CADSoftTools

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void __fastcall TformMain::mOpenSTEPClick(TObject *Sender)
{
  OpenDialog1->Filter =  "STEP Files(*.stp, *.step)|*.stp;*.step";

  if(OpenDialog1->Execute())
  {
    CloseNavigators();
    //Loading TsgDrawingNavigator *FsgPaintBox;
    FsgPaintBox->Picture->LoadFromFile(OpenDialog1->FileName);
    FsgPaintBox->BeginUpdate();
    try
    {
      ((TsgCADImage *)(FsgPaintBox->Picture->Graphic))->CustomDraw = false;
      FsgPaintBox->FitToSize();
    }
    __finally
    {
      FsgPaintBox->EndUpdate();
    }
    //Loading Tsg3DDrawingNavigator *stepDrawingNavigator;
    if(LoadedCADImage)
    {
      if(stepDrawingNavigator->Empty() && (stepDrawingNavigator->LoadFromImage == NULL))
      {
        //first time loaded
        try
        {
          Screen->Cursor = crHourGlass;
          stepDrawingNavigator->LoadFromConverter(LoadedCADImage->Converter, LoadedCADImage);
        }
        __finally
        {
          Screen->Cursor = crDefault;
        }
      }
      else
      {
        //next time loaded
        if(stepDrawingNavigator->LoadFromImage != NULL)
        {
          LoadViewFromCADImage(LoadedCADImage,stepDrawingNavigator);
        }
      }
      Tsg3DShowingStyles style;
      style << ssSmoothShading << ssLighting;
      stepDrawingNavigator->ShowingStyle = style;
      stepDrawingNavigator->FitToSize();
      FsgPaintBox->Visible = false;
      stepDrawingNavigator->Visible = true; //only 3D visible

      //TESTS:
      int entitiesCount;
      String entityName;
      TsgDXFEntity *entity;
      entitiesCount = LoadedCADImage->Converter->Counts[csEntities];
      //entitiesCount in case of very big STEP file = 1 (why?)
      for(int i=0; i<entitiesCount; i++)
      {
        entity = LoadedCADImage->Entities[i]; //this is siome general entity (some single block) (why?)
        if(entity)
        {
          entityName = entity->Name; 
          entityName = entity->EntName();
        }
      }
    }
  }
}
//---------------------------------------------------------------------------