Platform Package reference: Function _RequestUpdate()

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Platform Package reference

Function EwAlloc()

Function EwAddHeapMemoryPool()

Function EwAllocUserColor()

Function EwAnyPendingSignals()

Function EwBeginUpdate()

Function EwBeginUpdateArea()

Function EwColorToIndex()

Function EwCompString()

Function EwConfigViewport()

Function EwCreateBitmap()

Function EwDoneGraphicsEngine()

Function EwDoneHeap()

Function EwDoneViewport()

Function EwDumpHeap()

Function EwEnableGfxTaskTracing()

Function EwEndUpdate()

Function EwFindUserColor()

Function EwFree()

Function EwFreeBitmap()

Function EwFreeUserColor()

Function EwGetAutoObject()

Function _GetAutoObject()

Function EwGetHeapInfo()

Function EwGetLanguage()

Function EwGetStringLength()

Function EwGetUtf8StringLength()

Function EwGetStyles()

Function EwIndexToColor()

Function EwInitGraphicsEngine()

Function EwInitHeap()

Function EwInitInvocations()

Function EwInitViewport()

Function EwInvoke()

Function EwInvokeCopy()

Function EwLockBitmap()

Function EwLockObject()

Function _LockObject()

Function EwModifyBitmapPalette()

Function EwNewColor()

Function EwNewObject()

Function EwNewObjectIndirect()

Function _NewObject()

Function EwNewPoint()

Function EwNewRect()

Function EwNewString()

Function EwNewStringAnsi()

Function EwNewStringChar()

Function EwNewStringUtf8()

Function EwNextTimerExpiration()

Function EwPrint()

Function EwPrintPerfCounters()

Function EwPrintProfilerStatistic()

Function EwProcessSignals()

Function EwProcessTimers()

Function EwReclaimMemory()

Function EwRegisterFlashAreaReader()

Function _RequestUpdate()

Function EwResetPerfCounters()

Function EwSetLanguage()

Function EwSetStackAddressArea()

Function EwSetStyles()

Function EwSetUserColor()

Function EwStringToAnsi()

Function EwStringToUtf8()

Function EwUnlockBitmap()

Function EwUnlockObject()

Function _UnlockObject()

Function EwVerifyHeap()

Basic Data Type Definitions

Type XBitmapLock

Type XInvokeProc

Type XViewportProc

Error and Warning Codes

Platform Package reference: Function _RequestUpdate()

Description of the function _RequestUpdate() available in all Platform Packages for WebGL JavaScript compatible target systems. This function is intended to be used when integrating the Embedded Wizard created GUI application with the underlying graphics subsystem, graphics hardware or other external GUI applications coexisting on the same system.

Declaration

function _RequestUpdate()

Discussion

The function _RequestUpdate() triggers the application to perform the next update cycle. Usually, updates are performed automatically in response to user interactions or timer expirations. However, if Embedded Wizard functions are invoked from JavaScript code running outside of the Embeded Wizard application (e.g. in context of a network event handler), the application does not know anything about that event. In such case your implementation need to invoke _RequestUpdate() explicitly. For example:

/* Obtain access to the global autoobject 'Application::DeviceObject' */ var device = EmWiApp._GetAutoObject( EmWiApp.Application.DeviceObject ); /* In context of the object invoke the method 'EngineStarted' */ device.EngineStarted( 1369 ); /* Trigger the update of the GUI application */ EmWiApp._RequestUpdate();