Unsolved i cannot check my QPushbutton that is in my qtableview
QPushButton* H11 = new QPushButton("H1"); ui->H11->setCheckable(true);
H11is a local variable.
ui->H11is something else. How are they the same button?
@JonB oh wow thank you, i didnt realize this. i indeed had a button that was also named H11 in my interface and that's why it was misleading.
so now that i have changed ui->H11 to H11 in my code i see that my button is being checked but the code in the connect does not run
but the code in the connect does not run
Use the new Qt5 connect syntax (without SGINAL/SLOT macros) to make sure the connect actually succeeded.
Show your code now.
here's the code of my connect :
@jsulm , this doesnt seem to work : Qt says that clicked() is an undeclared identifier when i take off SIGNAL/SLOT
my code now runs but only with the last button of the row.i suppose it's because the connect keeps assigning to the next button as the loop goes forward. is there a way to assign the connect() to each button on the loop ?
Qt says that clicked() is an undeclared identifier when i take off SIGNAL/SLOT
You have to read and act on https://wiki.qt.io/New_Signal_Slot_Syntax.
here's the code of my connect
You show no
connect()statement. You show your proposed slot code instead.
@JonB sorry, here's my connect() :
thank you, i'm going to read this
Earlier I only see:
index = m_table_space_pos->index(1,1,QModelIndex());
I do not see where you are creating
QPushButtons in a loop, putting each one into the table, and connecting each one to the slot. I see you only addressing
(1, 1)in the table.
Further, the slot only looks at one
H11variable. I do not know how that
H11relates to each of the push buttons you created.
If you seem to intend
AntArrayDialog::on_H11_clicked()slot to handle any of the buttons pressed (
connect()ed to each one), it is going to need to know which button was clicked. And that will require you to use a C++ lambda for the connection, to pass which button was clicked as a parameter to the slot....
Start by just verifying your slot gets called for any button clicked, not just one button....
@JonB my bad i hadnt updated my code at the time because i was doing tests to see if it was working for one button but i replaced (1,1) with (1,i) so i indeed have a row of buttons.
my slot gets called for the last button that is in the row of my TableView
i'm going to see about the C++ lambda you're talking about, it might be the solution i was looking for
so C++ lambda might be the way to relate to each of the QPushButtons i created with my loop ?
You will need the lambda when you are ready to have the single slot code method handle the clicking of any of the push buttons, which I suspect is what you will want to achieve.
However, before you do that, put a
qDebug() << "clicked"in as the first statement in the slot. Verify that gets called when any of the buttons you created are clicked, not just one button. Only at that point are you ready to move to a lambda for the slot which will pass which button was pressed as a parameter to the slot....
@JonB okay, the slot gets called of any of the buttons i have created, i have the "clicked" output on each of the buttons
And have you used the new style syntax I referred you to earlier? Show your
@JonB i dont think i got it right.. the IDE still says that clicked() is an undeclared identifier..
@JonB no i did check this in order to do the new connect statement but i dont get how am i supposed to write this with what is written on this page
@aftalib Please post text not screen shots.
connect(H11, &QPushButton::clicked, this, &WHAT_EVER_THIS_TYPE_IS::on_H11_clicked);
The very first section there shows an example of changing from
connect( sender, SIGNAL( valueChanged( QString, QString ) ), receiver, SLOT( updateValue( QString ) ) );
connect( sender, &Sender::valueChanged, receiver, &Receiver::updateValue );
The code you have pasted does not attempt to follow that required pattern.
okay thats my bad i didnt quite understand the syntax that was written in the new connect statement but i think i got it now, thank you. here's what i wrote :
i dont get any errors and the program launches well
then i have to use lambda with this syntax in order for my slot to work with any of the buttons i created right?