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 bool XGUI_OperationMgr::startOperation(ModuleBase_Operation* theOperation)
  31 {
  32   if (!canStartOperation(theOperation))
  33     return false;
  34
  35   myOperations.append(theOperation);
  36
  37   connect(theOperation, SIGNAL(stopped()), this, SLOT(onOperationStopped()));
  38   connect(theOperation, SIGNAL(started()), this, SIGNAL(operationStarted()));
  39
  40   theOperation->start();
  41   return true;
  42 }
  43
  44 void XGUI_OperationMgr::resumeOperation(ModuleBase_Operation* theOperation)
  45 {
  46   connect(theOperation, SIGNAL(stopped()), this, SLOT(onOperationStopped()));
  47   connect(theOperation, SIGNAL(started()), this, SIGNAL(operationStarted()));
  48
  49   theOperation->resume();
  50 }
  51
  52 bool XGUI_OperationMgr::canStartOperation(ModuleBase_Operation* theOperation)
  53 {
  54   bool aCanStart = true;
  55   ModuleBase_Operation* aCurrentOp = currentOperation();
  56   if (aCurrentOp && !theOperation->isGranted())
  57   {
  58     int anAnswer = QMessageBox::question(0, tr("Operation launch"),
  59                                 tr("Previous operation is not finished and will be aborted"),
  60                                 QMessageBox::Ok, QMessageBox::Cancel);
  61     if (anAnswer == QMessageBox::Ok) {
  62       aCurrentOp->abort();
  63     } else {
  64       aCanStart = false;
  65     }
  66   }
  67   return aCanStart;
  68 }
  69
  70 void XGUI_OperationMgr::onOperationStopped()
  71 {
  72   ModuleBase_Operation* aSenderOperation = dynamic_cast<ModuleBase_Operation*>(sender());
  73   ModuleBase_Operation* anOperation = currentOperation();
  74   if (!aSenderOperation || !anOperation || aSenderOperation != anOperation )
  75     return;
  76
  77   emit operationStopped(anOperation);
  78
  79   myOperations.removeAll(anOperation);
  80   anOperation->deleteLater();
  81
  82   // get last operation which can be resumed
  83   ModuleBase_Operation* aResultOp = 0;
  84   QListIterator<ModuleBase_Operation*> anIt(myOperations);
  85   anIt.toBack();
  86   while(anIt.hasPrevious())
  87   {
  88     ModuleBase_Operation* anOp = anIt.previous();
  89     if (anOp) {
  90       aResultOp = anOp;
  91       break;
  92     }
  93   }
  94   if (aResultOp)
  95     resumeOperation(aResultOp);
  96 }