Questions tagged [qt-slot]
53 questions
0
votes
1 answer
Connect slots from another class not working in Qt
I have this class in button.h:
class Buttons : public QObject
{
Q_OBJECT
public:
Buttons();
QVector buttons;
public slots:
void getBtnInfo();
};
and in mainwindow.cpp, I connect like this:
Buttons mButtons;
for(int i =…
Theodore Tang
- 831
- 2
- 21
- 42
0
votes
1 answer
Qt 5.9 slot naming bug
I'm using Qt 5.9.
I've a problem declaring slots with underscore style in particular when I name it with more then 2 underscores.For example with a void on_stop_treatment() slot, even I don't make a connection, I get QMetaObject::connectSlotsByName:…
Antonio Del Sannio
- 195
- 2
- 17
0
votes
1 answer
Qt signal/slots and C++ Lambda expression
Why this doesn't work ?
Class inherit from QObject
b is Class child.
bar is Foo child.
void Class::method(Foo& b) {
Bar* bar = b.getBar();
QObject::connect(bar, &Bar::s1, [&]{
auto x = bar->x(); // this line throw an exception read…
Houss_gc
- 727
- 5
- 27
0
votes
2 answers
How to connect signal and slot without using connect function?
Is there a way to connect signal and slot without using connect function?
If a way exists, please give some examples.
lens
- 133
- 1
- 11
0
votes
1 answer
Slots and signals in Qt C++ in QTcpServer app
There is a question about slots and signals in Qt C++ in QTcpServer app. I am not very familiar with slots and signals approach. So ...the issue is slots for client socket on server app is not being invoked at all. I think that I use connect…
Дмитрий Сидельников
- 35
- 4
0
votes
0 answers
Pass signals and data from a class to another on Qt
I will post the code first as it will be easier to understand after that.
Basically, I have a default class, MainWindow:
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include
#include
#include…
caffeine
- 435
- 7
- 26
0
votes
1 answer
QT Connect QNetworkReply SIGNAL finished() not firing
I had a look at this link and except the signal spy and debugging i tried at least everything. I took the example from this site. I haven't set up the debugger for now.
My problem is that i want to fire a custom slot and nothing is happening.
I…
Eggi
- 170
- 1
- 15
-2
votes
1 answer
Display data real time in QT c++ from db
Sth like this
The project has a page with this schema:
There is a QlineEdit in integer and a texBox(or can be use another widget)
I want to Display the relevant cell of database(sqlite with query for example:select * frome dbName where…
erfnemati
- 3
- 4