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// File: DPrsStd_Sample.cxx
// Created: Mon Dec 27 16:10:35 1999
// Author: Sergey RUIN
// <srn@popox.nnov.matra-dtv.fr>
#include <TDF_Data.hxx>
#include <TDF_Label.hxx>
#include <TNaming_NamedShape.hxx>
#include <TPrsStd_AISPresentation.hxx>
#include <TPrsStd_AISViewer.hxx>
#include <AIS_InteractiveContext.hxx>
#include <AIS_InteractiveObject.hxx>
#include <V3d_Viewer.hxx>
#include <Quantity_NameOfColor.hxx>
#include <TPrsStd_DriverTable.hxx>
#include <TPrsStd_NamedShapeDriver.hxx>
#include <TPrsStd_PlaneDriver.hxx>
#include <TDataXtd_Plane.hxx>
#ifdef DEB
static void Sample()
{
// Starting with data framework
Handle(TDF_Data) DF = new TDF_Data();
TDF_Label aLabel = DF->Root();
//----------------------------------- TPrsStd_AISViewer ----------------------------------------
//==============================================================================================
// Setting the TPrsStd_AISViewer in the framework
Handle(V3d_Viewer) aViewer;
//... Initialization of aViewer
//Creating the new AIS_InteractiveContext
Handle(AIS_InteractiveContext) ctx = new AIS_InteractiveContext(aViewer);
//Creating the new TPrsStd_AISViewer attribute initialized with AIS_InteractiveContext
Handle(TPrsStd_AISViewer) aisviewer;
if( !TPrsStd_AISViewer::Has(aLabel) ) { //Check if there has already been set TPrsStd_AISViewer in the framework
aisviewer = TPrsStd_AISViewer::New(aLabel, ctx);
}
//Finding TPrsStd_AISViewer attribute in the DataFramework
if( TPrsStd_AISViewer::Find(aLabel, aisviewer) ) {
aisviewer->Update(); //Update the viewer associated with this attribute
}
//Getting AIS_InteractiveContext from TPrsStd_AISViewer may be done in two ways:
//1. If we have already gotten TPrsStd_AISViewer attribute (strored in a variable <aisviewer>)
Handle(AIS_InteractiveContext) context1 = aisviewer->GetInteractiveContext();
//2. Getting AIS_InteractiveContext directly
Handle(AIS_InteractiveContext) context2;
if( TPrsStd_AISViewer::Find(aLabel, context2) ) {
//do something...
}
//----------------------------------- TPrsStd_Driver and TPrsStd_DriverTable -------------------
//==============================================================================================
// All work for building AIS_InteractiveObject to be presented by TPrsStd_AISPresentation is done
// by drivers which are descendants of deferred class TPrsStd_Driver
// There is a map of drivers with Standard_GUID as a key.
// Adding driver to the map of drivers
Handle(TPrsStd_NamedShapeDriver) NSDriver = new TPrsStd_NamedShapeDriver();
Handle(TPrsStd_DriverTable) table = TPrsStd_DriverTable::Get();
Standard_GUID guid = TNaming_NamedShape::GetID();
table->AddDriver(guid, NSDriver);
// When the first time called TPrsStd_DriverTable loads standard drivers defined in TPrsStd package
// Getting driver from the map of drivers
Standard_GUID driverguid = TNaming_NamedShape::GetID();
Handle(TPrsStd_NamedShapeDriver) driver;
if( table->FindDriver(driverguid, driver) )
cout << "Driver was found " << endl;
else
cout << "Driver wasn't found" << endl;
// Driver can be used to build AIS_InteractiveObject for presenting the given label
Handle(TPrsStd_PlaneDriver) planedriver;
if( table->FindDriver(TDataXtd_Plane::GetID(), planedriver) ) {
TDF_Label planelabel;
// Finding planelabel ...
Handle(AIS_InteractiveObject) aisobject;
planedriver->Update(planelabel, aisobject);
if( !aisobject.IsNull() ) {
// Do something with aisobject ...
}
}
//----------------------------------- TPrsStd_AISPresentation ----------------------------------
//==============================================================================================
TDF_Label ShapeLabel;
// ... Setting TNaming_NamedShape to <ShapeLabel>
// Setting the new TPrsStd_AISPresentation to <ShapeLabel>
// It can be done in two different ways:
Handle(TPrsStd_AISPresentation) Presenation;
// 1. By giving to TPrsStd_AISPresentation attribute Standard_GUID of an attribute to be displayed:
// This GUID will be used to find driver for building AIS_InteractiveObject in the map of drivers
Presenation = TPrsStd_AISPresentation::Set( ShapeLabel, TNaming_NamedShape::GetID() );
// 2. Or by giving the attribute itself to TPrsStd_AISPresentation attribute:
// An ID of attribute will be used to find driver for building AIS_InteractiveObject in the map of drivers
Handle(TNaming_NamedShape) NS;
if( ShapeLabel.FindAttribute( TNaming_NamedShape::GetID(), NS) ) {
Presenation = TPrsStd_AISPresentation::Set( NS );
}
// Displaying (recomputation of presentation of attribute is done only if presentation is null)
Handle(TPrsStd_AISPresentation) PRS;
if( ShapeLabel.FindAttribute(TPrsStd_AISPresentation::GetID(), PRS) ) PRS->Display();
//After call of the method PRS->Display() the presentation of the attribute is marked as displayed in
//AIS_InteractiveContext but not in viewer, in order to draw the object in viewer last has to be updated
TPrsStd_AISViewer::Update(ShapeLabel); //Update presentation of the attribute in a viewer's window
// Erasing
if( ShapeLabel.FindAttribute(TPrsStd_AISPresentation::GetID(), PRS) ) PRS->Erase();
// The method Erase() marks presentation of attribute as erased in AIS_InteractiveContext;
// in order to make changes visible in a viewer's window viewer has to be updated
TPrsStd_AISViewer::Update(ShapeLabel); //Update viewer to erase presenation of the attribute in a viewer's window
//Presentation of the attribute is erased from viewer but
// stays in AIS_InteractiveContext
if( ShapeLabel.FindAttribute(TPrsStd_AISPresentation::GetID(), PRS) ) PRS->Erase(Standard_True);
TPrsStd_AISViewer::Update(ShapeLabel);
//Presentation of the attribute is erased
//from viewer and removed from AIS_InteractiveContext
//Checking if attribute is displayed in viewer
if( ShapeLabel.FindAttribute(TPrsStd_AISPresentation::GetID(), PRS) )
Standard_Boolean isDisplayed = PRS->IsDisplayed();
Handle(TPrsStd_AISPresentation) P;
if( ShapeLabel.FindAttribute(TPrsStd_AISPresentation::GetID(), P) ) {
// Updating and displaying presentation of the attribute to be displayed
P->Display(Standard_True);
TPrsStd_AISViewer::Update(ShapeLabel); //Update presenation of the attribute in a viewer's window
//Setting a color to the displayd attribute
P->SetColor(Quantity_NOC_RED);
TPrsStd_AISViewer::Update(ShapeLabel); //Update viewer to make changes visible to user
//Getting transparency the displayd attribute
Standard_Real transparency = P->Transparency();
//Getting AIS_InteractiveObject built and stored in the AIS_Presentation attribute
Handle(AIS_InteractiveObject) AISObject = P->GetAIS();
}
// ... Attribute is modified
//Updating presentation of the attribute in viewer
if( ShapeLabel.FindAttribute(TPrsStd_AISPresentation::GetID(), PRS) )
PRS->Update(); //Updates presentation of attribute in AIS_InteractiveContext
TPrsStd_AISViewer::Update(ShapeLabel); //Updates presentation in viewer
return;
}
#endif
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