@KillerSmath said in Qt signal-slot duplication code avoidance:

@vernes
One point i would like to talk about here.
The Software engineering warns to use the minimum coupling while maximize the cohesion of class.

Note: Inheritance is a 2 edged weapon, reusability is good but dependence is bad.

If you decide to modify a class with a high dependency level, it can break the logic of some dependent class and it can be recursive.

Good point here. However I would say that the approach I'm describing is much better compared to a lot of copy & paste.

I'd avoid use inheritance but unfortunately Qt seems encouraging it.

Problem is Qt and templates do not work well together, and many things like CRTP are not possible in many cases.

@Devopia53 said in How to use animate SVG and Overlap:

@RiceBall

If you do not specify a selector when using a stylesheet, the properties of the child widget may also be affected. Specifying a selector resolves this. like this:

QMainWindow { background-color: rgb(0, 0, 0); }

Sorry , now I meet a new problem .
When I use tab Widget, and I want one screen is shown SVG Widget.
But it looks like at Main Screen not at tab widget.
What is wrong ?

https://drive.google.com/open?id=1grsT0nF37w7dRHn_rXN4Dxdcb-WSj3hR

0_1556899252503_final result.gif

Hi @convexbytes !

This is something I do... a lot. However, I break my project into libraries (both shared and static) and use common names all the time. I have not had problems so far.

Now, what I do have problems with is QtCreate can get confused sometime on the correct file to reference in the debugger and code completion. This is much better in 4.9 if I am patient and wait a moment.

My typical usage is in plugins. I am a creature of habit. My plugin main interface is typically called PluginMain. Resides in PluginMain.cpp/PluginMain.h. May or may not reside in different namespaces. I have never had a problem building my projects.

The MOC generator typically uses the namespace in the name mangling. Here is a small sample (my namespace in this case is 'i3k'):
/****************************************************************************
** Meta object code from reading C++ file 'PositionView.h'
**
** Created by: The Qt Meta Object Compiler version 67 (Qt 5.12.3)
**
** WARNING! All changes made in this file will be lost!
*****************************************************************************/

#include "../../../../../src/display/PositionView.h"
#include <QtCore/qbytearray.h>
#include <QtCore/qmetatype.h>
#if !defined(Q_MOC_OUTPUT_REVISION)
#error "The header file 'PositionView.h' doesn't include <QObject>."
#elif Q_MOC_OUTPUT_REVISION != 67
#error "This file was generated using the moc from 5.12.3. It"
#error "cannot be used with the include files from this version of Qt."
#error "(The moc has changed too much.)"
#endif

QT_BEGIN_MOC_NAMESPACE
QT_WARNING_PUSH
QT_WARNING_DISABLE_DEPRECATED
struct qt_meta_stringdata_i3k__PositionView_t {
QByteArrayData data[8];
char stringdata0[82];
};
#define QT_MOC_LITERAL(idx, ofs, len)
Q_STATIC_BYTE_ARRAY_DATA_HEADER_INITIALIZER_WITH_OFFSET(len,
qptrdiff(offsetof(qt_meta_stringdata_i3k__PositionView_t, stringdata0) + ofs
- idx * sizeof(QByteArrayData))
)
static const qt_meta_stringdata_i3k__PositionView_t qt_meta_stringdata_i3k__PositionView = {
{
QT_MOC_LITERAL(0, 0, 17), // "i3k::PositionView"
QT_MOC_LITERAL(1, 18, 11), // "on_postData"
QT_MOC_LITERAL(2, 30, 0), // ""
QT_MOC_LITERAL(3, 31, 8), // "PRawGNSS"
QT_MOC_LITERAL(4, 40, 3), // "gps"
QT_MOC_LITERAL(5, 44, 9), // "PPosition"
QT_MOC_LITERAL(6, 54, 8), // "position"
QT_MOC_LITERAL(7, 63, 18) // "on_settingsChanged"

}, "i3k::PositionView\0on_postData\0\0PRawGNSS\0" "gps\0PPosition\0position\0on_settingsChanged"

};
#undef QT_MOC_LITERAL

@sierdzio said in Q_SLOTS, Q_SIGNALS or slots, signals ?:

ave to go wi

@Dariusz

I just always use Q_SLOTS/Q_SIGNALS and Q_EMIT. This is easy to see in code and easy to search for in an IDE. I find after all my years I am about the future development and others being able to quickly glean information from looking at the code as to what is compiler and what is extra-ordinary.

@VRonin
Hmm, food for thought, thank you.

Because there's no reason for it to be mentioned in the documentation. You have to clone the module sources and switch that branch.

Anyone can contribute to the documentation, the code, etc. You have to follow the procedures and rules but it's not some walled garden.

@TahaLotfi
Hi
it already uses doubles.
so that should also work for float type.

Hi
Ok, that is actually just the Editor version. (and the Qt it was build with)
It can use multiple Qt version.
I assume you use Qt5.12. You can see it in the Projects what kit you are using and hence Qt version.

In any case, if the code was for 4.8.
You will need to fix some of includes names for Qt and maybe some other stuff more to get
it to compile. Some Qt things changed from 4.8 to 5.12 so you might need to port some stuff.

hi @Pada_
set the border to 0 (or none) and use the padding or margin attributes to position the text away from the border

@legitnameyo

QString str = textEdit->toPlainText(); QString targetChars = str.mid(textEdit->textCursor().columnNumber() -2 ,2); qDebug() <<targetChars;

Your current program:
source model -> QSortFilterProxyModel with "A | [^ (B)]" as filter ->view

what we are suggesting:
source model -> QSortFilterProxyModel with "A" as filter -> NegativeSortFilterProxyModel with "B" as a filter ->view

ok I ll try that..

It was because I had set Qt::WA_PaintOnScreen on my widget. Removing that fixed the problem.

@raven-worx I feel so stupid right now. The third slash was the problem. Thank you very much.

Hi and welcome to devnet,

I've created a new thread for your question as it was unrelated to the one you posted to.

As for your question:

What version of PySide2 are you using ?
How did you install it ?
What version of macOS are you running ?

I have looked at more of the example to run, I discovered that if I pair my phone to my laptop the QML low energy scan example will run and "discover" my phone however, when I run the Bluetooth Low Energy Scanner example it does not discover my device, with my phone being paired to my laptop and then also not having it paired to my laptop. Is there a reason why?

You can read them apparently:
https://forum.qt.io/topic/85670/how-to-load-an-stl-file-using-qmesh/5

How do you save a screenshot of a Qt3DWindow?

@Caique-Moura said in Create a new plugin cMake:

I used the command add_subdirectory(folder´s name) on CMakeList.txt, but I still got some erros and the code does not work

what are you actually trying to do with that command?
add_subdirectory() expects a path to a folder which again contains a CMakeList.txt file. This CMakeLists.txt is then processed with a separate context.