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23 lines
848 B
C++
23 lines
848 B
C++
#ifndef ESCHER_RESPONDER_H
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#define ESCHER_RESPONDER_H
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#include <ion/events.h>
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class Responder {
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public:
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Responder(Responder * parentResponder) : m_parentResponder(parentResponder) {}
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virtual bool handleEvent(Ion::Events::Event event) { return false; }; // Default implementation does nothing
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virtual void didBecomeFirstResponder() {}
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virtual void willResignFirstResponder() {}
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virtual void didEnterResponderChain(Responder * previousFirstResponder) {}
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virtual void willExitResponderChain(Responder * nextFirstResponder) {}
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Responder * parentResponder() const { return m_parentResponder; }
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Responder * commonAncestorWith(Responder * responder);
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void setParentResponder(Responder * responder) { m_parentResponder = responder; }
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private:
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bool hasAncestor(Responder * responder) const;
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Responder * m_parentResponder;
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};
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#endif
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