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 · Aug 7, 2014

Can I have a table with no header row?

In version 1.34, in the first post, I added a HeaderHeight property.
Setting it to '0' removes the Header.

If a table is created with Addrows, Table RowColor2 cannot be changed. It works loading CSV and DB.

I amended the RowColor problem.

tdocs2 · Aug 7, 2014

Thank you, Klaus.

This extended table class is a great contribution to the community. VERY powerful tool! Thank you.

Best regards.

Sandy

Kapelis · Aug 9, 2014

Hello friends, I'm trying to build some kind of calendar with this class and I would like to highlight the days of Saturday and Sunday with a different color, is it possible? I have already changed the color of rows by changing the cRowColor1 and cRowColor2 in the class.
I tried this code but it doesn't work:

B4X:

Dim GiornoL2 As Long ' (vedi "GiornoL")

For x = 1 To Table1.Size-1
    GiornoL2 = DateTime.GetDayOfWeek(Table1.GetValue(4, x))
' Table1.GetValue(4, x) = date in Ticks
    If GiornoL2 =1 Then
        'Table1.JumpToRowAndSelect(x, 4)
        'Table1.SelectedRowColor=Colors.Magenta
        Table1.RowColor1=Colors.Green
        Table1.RowColor2=Colors.Green
    End If
   
Next

Thank you all

klaus · Aug 9, 2014

It is not possible to set different colors to individual cells, nor is it possible to define different colors for columns.
I think you could easily achieve this with a standard ScrollView or with the CustomListview class.

Kapelis · Aug 9, 2014

klaus said:
It is not possible to set different colors to individual cells, nor is it possible to define different colors for columns.
I think you could easily achieve this with a standard ScrollView or with the CustomListview class.

Such a pity, I really like this flexible table... :-(
Thank you very much.

tdocs2 · Aug 9, 2014

Greetings, all. Thank you in advance for answering my question.

Question:
Is there a way to prevent sort table on header_click? The sort feature is a very attractive feature, but many tables require to be static and not resorted accidentally by the user.

Any and all help will be welcomed.

Best regards.

Sandy

LucaMs · Aug 9, 2014

You have the source code.

Just add a global Boolean variable (or property!), set it and check it on click

[P.S. ehm... if it does not already exist!]

tdocs2 · Aug 9, 2014

LucaMs said:
You have the source code.

Just add a global Boolean variable (or property!), set it and check it on click

[P.S. ehm... if it does not already exist!]

Thank you, Luca.

1. On every Flex Table Class update, I would have to remember what I did and reinstate it.
2. I think it is a good request that other users in the community would benefit.
3. I am not that proficient with Class modules.

And on your P.S. - I looked at the class code - I did not see a way to do it, but I may have missed it.

Best regards.

Sandy

LucaMs · Aug 9, 2014

Ok, the great Klaus will add a property to lock the sorting, I'm sure

tdocs2 · Aug 9, 2014

LucaMs said:
Ok, the great Klaus will add a property to lock the sorting, I'm sure

I hope so.

LucaMs · Aug 9, 2014

It is very simple, but this is his creature

Klaus will do that in two minutes!

klaus · Aug 10, 2014

It is very simple, but this is his creature

The class was basicaly wrtitten by Erel, some other users including me have added new features to the class.

In the first post you find version 1.35 including the new SortColumn property.

klaus · Aug 10, 2014

Kapelis said:
Hello friends, I'm trying to build some kind of calendar with this class and I would like to highlight the days of Saturday and Sunday with a different color, is it possible?

Adding an option to set different column colors instead of 2 row colors is relatively easy.
If you are interested in I could add it.

tdocs2 · Aug 10, 2014

klaus said:
The class was basicaly wrtitten by Erel, some other users including me have added new features to the class.

In the first post you find version 1.35 including the new SortColumn property.

Thank you, Klaus.

I will repeat what I said in an earlier post:

This extended table class is a great contribution to the community. VERY powerful tool! Thank you.

Best regards.

Sandy

Kapelis · Aug 10, 2014

klaus said:
Adding an option to set different column colors instead of 2 row colors is relatively easy.
If you are interested in I could add it.

It would be great to be able to give a different color in a row when a condition occurs. Thank you very much Klaus.

klaus · Aug 10, 2014

To be clear, it will not be possible to set different colors in different rows depending on conditions.
This would need to rewrite the core of the class and probably slow down the scrolling speed.
My proposal is to add the option to set colors for the columns but only one color for the whole column which means the same colors in all rows.

Kapelis · Aug 10, 2014

klaus said:
To be clear, it will not be possible to set different colors in different rows depending on conditions.
This would need to rewrite the core of the class and probably slow down the scrolling speed.
My proposal is to add the option to set colors for the columns but only one color for the whole column which means the same colors in all rows.

This would be useful too, thanks again

klaus · Aug 10, 2014

The first post has been updated with these new features.

Bryan · Aug 15, 2014

I'm using an older version 1.13 at this time. I've had to make a few changes to the class to correct some bugs. Mostly with removal of rows, particularly when at the last row in the table. Anyways, Would it be a problem updating the version to the latest one as far as having to make any significant code changes in the app I working on. My table is loaded and saved from a csv file.
Another question I have is, can an image be put into the background of cells (label background) possibly that will fill the cell if the cell is changed in width. Maybe possibly use an image for the background of an entire column? I want to change the look of the table a bit rather then just change the color of the rows.
Thanks
Bryan

klaus · Aug 15, 2014

Would it be a problem updating the version to the latest one as far as having to make any significant code changes in the app I working on.

No, I don't think so. Aa far as I know all routines remain the same to garanty upward compatibility.

Another question I have is, can an image be put into the background of cells (label background) possibly that will fill the cell if the cell is changed in width.

I don't understand what you mean with possibly that will fill the cell if the cell is changed in width ?
I think it could be, needs to change the class code, but only for rows (same for the whole row) or for columns (same for the whole column).
Depending on the number of rows you could write your own 'Table' class or ScrollView management without the dynamic loading of the labels but with specific Label changes.

Maybe possibly use an image for the background of an entire column?

No, because the rows are loaded and released dynamicaly.

B4A Library [Class] Flexible Table

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