized". (In your example, after CellClick)

Comparing with Delphi: if the table has the property "Align: = alClient" work place it inside the Panel and change the size / position of the panels.

But thanks, I'll do some other tests.
 

lhbrito

Member
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Longtime User
Not in the current version, it would need to these properties in the Class code.

Ok

I made some changes in the class and in my tests it worked.

Added methods: SetLeft, SetTop, SetWidth, SetHeight, GetLeft, GetTop, GetWidth and GetHeight

If useful, feel free to add in a future version.

Thank you!

B4X:
Public Sub GetLeft As Int
   Return pnlTable.Left
End Sub

Public Sub GetTop As Int
   Return pnlTable.Top
End Sub

Public Sub GetWidth As Int
   Return pnlTable.Width
End Sub

Public Sub GetHeight As Int
   Return pnlTable.Height
End Sub

Public Sub SetLeft(Left As Int)
   pnlTable.Left = Left
End Sub

Public Sub SetTop(Top As Int)
   pnlTable.Top = Top
End Sub

Public Sub SetWidth(Width As Int)
   pnlTable.Width = Width
   SV.Width = Width
   internalPanel.Width = Width
   updateIPLocation
End Sub   

Public Sub SetHeight(Height As Int)
   pnlTable.Height = Height
   If (showStatusLine = True) Then
     SV.Height = Height - (cRowHeight * 2)
   Else
     SV.Height = Height - (cRowHeight)   
   End If
   lblStatusLine.Top = SV.Top + SV.Height
   updateIPLocation
End Sub
 

enrico

Active Member
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Longtime User
To me Table1.29 example stops in line 153 -> bmp.InitializeMutable(1dip, 1dip)

with error ->
java.lang.IllegalArgumentException: width and height must be > 0

But it happens in Android 2.2 emulator and not in Android 2.3.3 where it works ok
 
Last edited:

enrico

Active Member
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Longtime User
String sorting is not good for numeric fields.
I think we need to specify in some way which fields are numeric and sort them in a different and right mode.
 

enrico

Active Member
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Longtime User
Ansewer to post #85
Strange.
I tried it with an Android 2.2 Emulator and it works without any error.
My Android Manager is version 22.3

I don't know but I was trying my modified project with Android 2.2 emulator and couldn't understand the problem.
So after lots of tests I tried the example and I got the same error.

Trying now with Android 4.0.3 and it works.
 

enrico

Active Member
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Longtime User
Can you help me in sorting columns populated by numbers ?
Do you think this class could be implemented for it or I have to try in other way ?
 

enrico

Active Member
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Longtime User
I modified headers to have the text in two rows separated by a CR and it works.
But how can I adjust columns width, calculating only the longer of the two rows (now it considers all the text of the header).
I think I have to alter SetHeader Sub, but I don't know how to achieve it (and if it's possible).
 

klaus

Expert
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Longtime User
I suppose you are using AutomaticWidths.
In the SetHeader routine replace
B4X:
If cAutomaticWidths = True Then
    HeaderWidths(i) = Max(HeaderWidths(i),cvs.MeasureStringWidth(str(j), l.Typeface, cTextSize)  + 8dip)
by this
B4X:
If cAutomaticWidths = True Then
    If Values(i).Contains(CRLF) Then
        Dim str() As String
        Dim j As Int
        str = Regex.Split(CRLF, Values(i))
        HeaderWidths(i) = cvs.MeasureStringWidth(str(0), l.Typeface, cTextSize)  + 8dip
        For j = 1 To str.Length - 1
            HeaderWidths(i) = Max(HeaderWidths(i),cvs.MeasureStringWidth(str(j), l.Typeface, cTextSize)  + 8dip)
        Next
    Else
        HeaderWidths(i) = cvs.MeasureStringWidth(Values(i), l.Typeface, cTextSize)  + 8dip 
    End If
Do you change the row height ?
 

enrico

Active Member
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Longtime User
Wonderful ! Thanks.

(Row height changed to 40dip to fit the two rows)

Another thing I think it would make it better is to set all cell labels at least 1 pixel far from cell margins.
 
Last edited:

enrico

Active Member
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Longtime User
I modified sorting routine to manage columns with numbers :

B4X:
Public Sub SelectionSort (col As Int,dir As Boolean)
    Dim minIndex As Int
    For i = 0 To Data.Size - 1
        minIndex = i
        For j = i + 1 To Data.Size - 1
            Dim values1() As String = Data.get(j)
            Dim values2() As String = Data.get(minIndex)
            If col=0 OR col=25 OR col=27 Then        'These are columns with strings
                Dim s1 As String = values1(col)
                Dim s2 As String = values2(col)
                If (dir) Then
                    If s1.CompareTo(s2) < 0 Then minIndex = j
                Else
                    If s1.CompareTo(s2) > 0 Then minIndex = j
                End If
            Else                                        'Numeric Sorting
                Dim n1 As Float
                Dim n2 As Float
                If IsNumber(values1(col).Replace(",","")) Then n1 = values1(col).Replace(",","") Else n1 = 0
                If IsNumber(values2(col).Replace(",","")) Then n2 = values2(col).Replace(",","") Else n2 = 0
                If (dir) Then
                    If n1 < n2 Then minIndex = j
                Else
                    If n1 > n2 Then minIndex = j
                End If
            End If
        Next
        SwapList(i, minIndex)
    Next
End Sub

Unfortunately the process is very much slower then with strings
 

enrico

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I was wondering if it can be possible to fix the first column of the table, like in Excel for example
 

vecino

Well-Known Member
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Hello, to sort numeric columns would need to do something similar to the alignment and width each column: indicate if the column is string or numeric

Regards.
 

enrico

Active Member
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Longtime User
I have a strange problem.

Only on a tablet with Android 4.1.2 I get this error :
An error has occurred in sub:table_initialize (java line: 845)
java.lang.IllegalArgumentException: width and height must be > 0

Continuing with "Yes" I get this :
An error has occurred in sub:table_updateiplocation (java line: 2540)
java.lang.NullPointerException

On all other devices I tried, it works without errors.
 

slugger

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Longtime User
Hello,

I am triyng to use the library, specifically the LoadTableFromCSV/SaveTableToCSV.

I have a csv file with no headers so I use FALSE as the HeaderExist parameter.

The problem is the SaveTableToCSV counterpart always adds the headers to the csv file on disc, this way each time I save the file a new record is added at the beginning of the csv file containing "Col1","Col2", and so on.

After 5 SaveTableToCSV commands I have 5 new records all with "Col1","Col2", and so on.

Can you please add a way to save to csv without the headers?
 

slugger

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Longtime User
I modified your source code by myself, I changed the

StringUtils1.SaveCSV2(Dir, Filename, ",", Data, headers)

to

StringUtils1.SaveCSV(Dir, Filename, ",", Data)
 
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