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QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
Graphics
Gestures Library Reference
The Gestures library provides gesture recognizers to detect gestures through touch events that occur when you place one or more fingers on a touch screen.
Gestures Library Reference
The Gestures library primarily provides gesture recognizers to detect gestures through mtouch events that occur when you place one or more fingers on a touch screen.
Gesture Sets (set.h)
Data types and functions for gesture sets.
gestures_set_register_fail_cb()
Add a failure callback to a gesture set

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX Tool Suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
- Quickstart Guide
- System Architecture
  The System Architecture guide accompanies the QNX OS and is intended for both application developers and end-users.
- OS Components & Operations
- Graphics
  - Gestures Library Reference
    The Gestures library provides gesture recognizers to detect gestures through touch events that occur when you place one or more fingers on a touch screen.
    - Gestures Library Overview
      The Gestures library provides gesture recognizers to detect gestures through touch events that occur when you place one or more fingers on a touch screen.
    - Gesture Recognition
      Gesture recognition is performed by gesture recognizers that detect gestures through touch events.
    - User defined gestures
      You can define gesture recognizers to detect gestures that are not already supported by the Gestures library (custom gestures). Gesture recognizers that are used to detect custom gestures can be compiled with the application code and added to a gesture set in the same way that system gesture recognizers are added to a gesture set.
    - Gesture Tutorials
      Gestures tutorials aim to help you understand how to use the Gestures library in your own applications by providing step-by-step guides.
    - Gestures Library Reference
      The Gestures library primarily provides gesture recognizers to detect gestures through mtouch events that occur when you place one or more fingers on a touch screen.
      - Gesture Buckets (bucket.h)
        Data types and functions for gesture buckets.
      - Global Settings (defaults.h)
        Global settings for gesture timings.
      - Double Tap (double_tap.h)
        Definition of the double tap gesture.
      - Event Lists (event_list.h)
        Data types and functions for event lists.
      - Long Press (long_press.h)
        Definition of the long press gesture.
      - Pinch Gestures (pinch.h)
        Definition of the pinch gesture.
      - Press and Tap (press_and_tap.h)
        Definition of the press and tap gesture.
      - Rotate Gesture (rotate.h)
        Definition of the rotate gesture.
      - Gesture Sets (set.h)
        Data types and functions for gesture sets.
        gestures_set_add()
        Add a gesture to a gesture set
        gestures_set_alloc()
        Allocate and initialize a new gesture set
        gestures_set_fail_f
        Callback function for gesture set failure
        gestures_set_free()
        Free a gesture set
        gestures_set_process_event()
        Process a touch event at the gesture set level
        gestures_set_process_event_list()
        Process the event list
        gestures_set_register_fail_cb()
        Add a failure callback to a gesture set
      - Swipe Gesture (swipe.h)
        Definition of the swipe gesture.
      - Tap Gesture (tap.h)
        Definition of the tap gesture.
      - Gesture Timers (timer.h)
        Functions and datatypes for gestures timers.
      - Triple Tap (triple_tap.h)
        Definition of the triple tap gesture.
      - Two Finger Pan (two_finger_pan.h)
        Definition of the two finger pan gesture.
      - Two Finger Tap (two_finger_tap.h)
        Definition of the two finger tap gesture.
      - Two Finger Double Tap (two_finger_double_tap.h)
        Definition of the double tap gesture.
      - Data Types and Helper Functions (types.h)
        Common data types and helper functions.
  - Image Library Reference
  - Input Events Library Reference
    The Input Events library provides the framework necessary for Screen Graphics Subsystem to communicate with your touch driver.
  - OpenWF Configuration Developer's Guide
    If you are integrating a new display, you must configure and provide the parameters of your display based on its specifications via the OpenWF Display Configuration API (Wfdcfg Library).
  - OpenWF Display Server User's Guide
    The OpenWF Display Server (wfd-server) is a resource manager that provides applications the ability to show image buffers directly to the display controller via the OpenWF Display API.
  - Screen Graphics Subsystem Developer's Guide
    QNX Screen Graphics Subsystem is a graphics framework that provides all the functionality necessary to develop interactive user experiences.
  - Video Capture Developer's Guide
    The video capture framework provides applications the ability to capture frames from a video input source. These frames can be passed to a graphics component such as Screen for display.
- Programming
- System Security Guide
  The QNX System Security Guide is intended for both system integrators who are responsible for the security of a QNX OS system and developers who want to create a QNX OS resource manager free from vulnerabilities.
- Utilities & Libraries
- Migrating to QNX OS 8.0
QNX Software in the Cloud
QNX Software in the Cloud enables developers to use the QNX OS in the Amazon cloud environment.
QNX Toolkit for Visual Studio Code
This User's Guide describes the QNX^® Toolkit for Visual Studio Code. The guide introduces you to the QNX Toolkit by explaining the QNX development environment and how to build, run, and debug your QNX^® Operating System (OS) applications and systems.
QNX Hypervisor User's Guide
This User's Guide explains the QNX hypervisor architecture and provides instructions for installing and running a QNX Hypervisor system, changing system components and configuration, and using hypervisor features such as virtual devices (vdevs).
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

gestures_set_register_fail_cb()

QNX SDP8.0Gestures Library ReferenceAPIDeveloperProgramming

Add a failure callback to a gesture set

Synopsis:

#include <gestures/set.h>

void gestures_set_register_fail_cb(struct gestures_set *set,
                                   gestures_set_fail_f callback)

Arguments:

set: A pointer to the gesture set.
callback: The callback function to add.

Library:

libgestures

Description:

This function adds the specified callback function to the specified gesture set.

Returns:

Nothing.

Page updated: August 11, 2025