Logo ROOT   6.10/09
Reference Guide
guiWithCINT.C File Reference

Detailed Description

A simple example of entering CINT commands and having the CINT output in a ROOT GUI application window.

An editable combo box is used as a CINT prompt, a text view widget displays the command output.

#include <iostream>
#include <TApplication.h>
#include <TRint.h>
#include <TROOT.h>
#include <TSystem.h>
#include <TGTextEntry.h>
#include <TGTextView.h>
#include <TGClient.h>
#include <TGButton.h>
#include <TGFrame.h>
#include <TGLayout.h>
#include <TGWindow.h>
#include <TGLabel.h>
#include <TString.h>
#include <TGComboBox.h>
#include <Getline.h>
class IDList {
private:
Int_t fID; //create widget Id(s)
public:
IDList() : fID(0) {}
~IDList() {}
Int_t GetUnID(void) { return ++fID; }
};
class MyApplication : public TGMainFrame {
private:
TGTextButton *fExit;
IDList fIDs;
TGComboBox *fComboCmd; // CINT command combobox
TGTextBuffer *fCommandBuf; // text buffer in use
TGTextEntry *fCommand; // text entry for CINT commands
TGTextView *fTextView; // display CINT output
TString fName; // name of temp created file
public:
MyApplication(const TGWindow *p, UInt_t w, UInt_t h);
virtual ~MyApplication();
void DoExit();
void DoEnteredCommand();
ClassDef(MyApplication, 0)
};
MyApplication::MyApplication(const TGWindow *p, UInt_t w, UInt_t h)
: TGMainFrame(p, w, h)
{
SetCleanup(kDeepCleanup);
Connect("CloseWindow()", "MyApplication", this, "DoExit()");
DontCallClose();
TGHorizontalFrame *fHL2 = new TGHorizontalFrame(this, 70, 100);
AddFrame(fHL2, new TGLayoutHints(kLHintsNormal, 5, 5, 5, 5));
TGLabel *fInlabel = new TGLabel(fHL2, "CINT Prompt:");
fHL2->AddFrame(fInlabel, new TGLayoutHints(kLHintsCenterY));
TGLabel *fOutlabel = new TGLabel(this, "Output Window:");
AddFrame(fOutlabel);
fCommandBuf = new TGTextBuffer(256);
fComboCmd = new TGComboBox(fHL2, "", fIDs.GetUnID());
fCommand = fComboCmd->GetTextEntry();
fComboCmd->Resize(450, fCommand->GetDefaultHeight());
fHL2->AddFrame(fComboCmd, new TGLayoutHints(kLHintsCenterY | kLHintsExpandX, 20,0,0,0));
TString hist(Form("%s/.root_hist", gSystem->UnixPathName(gSystem->HomeDirectory())));
FILE *fhist = fopen(hist.Data(), "rt");
if (fhist) {
char histline[256];
while (fgets(histline, 256, fhist)) {
histline[strlen(histline)-1] = 0; // remove trailing "\n"
fComboCmd->InsertEntry(histline, 0, -1);
}
fclose(fhist);
}
Pixel_t backpxl;
gClient->GetColorByName("#c0c0c0", backpxl);
fTextView = new TGTextView(this, 500, 94, fIDs.GetUnID(), kFixedWidth | kFixedHeight);
fTextView->SetBackground(backpxl);
AddFrame(fTextView, new TGLayoutHints(kLHintsExpandX));
TGHorizontalFrame *fHL3 = new TGHorizontalFrame(this, 70, 150, kFixedWidth);
fExit = new TGTextButton(fHL3, "&Exit", fIDs.GetUnID());
fExit->Connect("Clicked()", "MyApplication", this, "DoExit()");
AddFrame(fHL3, new TGLayoutHints(kLHintsCenterX | kLHintsCenterY, 1, 1, 1, 1));
SetWindowName("GUI with CINT Input/Output");
MapSubwindows();
Resize(GetDefaultSize());
MapWindow();
fCommand->Connect("ReturnPressed()", "MyApplication", this, "DoEnteredCommand()");
fName = Form("%soutput.log", gSystem->WorkingDirectory());
};
MyApplication::~MyApplication()
{
// Destructor.
Cleanup();
}
void MyApplication::DoExit()
{
// Close application window.
gSystem->Unlink(fName.Data());
}
void MyApplication::DoEnteredCommand()
{
// Execute the CINT command after the ENTER key was pressed.
const char *command = fCommand->GetTitle();
TString prompt;
if (strlen(command)) {
// form temporary file path
prompt = ((TRint*)gROOT->GetApplication())->GetPrompt();
FILE *cintout = fopen(fName.Data(), "a+t");
if (cintout) {
fputs(Form("%s%s\n",prompt.Data(), command), cintout);
fclose(cintout);
}
gSystem->RedirectOutput(fName.Data(), "a");
gROOT->ProcessLine(command);
fComboCmd->InsertEntry(command, 0, fIDs.GetUnID());
Gl_histadd((char *)command);
fTextView->LoadFile(fName.Data());
if (fTextView->ReturnLineCount() > 10)
fTextView->SetVsbPosition(fTextView->ReturnLineCount());
fCommand->Clear();
} else {
printf("No command entered\n");
}
fTextView->ShowBottom();
}
void guiWithCINT()
{
new MyApplication(gClient->GetRoot(),600,300);
}
Author
Ilka Antcheva 06/07/2007

Definition in file guiWithCINT.C.