From 476c241f3a87fb4d824e540aa26efb02778e5c6c Mon Sep 17 00:00:00 2001
From: eap <eap@opencascade.com>
Date: Thu, 26 May 2005 06:47:33 +0000
Subject: [PATCH] IPAL8896. Make a preview transparen, propertional to mesh
 size, visible if no actors yet created, remove it at dlg closure.

---
 src/VISUGUI/VisuGUI_Plot3DDlg.cxx | 63 ++++++++++++++++++-------------
 1 file changed, 37 insertions(+), 26 deletions(-)

diff --git a/src/VISUGUI/VisuGUI_Plot3DDlg.cxx b/src/VISUGUI/VisuGUI_Plot3DDlg.cxx
index 61a3df73..f6d99331 100644
--- a/src/VISUGUI/VisuGUI_Plot3DDlg.cxx
+++ b/src/VISUGUI/VisuGUI_Plot3DDlg.cxx
@@ -40,6 +40,7 @@
 #include <qvalidator.h>
 #include <qtabwidget.h>
 
+#include <vtkUnstructuredGrid.h>
 #include <vtkDataSetMapper.h>
 #include <vtkRenderer.h>
 #include <vtkPlaneSource.h>
@@ -75,21 +76,24 @@ static void renderViewFrame(QAD_Study* theStudy)
 
 class TPlane : public SALOME_Actor
 {
+  float                mySize;
   vtkDataSetMapper*    myMapper;
   vtkPlaneSource*      myPlaneSource;
 
  public:
   // constructor
-  TPlane() {
+  TPlane(float planeSize): mySize( planeSize )
+  {
     Init();
   }
   // set plane parameters
-  void Set(float origin[3], float normal[3]) {
+  void Set(float origin[3], float normal[3])
+  {
     float point2[3], point1[3];
     vtkMath::Perpendiculars( normal, point1, point2, 0. );
     for ( int i = 0; i < 3; ++i ) {
-      point1[ i ] += origin[ i ];
-      point2[ i ] += origin[ i ];
+      point1[ i ] = point1[ i ] * mySize + origin[ i ];
+      point2[ i ] = point2[ i ] * mySize + origin[ i ];
     }
     myPlaneSource->SetOrigin( origin );
     myPlaneSource->SetPoint1( point1 );
@@ -107,6 +111,7 @@ class TPlane : public SALOME_Actor
     VisibilityOff();
     PickableOff();
     SetInfinitive(true);
+    SetOpacity(0.85);
     SetMapper( myMapper );
   }
   ~TPlane() {
@@ -362,34 +367,35 @@ void VisuGUI_Plot3DPane::onPrsType( int id )
 
 void VisuGUI_Plot3DPane::updatePreview()
 {
-  if ( myInitFromPrs )
+  if ( myInitFromPrs || !myPrs || !myViewFrame )
     return;
-  if ( PreviewChkB->isChecked() ) // show preview plane
+  bool fitall = false;
+  if ( PreviewChkB->isChecked() ) // place preview plane
   {
+    // get plane preview actor
     TPlane* planePreview = (TPlane*) myPreviewActor;
     if ( !planePreview ) {
-      myPreviewActor = planePreview = new TPlane;
-      if ( myViewFrame ) {
-        myViewFrame->AddActor( planePreview );
-        if ( !VisuGUI::GetActor( myPrs ))
-          myViewFrame->onViewFitAll();
-      }
+      myPreviewActor = planePreview = new TPlane( myPrs->GetInput()->GetLength() );
+      myViewFrame->AddActor( planePreview );
+      fitall = !VisuGUI::GetActor( myPrs );
     }
-    if ( myPrs ) // set plane parameters corresponding to control values
-    {
-      storePrsParams();
-      float normal[3], origin[3];
-      myPrs->GetPlot3DPL()->GetBasePlane( origin, normal, true );
-      planePreview->Set( origin, normal );
-      planePreview->SetVisibility( true );
-      restorePrsParams();
-    }
-  }
-  else if ( myPreviewActor ) // erase preview
-  {
-    myPreviewActor->SetVisibility( false );
+    // set plane parameters corresponding to control values
+    storePrsParams();
+    float normal[3], origin[3];
+    myPrs->GetPlot3DPL()->GetBasePlane( origin, normal, true );
+    planePreview->Set( origin, normal );
+    restorePrsParams();
   }
+  if ( myPreviewActor )
+    myPreviewActor->SetVisibility( PreviewChkB->isChecked() );
+
   renderViewFrame( myStudyFrame->getStudy() );
+
+  if ( fitall ) {
+    myPreviewActor->SetInfinitive(false);
+    myViewFrame->onViewFitAll();
+    myPreviewActor->SetInfinitive(true);
+  }
 }
 
 //=======================================================================
@@ -491,8 +497,13 @@ int VisuGUI_Plot3DPane::storeToPrsObject(VISU::Plot3D_i* thePrs)
 
 bool VisuGUI_Plot3DPane::check() 
 {
-  if ( myPreviewActor ) // erase preview
+  if ( myPreviewActor && myViewFrame) // erase preview
+  {
     myPreviewActor->SetVisibility( false );
+    myViewFrame->RemoveActor(myPreviewActor);
+    myPreviewActor->Delete();
+    myPreviewActor = 0;
+  }
 
   return true;
 }
-- 
2.39.2