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::startOperation(ModuleBase_Operation* theOperation)
  26 {
  27   if (!canStartOperation(theOperation))
  28     return false;
  29
  30   myOperations.append(theOperation);
  31
  32   connect(theOperation, SIGNAL(stopped()), this, SLOT(onOperationStopped()));
  33   connect(theOperation, SIGNAL(started()), this, SIGNAL(operationStarted()));
  34
  35   theOperation->start();
  36   return true;
  37 }
  38
  39 void XGUI_OperationMgr::resumeOperation(ModuleBase_Operation* theOperation)
  40 {
  41   connect(theOperation, SIGNAL(stopped()), this, SLOT(onOperationStopped()));
  42   connect(theOperation, SIGNAL(started()), this, SIGNAL(operationStarted()));
  43
  44   theOperation->resume();
  45 }
  46
  47 bool XGUI_OperationMgr::canStartOperation(ModuleBase_Operation* theOperation)
  48 {
  49   bool aCanStart = true;
  50   ModuleBase_Operation* aCurrentOp = currentOperation();
  51   if (aCurrentOp && !theOperation->isGranted())
  52   {
  53     int anAnswer = QMessageBox::question(0, tr("Operation launch"),
  54                                 tr("Previous operation is not finished and will be aborted"),
  55                                 QMessageBox::Ok, QMessageBox::Cancel);
  56     if (anAnswer == QMessageBox::Ok) {
  57       aCurrentOp->abort();
  58     } else {
  59       aCanStart = false;
  60     }
  61   }
  62   return aCanStart;
  63 }
  64
  65 void XGUI_OperationMgr::onOperationStopped()
  66 {
  67   ModuleBase_Operation* aSenderOperation = dynamic_cast<ModuleBase_Operation*>(sender());
  68   ModuleBase_Operation* anOperation = currentOperation();
  69   if (!aSenderOperation || !anOperation || aSenderOperation != anOperation )
  70     return;
  71
  72   emit operationStopped(anOperation);
  73
  74   myOperations.removeAll(anOperation);
  75   anOperation->deleteLater();
  76
  77   // get last operation which can be resumed
  78   ModuleBase_Operation* aResultOp = 0;
  79   QListIterator<ModuleBase_Operation*> anIt(myOperations);
  80   anIt.toBack();
  81   while(anIt.hasPrevious())
  82   {
  83     ModuleBase_Operation* anOp = anIt.previous();
  84     if (anOp) {
  85       aResultOp = anOp;
  86       break;
  87     }
  88   }
  89   if (aResultOp)
  90     resumeOperation(aResultOp);
  91 }