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 bool XGUI_OperationMgr::abortOperation()
  50 {
  51   ModuleBase_Operation* aCurrentOp = currentOperation();
  52   if (!aCurrentOp || !canStopOperation())
  53     return false;
  54
  55   aCurrentOp->abort();
  56   return true;
  57 }
  58
  59 void XGUI_OperationMgr::resumeOperation(ModuleBase_Operation* theOperation)
  60 {
  61   connect(theOperation, SIGNAL(stopped()), this, SLOT(onOperationStopped()));
  62   connect(theOperation, SIGNAL(started()), this, SIGNAL(operationStarted()));
  63
  64   theOperation->resume();
  65 }
  66
  67 bool XGUI_OperationMgr::canStartOperation(ModuleBase_Operation* theOperation)
  68 {
  69   bool aCanStart = true;
  70   ModuleBase_Operation* aCurrentOp = currentOperation();
  71   if (aCurrentOp && !theOperation->isGranted())
  72   {
  73     if (canStopOperation()) {
  74       aCurrentOp->abort();
  75     } else {
  76       aCanStart = false;
  77     }
  78   }
  79   return aCanStart;
  80 }
  81
  82 bool XGUI_OperationMgr::canStopOperation()
  83 {
  84   int anAnswer = QMessageBox::question(0, tr("Operation launch"),
  85                               tr("Previous operation is not finished and will be aborted"),
  86                               QMessageBox::Ok, QMessageBox::Cancel);
  87   return anAnswer == QMessageBox::Ok;
  88 }
  89
  90 void XGUI_OperationMgr::onOperationStopped()
  91 {
  92   ModuleBase_Operation* aSenderOperation = dynamic_cast<ModuleBase_Operation*>(sender());
  93   ModuleBase_Operation* anOperation = currentOperation();
  94   if (!aSenderOperation || !anOperation || aSenderOperation != anOperation )
  95     return;
  96
  97   emit operationStopped(anOperation);
  98
  99   myOperations.removeAll(anOperation);
 100   anOperation->deleteLater();
 101
 102   // get last operation which can be resumed
 103   ModuleBase_Operation* aResultOp = 0;
 104   QListIterator<ModuleBase_Operation*> anIt(myOperations);
 105   anIt.toBack();
 106   while(anIt.hasPrevious())
 107   {
 108     ModuleBase_Operation* anOp = anIt.previous();
 109     if (anOp) {
 110       aResultOp = anOp;
 111       break;
 112     }
 113   }
 114   if (aResultOp)
 115     resumeOperation(aResultOp);
 116 }