textviewostream.C File Reference

This macro gives an example of how to use the TGTextViewostream widget. More...

Go to the source code of this file.

Detailed Description

This macro gives an example of how to use the TGTextViewostream widget.

Simply type a command in the "Command" text entry, then the output is redirected to theTGTextViewostream. To run it do either:

.x textviewostream.C
.x textviewostream.C++

#include "TGButton.h"
#include "TGButtonGroup.h"
#include "TGLabel.h"
#include "TGNumberEntry.h"
#include "TGTextViewStream.h"
#include "TApplication.h"
#include "TGFrame.h"
#include "TSystem.h"

////////////////////////////////////////////////////////////////////////////////
class TextViewMainFrame : public TGMainFrame
{
protected:
   TGTextButton      *fReset, *fExit;
   TGTextViewostream *fTextView;
   TGVerticalFrame   *fContents;
   TGHorizontalFrame *fButtons, *fCommandFrame;
   TGTextEntry       *fCommand;

public:
   TextViewMainFrame();
   virtual ~TextViewMainFrame() {}
   void Reset();
   void HandleReturn();

   ClassDef(TextViewMainFrame, 0)
};


//______________________________________________________________________________
TextViewMainFrame::TextViewMainFrame() : TGMainFrame(gClient->GetRoot())
{
   // Main test window.

   SetCleanup(kDeepCleanup);

   // Contents
   fContents = new TGVerticalFrame(this);
   fButtons = new TGHorizontalFrame(fContents);

   // TextView
   fTextView = new TGTextViewostream(fContents, 500, 300);
   fContents->AddFrame(fTextView, new TGLayoutHints(kLHintsExpandX | kLHintsExpandY, 5, 5, 5, 0));

   fCommandFrame = new TGHorizontalFrame(fContents);
   fCommand = new TGTextEntry(fCommandFrame, (const char *)"", 20);
   fCommand->Connect("ReturnPressed()", "TextViewMainFrame", this, "HandleReturn()");
   fCommandFrame->AddFrame(new TGLabel(fCommandFrame, "Command: "),
                           new TGLayoutHints(kLHintsCenterY | kLHintsLeft, 5, 5, 5, 5));
   fCommandFrame->AddFrame(fCommand, new TGLayoutHints(kLHintsExpandX, 5, 5, 5, 5));
   fContents->AddFrame(fCommandFrame, new TGLayoutHints(kLHintsExpandX, 5, 5, 5, 5));

   // The button for test
   fReset = new TGTextButton(fButtons, "&Reset");
   fReset->SetToolTipText("Press to clear the command entry\nand the TGTextView", 200);
   fReset->Connect("Clicked()", "TextViewMainFrame", this, "Reset()");
   fButtons->AddFrame(fReset, new TGLayoutHints(kLHintsExpandX | kLHintsTop, 5, 5, 5, 5));

   fExit = new TGTextButton(fButtons, "&Exit");
   fExit->SetToolTipText("Terminate the application", 200);
   fButtons->AddFrame(fExit, new TGLayoutHints(kLHintsExpandX | kLHintsTop, 5, 5, 5, 5));
   fExit->Connect("Pressed()", "TApplication", gApplication, "Terminate()");

   fContents->AddFrame(fButtons, new TGLayoutHints(kLHintsTop | kLHintsExpandX, 0, 0, 0, 0));
   Connect("CloseWindow()", "TApplication", gApplication, "Terminate()");
   DontCallClose();

   AddFrame(fContents, new TGLayoutHints(kLHintsTop | kLHintsExpandX | kLHintsExpandY));
   MapSubwindows();
   Resize(GetDefaultSize());

   SetWindowName("TGTextView Demo");
   MapRaised();
}

//______________________________________________________________________________
void TextViewMainFrame::Reset()
{
   fCommand->Clear();
   fTextView->Clear();
}

//______________________________________________________________________________
void TextViewMainFrame::HandleReturn()
{
   std::string line;
   std::string command = fCommand->GetText();
   *fTextView << gSystem->GetFromPipe(command.c_str()).Data() << std::endl;
   fTextView->ShowBottom();
   fCommand->Clear();
}

//______________________________________________________________________________
void textviewostream()
{
   // Main program.

   new TextViewMainFrame();
}

Author

Bertrand Bellenot 06/01/2015

Definition in file textviewostream.C.