X11Events.h

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// @(#)root/graf2d:$Id$
// Author: Timur Pocheptsov   16/02/2012
 
/*************************************************************************
 * Copyright (C) 1995-2012, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#ifndef ROOT_X11Events
#define ROOT_X11Events
 
#include <deque>
 
#include "GuiTypes.h"
 
#include <Foundation/Foundation.h>
 
//////////////////////////////////////////////////////////////////////////
//                                                                      //
// EventTranslator class translates Cocoa events to 'ROOT's X11' events.//
// In 90% cases there is no direct mapping from Cocoa event to          //
// X11 event: Cocoa events are more simple (from programmer's POV).     //
// EventTranslator tries to emulate X11 behavior.                       //
//                                                                      //
//////////////////////////////////////////////////////////////////////////
 
class TGCocoa;
 
@protocol X11Window;
 
@class QuartzWindow;
@class NSEvent;
@class NSView;
 
namespace ROOT {
namespace MacOSX {
namespace X11 {//X11 emulation for Cocoa.
 
enum PointerGrab {
   kPGNoGrab,
   kPGImplicitGrab,
   kPGActiveGrab,
   kPGPassiveGrab
};
 
typedef std::deque<Event_t> EventQueue_t;
 
class EventTranslator {
   friend class ::TGCocoa;
public:
   EventTranslator();
 
   void GenerateConfigureNotifyEvent(NSView<X11Window> *view, const NSRect &newFrame);
   void GenerateDestroyNotify(unsigned /*winID*/);
   void GenerateExposeEvent(NSView<X11Window> *view, const NSRect &exposedRect);
 
   void GenerateCrossingEvent(NSEvent *theEvent);
   void GeneratePointerMotionEvent(NSEvent *theEvent);
 
   void GenerateButtonPressEvent(NSView<X11Window> *eventView, NSEvent *theEvent, EMouseButton btn);
   void GenerateButtonReleaseEvent(NSView<X11Window> *eventView, NSEvent *theEvent, EMouseButton btn);
 
   void GenerateKeyPressEvent(NSView<X11Window> *eventView, NSEvent *theEvent);
   void GenerateKeyReleaseEvent(NSView<X11Window> *eventView, NSEvent *theEvent);
 
   void GenerateFocusChangeEvent(NSView<X11Window> *eventView);
 
   void SetPointerGrab(NSView<X11Window> *grabView, unsigned eventMask, bool ownerEvents);
   void CancelPointerGrab();
 
   void SetInputFocus(NSView<X11Window> *focusView);
   unsigned GetInputFocus()const;
 
   //Window winID was either deleted or unmapped.
   //If it's a grab view or a parent of a grab view - cancel grab.
   //If it's a "view under pointer" - reset view under pointer.
   //If it's a focus view, cancel focus.
   void CheckUnmappedView(Window_t winID);
 
   bool HasPointerGrab()const;
 
private:
 
   //Used both by grab and non-grab case.
   void GenerateCrossingEventNoGrab(NSEvent *theEvent);
   void GenerateCrossingEventActiveGrab(NSEvent *theEvent);
 
   void GeneratePointerMotionEventNoGrab(NSEvent *theEvent);
   void GeneratePointerMotionEventActiveGrab(NSEvent *theEvent);
 
   void GenerateButtonPressEventNoGrab(NSView<X11Window> *view, NSEvent *theEvent, EMouseButton btn);
   void GenerateButtonPressEventActiveGrab(NSView<X11Window> *view, NSEvent *theEvent, EMouseButton btn);
 
   void GenerateButtonReleaseEventNoGrab(NSView<X11Window> *eventView, NSEvent *theEvent, EMouseButton btn);
   void GenerateButtonReleaseEventActiveGrab(NSView<X11Window> *eventView, NSEvent *theEvent, EMouseButton btn);
 
   void GenerateKeyPressEventNoGrab(NSView<X11Window> *eventView, NSEvent *theEvent);
   void GenerateKeyReleaseEventNoGrab(NSView<X11Window> *eventView, NSEvent *theEvent);
 
   void GenerateKeyEventActiveGrab(NSView<X11Window> *eventView, NSEvent *theEvent);//Both press/release events.
   void GenerateKeyEventForView(NSView<X11Window> *view, NSEvent *theEvent);//Both press/release events.
 
   void FindButtonGrab(NSView<X11Window> *fromView, NSEvent *theEvent, EMouseButton btn);
   void FindKeyGrabView(NSView<X11Window> *eventView, NSEvent *theEvent);
 
   NSView<X11Window> *fViewUnderPointer;
 
   PointerGrab fPointerGrabType;
   unsigned fGrabEventMask;
   bool fOwnerEvents;
 
 
   NSView<X11Window> *fButtonGrabView;
   NSView<X11Window> *fKeyGrabView;
   NSView<X11Window> *fFocusView;
   EMouseButton fImplicitGrabButton;
 
   EventQueue_t fEventQueue;
};
 
void MapUnicharToKeySym(unichar key, char *buf, Int_t len, UInt_t &rootKeySym);
Int_t MapKeySymToKeyCode(Int_t keySym);
NSUInteger GetCocoaKeyModifiersFromROOTKeyModifiers(UInt_t rootKeyModifiers);
 
UInt_t GetModifiers();//Mouse buttons + keyboard modifiers.
 
}//X11
}//MacOSX
}//ROOT
 
#endif