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.basic4ppc.com/forum/addi...view-supports-tables-any-size.html#post110901

The class depend on following libraries:
- StringUtils (standard)
- SQL (standard)
- JavaObject (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 --> 3.30 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: 2021.06.28 Version 3.29
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: 792
  • Table.bas
    129.6 KB · Views: 239
  • TableV3_30.zip
    105.6 KB · Views: 420
Last edited:

klaus

Expert
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Longtime User
How do you draw borders and row lines? Is this using built in class/sub or you draw it manually?
These lines are not drawn, it is the space between the Labels in the ScrollView.Panel and the color is ScrollView.Panel.Color.
Is that possible to display data to users, just a few number rows that fits screen size, and display another data when users scroll it?
This is allready the case, See HERE in the original thread, The Lable content is updated when the user scrolls.
 

incendio

Well-Known Member
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Longtime User
This is allready the case, See HERE in the original thread, The Lable content is updated when the user scrolls.

If I understood correctly, the label is reused and updated when user scroll.
This is not what I have in mind.

On class source code, Sub LoadSQLiteDB, all data retrieved and then add to row. Then Sub AddRow handle how many data need to display on screen.

What I mean here, Sub LoadSQLiteDB, retrieve only data that will display on the screen, and when users scrolls, data retrieved again. In this way (if this is possible,combine with this idea http://www.basic4ppc.com/android/forum/threads/class-flexible-table.30649/page-12#post-250615), no matter how large the data is, I am sure it will always fast.
 
Last edited:

klaus

Expert
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Longtime User
Sorry, but I see two problems.
- My skills in SQLite are not that advanced.
- As this procedure will need to change the SV_ScrollChanged routine, the class would become a specialized one for SQL usage only.
 

mat2175

Member
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Longtime User
I want to remove the whole row that the user selects using a button click event. How would i go about this any examples would be appreciated.
Thanks.
 

Inman

Well-Known Member
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Longtime User
I am trying to create a table with just 2 columns and 2 rows. I add the data manually using AddRow and NOT with one of the Load functions. While the header is created correctly and I see the status message at the bottom saying "2 rows", the table is empty without any rows. I am using v1.33. Any idea?
 

Inman

Well-Known Member
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Longtime User
Ah yes I didn't do that. Now it works.

I didn't find it in the example, which is why I didn't add it. I was under the impression that it automatically sets the width based on table width and number of columns.
 

Reinierus

Member
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Longtime User
Hello.
I am using the table in a panel with AHPageContainer and I get this error: java.lang.NullPointerException

I think that it is because there is a right order in the program lines to make the table works or the table doesn't work in the PageContainer.

Can someone tell me how to fix that? (I have lots of lines)

Best regards
 

luismora

New Member
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Longtime User
It working with Panel. I'm just add


'Adds to Panel
Public Sub AddToPanel(Act As Panel, Left As Int, Top As Int, Width As Int, Height As Int)
visible = True
Header.Initialize("")
Header.Color = TableColor
Act.AddView(Header, Left, Top , Width, RowHeight)
Act.AddView(SV, Left, Top + RowHeight, Width, Height - RowHeight)
ColumnWidth = SV.Width / NumberOfColumns

SV_ScrollChanged(0)

End Sub
 

klaus

Expert
Licensed User
Longtime User
I suppose that you changed the code in the Table Class.
What version of the Table Class are you using ?
You don't need to modify the class code.
Use simply something like Table1.AddToActivity(pnlTable, 0, 0, pnlTable.Width, pnlTable.Height) in the calling activity.
In the AddToActivity routine Act can be either an activity or a panel.
In the recent versions of the Table Class there is also the AddToView routine which does the same.
 

Reinierus

Member
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Longtime User
Hello Klaus.
I change to WebView table to show the data. If I need to use the Table Class, I will ask again.

Thanks.
 

luismora

New Member
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Longtime User
Hello Klaus.

You have the right. I was using a very old version.

Thank you I saved me many days of works
 

stu14t

Active Member
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Longtime User
I'm having problems with trying to delete the last row of the table. My app dynamically adds rows to the table as data is collected by the user. The user also has the function to remove the last row of the data input. Now that's fine if there are more than two rows. As soon as you get to the last visible row and press the Clear Last button I get an index error:
B4X:
The battery level is: 100
ShowRow: -1
Error occurred on line: 391 (table)
java.lang.ArrayIndexOutOfBoundsException: length=12; index=-1
    at java.util.ArrayList.get(ArrayList.java:310)
    at anywheresoftware.b4a.objects.collections.List.Get(List.java:117)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:636)
    at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:302)
    at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:238)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:121)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:163)
    at anywheresoftware.b4a.BA.raiseEvent(BA.java:159)
    at anywheresoftware.b4a.objects.ViewWrapper$1.onClick(ViewWrapper.java:66)
    at android.view.View.performClick(View.java:4637)
    at android.view.View$PerformClick.run(View.java:19422)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5586)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1268)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1084)
    at dalvik.system.NativeStart.main(Native Method)

Here is the code that implements the row delete and it works fine but for the last row remaining in the table
B4X:
Sub ButtonCL_Click
    Pen(TestPoint) = 0 ' This just removes the data that will be deleted from the array
    TotBlows(TestPoint) = 0 ' Same as above
    Dim Row1 As String
    If TestPoint > 0 Then ' This stops you going beyond the start of the table / array
        TestPoint = TestPoint - 1
        Row1 = CStr(TestPoint) 'Have to pass a string to the Table class
        Table1.RemoveRow(Row1) '
        lblResult.Text = ""
    Else
        Msgbox2("You Are at the Start of the Dataset","","OK","","",LoadBitmap(File.DirAssets,"Exclamation-icon.png"))
    End If
    'Display_upDate
End Sub

Any ideas I'm banging my head against the wall
 

klaus

Expert
Licensed User
Longtime User
In the Table class code change in the RemoveRow routine this code
B4X:
maxVisibleRow = Min(maxVisibleRow, Data.Size - 1) ' adjust visible rows
minVisibleRow = Min(minVisibleRow, Data.Size - 1)
For i = minVisibleRow To maxVisibleRow ' show all visible rows (should select the ones needed to be selected as well)
'If (IsMultiSelect OR sr = i) Then HideRow(i) ' in multi select we made too much mess, we need to redraw the whole view (can be optimized if needed!)
    ShowRow(i)
Next
by this one
B4X:
If Data.Size > 0 Then
    maxVisibleRow = Min(maxVisibleRow, Data.Size - 1) ' adjust visible rows
    minVisibleRow = Min(minVisibleRow, Data.Size - 1)
    For i = minVisibleRow To maxVisibleRow ' show all visible rows (should select the ones needed to be selected as well)
    'If (IsMultiSelect OR sr = i) Then HideRow(i) ' in multi select we made too much mess, we need to redraw the whole view (can be optimized if needed!)
        ShowRow(i)
    Next
End If
 

tdocs2

Well-Known Member
Licensed User
Longtime User
Greetings, all. Thank you in advance for answering my question.

I have been working extensively with the Flexible Table Class. It is GREAT!!! Thank you, Klaus, for adding the valuable added functionality to the original Table Class. Thank you, Erel, not only for the original table class but also for the wonderful development environment of B4A and Melamoud for his participation in the Table Class.

Question:
Can I have a table with no header row? I have tried but to no avail. I can get a "blank" header row, but I want no header row.

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

Best regards.

Sandy
 
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