swt - Set Controls with arbitrary positions on CTabItem -

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I'm new to SWT, and I need to control control conditions on CTABItem.

I have used the following code, but it seems that it has no positioning effect, it just adds component (0, 0) 

  label User name = new label (folder, SWT.NONE); UserName.setText ("user name"); UserName.setBounds (10, 200, 200, 50); Item.setControl (username);    
 
 
 You have to set the layout manager on the  folder , example: 
 
  folder. Saleout (new gridlate ());  
 
 If you want to give a certain dimension to the control, consider giving it the layout data, eg: 
 
  GridData gd = new GridData () ; Gd.height = 50; UserName.setLayoutData (GD);  
 
 I'm not sure that  items  is in your example, but this is not necessary.

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