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   connect(theOperation, SIGNAL(resumed()), this, SIGNAL(operationResumed()));
  45
  46   theOperation->start();
  47   return true;
  48 }
  49
  50 bool XGUI_OperationMgr::abortOperation()
  51 {
  52   ModuleBase_Operation* aCurrentOp = currentOperation();
  53   if (!aCurrentOp || !canStopOperation())
  54     return false;
  55
  56   aCurrentOp->abort();
  57   return true;
  58 }
  59
  60 void XGUI_OperationMgr::resumeOperation(ModuleBase_Operation* theOperation)
  61 {
  62   theOperation->resume();
  63 }
  64
  65 bool XGUI_OperationMgr::canStartOperation(ModuleBase_Operation* theOperation)
  66 {
  67   bool aCanStart = true;
  68   ModuleBase_Operation* aCurrentOp = currentOperation();
  69   if (aCurrentOp && !theOperation->isGranted(aCurrentOp))
  70   {
  71     if (canStopOperation()) {
  72       aCurrentOp->abort();
  73     } else {
  74       aCanStart = false;
  75     }
  76   }
  77   return aCanStart;
  78 }
  79
  80 bool XGUI_OperationMgr::canStopOperation()
  81 {
  82   int anAnswer = QMessageBox::question(0, tr("Operation launch"),
  83                               tr("Previous operation is not finished and will be aborted"),
  84                               QMessageBox::Ok, QMessageBox::Cancel);
  85   return anAnswer == QMessageBox::Ok;
  86 }
  87
  88 void XGUI_OperationMgr::onCommitOperation()
  89 {
  90   ModuleBase_Operation* anOperation = currentOperation();
  91   if (anOperation)
  92     anOperation->commit();
  93 }
  94
  95 void XGUI_OperationMgr::onAbortOperation()
  96 {
  97   ModuleBase_Operation* anOperation = currentOperation();
  98   if (anOperation)
  99     anOperation->abort();
 100 }
 101
 102 void XGUI_OperationMgr::onOperationStopped()
 103 {
 104   ModuleBase_Operation* aSenderOperation = dynamic_cast<ModuleBase_Operation*>(sender());
 105   ModuleBase_Operation* anOperation = currentOperation();
 106   if (!aSenderOperation || !anOperation || aSenderOperation != anOperation )
 107     return;
 108
 109   emit operationStopped(anOperation);
 110
 111   myOperations.removeAll(anOperation);
 112   anOperation->deleteLater();
 113
 114   // get last operation which can be resumed
 115   ModuleBase_Operation* aResultOp = 0;
 116   QListIterator<ModuleBase_Operation*> anIt(myOperations);
 117   anIt.toBack();
 118   while(anIt.hasPrevious())
 119   {
 120     ModuleBase_Operation* anOp = anIt.previous();
 121     if (anOp) {
 122       aResultOp = anOp;
 123       break;
 124     }
 125   }
 126   if (aResultOp)
 127     resumeOperation(aResultOp);
 128 }