From 886291938d88c75999825d679283c1f04edcde24 Mon Sep 17 00:00:00 2001
From: asl <asl@opencascade.com>
Date: Fri, 22 Sep 2017 10:23:18 +0300
Subject: [PATCH] refs #1324: implementation of the "chained operations" for
 panning

---
 src/OCCViewer/OCCViewer_ViewManager.cxx | 13 ++++++++++++-
 src/OCCViewer/OCCViewer_ViewManager.h   |  6 ++++++
 src/OCCViewer/OCCViewer_ViewWindow.cxx  | 10 ++++++++--
 3 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/src/OCCViewer/OCCViewer_ViewManager.cxx b/src/OCCViewer/OCCViewer_ViewManager.cxx
index c1f2b4d50..4e3b9d6b8 100755
--- a/src/OCCViewer/OCCViewer_ViewManager.cxx
+++ b/src/OCCViewer/OCCViewer_ViewManager.cxx
@@ -28,7 +28,8 @@
   Constructor
 */
 OCCViewer_ViewManager::OCCViewer_ViewManager( SUIT_Study* study, SUIT_Desktop* theDesktop, bool DisplayTrihedron )
-: SUIT_ViewManager( study, theDesktop, new OCCViewer_Viewer( DisplayTrihedron ) )
+: SUIT_ViewManager( study, theDesktop, new OCCViewer_Viewer( DisplayTrihedron ) ),
+  myIsChainedOperations( false )
 {  
   setTitle( tr( "OCC_VIEW_TITLE" ) );
 }
@@ -50,3 +51,13 @@ void OCCViewer_ViewManager::contextMenuPopup( QMenu* popup )
   // if it is necessary invoke method CreatePopup of ViewPort
   // be sure that existing QPopupMenu menu is used for that.
 }
+
+bool OCCViewer_ViewManager::isChainedOperations() const
+{
+  return myIsChainedOperations;
+}
+
+void OCCViewer_ViewManager::setChainedOperations( bool isChainedOperations )
+{
+  myIsChainedOperations = isChainedOperations;
+}
diff --git a/src/OCCViewer/OCCViewer_ViewManager.h b/src/OCCViewer/OCCViewer_ViewManager.h
index c29474ebf..e4ac7c119 100755
--- a/src/OCCViewer/OCCViewer_ViewManager.h
+++ b/src/OCCViewer/OCCViewer_ViewManager.h
@@ -40,6 +40,12 @@ public:
   OCCViewer_Viewer* getOCCViewer() { return (OCCViewer_Viewer*) myViewModel; }
 
   virtual void      contextMenuPopup( QMenu* );
+
+  bool isChainedOperations() const;
+  void setChainedOperations( bool );
+
+private:
+  bool myIsChainedOperations;
 };
 
 #endif
diff --git a/src/OCCViewer/OCCViewer_ViewWindow.cxx b/src/OCCViewer/OCCViewer_ViewWindow.cxx
index a4bce4220..45a9f37c0 100644
--- a/src/OCCViewer/OCCViewer_ViewWindow.cxx
+++ b/src/OCCViewer/OCCViewer_ViewWindow.cxx
@@ -1069,8 +1069,14 @@ void OCCViewer_ViewWindow::vpMouseReleaseEvent(QMouseEvent* theEvent)
 #if OCC_VERSION_LARGE <= 0x07000000
     myViewPort->getView()->ZFitAll();
 #endif
-    resetState();
-    break;
+    {
+      OCCViewer_ViewManager* aMgr = dynamic_cast<OCCViewer_ViewManager*>( getViewManager() );
+      bool isChained = aMgr->isChainedOperations();
+      bool isReset = !( myOperation==PANVIEW && isChained ) || theEvent->button() == Qt::RightButton;
+      if( isReset )
+        resetState();
+      break;
+    }
 
   case PANGLOBAL:
     if ( theEvent->button() == Qt::LeftButton ) {
-- 
2.39.2