Correct way to use QThreads

Shoud threads will generally be done with worker objects (subclassing QObject and appellant moveToThread) or subclass QThread? Various documentation pages contradict on this:

(1) the knowledge base article "The recommended method to use QThread" (http://supportforums.blackberry.com/t5/Cascades-Development-Knowledge/The-Recommended-Way-to-Use-QTh... said of "don't not subclass QThread!" and use a worker and QObject::moveToThread object.) She said that subclassing can cause problems with the signals and slots and that the main remaining reason to subclass must implement your own run-loop application.

(2) documentation of waterfalls "Starting threads with QThread" (https://developer.blackberry.com/cascades/reference/threads-starting.html) said subclass QThread and makes no mention of workers or the limitations of signal.

(3) the 'fundamentals of Cascades' (http://developer.blackberry.com/cascades/documentation/dev/fundamentals/) States that subclassing is the old way and that workers should be used, but it also States that the signals and slots are supported.

Like all things, the real answer depends very much what exactly what you are trying to accomplish.

If your goal is to start a time-consuming task in the background, QtConcurrent::run() is the best way (with QFuture/QFutureWatcher, most likely)

If your goal is to have a class that manages a set of operations with related data (e.g. database, networks, etc.) that you can interact with through signals/slots, 'new design' moveToThread is the right approach.

Of course if you just want to have a thread which encapsulates C API with functions of blocking, very well may want to just subclass QThread and implement run() directly.

I did everything above, depending on the situation.

Tags: BlackBerry Developers

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    Then like a seasoned Photoshop cs6 veteran, before I am now reduced to begging for an answer of how to do a single airbrush on the photo application that I used to do

    After about three minutes, and "outta there". to spend an hour and not being able to accumulate layers of color fade on the lettering in photoshop.

    (you can cut as many you want)

    How you you will find a tool that is not in the toolbar, the Airbrush tool?

    How do you get to the layer of air brush past on an object?

    Thank you

    (I'll probably take the House and my photoshop 5 allows you to do the job)

    In Photoshop 6 and earlier versions, the airbrush has existed as an independent tool. After that, it was moved to an option for the Brush tool.

    Airbrush simulates painting with an airbrush. When you move the pointer over an area, paint builds up as you hold down the mouse button. Brush hardness, opacity and options the Frother to how fast and how much the paint is applied. Click the button to enable or disable this option.

    If you can switch to the simulation of the voice, this video may help: How to use Airbrush in Photoshop CS6 - YouTube

  • Arabic font, it is not written in the correct way alphbet is not connected and he writes from left to right.  How can I solve this problem?

    Arabic font, it is not written in the correct way alphbet is not connected and he writes from left to right.  How can I solve this problem?

    CS6 and below: How to access the features of Arabic and Hebrew in Photoshop CS6 - YouTube

    Creative cloud. CC to CC 2015:

    First install the value in the parameter of English/Arabic language: change the language setting of your Cloud Creative applications

    Then enable Middle Eastern features in Photoshop: How to write in Arabic in Photoshop CC (and other adobe programs)

    I would like to know if it works.

    Gene

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