src/XGUI/XGUI_OperationMgr.cpp

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