From: CHEMIN Sebastien <sc236498@is245491.intra.cea.fr>
Date: Fri, 8 Mar 2024 07:34:34 +0000 (+0100)
Subject: Panning action (in progress)
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=20831530c2d3d6f1ab50002dc8a220597a7d731f;p=modules%2Fgui.git

Panning action (in progress)
---

diff --git a/src/GraphicsView/GraphicsView_ViewFrame.cxx b/src/GraphicsView/GraphicsView_ViewFrame.cxx
index 974a8a6bc..44cd01ac4 100644
--- a/src/GraphicsView/GraphicsView_ViewFrame.cxx
+++ b/src/GraphicsView/GraphicsView_ViewFrame.cxx
@@ -308,6 +308,7 @@ void GraphicsView_ViewFrame::expandToolBarActions()
 //================================================================
 void GraphicsView_ViewFrame::onViewPan()
 {
+  myViewer->pan();
 //  myViewer->activateTransform( GraphicsView_Viewer::Pan );
 }
 
diff --git a/src/GraphicsView/GraphicsView_ViewPort.cxx b/src/GraphicsView/GraphicsView_ViewPort.cxx
index af16efdaa..db8ad6a86 100644
--- a/src/GraphicsView/GraphicsView_ViewPort.cxx
+++ b/src/GraphicsView/GraphicsView_ViewPort.cxx
@@ -23,10 +23,11 @@
 #include <QRubberBand>
 #include <QMouseEvent>
 #include <QCursor>
+#include <QScrollBar>
 
 #include "SUIT_ResourceMgr.h"
 #include "SUIT_Session.h"
-
+#include <iostream>
 //=======================================================================
 // Name    : GraphicsView_ViewPort
 // Purpose : Constructor
@@ -38,6 +39,7 @@ GraphicsView_ViewPort::GraphicsView_ViewPort( QWidget* theParent )
 
   setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
   setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+
   setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
   
   setMouseTracking( true );
@@ -52,6 +54,8 @@ GraphicsView_ViewPort::GraphicsView_ViewPort( QWidget* theParent )
 
   zooming = false;
   previousPos = QPoint();
+
+  panning = false;
   
   SUIT_ResourceMgr* rmgr = SUIT_Session::session()->resourceMgr();
   zoomCursor = new QCursor( rmgr->loadPixmap( "GraphicsView", tr( "ICON_GV_CURSOR_ZOOM" ) ) );
@@ -160,7 +164,7 @@ void GraphicsView_ViewPort::finishDrawingRect()
 
 void GraphicsView_ViewPort::mousePressEvent(QMouseEvent *event)
 { 
- if (!zooming && items(event->pos()).count()==0)
+ if (!zooming && !panning && items(event->pos()).count()==0)
     {
       startDrawingRect(event->pos().x(), event->pos().y());
     }
@@ -175,6 +179,22 @@ void GraphicsView_ViewPort::mouseMoveEvent(QMouseEvent *event)
   if ((event->modifiers() & Qt::ShiftModifier) && (event->buttons() & Qt::LeftButton))
     activateZoomAction();
 
+  if (panning && (event->buttons() & Qt::LeftButton))
+    {
+    QPoint currentPos = event->pos();
+
+    if (!previousPos.isNull())
+    {
+      double deltaX = currentPos.x() - previousPos.x();
+      double deltaY = currentPos.y() - previousPos.y();
+
+      pan(deltaX, deltaY);
+
+    }
+    previousPos = currentPos;  
+
+    }
+
   if (zooming && (event->buttons() & Qt::LeftButton))
   {
     QPoint currentPos = event->pos();
@@ -228,12 +248,16 @@ void GraphicsView_ViewPort::clearActions()
   setCursor(Qt::ArrowCursor);
   fittingArea = false;
   zooming = false;
+  panning  = false;
+  previousPos = QPoint();
+  setDragMode(QGraphicsView::RubberBandDrag); 
 }
   
 void GraphicsView_ViewPort::activateZoomAction() 
 { 
   zooming = true;
   fittingArea = false;
+  panning  = false;
   setCursor(*zoomCursor); 
 }
 
@@ -241,5 +265,36 @@ void GraphicsView_ViewPort::activateFitAreaAction()
 { 
   fittingArea = true;
   zooming = false;
+  panning  = false;
   setCursor(Qt::PointingHandCursor);
 }
+
+void GraphicsView_ViewPort::activatePanAction() 
+{
+  panning = true; 
+  fittingArea = false;
+  zooming = false;
+  setCursor(Qt::SizeAllCursor);
+}
+
+void GraphicsView_ViewPort::pan( double theDX, double theDY )
+{
+  std::cout << "pan : " << theDX << " " << theDY << std::endl;
+
+  if( QScrollBar* aHBar = horizontalScrollBar() )
+  {
+      int aNewValue = aHBar->value() - theDX;
+      if( aNewValue < aHBar->minimum() )
+        aHBar->setMinimum( aNewValue );
+      if( aNewValue > aHBar->maximum() )
+        aHBar->setMaximum( aNewValue );
+  }
+  if( QScrollBar* aVBar = verticalScrollBar() )
+  {
+      int aNewValue = aVBar->value() - theDY;
+      if( aNewValue < aVBar->minimum() )
+        aVBar->setMinimum( aNewValue );
+      if( aNewValue > aVBar->maximum() )
+        aVBar->setMaximum( aNewValue );
+  }
+}
diff --git a/src/GraphicsView/GraphicsView_ViewPort.h b/src/GraphicsView/GraphicsView_ViewPort.h
index f5bf5a233..ea04e08a5 100644
--- a/src/GraphicsView/GraphicsView_ViewPort.h
+++ b/src/GraphicsView/GraphicsView_ViewPort.h
@@ -56,6 +56,8 @@ public:
 
   void activateZoomAction();
   void activateFitAreaAction(); 
+  void activatePanAction(); 
+  void pan( double theDX, double theDY );
 
 signals:
   void vpMouseEvent(QMouseEvent*);
@@ -84,6 +86,7 @@ private:
 
   bool fittingArea;
   bool zooming;
+  bool panning;
   QPoint previousPos;
   QCursor* zoomCursor;
 };
diff --git a/src/GraphicsView/GraphicsView_Viewer.cxx b/src/GraphicsView/GraphicsView_Viewer.cxx
index bfb50f147..9c593f619 100644
--- a/src/GraphicsView/GraphicsView_Viewer.cxx
+++ b/src/GraphicsView/GraphicsView_Viewer.cxx
@@ -379,3 +379,9 @@ void GraphicsView_Viewer::zoom()
   if (GraphicsView_ViewPort* aViewPort = getActiveViewPort())
     aViewPort->activateZoomAction();
 }
+
+void GraphicsView_Viewer::pan()
+{
+  if (GraphicsView_ViewPort* aViewPort = getActiveViewPort())
+    aViewPort->activatePanAction();
+}
diff --git a/src/GraphicsView/GraphicsView_Viewer.h b/src/GraphicsView/GraphicsView_Viewer.h
index b5b53c29c..5ac77cabb 100644
--- a/src/GraphicsView/GraphicsView_Viewer.h
+++ b/src/GraphicsView/GraphicsView_Viewer.h
@@ -77,6 +77,7 @@ public:
   void fitSelect();
   void fitArea();
   void zoom();
+  void pan();
 
   bool                          isInitialized() const { return myIsInitialized; }
   void                          setIsInitialized( bool );