40 lines
1.4 KiB
C
40 lines
1.4 KiB
C
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#ifndef ISCREENEVENTHANDLER_H
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#define ISCREENEVENTHANDLER_H
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#include "IInterface.h"
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// the platform screen should define this
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class CEvent;
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class IScreen;
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// the interface through which IScreen sends notification of events.
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// each platform will derive two types from IScreenEventHandler, one
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// for handling events on the primary screen and one for the
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// secondary screen. the header file with the IScreen subclass for
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// each platform should define the CEvent type, which depends on the
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// type of native events for that platform.
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class IScreenEventHandler : public IInterface {
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public:
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// manipulators
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// called if the screen is unexpectedly closing. this implies that
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// the screen is no longer usable and that the program should
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// close the screen and possibly terminate.
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virtual void onError() = 0;
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// called when the screensaver is activated or deactivated
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virtual void onScreensaver(bool activated) = 0;
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// called for each event before event translation and dispatch. return
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// true to skip translation and dispatch. subclasses should call the
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// superclass's version first and return true if it returns true.
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virtual bool onPreDispatch(const CEvent* event) = 0;
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// called by mainLoop(). iff the event was handled return true and
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// store the result, if any, in m_result, which defaults to zero.
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virtual bool onEvent(CEvent* event) = 0;
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};
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#endif
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