From 3030bd03de602f7b907e0bcc43e6aaf8c1c09fb4 Mon Sep 17 00:00:00 2001
From: san <san@opencascade.com>
Date: Tue, 20 Mar 2007 17:35:10 +0000
Subject: [PATCH] STL collections used to simplify possible Qt 4 porting
 show()/hide() interface and update logic added

---
 src/QxGraph/QxGraph_Prs.cxx       | 65 +++++++++++++++++++++++++++++--
 src/QxGraph/QxGraph_Prs.h         | 24 ++++++++----
 src/QxGraph/QxGraph_ViewModel.cxx | 12 ------
 src/QxGraph/QxGraph_ViewModel.h   |  2 -
 4 files changed, 79 insertions(+), 24 deletions(-)

diff --git a/src/QxGraph/QxGraph_Prs.cxx b/src/QxGraph/QxGraph_Prs.cxx
index 81ff0ebb7..ef453e4b0 100644
--- a/src/QxGraph/QxGraph_Prs.cxx
+++ b/src/QxGraph/QxGraph_Prs.cxx
@@ -32,7 +32,8 @@
 */
 QxGraph_Prs::QxGraph_Prs(QxGraph_Canvas* theCanvas):
   myCanvas(theCanvas),
-  myDMode(0)
+  myDMode(0),
+  needUpdate(true)
 {
   myCanvas->addPrs(this);
 }
@@ -51,9 +52,67 @@ QxGraph_Prs::~QxGraph_Prs()
 void QxGraph_Prs::addItem(QCanvasItem* theItem, int theDMode)
 {
   if ( theDMode == -1 ) // add item for the current display mode
-    myDisplayMap[myDMode].append(theItem);
+    myDisplayMap[myDMode].push_back(theItem);
   else
-    myDisplayMap[theDMode].append(theItem);
+    myDisplayMap[theDMode].push_back(theItem);
+}
+
+/*! Adds all the items of this presentation for the current display mode
+ *  to the canvas.
+ */
+void QxGraph_Prs::show()
+{
+  if ( isToUpdate() )
+    update();
+
+  for ( std::list<QCanvasItem*>::iterator it = myDisplayMap[myDMode].begin();
+	it != myDisplayMap[myDMode].end();
+	it++ )
+  {
+    QCanvasItem* anItem = *it;
+    if ( anItem )
+    {
+      anItem->setCanvas( myCanvas );
+      anItem->show();
+    }
+  }
+}
+
+/*! Removes all the items belonging to this presentation from the canvas.
+ */
+void QxGraph_Prs::hide()
+{
+  for ( DMode2ItemList::iterator it1 = myDisplayMap.begin();
+	it1 != myDisplayMap.end();
+	it1++ )
+  {
+    for ( std::list<QCanvasItem*>::iterator it2 = (*it1).second.begin();
+	  it2 != (*it1).second.end();
+	  it2++ )
+    {
+      QCanvasItem* anItem = *it2;
+      if ( anItem )
+      {
+	anItem->setCanvas( 0 );
+      }
+    }
+  }
+}
+
+/*! Prepare for full recomputation of the presentation
+ */
+void QxGraph_Prs::setToUpdate( const bool theFlag )
+{
+  needUpdate = theFlag;
+}
+
+/*! Re-fills the presentation with items.
+ *  Base implementation just resets <needUpdate> flag.
+ *  It should be called at the end by re-implementations.
+ */
+void QxGraph_Prs::update()
+{
+  setToUpdate( false );
 }
 
 /*!
diff --git a/src/QxGraph/QxGraph_Prs.h b/src/QxGraph/QxGraph_Prs.h
index 34bf24bcc..4b7a40fa9 100644
--- a/src/QxGraph/QxGraph_Prs.h
+++ b/src/QxGraph/QxGraph_Prs.h
@@ -19,11 +19,11 @@
 #ifndef QXGRAPH_PRS_H
 #define QXGRAPH_PRS_H
 
-#include "QxGraph.h"
+#include <QxGraph.h>
 
 #include <qcanvas.h>
-#include <qmap.h>
-#include <qptrlist.h>
+#include <map>
+#include <list>
 
 class QxGraph_Canvas;
 
@@ -33,6 +33,8 @@ class QXGRAPH_EXPORT QxGraph_Prs
   QxGraph_Prs(QxGraph_Canvas*);
   virtual ~QxGraph_Prs();
 
+  QxGraph_Canvas* getCanvas() const { return myCanvas; }
+
   void addItem(QCanvasItem* theItem, int theDMode = -1);
   
   /* add items for display mode theDMode
@@ -43,20 +45,28 @@ class QXGRAPH_EXPORT QxGraph_Prs
   QCanvasItem*   addEllipseItem(int theW, int theH, int theStartAngle, int theAngle, int theDMode = -1);
   QCanvasItem*   addTextItem(QString theText, int theDMode = -1);
 
-  typedef QMap< int, QPtrList<QCanvasItem> > DMode2ItemList;
+  typedef std::map< int, std::list<QCanvasItem*> > DMode2ItemList;
 
   const DMode2ItemList& getDisplayMap() const { return myDisplayMap; }
-  const QPtrList<QCanvasItem>& getItems(int theDMode) { return myDisplayMap[theDMode]; }
+  const std::list<QCanvasItem*>& getItems(int theDMode) { return myDisplayMap[theDMode]; }
   
   void setDMode(int theDMode) { myDMode = theDMode; }
   int  getDMode() const { return myDMode; }
 
- private:
+  virtual void    show();
+  virtual void    hide();
+  virtual void    setToUpdate( const bool );
+  bool            isToUpdate() { return needUpdate; }
+
+protected:
+  virtual void    update();
+
+private:
   QxGraph_Canvas* myCanvas;
   DMode2ItemList  myDisplayMap;
 
   int             myDMode;
-
+  bool            needUpdate;
 };
 
 #endif
diff --git a/src/QxGraph/QxGraph_ViewModel.cxx b/src/QxGraph/QxGraph_ViewModel.cxx
index 8a85cf55d..166ceac33 100644
--- a/src/QxGraph/QxGraph_ViewModel.cxx
+++ b/src/QxGraph/QxGraph_ViewModel.cxx
@@ -65,10 +65,6 @@ void QxGraph_Viewer::initView( QxGraph_ViewWindow* view )
   {
     view->initLayout();
     
-    // for debug only (CreatePrs() must be called from YACSGui_Displayer) --->
-    QxGraph_Prs* aPrs = CreatePrs();
-    //aPrs->setDMode(YACSGui_Displayer::Full); from enumeration in Displayer
-
     /*
     // test add items into the current canvas view
     QRect aRect(100,200,200,100);
@@ -159,11 +155,3 @@ void QxGraph_Viewer::onShowToolbar() {
   if ( aView )
     aView->getToolBar()->show();    
 }
-
-/*!
-  Create QxGraph_Prs object for the myCanvas
-*/
-QxGraph_Prs* QxGraph_Viewer::CreatePrs()
-{
-  return new QxGraph_Prs(myCanvas);
-}
diff --git a/src/QxGraph/QxGraph_ViewModel.h b/src/QxGraph/QxGraph_ViewModel.h
index fab15d582..e04fcb35e 100644
--- a/src/QxGraph/QxGraph_ViewModel.h
+++ b/src/QxGraph/QxGraph_ViewModel.h
@@ -63,8 +63,6 @@ class QXGRAPH_EXPORT QxGraph_Viewer: public SUIT_ViewModel
   void                setCurrentView(QxGraph_CanvasView* theView) { myCurrentView = theView; }
   void                setCurrentView(int theIndex);
 
-  QxGraph_Prs*        CreatePrs();
-
  protected:
   void initView(QxGraph_ViewWindow* view);
 
-- 
2.39.2