From 0a4a2b003184a2a14ba4d8d4c4ca692b339b4f02 Mon Sep 17 00:00:00 2001
From: CHEMIN Sebastien <sc236498@is245491.intra.cea.fr>
Date: Mon, 18 Mar 2024 14:25:33 +0100
Subject: [PATCH] Add global pan

---
 src/GraphicsView/GraphicsView_ViewFrame.cxx |  3 +--
 src/GraphicsView/GraphicsView_ViewPort.cxx  | 27 +++++++++++++++++++--
 src/GraphicsView/GraphicsView_ViewPort.h    |  2 ++
 src/GraphicsView/GraphicsView_Viewer.cxx    |  9 +++++++
 src/GraphicsView/GraphicsView_Viewer.h      |  1 +
 5 files changed, 38 insertions(+), 4 deletions(-)

diff --git a/src/GraphicsView/GraphicsView_ViewFrame.cxx b/src/GraphicsView/GraphicsView_ViewFrame.cxx
index c97c62ec1..9c40eaad3 100644
--- a/src/GraphicsView/GraphicsView_ViewFrame.cxx
+++ b/src/GraphicsView/GraphicsView_ViewFrame.cxx
@@ -341,7 +341,7 @@ void GraphicsView_ViewFrame::onViewFitSelect()
 //================================================================
 void GraphicsView_ViewFrame::onViewGlobalPan()
 {
-//  myViewer->activateTransform( GraphicsView_Viewer::PanGlobal );
+  myViewer->globalPan();
 }
 
 //================================================================
@@ -350,7 +350,6 @@ void GraphicsView_ViewFrame::onViewGlobalPan()
 //================================================================
 void GraphicsView_ViewFrame::onViewReset()
 {
-//  myViewer->activateTransform( GraphicsView_Viewer::Reset );
 }
 
 //================================================================
diff --git a/src/GraphicsView/GraphicsView_ViewPort.cxx b/src/GraphicsView/GraphicsView_ViewPort.cxx
index 44f7966ab..41c6535f8 100644
--- a/src/GraphicsView/GraphicsView_ViewPort.cxx
+++ b/src/GraphicsView/GraphicsView_ViewPort.cxx
@@ -58,6 +58,7 @@ GraphicsView_ViewPort::GraphicsView_ViewPort( QWidget* theParent )
   previousPos = QPoint();
 
   panning = false;
+  globalPanning = false;
   
   SUIT_ResourceMgr* rmgr = SUIT_Session::session()->resourceMgr();
   zoomCursor = new QCursor( rmgr->loadPixmap( "GraphicsView", tr( "ICON_GV_CURSOR_ZOOM" ) ) );
@@ -162,11 +163,20 @@ void GraphicsView_ViewPort::updateSceneRect(const QRectF &rect)
 
 void GraphicsView_ViewPort::mousePressEvent(QMouseEvent *event)
 { 
- if (!zooming && !panning && items(event->pos()).count()==0 && (event->buttons() & Qt::LeftButton))
+  if (!zooming && !panning && !globalPanning && items(event->pos()).count()==0 && (event->buttons() & Qt::LeftButton))
     {
       startDrawingRect(event->pos().x(), event->pos().y());
     }
- 
+
+  if (globalPanning)
+    {
+      QPoint p0 = viewport()->rect().center();
+      QPoint p1 = event->pos();
+      double deltaX = p0.x() - p1.x();
+      double deltaY = p0.y() - p1.y();
+
+      pan(deltaX, -deltaY);
+    }
   QGraphicsView::mousePressEvent(event);
   emit vpMouseEvent(event);
 }
@@ -267,6 +277,7 @@ void GraphicsView_ViewPort::clearActions()
   fittingArea = false;
   zooming = false;
   panning  = false;
+  globalPanning = false;
   previousPos = QPoint();
 }
   
@@ -275,6 +286,7 @@ void GraphicsView_ViewPort::activateZoomAction()
   zooming = true;
   fittingArea = false;
   panning  = false;
+  globalPanning = false;
   setCursor(*zoomCursor); 
 }
 
@@ -283,6 +295,7 @@ void GraphicsView_ViewPort::activateFitAreaAction()
   fittingArea = true;
   zooming = false;
   panning  = false;
+  globalPanning = false;
   setCursor(Qt::PointingHandCursor);
 }
 
@@ -291,9 +304,19 @@ void GraphicsView_ViewPort::activatePanAction()
   panning = true; 
   fittingArea = false;
   zooming = false;
+  globalPanning = false;
   setCursor(Qt::SizeAllCursor);
 }
 
+void GraphicsView_ViewPort::activateGlobalPanAction() 
+{
+  globalPanning = true;
+  panning = false; 
+  fittingArea = false;
+  zooming = false;
+  setCursor(Qt::CrossCursor);
+}
+
 void GraphicsView_ViewPort::pan( double theDX, double theDY )
 {
   if( QScrollBar* aHBar = horizontalScrollBar() )
diff --git a/src/GraphicsView/GraphicsView_ViewPort.h b/src/GraphicsView/GraphicsView_ViewPort.h
index 46db685b4..5387c5269 100644
--- a/src/GraphicsView/GraphicsView_ViewPort.h
+++ b/src/GraphicsView/GraphicsView_ViewPort.h
@@ -52,6 +52,7 @@ public:
   void activateZoomAction();
   void activateFitAreaAction(); 
   void activatePanAction(); 
+  void activateGlobalPanAction();
   void pan( double theDX, double theDY );
 
 
@@ -87,6 +88,7 @@ private:
   bool fittingArea;
   bool zooming;
   bool panning;
+  bool globalPanning;
   QPoint previousPos;
   QCursor* zoomCursor;
 };
diff --git a/src/GraphicsView/GraphicsView_Viewer.cxx b/src/GraphicsView/GraphicsView_Viewer.cxx
index ca910ea81..87a3d2251 100644
--- a/src/GraphicsView/GraphicsView_Viewer.cxx
+++ b/src/GraphicsView/GraphicsView_Viewer.cxx
@@ -301,3 +301,12 @@ void GraphicsView_Viewer::pan()
   if (GraphicsView_ViewPort* aViewPort = getActiveViewPort())
     aViewPort->activatePanAction();
 }
+
+void GraphicsView_Viewer::globalPan()
+{
+  if (GraphicsView_ViewPort* aViewPort = getActiveViewPort())
+    {
+      aViewPort->fitAll();
+      aViewPort->activateGlobalPanAction();
+    }
+}
diff --git a/src/GraphicsView/GraphicsView_Viewer.h b/src/GraphicsView/GraphicsView_Viewer.h
index ba2dfa997..a0fe51abd 100644
--- a/src/GraphicsView/GraphicsView_Viewer.h
+++ b/src/GraphicsView/GraphicsView_Viewer.h
@@ -66,6 +66,7 @@ public:
   void fitArea();
   void zoom();
   void pan();
+  void globalPan();
 
 signals:
   void selectionChanged();
-- 
2.39.2