src/XGUI/XGUI_OperationMgr.cpp

   1 // File:        XGUI_OperationMgr.h
   2 // Created:     20 Apr 2014
   3 // Author:      Natalia ERMOLAEVA
   4
   5 #include "XGUI_OperationMgr.h"
   6
   7 #include "ModuleBase_Operation.h"
   8
   9 #include <QMessageBox>
  10
  11 XGUI_OperationMgr::XGUI_OperationMgr(QObject* theParent)
  12 : QObject(theParent)
  13 {
  14 }
  15
  16 XGUI_OperationMgr::~XGUI_OperationMgr()
  17 {
  18 }
  19
  20 ModuleBase_Operation* XGUI_OperationMgr::currentOperation() const
  21 {
  22   return myOperations.count() > 0 ? myOperations.last() : 0;
  23 }
  24
  25 bool XGUI_OperationMgr::hasOperation() const
  26 {
  27   return (myOperations.count() > 0) && (myOperations.last() != NULL);
  28 }
  29
  30 int XGUI_OperationMgr::operationsCount() const
  31 {
  32   return myOperations.count();
  33 }
  34
  35 bool XGUI_OperationMgr::startOperation(ModuleBase_Operation* theOperation)
  36 {
  37   if (!canStartOperation(theOperation))
  38     return false;
  39
  40   myOperations.append(theOperation);
  41
  42   connect(theOperation, SIGNAL(stopped()), this, SLOT(onOperationStopped()));
  43   connect(theOperation, SIGNAL(started()), this, SIGNAL(operationStarted()));
  44
  45   theOperation->start();
  46   return true;
  47 }
  48
  49 void XGUI_OperationMgr::resumeOperation(ModuleBase_Operation* theOperation)
  50 {
  51   connect(theOperation, SIGNAL(stopped()), this, SLOT(onOperationStopped()));
  52   connect(theOperation, SIGNAL(started()), this, SIGNAL(operationStarted()));
  53
  54   theOperation->resume();
  55 }
  56
  57 bool XGUI_OperationMgr::canStartOperation(ModuleBase_Operation* theOperation)
  58 {
  59   bool aCanStart = true;
  60   ModuleBase_Operation* aCurrentOp = currentOperation();
  61   if (aCurrentOp && !theOperation->isGranted())
  62   {
  63     int anAnswer = QMessageBox::question(0, tr("Operation launch"),
  64                                 tr("Previous operation is not finished and will be aborted"),
  65                                 QMessageBox::Ok, QMessageBox::Cancel);
  66     if (anAnswer == QMessageBox::Ok) {
  67       aCurrentOp->abort();
  68     } else {
  69       aCanStart = false;
  70     }
  71   }
  72   return aCanStart;
  73 }
  74
  75 void XGUI_OperationMgr::onOperationStopped()
  76 {
  77   ModuleBase_Operation* aSenderOperation = dynamic_cast<ModuleBase_Operation*>(sender());
  78   ModuleBase_Operation* anOperation = currentOperation();
  79   if (!aSenderOperation || !anOperation || aSenderOperation != anOperation )
  80     return;
  81
  82   emit operationStopped(anOperation);
  83
  84   myOperations.removeAll(anOperation);
  85   anOperation->deleteLater();
  86
  87   // get last operation which can be resumed
  88   ModuleBase_Operation* aResultOp = 0;
  89   QListIterator<ModuleBase_Operation*> anIt(myOperations);
  90   anIt.toBack();
  91   while(anIt.hasPrevious())
  92   {
  93     ModuleBase_Operation* anOp = anIt.previous();
  94     if (anOp) {
  95       aResultOp = anOp;
  96       break;
  97     }
  98   }
  99   if (aResultOp)
 100     resumeOperation(aResultOp);
 101 }