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   connect(theOperation, SIGNAL(activateNextWidget(ModuleBase_ModelWidget*)),
  50           this, SIGNAL(activateNextWidget(ModuleBase_ModelWidget*)));
  51
  52   theOperation->start();
  53   return true;
  54 }
  55
  56 bool XGUI_OperationMgr::abortOperation()
  57 {
  58   ModuleBase_Operation* aCurrentOp = currentOperation();
  59   if (!aCurrentOp || !canStopOperation())
  60     return false;
  61
  62   aCurrentOp->abort();
  63   return true;
  64 }
  65
  66 QStringList XGUI_OperationMgr::operationList()
  67 {
  68   QStringList result;
  69   foreach(ModuleBase_Operation* eachOperation, myOperations) {
  70     result << eachOperation->id();
  71   }
  72   return result;
  73 }
  74
  75 bool XGUI_OperationMgr::eventFilter(QObject *theObject, QEvent *theEvent)
  76 {
  77   if (theEvent->type() == QEvent::KeyRelease) {
  78     QKeyEvent* aKeyEvent = (QKeyEvent*)theEvent;
  79     if (aKeyEvent && aKeyEvent->key() == Qt::Key_Escape) {
  80       // TODO: this is Escape button processing when the property panel has empty content,
  81       // but the operation should be stopped by the Enter has been clicked
  82       onKeyReleased("", aKeyEvent);
  83       return true;
  84     }
  85   }
  86   return QObject::eventFilter(theObject, theEvent);
  87 }
  88
  89 void XGUI_OperationMgr::resumeOperation(ModuleBase_Operation* theOperation)
  90 {
  91   theOperation->resume();
  92 }
  93
  94 bool XGUI_OperationMgr::canStartOperation(ModuleBase_Operation* theOperation)
  95 {
  96   bool aCanStart = true;
  97   ModuleBase_Operation* aCurrentOp = currentOperation();
  98   if (aCurrentOp && !theOperation->isGranted(aCurrentOp))
  99   {
 100     if (canStopOperation()) {
 101       aCurrentOp->abort();
 102     } else {
 103       aCanStart = false;
 104     }
 105   }
 106   return aCanStart;
 107 }
 108
 109 bool XGUI_OperationMgr::canStopOperation()
 110 {
 111   ModuleBase_Operation* anOperation = currentOperation();
 112   if (anOperation) {
 113     if (anOperation->isModified()) {
 114       int anAnswer = QMessageBox::question(qApp->activeWindow(), tr("Operation launch"),
 115                                   tr("Previous operation is not finished and will be aborted"),
 116                                   QMessageBox::Ok, QMessageBox::Cancel);
 117       return anAnswer == QMessageBox::Ok;
 118     }
 119   }
 120   return true;
 121 }
 122
 123 void XGUI_OperationMgr::onCommitOperation()
 124 {
 125   ModuleBase_Operation* anOperation = currentOperation();
 126   if (anOperation)
 127     anOperation->commit();
 128 }
 129
 130 void XGUI_OperationMgr::onAbortOperation()
 131 {
 132   ModuleBase_Operation* anOperation = currentOperation();
 133   if (anOperation && canAbortOperation())
 134     anOperation->abort();
 135 }
 136
 137 bool XGUI_OperationMgr::canAbortOperation()
 138 {
 139   ModuleBase_Operation* anOperation = currentOperation();
 140   if (anOperation && anOperation->isModified()) {
 141       int anAnswer = QMessageBox::question(qApp->activeWindow(), tr("Cancel operation"),
 142                                   tr("Operation %1 will be cancelled. Continue?").arg(anOperation->id()),
 143                                   QMessageBox::Yes, QMessageBox::No);
 144       return anAnswer == QMessageBox::Yes;
 145   }
 146   return true;
 147 }
 148
 149 void XGUI_OperationMgr::onOperationStopped()
 150 {
 151   ModuleBase_Operation* aSenderOperation = dynamic_cast<ModuleBase_Operation*>(sender());
 152   ModuleBase_Operation* anOperation = currentOperation();
 153   if (!aSenderOperation || !anOperation || aSenderOperation != anOperation )
 154     return;
 155
 156   myOperations.removeAll(anOperation);
 157   anOperation->deleteLater();
 158
 159   emit operationStopped(anOperation);
 160
 161   // get last operation which can be resumed
 162   ModuleBase_Operation* aResultOp = 0;
 163   QListIterator<ModuleBase_Operation*> anIt(myOperations);
 164   anIt.toBack();
 165   while(anIt.hasPrevious())
 166   {
 167     ModuleBase_Operation* anOp = anIt.previous();
 168     if (anOp) {
 169       aResultOp = anOp;
 170       break;
 171     }
 172   }
 173   if (aResultOp)
 174     resumeOperation(aResultOp);
 175 }
 176
 177 void XGUI_OperationMgr::onKeyReleased(const std::string& theName, QKeyEvent* theEvent)
 178 {
 179   ModuleBase_Operation* anOperation = currentOperation();
 180   if (anOperation)
 181     anOperation->keyReleased(theName, theEvent);
 182 }
 183
 184 void XGUI_OperationMgr::onWidgetActivated(ModuleBase_ModelWidget* theWidget)
 185 {
 186   ModuleBase_Operation* anOperation = currentOperation();
 187   if (anOperation)
 188     anOperation->onWidgetActivated(theWidget);
 189 }