first primitive file watcher implemented

src/musrgui/PFileWatcher.cpp

@@ -0,0 +1,117 @@
+/****************************************************************************
+
+  PFileWatcher.cpp
+
+  Author: Andreas Suter
+  e-mail: andreas.suter@psi.ch
+
+  $Id$
+
+*****************************************************************************/
+
+/***************************************************************************
+ *   Copyright (C) 2009 by Andreas Suter                                   *
+ *   andreas.suter@psi.ch                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#include <qfileinfo.h>
+#include <qstring.h>
+#include <qdatetime.h>
+#include <qtimer.h>
+
+#include <qmessagebox.h>
+
+#include "PFileWatcher.h"
+
+//----------------------------------------------------------------------------------------------------
+/**
+ * <p>
+ */
+PFileWatcher::PFileWatcher(const QString &fileName, const QDateTime &lastModified) : fFileName(fileName), fLastModified(lastModified)
+{
+  fFileInfo = 0;
+  fFileInfo = new QFileInfo(fFileName);
+  if (!fFileInfo) {
+    fValid = false;
+  }
+}
+
+//----------------------------------------------------------------------------------------------------
+/**
+ * <p>
+ */
+PFileWatcher::~PFileWatcher()
+{
+  if (fFileInfo) {
+    delete fFileInfo;
+    fFileInfo = 0;
+  }
+}
+
+//----------------------------------------------------------------------------------------------------
+/**
+ * <p>
+ */
+bool PFileWatcher::modified()
+{
+  bool result = false;
+
+  fFileInfo->refresh();
+
+  if (fFileInfo->lastModified() > fLastModified)
+    result = true;
+
+  return result;
+}
+
+//----------------------------------------------------------------------------------------------------
+/**
+ * <p>
+ */
+void PFileWatcher::modified(int timeout)
+{
+  fTimerCheck = new QTimer(this);
+
+  connect( fTimerCheck, SIGNAL(timeout()), this, SLOT(checkIfModified()) );
+  QTimer::singleShot(timeout * 1000, this, SLOT(stopFileCheck()));
+
+  fTimerCheck->start(1000);
+}
+
+//----------------------------------------------------------------------------------------------------
+/**
+ * <p>
+ */
+void PFileWatcher::checkIfModified()
+{
+  fFileInfo->refresh();
+
+  if (fFileInfo->lastModified() > fLastModified) {
+    fTimerCheck->stop();
+    emit changed();
+  }
+}
+
+//----------------------------------------------------------------------------------------------------
+/**
+ * <p>
+ */
+void PFileWatcher::stopFileCheck()
+{
+  fTimerCheck->stop();
+}

src/musrgui/PFileWatcher.h

@@ -0,0 +1,66 @@
+/****************************************************************************
+
+  PFileWatcher.h
+
+  Author: Andreas Suter
+  e-mail: andreas.suter@psi.ch
+
+  $Id$
+
+*****************************************************************************/
+
+/***************************************************************************
+ *   Copyright (C) 2009 by Andreas Suter                                   *
+ *   andreas.suter@psi.ch                                                  *
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ *   This program is distributed in the hope that it will be useful,       *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU General Public License for more details.                          *
+ *                                                                         *
+ *   You should have received a copy of the GNU General Public License     *
+ *   along with this program; if not, write to the                         *
+ *   Free Software Foundation, Inc.,                                       *
+ *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
+ ***************************************************************************/
+
+#ifndef _PFILEWATCHER_H_
+#define _PFILEWATCHER_H_
+
+#include <qobject.h>
+#include <qfileinfo.h>
+
+class PFileWatcher : public QObject
+{
+  Q_OBJECT
+
+  public:
+    PFileWatcher(const QString &fileName, const QDateTime &lastModified);
+    virtual ~PFileWatcher();
+
+    virtual bool isValid() { return fValid; }
+    virtual bool modified();
+    virtual void modified(int timeout);
+
+  signals:
+    void changed();
+
+  private slots:
+    void checkIfModified();
+    void stopFileCheck();
+
+  private:
+    bool       fValid;
+    QString    fFileName;
+    QFileInfo *fFileInfo;
+    QDateTime  fLastModified;
+
+    QTimer    *fTimerCheck;
+};
+
+#endif // _PFILEWATCHER_H_

src/musrgui/PSubTextEdit.cpp

@@ -60,6 +60,7 @@ PSubTextEdit::PSubTextEdit(PAdmin *admin,
                            QTextEdit(parent, name),
                            fAdmin(admin)
 {
+//  fLastModified = QDateTime::fromString("1900-01-01 00:00:00");
 }
 
 //----------------------------------------------------------------------------------------------------

src/musrgui/PSubTextEdit.h

@@ -33,6 +33,7 @@
 #define _PSUBTEXTEDIT_H_
 
 #include <qtextedit.h>
+#include <qdatetime.h>
 
 #include "PAdmin.h"
 
@@ -43,6 +44,9 @@ class PSubTextEdit : public QTextEdit
   public:
     PSubTextEdit(PAdmin *admin = 0, QWidget *parent = 0, const char *name = 0);
 
+    void setLastModified(const QDateTime &lastModified) { fLastModified = lastModified; }
+    QDateTime getLastModified() const { return fLastModified; }
+
   protected:
     virtual QPopupMenu *createPopupMenu( const QPoint &pos);
 
@@ -62,6 +66,7 @@ class PSubTextEdit : public QTextEdit
 
   private:
     PAdmin *fAdmin;
+    QDateTime fLastModified;
 };
 
 #endif // _PSUBTEXTEDIT_H_

src/musrgui/PTextEdit.cpp

@@ -29,8 +29,10 @@
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  ***************************************************************************/
 
+/*
 #include <iostream>
 using namespace std;
+*/
 
 #include <qtextedit.h>
 #include <qaction.h>
@@ -57,6 +59,7 @@ using namespace std;
 #include <qpixmap.h>
 
 #include "PTextEdit.h"
+#include "PFileWatcher.h"
 #include "PSubTextEdit.h"
 #include "PAdmin.h"
 #include "PFindDialog.h"
@@ -109,6 +112,8 @@ PTextEdit::PTextEdit( QWidget *parent, const char *name )
   fMsr2DataParam = 0;
   fFindReplaceData = 0,
 
+  fFileWatcher = 0;
+
   fKeepMinuit2Output = false;
   fDump = 0; // 0 = no dump, 1 = ascii dump, 2 = root dump
 
@@ -134,6 +139,8 @@ PTextEdit::PTextEdit( QWidget *parent, const char *name )
   } else {
     fileNew();
   }
+
+  connect( fTabWidget, SIGNAL( currentChanged(QWidget*) ), this, SLOT( checkIfModified(QWidget*) ));
 }
 
 //----------------------------------------------------------------------------------------------------
@@ -150,6 +157,10 @@ PTextEdit::~PTextEdit()
     delete fFindReplaceData;
     fFindReplaceData = 0;
   }
+  if (fFileWatcher) {
+    delete fFileWatcher;
+    fFileWatcher = 0;
+  }
 }
 
 //----------------------------------------------------------------------------------------------------
@@ -394,7 +405,10 @@ void PTextEdit::load( const QString &f, const int index )
   if ( !QFile::exists( f ) )
     return;
 
+  QFileInfo info(f);
+
   PSubTextEdit *edit = new PSubTextEdit( fAdmin );
+  edit->setLastModified(info.lastModified());
   edit->setTextFormat( PlainText );
   edit->setFamily("Courier");
   edit->setPointSize(11); // 11pt
@@ -524,6 +538,12 @@ void PTextEdit::fileReload()
     fileClose(false);
     load(fln, index);
   }
+
+  // clean up file watcher object if present
+  if (fFileWatcher) {
+    delete fFileWatcher;
+    fFileWatcher = 0;
+  }
 }
 
 //----------------------------------------------------------------------------------------------------
@@ -1534,6 +1554,11 @@ void PTextEdit::musrT0()
   cmd += str + " &";
 
   system(cmd.latin1());
+
+  QString fln = *fFilenames.find( currentEditor() );
+  fFileWatcher = new PFileWatcher(fln, currentEditor()->getLastModified());
+  fFileWatcher->modified(3600);
+  connect(fFileWatcher, SIGNAL( changed() ), this, SLOT( fileReload() ));
 }
 
 //----------------------------------------------------------------------------------------------------
@@ -1675,7 +1700,7 @@ void PTextEdit::fontChanged( const QFont &f )
 /**
  * <p>
  */
-void PTextEdit::textChanged()
+void PTextEdit::textChanged(const bool forced)
 {
   if (!currentEditor())
     return;
@@ -1691,6 +1716,10 @@ void PTextEdit::textChanged()
   if ((fTabWidget->label(fTabWidget->currentPageIndex()).find("*") < 0) &&
       currentEditor()->isModified())
     fTabWidget->setTabLabel(fTabWidget->currentPage(), tabLabel+"*");
+
+  if ((fTabWidget->label(fTabWidget->currentPageIndex()).find("*") < 0) &&
+      forced)
+    fTabWidget->setTabLabel(fTabWidget->currentPage(), tabLabel+"*");
 }
 
 //----------------------------------------------------------------------------------------------------
@@ -1744,6 +1773,30 @@ void PTextEdit::replaceAll()
   currentEditor()->setCursorPosition(currentPara, currentIndex);
 }
 
+//----------------------------------------------------------------------------------------------------
+/**
+ * <p>
+ */
+void PTextEdit::checkIfModified(QWidget*)
+{
+  if ( fTabWidget->currentPage() && fTabWidget->currentPage()->inherits( "PSubTextEdit" ) ) {
+    QString fln = *fFilenames.find( currentEditor() );
+    PFileWatcher fw(fln, currentEditor()->getLastModified());
+    if (fw.isValid()) {
+      if (fw.modified()) {
+        int result = QMessageBox::information( this, "**INFO**",
+                                               "File modified on disk. Do you want to reload it?",
+                                               QMessageBox::Yes,  QMessageBox::No);
+        if (result == QMessageBox::Yes) {
+          fileReload();
+        } else {
+          textChanged(true);
+        }
+      }
+    }
+  }
+}
+
 //----------------------------------------------------------------------------------------------------
 // END
 //----------------------------------------------------------------------------------------------------

src/musrgui/PTextEdit.h

@@ -36,6 +36,7 @@
 #include <qmap.h>
 
 #include "musrgui.h"
+#include "PFileWatcher.h"
 
 class PSubTextEdit;
 class PAdmin;
@@ -109,12 +110,14 @@ private slots:
   void helpAbout();
 
   void fontChanged( const QFont &f );
-  void textChanged();
+  void textChanged(const bool forced = false);
 
   void replace();
   void replaceAndClose();
   void replaceAll();
 
+  void checkIfModified(QWidget*);
+
 private:
   PAdmin *fAdmin;
 
@@ -129,6 +132,8 @@ private:
 
   QTabWidget *fTabWidget;
   QMap<PSubTextEdit*, QString> fFilenames;
+
+  PFileWatcher *fFileWatcher;
 };
 
 

src/musrgui/musrgui.pro

@@ -14,6 +14,7 @@ CONFIG += qt \
     debug
 
 HEADERS = musrgui.h \
+    PFileWatcher.h \
     PTextEdit.h \
     PSubTextEdit.h \
     PAdmin.h \
@@ -32,7 +33,8 @@ HEADERS = musrgui.h \
     PMsr2DataDialog.h \
     PGetPlotDialog.h
 
-SOURCES = PTextEdit.cpp \
+SOURCES = PFileWatcher.cpp \
+    PTextEdit.cpp \
     PSubTextEdit.cpp \
     PAdmin.cpp \
     PFindDialog.cpp \