ฝัง
- เผยแพร่เมื่อ 20 ก.ค. 2024
- An introductory explanation to Qt Signals and Slots mechanism. If you are new to using Qt, this video should be helpful to you.
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This is the same as every other signals & slots explanation on TH-cam. I wish someone would show a non-trivial example. Create new objects with new signals and slots and link them together.
Well explained! Thank you mate, It really really helped me to understand this concept!
Thanks, this really helped me understand them more!
Thank you very much for the very clear explanation 🙏🏻☺️🌷
Nice video, but the question is how we can pass this param1 that you show us in the end of the video from the scope where we have written the connect function? That's what I have never find a way to do yet.
Thank u man really 👋🏻 gratulation from Europa
Very clear 💯
Great tutorial.
14:25 i've seen in one of those c++ seminars that emit is nothing, it's literally there to make reading the code easier.
It's literally defined as:
#define emit
thank you!
Thanks! Very informative. I had used qt signal slot in past but was not this clear about various connection possibilities. NOW I am thinking how I can do this in native c++11/14 or 17... w/o qt in my non-ui projects.
Seems like a fun side project. I suppose it depends on how many of the Qt features you need, but you'd more than likely need to deal with function pointers.
Thanks
This video is not about how S & S work in Qt, but about how to use S & S. Reading "how S & S work", I expected to learn more about the meta-object compiler.
I can see your dilemma, but I think the title is appropriate. For instance, I would think what you're looking for is about "how the meta-object compiler works" or S & S connections.
Nice explanation, but lacks how slots and signals gets compiled, the difference between slots and signals or send message to object or other similar situation, in the final compiled executable!
There are definitely more things to know about signals and slots. My intent was to get a complete novice started. Perhaps I should put that on the thumbnail or title 🤔
@@VelcodeCS no need, it is ok, maybe an advanced video would be more appreciated!
@@VelcodeCS idea for new basic video: System.Windows.Forms::DoEvents() is the Microsoft for processing all pending messages (OS-UI) and Qt Creator is qApp->processEvents(QEventLoop::AllEvents); which allows, for example: button_onclick { button->enabled=false; for(a=0; aprocessEvents(QEventLoop::AllEvents); … long processing … } button->enabled=true; return; } this simple solution is also necessary whenever the CPU goes up 100%, and using qApp->processEvents(QEventLoop::AllEvents); will make it stay at 15% or less!
@ Good ideas! I've been busy finishing school, but I should have more time soon to get back to making videos. I use the processEvents function also for the progress bars.
Thanks for the great explanation however... your design has one flaw maybe, because when the villagers react they prepare for an invation... 🤷♀️🤷🤷♀️🤷🤷🤷♀️🤷♀️🤷♀️ So now, what does that mean exactly? Should we invite these people or prepare for battle?
That's up to you. The reaction is the slot. What goes in the slot is up to the programmer.
@@VelcodeCS Sure... but you are the programmer here, so I thought the villagers could be a bit confused about what "invation" really means... 🤷🤷♀️
Not necessarily, the purpose of the video is to explain signals/slots conceptually. No need to fill unnecessary gaps (video already long as is).
@@VelcodeCS Maybe you don't get my point : 🙂 "invation" is a typo...
Oh, I forget what I do/say on these. 😅
That's how to use signal and slots,not how signal slots work