Turn query/retrieve widget into modal dialog in viewer

Libs/DICOM/Widgets/Resources/UI/ctkDICOMQueryRetrieveWidget.ui

@@ -91,6 +91,13 @@
        </widget>
       </item>
       <item>
+       <widget class="QPushButton" name="CancelButton">
+        <property name="text">
+         <string>Cancel</string>
+        </property>
+       </widget>
+      </item>
+      <item>
        <spacer name="horizontalSpacer_2">
         <property name="orientation">
          <enum>Qt::Horizontal</enum>

Libs/DICOM/Widgets/ctkDICOMAppWidget.cpp

@@ -69,6 +69,7 @@ ctkDICOMAppWidget::ctkDICOMAppWidget(QWidget* _parent):Superclass(_parent),
 
   //Initialize Q/R widget
   d->QueryRetrieveWidget = new ctkDICOMQueryRetrieveWidget();
+  d->QueryRetrieveWidget->setWindowModality ( Qt::ApplicationModal );
   connect(d->directoryButton, SIGNAL(directoryChanged(const QString&)), this, SLOT(setDatabaseDirectory(const QString&)));
 
   //Initialize import widget

Libs/DICOM/Widgets/ctkDICOMQueryRetrieveWidget.cpp

@@ -78,6 +78,7 @@ ctkDICOMQueryRetrieveWidget::ctkDICOMQueryRetrieveWidget(QWidget* parentWidget)
   d->ProgressDialog = 0;
   connect(d->QueryButton, SIGNAL(clicked()), this, SLOT(processQuery()));
   connect(d->RetrieveButton, SIGNAL(clicked()), this, SLOT(processRetrieve()));
+  connect(d->CancelButton, SIGNAL(clicked()),this,SLOT(hide()));
 
   d->results->setModel(&d->model);
   d->model.setHeaderData(0, Qt::Horizontal, Qt::Unchecked, Qt::CheckStateRole);