[ROOT] TGTextView

From: Isidro Gonzalez Caballero (Isidro.Gonzalez.Caballero@cern.ch)
Date: Wed Aug 09 2000 - 20:37:33 MEST


Hi,
	I am trying to build a window where to redirect the standard
output. So, I constructed a new class in which I included a TGTextView.
Whenever something is writen to a special output buffer, it forwards the
message to this TGTextView with code like:


void MyTextFrame::AppendText(const char* str){
  fTextView->AddLine(str);
  //Do I need the following line. It is never clear when it should be
  //called
  fClient->NeedRedraw(fTextView);
}

The problem is that this does nothing!... The only way to make it work is
having something like:

void MyTextFrame::AppendText(const char* str){
  //fText is a TString
  fText += str;
  fTextView->LoadBuffer(fText);
  //Do I need the following line. It is never clear when it should be
  //called
  fClient->NeedRedraw(fTextView);
}

But this slows down the program when the output is big, and always places
the scroll bar at the begining. I am compiling with:

ROOT Version   2.25/01     9 August 2000 
CINT/ROOT C/C++ Interpreter version 5.14.44, Jul 18 2000
Linux RH 6.1

Any ideas on making this work properly. Thank you very much:

		Isidro

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| Isidro González Caballero | mailto:Isidro.Gonzalez@cern.ch |
| CERN-EP / Mailbox: F28010 | http://home.cern.ch/~iglez/    |
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