B4J Question TableView Content Resize

[BarryW]

Hi.

After loading my data on tableview ( 20 to 30 columns all needed ) it resize the columns width into equal based on numbers of column.

But when i double click the column header separator after loading the data it auto size the width of that column based on its content. Is there something like that to do it tru codes.

Tnx.

 

[Erel]

You can use this code to call the private method that auto-resizes a column:

Sub ResizeToFit(tv As TableView, ColumnIndex As Int)
   Dim tvjo As JavaObject = tv
   Dim r As Reflector
   r.Target = tvjo.RunMethod("getSkin", Null)
   r.RunMethod4("resizeColumnToFitContent", Array(tvjo.RunMethodJO("getColumns", Null).RunMethod("get", Array(ColumnIndex)), -1), _
      Array As String("javafx.scene.control.TableColumn", "java.lang.int"))
End Sub

Depends on JavaObject and jReflection libraries.

 

[BarryW]

I got this error when i used this code

    java.lang.NullPointerException
    at com.sun.javafx.scene.control.skin.TableViewSkin.resizeColumnToFitContent(TableViewSkin.java:257)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4j.agraham.reflection.Reflection.runmethod(Reflection.java:168)
    at anywheresoftware.b4j.agraham.reflection.Reflection.RunMethod4(Reflection.java:932)
    at felco.prj.dar.review._resizetofit(review.java:254)
    at felco.prj.dar.review._btnload_action(review.java:102)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:93)
    at anywheresoftware.b4a.BA$2.run(BA.java:165)
    at com.sun.javafx.application.PlatformImpl.lambda$null$174(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$175(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$149(WinApplication.java:191)
    at java.lang.Thread.run(Thread.java:745)

 

[Erel]

Can you upload your project (File - export as zip)?

 

[BarryW]

Here is my project. I create a sample because my actual project connects to a database but they have same error.

Try to click the load button twice.

 

[Erel]

It fails because you are hiding the first column. You need to skip it when you call ResizeToFit:

'i = 1 instead of 0
For i = 1 To TableView1.ColumnsCount -1
   ResizeToFit(TableView1, i)
Next

 

[JackKirk]

It would appear that resizeColumnToFitContent no longer works as of java 9, refer to:

https://stackoverflow.com/questions...o-override-tableview-resizecolumntofitcontent

Any one have a simple workaround?

Thanks in anticipation...