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https://github.com/jango73/qt-plus

Library of classes extending Qt
https://github.com/jango73/qt-plus

factory http library logger mjpeg qml qt server singleton static-analysis xml

Last synced: 3 months ago
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Library of classes extending Qt

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# qt-plus

Utility classes extending Qt's functionnality.



## Building



* Open /qt-plus.pro in QtCreator

* Build



## How to use



* As any other qt library

or

* Embed in app by including (in the .pro) one of:

  * qt-plus-nolib-basic.pri (to use basic functionalities)

  * qt-plus-nolib-web.pri (to use web classes)

  * qt-plus-nolib-qml.pri (to use qml parsing and analyzing classes)



## Classes

The full documentation for classes is available after project build, in the help directory.



Note:

Due to qdoc changes in Qt 5.12 (i think), the help files do not compile if using a recent Qt Creator version.

This issue is being fixed. Help may still be viewed in the related cpp file.



### QTree

Template for a tree structure. Each node has a value and 0 or more child nodes.  

May be used in a model where a variable can hold a scalar, a list or a tree.



### CSingleton

A template for singleton objects, based on the Singleton design pattern.



### CFactory

A template for a factory of objects, based on the Factory design pattern.



### CXMLNode

A helper class that wraps the *XML* and *JSON* facilities of Qt. Makes *DOM* style documents easier to use.



Attention : This class is really slow with very large documents because a lot of nodes are created and copied around...



### CLogger

A simple yet efficient logger.



### CImageUtilities

A singleton that provides helpful image processing functions.

Can do the following:

* Apply a filter matrix to a *QImage*

* Select pixels in a *QImage* by tint, resulting in a grayscale mask image

* Modify the HSV values of a *QImage*, using a *QImage* mask for pixel selection

* Colorize a *QImage*, using a *QImage* mask for pixel selection

* Split RGBA channels of a *QImage*

* Merge RGBA channels of several *QImage*s

* Split HSVA channels of a *QImage*

* Merge HSVA channels of several *QImage*s

* Find the dominant hue of a *QImage*

* Find the dominant luminance (value) of a *QImage*

* Compute the disparity map (depth) from two *QImage*s (left and right eye)



### CImageHistogram

A class that contains the histogram of a *QImage*.



### CLargeMatrix

A class that can hold an NxN matrix. Used, among other things, for image filtering.



### CTextGenerator

A class that generates random words, sentences, paragraphs, pages using random syllables.

Translated to C++ from the Javascript class 'fake-words'.

Original work is Copyright (c) anticoders: https://github.com/anticoders/fake-words



### QMLTreeContext

A full *QML* parser. 


Holds the contents of a *QML* file in the form of a tree, made of specialized classes for each kind of *QML* and JS declarations. 


* Can recreate the original *QML* file from the statement tree.

* Can convert the statement tree to *XML*.

* Has a known parsing problem : when using a prefix operator (like ++a)



### QMLAnalyzer

A class that allows static analysis of a *QML* statement tree (parsed using *QMLTreeContext*).  

Uses a grammar file in *XML* format that declares what to check and eventually reject.



### CSecureContext

A class that allows easy secure data exchange between servers and client of any kind. Based on *RSA* (copyright Nedim Srndic) and *ROKE*, a home made symetric encryption algorithm.



### CHTTPServer

Implements the base functionalities (GET and POST) of an *HTTP* server (see RFC 7230).  

Can do the following:

* Handles *GET* and *POST* requests (maybe more in the future)

* Serve local file ressources

* Define the accessible folders for ressources

* Generate dynamic *HTML* content via overridden methods.

* More or less efficient flood protection (has not been tested on large scale)

* No *https* for now



### CDynamicHTTPServer

Implements the base functionalities of a web server that generates dynamic HTML content.

A subclass of *CDynamicHTTPServer* may generate content in two ways:

* Using a *CWebComposer* to generate *HTML* tags in a string

* Using a *CWebFactory* to generate a *CWebPage*, which is a container of *CWebControls*



The second method works like *ASP*, with a view state that enables to transfer a serialized, compressed and eventually crypted (when someone wants to code it) version of the *CWebPage* between server and client.

This method enables 

See the documentation of *CWebPage* for more information.



### CRemoteControl

A server/client that acts somewhat like SSH on Linux. Enables remote file transfers and remote shell.



### CMJPEGClient

A client for *MJPEG* streams. Notifies via signal whenever a new image arrives.



### CMJPEGServer

A server that creates an *MJPEG* stream for clients, based on *CHTTPServer*.



### CTDMADevice

A class that mimics the *TDMA* concept. But instead of devices auto-synchronizing themselves, a master device does it.  

Can be used to transfer data from master <-> slave on a network with a single data channel.  

Inherits *QIODevice* and uses a *QIODevice* instance for input and output.



### CPIDController

A *PID* (Proportional Integral Derivative) controller for autopilots or mechanical controls.



### CAverager

A template used to average values.



### CGeoUtilities

Contains methods to convert from geo coordinates (latitude, longitude, altitude) to cartesian coordinates (x, y, z) and back.



## QML files



### ScatteredItemView.qml

This view shows a wireframe of a QML scene. It can be rotated and zoomed. Elements can be isolated.



# Third party files



## beautify.js

Copyright (c) 2007-2017 Einar Lielmanis, Liam Newman, and contributors



## Content of source/cpp/rsa

Copyright (c) 2008 Nedim Srndic. Originally hosted on http://code.google.com/p/rsa