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 bool XGUI_OperationMgr::canStartOperation(ModuleBase_Operation* theOperation)
  40 {
  41   bool aCanStart = true;
  42   ModuleBase_Operation* aCurrentOp = currentOperation();
  43   if (aCurrentOp && !theOperation->isGranted())
  44   {
  45     int anAnswer = QMessageBox::question(0, tr("Operation launch"),
  46                                 tr("Previous operation is not finished and will be aborted"),
  47                                 QMessageBox::Ok, QMessageBox::Cancel);
  48     if (anAnswer == QMessageBox::Ok) {
  49       aCurrentOp->abort();
  50     } else {
  51       aCanStart = false;
  52     }
  53   }
  54   return aCanStart;
  55 }
  56
  57 void XGUI_OperationMgr::onOperationStopped()
  58 {
  59   ModuleBase_Operation* aSenderOperation = dynamic_cast<ModuleBase_Operation*>(sender());
  60   ModuleBase_Operation* anOperation = currentOperation();
  61   if (!aSenderOperation || !anOperation || aSenderOperation != anOperation )
  62     return;
  63
  64   emit operationStopped(anOperation);
  65
  66   myOperations.removeAll(anOperation);
  67   anOperation->deleteLater();
  68
  69   // get last operation which can be resumed
  70   ModuleBase_Operation* aResultOp = 0;
  71   QListIterator<ModuleBase_Operation*> anIt(myOperations);
  72   anIt.toBack();
  73   while(anIt.hasPrevious())
  74   {
  75     ModuleBase_Operation* anOp = anIt.previous();
  76     if (anOp) {
  77       aResultOp = anOp;
  78       break;
  79     }
  80   }
  81   if (aResultOp)
  82     startOperation(aResultOp);
  83 }