Table Of Contents

Query Input Devices (G Dataflow)

Version:
    Last Modified: January 12, 2018

    Obtains information about the devices connected to the computer.

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    error in

    Error conditions that occur before this node runs.

    The node responds to this input according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Default: No error

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    joystick info

    An array of information about the joysticks connected to the computer.

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    axes total

    Total number of axes for each joystick connected to the computer.

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    buttons total

    Total number of buttons for each joystick connected to the computer.

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    pov total

    Total number of points of view for each joystick connected to the computer.

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    device name

    Device name of each joystick connected to the computer.

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    keyboard info

    An array of information about the keyboards connected to the computer.

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    buttons total

    Number of keys on the keyboard connected to the computer.

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    device name

    Device name of the keyboard connected to the computer.

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    mouse info

    An array of information about the mouse connected to the computer.

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    axes total

    Total number of axes for the mouse connected to the computer.

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    buttons total

    Total number of buttons for the mouse connected to the computer.

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    device name

    Device name of the mouse connected to the computer.

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    error out

    Error information.

    The node produces this output according to standard error behavior.

    Standard Error Behavior

    Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

    error in does not contain an error error in contains an error
    If no error occurred before the node runs, the node begins execution normally.

    If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

    If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

    Behavior with Multiple Devices of the Same Type

    If you connect more than one mouse or keyboard to your computer, this node recognizes only the first mouse or keyboard.

    Where This Node Can Run:

    Desktop OS: Windows

    FPGA: Not supported

    Web Server: Not supported in VIs that run in a web application


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