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 · Sep 6, 2014

I want to propose, on your wonderful table class, to add the ability to sum the numeric columns, putting a footer panel as the header panel.

I'm afraid that this is too specialized and will make the class to complicated.

Bryan · Sep 10, 2014

klaus said:
There is no column width changed event.
Column colors can be set since version 1.36.

Yes, LoadTableFromCSV2 has as the last parameter AutomaticWidths, set it to true.

I've been trying to make my table look good on different devices so I tried using AutomaticWidths which works very well. The only issue I have is the table or Scrollview itself as a whole. What would be the best way if possible to automatically center table horizontally and have the table width resize to the combined widths of my columns. I only use 4 columns in my table. So, my table does not need to be the entire width of my activity. Especially in landscape orientation if used on a tablet. It looks kind of odd if my table is stretched out to fill the screen and my first column is at 0 top and 0 left leaving half the screen blank or showing the unfilled portion of the scrollview that does not contain any columns. This is where I think it would look better if I could resize and center the table along with using AutomaticWidths for columns.

Thanks, Bryan

klaus · Sep 10, 2014

You can place the whole table whereever you want or need, but you must to do it in your code.
You can read the inner width with Table1.HeaderPanel.Width.
You can then reset the Left, Top, Width and Height properties.

Bryan · Sep 11, 2014

klaus said:
You can place the whole table whereever you want or need, but you must to do it in your code.
You can read the inner width with Table1.HeaderPanel.Width.
You can then reset the Left, Top, Width and Height properties.

This works very good now for keeping my table centered. There is another problem to resolve after this. If a row is added or removed from the table then somehow the table needs to be refreshed so the column widths can adjust to any text changes that might have occurred. Is there another way to do this other then reloading the table again from my csv file?

Thanks

klaus · Sep 11, 2014

Is there another way to do this other then reloading the table again from my csv file?

No.

mat2175 · Sep 14, 2014

Hi Klaus, is there a way to deselect a row. I tried the code below but cant get it to work.

Thanks

B4X:

Dim rc as RowCol
rc.Row = -1
Table1.SelectRow(rc)

klaus · Sep 18, 2014

Sorry for answering only today, but I was on travel since Sunday.
The original Table doesn't allow to unselect a row.
In the Class subroutine SelectRow comment the Return line like below, then you can unselect a row.

B4X:

Public Sub SelectRow(rc As RowCol)
    Dim prevIndex As Int
    Dim prev As Int ' if we select an alreday selected row, prev will be rc.row, else will be -1
   
    prevIndex = SelectedRows.indexof(rc.Row)     ' -1 if selecting not a selected row   
    If (prevIndex <> -1 AND IsMultiSelect = False) Then
        ' if IsMultiSelect = True no column change, only if IsMultiSelect = False
        SelectedCol = rc.col
        If visibleRows.ContainsKey(rc.Row) Then
            HideRow(rc.Row)
            ShowRow(rc.Row)
        End If
'        Return
    End If

mat2175 · Sep 18, 2014

Thanks Klaus that did the trick.

merlin2049er · Sep 19, 2014

Great class. I was looking at it late last night, got my tabled filled using sub filltable from example v1_30.
Just wondering why it's called in activity resume? I've got a menu option, that is going bring up this table with the current (refreshed) results.

The example in table v1_30, doesn't refresh the results. I'll take a look at it again.

klaus · Sep 19, 2014

The latest version of the class is 1.37 !
What exactly is the problem ?

merlin2049er · Sep 19, 2014

Hmm, yes I've got the latest class but I was looking at an old example in the thread.

Basically want to fill a table with a query, and refresh its result (when I bring it up again). I believe it said the db was already opened or re-opened.

klaus · Sep 19, 2014

Without seeing your code it's impossible to give you a concrete advice.

bobsimoneau · Sep 19, 2014

klaus said:
The latest version of the class is 1.37 !
What exactly is the problem ?

The 1st message has Version 1.36, how do I get Version 1.37 ! Thanks for all the great work you do.

merlin2049er · Sep 19, 2014

Ok, I see in your example in v1_36 you FillTableSQLite on activity create, v1_30 had it in activity resume.

I'll move it, and add a refresh button to reload the table (clear & rerun the FillTableSQLite )

klaus · Sep 19, 2014

bobsimoneau said:
The 1st message has Version 1.36, how do I get Version 1.37

Sorry, version 1.37 is my latest version not yet published, will come soon.

merlin2049er · Sep 19, 2014

Ok, I solved the problem. I was closing the db connection after inserting records into it.
Just removed that, and it works without any problems...( I can rerun that query, and fill in the table...)

java.lang.IllegalStateException: attempt to re-open an already-closed object: SQLiteDatabase: /storage/emulated/0/Android/data/solarble.com/files/solarlog.db

tdocs2 · Oct 5, 2014

Greetings, all, and Hello, Klaus.

I use this class quite frequently both with csv files and SQLite tables - great work for Erel and Klaus. Thank you, both.

Question:
I just starting using RDC. Is there an easy way to get the results from the command in RDC into the table? (like Sub LoadSQLiteDB)?

Any and all help is welcomed.

Sandy

klaus · Oct 5, 2014

Didn't you have a look at the first post ?
There you find a routine written by LucaMs.
I didn't add it to the class because it uses a special Type.

tdocs2 · Oct 5, 2014

Hello, Klaus.

I do not know how I could have possibly missed it! It could not possibly be more obvious. I wish I could take my question back! I just started using RDC a few days ago.

I use your class QUITE frequently, and once again, I express my gratitude for your brilliant and comprehensive work.

Best regards.

Sandy

Stolli0815 · Oct 19, 2014

Hello Klaus.

Great job, Thanks!

Is there a posibility to keep column 0 fixed, as the Header is?
Currently I programmed with show/hide column the functionality. But unfortunatelly the internal ScrollView2D object consumes the "scroll - events" of the underlaying panel, so I can't react on the touch event of the panel.

I added to SV_ScrollChanged the Callback
If SubExists(Callback, Event & "_TableScroll") Then
CallSub3(Callback, Event & "_TableScroll", PosX, PosY)
End If

That enables me to react on the Scroll - Event from the Main Application.

Maybe a good idea to add this as an additional functionality. (Feel free)

BR, Chris

B4A Library [Class] Flexible Table

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