Hi Isidro,
there was indeed a problem in the TGTextView::AddLine() code. I've fixed
this in the CVS version (so please use that).
Your AppendText() should look like:
void MyTextFrame::AppendText(const char* str){
fTextView->AddLine(str);
// scroll when needed to make last line visible
if (fTextView->ToScrYCoord(fTextView->ReturnLineCount()) >
fTextView->GetHeight())
fTextView->SetVsbPosition(fTextView->ReturnLineCount());
}
Cheers, Fons.
Isidro Gonzalez Caballero wrote:
>
> 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
>
> +---------------------------+--------------------------------+
> | Isidro González Caballero | mailto:Isidro.Gonzalez@cern.ch |
> | CERN-EP / Mailbox: F28010 | http://home.cern.ch/~iglez/ |
> | 1211 Geneva 23 | -o- |
> | Switzerland | Tel: +41 22 76 73060, 73316 |
> +---------------------------+--------------------------------+
--
Org: CERN, European Laboratory for Particle Physics.
Mail: 1211 Geneve 23, Switzerland
E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248
WWW: http://root.cern.ch/~rdm/ Fax: +41 22 7677910
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