# dmxbackend.h File Reference

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## Functions

pointer | dmxBackendCreatePrivate (DeviceIntPtr pDevice)
void | dmxBackendDestroyPrivate (pointer private)
void | dmxBackendInit (DevicePtr pDev)
void | dmxBackendLateReInit (DevicePtr pDev)
void | dmxBackendMouGetInfo (DevicePtr pDev, DMXLocalInitInfoPtr info)
void | dmxBackendKbdGetInfo (DevicePtr pDev, DMXLocalInitInfoPtr info)
void | dmxBackendCollectEvents (DevicePtr pDev, dmxMotionProcPtr motion, dmxEnqueueProcPtr enqueue, dmxCheckSpecialProcPtr checkspecial, DMXBlockType block)
void | dmxBackendProcessInput (pointer private)
int | dmxBackendFunctions (pointer private, DMXFunctionType function)
void | dmxBackendUpdatePosition (pointer private, int x, int y)

## Detailed Description

Interface to backend input device support.

See also:
  dmxbackend.c
  dmxcommon.c

## Function Documentation

void dmxBackendCollectEvents | ( | DevicePtr | pDev,
|  | dmxMotionProcPtr | motion,
|  | dmxEnqueueProcPtr | enqueue,
|  | dmxCheckSpecialProcPtr | checkspecial,
|  | DMXBlockType | block |
| ) |  |  |

Get events from the X queue on the backend servers and put the events into the DMX event queue.

References _DMXScreenInfo::beDisplay, DMX_ABSOLUTE, DMX_RELATIVE, dmxBackendFindWindow(), dmxBackendGetEvent(), dmxBackendPendingMotionEvent(), dmxCommonRestoreState(), dmxCommonSaveState(), DMXDBG2, DMXDBG4, DMXDBG5, DMXDBG7, DMXDBG8, DMXDBG9, dmxError, dmxFatal, dmxLog(), dmxSync(), _DMXScreenInfo::index, _DMXScreenInfo::name, _DMXScreenInfo::rootHeight, _DMXScreenInfo::rootWidth, _DMXScreenInfo::rootX, _DMXScreenInfo::rootXOrigin, _DMXScreenInfo::rootY, _DMXScreenInfo::rootYOrigin, and _DMXScreenInfo::scrnWin.

pointer dmxBackendCreatePrivate | ( | DeviceIntPtr | pDevice | ) |

Create and return a private data structure.

void dmxBackendDestroyPrivate | ( | pointer | private | ) |

Destroy the private data structure. No checking is performed to verify that the structure was actually created by dmxBackendCreatePrivate.

int dmxBackendFunctions | ( | pointer | private,
|  | DMXFunctionType | function |
| ) |  |  |

Process DMXFunctionType functions. The only function handled here is to acknowledge a pending server shutdown.

References DMX_FUNCTION_TERMINATE.

void dmxBackendInit | ( | DevicePtr | pDev | ) |

Initialized the backend device described by pDev.

References DMX_LOCAL_KEYBOARD, DMX_LOCAL_MOUSE, dmxBackendComputeCenter(), dmxBackendInitPrivate(), dmxBackendSameDisplay(), and _DMXScreenInfo::index.

void dmxBackendKbdGetInfo | ( | DevicePtr | pDev,
|  | DMXLocalInitInfoPtr | info |
| ) |  |  |

Get information about the backend keyboard (for initialization).

References dmxCommonKbdGetInfo(), dmxCommonKbdGetMap(), _DMXLocalInitInfo::focusClass, _DMXLocalInitInfo::freemap, _DMXLocalInitInfo::kbdFeedbackClass, _DMXLocalInitInfo::keyboard, _DMXLocalInitInfo::keyClass, _DMXLocalInitInfo::keySyms, and _DMXLocalInitInfo::modMap.

void dmxBackendLateReInit | ( | DevicePtr | pDev | ) |

Re-initialized the backend device described by pDev (after a reconfig).

References dmxBackendComputeCenter(), dmxBackendInitPrivate(), dmxBackendSameDisplay(), dmxBackendUpdatePosition(), DMXDBG1, dmxGetGlobalPosition(), and dmxInvalidateGlobalPosition().

void dmxBackendMouGetInfo | ( | DevicePtr | pDev,
|  | DMXLocalInitInfoPtr | info |
| ) |  |  |

Get information about the backend pointer (for initialization).

References _DMXScreenInfo::beHeight, _DMXScreenInfo::beWidth, _DMXLocalInitInfo::buttonClass, dmxBackendInitPrivate(), dmxCommonMouGetMap(), _DMXLocalInitInfo::map, _DMXLocalInitInfo::maxres, _DMXLocalInitInfo::maxval, _DMXLocalInitInfo::minres, _DMXLocalInitInfo::minval, _DMXLocalInitInfo::numButtons, _DMXLocalInitInfo::numRelAxes, _DMXLocalInitInfo::ptrFeedbackClass, _DMXLocalInitInfo::res, and _DMXLocalInitInfo::valuatorClass.

void dmxBackendProcessInput | ( | pointer | private | ) |

Called after input events are processed from the DMX queue. No event processing actually takes place here, but this is a convenient place to update the pointer.

References DMXDBG4, DMXDBG6, dmxScreens, and dmxSync().

void dmxBackendUpdatePosition | ( | pointer | private,
|  | int | x,
|  | int | y |
| ) |  |  |

This routine is called from dmxCoreMotion for each motion event. x and y are global coordinants.

References dmxBackendFindOverlapping(), dmxBackendOffscreen(), dmxBackendPendingMotionEvent(), dmxBackendSameDisplay(), dmxCheckCursor(), dmxConsoleCapture(), dmxConsoleUncapture(), DMXDBG0, DMXDBG2, DMXDBG5, DMXDBG9, dmxHideCursor(), dmxScreens, and dmxSync().

Referenced by dmxBackendLateReInit().

Generated June 29, 2004 for Distributed Multihead X by doxygen 1.3.4. </addres>