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 #include <QApplication>
  11 #include <QKeyEvent>
  12
  13 XGUI_OperationMgr::XGUI_OperationMgr(QObject* theParent)
  14 : QObject(theParent)
  15 {
  16   // listen to Escape signal to stop the current operation
  17   qApp->installEventFilter(this);
  18 }
  19
  20 XGUI_OperationMgr::~XGUI_OperationMgr()
  21 {
  22 }
  23
  24 ModuleBase_Operation* XGUI_OperationMgr::currentOperation() const
  25 {
  26   return myOperations.count() > 0 ? myOperations.last() : 0;
  27 }
  28
  29 bool XGUI_OperationMgr::hasOperation() const
  30 {
  31   return (myOperations.count() > 0) && (myOperations.last() != NULL);
  32 }
  33
  34 int XGUI_OperationMgr::operationsCount() const
  35 {
  36   return myOperations.count();
  37 }
  38
  39 bool XGUI_OperationMgr::startOperation(ModuleBase_Operation* theOperation)
  40 {
  41   if (!canStartOperation(theOperation))
  42     return false;
  43
  44   myOperations.append(theOperation);
  45
  46   connect(theOperation, SIGNAL(stopped()), this, SLOT(onOperationStopped()));
  47   connect(theOperation, SIGNAL(started()), this, SIGNAL(operationStarted()));
  48   connect(theOperation, SIGNAL(resumed()), this, SIGNAL(operationResumed()));
  49
  50   theOperation->start();
  51   return true;
  52 }
  53
  54 bool XGUI_OperationMgr::abortOperation()
  55 {
  56   ModuleBase_Operation* aCurrentOp = currentOperation();
  57   if (!aCurrentOp || !canStopOperation())
  58     return false;
  59
  60   aCurrentOp->abort();
  61   return true;
  62 }
  63
  64 QStringList XGUI_OperationMgr::operationList()
  65 {
  66   QStringList result;
  67   foreach(ModuleBase_Operation* eachOperation, myOperations) {
  68     result << eachOperation->id();
  69   }
  70   return result;
  71 }
  72
  73 bool XGUI_OperationMgr::eventFilter(QObject *theObject, QEvent *theEvent)
  74 {
  75   if (theEvent->type() == QEvent::KeyRelease) {
  76     QKeyEvent* aKeyEvent = (QKeyEvent*)theEvent;
  77     if (aKeyEvent && aKeyEvent->key() == Qt::Key_Escape) {
  78       // TODO: this is Escape button processing when the property panel has empty content,
  79       // but the operation should be stopped by the Enter has been clicked
  80       onKeyReleased("", aKeyEvent);
  81       return true;
  82     }
  83   }
  84   return QObject::eventFilter(theObject, theEvent);
  85 }
  86
  87 void XGUI_OperationMgr::resumeOperation(ModuleBase_Operation* theOperation)
  88 {
  89   theOperation->resume();
  90 }
  91
  92 bool XGUI_OperationMgr::canStartOperation(ModuleBase_Operation* theOperation)
  93 {
  94   bool aCanStart = true;
  95   ModuleBase_Operation* aCurrentOp = currentOperation();
  96   if (aCurrentOp && !theOperation->isGranted(aCurrentOp))
  97   {
  98     if (canStopOperation()) {
  99       aCurrentOp->abort();
 100     } else {
 101       aCanStart = false;
 102     }
 103   }
 104   return aCanStart;
 105 }
 106
 107 bool XGUI_OperationMgr::canStopOperation()
 108 {
 109   int anAnswer = QMessageBox::question(0, tr("Operation launch"),
 110                               tr("Previous operation is not finished and will be aborted"),
 111                               QMessageBox::Ok, QMessageBox::Cancel);
 112   return anAnswer == QMessageBox::Ok;
 113 }
 114
 115 void XGUI_OperationMgr::onCommitOperation()
 116 {
 117   ModuleBase_Operation* anOperation = currentOperation();
 118   if (anOperation)
 119     anOperation->commit();
 120 }
 121
 122 void XGUI_OperationMgr::onAbortOperation()
 123 {
 124   ModuleBase_Operation* anOperation = currentOperation();
 125   if (anOperation)
 126     anOperation->abort();
 127 }
 128
 129 void XGUI_OperationMgr::onOperationStopped()
 130 {
 131   ModuleBase_Operation* aSenderOperation = dynamic_cast<ModuleBase_Operation*>(sender());
 132   ModuleBase_Operation* anOperation = currentOperation();
 133   if (!aSenderOperation || !anOperation || aSenderOperation != anOperation )
 134     return;
 135
 136   myOperations.removeAll(anOperation);
 137   anOperation->deleteLater();
 138
 139   emit operationStopped(anOperation);
 140
 141   // get last operation which can be resumed
 142   ModuleBase_Operation* aResultOp = 0;
 143   QListIterator<ModuleBase_Operation*> anIt(myOperations);
 144   anIt.toBack();
 145   while(anIt.hasPrevious())
 146   {
 147     ModuleBase_Operation* anOp = anIt.previous();
 148     if (anOp) {
 149       aResultOp = anOp;
 150       break;
 151     }
 152   }
 153   if (aResultOp)
 154     resumeOperation(aResultOp);
 155 }
 156
 157 void XGUI_OperationMgr::onKeyReleased(const std::string& theName, QKeyEvent* theEvent)
 158 {
 159   ModuleBase_Operation* anOperation = currentOperation();
 160   if (anOperation)
 161     anOperation->keyReleased(theName, theEvent);
 162 }