Issues with getter and setter methods
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@ddryomyss said in Issues with getter and setter methods:
void MainWindow::mousePressEvent(QMouseEvent *mpe)
{
paintScene ps;ps is local to that function. Hence it's going to be empty and also destroyed a the end of the function.
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The issue is your understanding of the variable scope. As I already said, you create a function local object of the type paintScene. You are getting the correct value since it's initialised to false.
You should be using your class instance of paintScene.
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@SGaist and so? I don't really get, why ps.get() do not return to the value of start_pt.
If I will describe get() function like that:
bool paintScene::get() { return true; }numeration will work. Where is the problem?
@ddryomyss you didn't read up on your basics, like I suggested in your other thread!
What you did, is:
You're in your house, and you create a box there. The box was empty, so you placed a banana in it.
Then you went to your garden shed and leave your box behind. But now you're missing your box! So you create an other a box there, the same way you did in your house. Its also empty, but you're now wondering why there's no banana in!
Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct
Q: What's that?
A: It's blue light.
Q: What does it do?
A: It turns blue. -
@ddryomyss you didn't read up on your basics, like I suggested in your other thread!
What you did, is:
You're in your house, and you create a box there. The box was empty, so you placed a banana in it.
Then you went to your garden shed and leave your box behind. But now you're missing your box! So you create an other a box there, the same way you did in your house. Its also empty, but you're now wondering why there's no banana in!
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@ddryomyss you didn't read up on your basics, like I suggested in your other thread!
What you did, is:
You're in your house, and you create a box there. The box was empty, so you placed a banana in it.
Then you went to your garden shed and leave your box behind. But now you're missing your box! So you create an other a box there, the same way you did in your house. Its also empty, but you're now wondering why there's no banana in!
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@ddryomyss you didn't read up on your basics, like I suggested in your other thread!
What you did, is:
You're in your house, and you create a box there. The box was empty, so you placed a banana in it.
Then you went to your garden shed and leave your box behind. But now you're missing your box! So you create an other a box there, the same way you did in your house. Its also empty, but you're now wondering why there's no banana in!
@J-Hilk I know that I am weak with basics. I was kind of forced to jump right into practice, so now it hurts badly a lot of times (lack of basic knowledge, I mean). Maybe you have any recommendations on sources of info? Something like a clear study plan (maybe a book, or course of lectures). Or maybe there was a post here on this topic? I'll be grateful to hear any recommendations from you (:
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If I may be so bold as to suddenly insert myself...
@ddryomyss It is refreshing and heartening to see you acknowledge your weaknesses. That takes a certain courage, and I commend you!
My workplace study-group (all full-time professional software and firmware engineers) recently brainstormed a book list. We found there was great overlap when we each listed the books that had had the biggest influence on each of us.
I'll paste a relevant excerpt here.
I'd like to explicitly note: some of the books from 10+ years ago are still extremely relevant! Don't automatically discount any of these due to publication date alone.
For the C++ language specifically, please choose from this other list: https://stackoverflow.com/questions/388242/the-definitive-c-book-guide-and-list
For widely-applicable software craft advice:
(2004) Head First Design Patterns
(2004) An Introduction to GCC <--- excellent for understanding how code turns into libraries and executables (whether or not you use GCC. the principles hold even on Windows in Visual Studio)
(2005) Effective C++ (definitely get the 3rd edition)
(2008) Clean Code
(2009) The Passionate Programmer
(2014) Effective Modern C++
www.219design.com
Software | Electrical | Mechanical | Product Design -
The simplest explanation of scope I've seen for students is that a set of { ... } curly braces in C++ are like Las Vegas. What happens in curly braces stays in curly braces!
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@J-Hilk I know that I am weak with basics. I was kind of forced to jump right into practice, so now it hurts badly a lot of times (lack of basic knowledge, I mean). Maybe you have any recommendations on sources of info? Something like a clear study plan (maybe a book, or course of lectures). Or maybe there was a post here on this topic? I'll be grateful to hear any recommendations from you (:
@ddryomyss said in Issues with getter and setter methods:
@J-Hilk I know that I am weak with basics. I was kind of forced to jump right into practice, so now it hurts badly a lot of times (lack of basic knowledge, I mean).
Don't worry, I started in a very similar fashion myself, I can relate.
As long as you're hopeful, polite and most importantly willing to improve yourself, I'm sure no-one here will refuse to aide you!Maybe you have any recommendations on sources of info? Something like a clear study plan (maybe a book, or course of lectures). Or maybe there was a post here on this topic? I'll be grateful to hear any recommendations from you (:
Well, I can only tell you from my personal experience.
I learn the more from videos than from books. So I've a couple of YT channels, that I follow that over the years published a hand full of tutorials:I can recommend the following:
The Cherno:
https://www.youtube.com/c/TheChernoProjecthe's a previous (c++)Game Developer and has a playlist about the basics (still ongoing) an OpenGL tutorial playlist and a GameEngine developer playlist.
So it varies between beginner level entry and advanced, pick your poison carefullyVoidRealms:
https://www.youtube.com/user/VoidRealmsHe's also a (somewhat) active forum member, he was one of my first Qt related sources for me.
Also has introductions to C++ and other Languages, and last I heard he has udemy courses to offer (never checked them out myself!)Cᐩᐩ Weekly:
https://www.youtube.com/user/lefticus1For more advanced stuff and oddities in c++, :D
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If I may be so bold as to suddenly insert myself...
@ddryomyss It is refreshing and heartening to see you acknowledge your weaknesses. That takes a certain courage, and I commend you!
My workplace study-group (all full-time professional software and firmware engineers) recently brainstormed a book list. We found there was great overlap when we each listed the books that had had the biggest influence on each of us.
I'll paste a relevant excerpt here.
I'd like to explicitly note: some of the books from 10+ years ago are still extremely relevant! Don't automatically discount any of these due to publication date alone.
For the C++ language specifically, please choose from this other list: https://stackoverflow.com/questions/388242/the-definitive-c-book-guide-and-list
For widely-applicable software craft advice:
(2004) Head First Design Patterns
(2004) An Introduction to GCC <--- excellent for understanding how code turns into libraries and executables (whether or not you use GCC. the principles hold even on Windows in Visual Studio)
(2005) Effective C++ (definitely get the 3rd edition)
(2008) Clean Code
(2009) The Passionate Programmer
(2014) Effective Modern C++
@KH-219Design @J-Hilk I'm truly amazed by your willingness to share your experience with me! I'll try to make maximum use of your recommendations as soon as I can, huuuge thank you (:
