Alexiuscrow

class ButtonControlled
{
public:
  virtual void decide() = 0;  
};

class Elevator : ButtonControlled
{
private:
  Button* button;
  virtual void decide();
};

class Button
{
private:
  ButtonControlled* controlled;
public:
  Button(ButtonControlled &controlled);
  void push()
  {
    controlled->decide();
  }
};

Elevator::Elevator()
{
  button = new Button(*this);
}

<target name="init-test" depends="prepare">
                <path id="test.classpath">
			<fileset dir="${lib}">
				<include name="*.jar" />
			</fileset>
			<pathelement location="${project.classes.build}" />
			<pathelement path="${test.build}" />
			<pathelement path="${test.build}/etc" />
			<pathelement path="${test.build}/etc/test" />
			<pathelement path="${test.build}/etc/mappings" />
		</path>
		<fileset id="test.fileset" dir="${test}">
			<include name="**/${test.class.pattern}.java"/>
			<exclude name="**/Abstract${test.class.pattern}.java"/>
			<exclude name="**/Base${test.class.pattern}.java"/>
			<exclude name="**/TestUtils.java"/>
		</fileset>
		<copy todir="${test.build}/etc/test">
			<fileset dir="${etc}/test"/>
		</copy>
		<copy todir="${test.build}/etc/test">
			<fileset dir="${etc}/mappings"/>
		</copy>
		<copy file="${etc}/hibernate.cfg.xml" todir="${test.build}/etc"/>
	</target>

	<target name="compile-test" depends="compile, run-checks">
		<javac srcdir="${test}"
			destdir="${test.build}"
			classpathref="run.classpath"
			source="${minimum.javaversion}"
			target="${minimum.javaversion}"
			debug="${debug.mode}"
			encoding="UTF-8"
			includeantruntime="no" />
		<copy todir="${test.build}">
			<fileset dir="${test}">
				<exclude name="**/*.java" />
			</fileset>
		</copy>
	</target>

	<target name="run-test" depends="init-test, compile-test">
		<mkdir dir="${test.xml}" />

		<junit 
			haltonfailure="off"
			haltonerror="off"
			errorproperty="test.failed"
			failureproperty="test.failed"
			showoutput="no"
			printsummary="yes"
			includeantruntime="yes"
			dir="${test.build}"
			fork="true">
			<jvmarg value="-Dfile.encoding=UTF8"/>
			<classpath>
				<path refid="test.classpath" />
			</classpath>
			<formatter type="xml"/>
			<batchtest todir="${test.xml}">
				<fileset refid="test.fileset" />
			</batchtest>
		</junit>
	</target>

	<target name="test" depends="run-test" description="Run unit tests">
		<fail if="test.failed"
			message="At least one test has failed. See logs (in ${test.xml}) for details (use the target test-report to run the test with a report)" />
	</target>

#icon:before {
    ...
}
#icon.second:before {
    .....
}

1. Печатаю на принтере метку.
2. Показываю её программе.
3. Ассоциирую с меткой картинку или текст.
4. При наведении камеры на метку, поверх неё на фоне всего остального в реальном времени отображается привязанный к ней текст.