108 lines
3.8 KiB
C++
108 lines
3.8 KiB
C++
/*
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BuilderTool(Test) - specialized form of the acyclic visitor
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Copyright (C) CinelerraCV
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2007, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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#include "common/test/run.hpp"
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#include "proc/mobject/builder/buildertool.hpp"
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#include "proc/asset/category.hpp"
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#include "proc/asset/media.hpp"
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#include "proc/mobject/session/clip.hpp"
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#include <iostream>
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using std::string;
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using std::cout;
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namespace mobject
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{
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namespace builder
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{
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namespace test
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{
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using session::Clip;
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using session::AbstractMO;
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using cinelerra::visitor::Applicable;
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/*******************************************************************
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* @test the generic visitor pattern specialized for treating
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* MObjects in the builder. Because the generic visitor
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* implementation is already covered by
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* \link VisitingTool_test, it is sufficient to test
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* the specialisation to the builder.
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* \par
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* Besides using existing MObject types (at the moment session::Clip),
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* we create inline a yet-unknown new MObject subclass. When passing
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* such to any BuilderTool subclass, the compiler enforces the definition
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* of a catch-all function, which is called, when there is no other
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* applicable \c treat(MO&) function. Note further, whithin the specific
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* treat-functions we get direct references, whithout interfering with
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* Placements and memory management. (Is this a good idea? it allows
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* client code to bypass the Placement (Handle). At least, I think
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* it is not really a problem...)
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*/
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class BuilderTool_test : public Test
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{
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virtual void run(Arg arg)
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{
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class DummyMO : public AbstractMO
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{
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public:
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DummyMO() { };
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virtual bool isValid() const { return true;}
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};
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class TestTool : public BuilderTool,
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public Applicable<Clip>,
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public Applicable<AbstractMO>
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{
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void treat (Clip& c) { cout << "media is: "<< str(c.getMedia()) <<"\n"; }
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void treat (Buildable&){ cout << "catch-all-function called.\n"; }
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void treat (AbstractMO&){ cout << "catch-all-MO.\n"; }
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};
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TestTool t1;
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BuilderTool& tool (t1);
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DummyMO dumm;
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PMO clip = asset::Media::create("test-1", asset::VIDEO)->createClip();
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clip->apply (tool);
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dumm.apply (tool);
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}
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};
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/** Register this test class... */
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LAUNCHER (BuilderTool_test, "unit builder");
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} // namespace test
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} // namespace builder
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} // namespace mobject
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