Please help me with easy problems. How to connect(//)

[arnolddumas]

Ok, now I see your problem :

@
OboiCalc::OboiCalc(QWidget* parent) : QWidget(parent)
{
connect(error, SIGNAL(isVisible(bool)), this, SLOT(setDisabled(bool)));
}
@

error should be a pointer to a QDialog.

@
class OboiCalc : public QWidget
{
private :

QDialog* error;

}
@

This should work fine now

[freelife]

but I use here "&", as in another connects, which work very well.
@connect(error.pushButton, SIGNAL(clicked()), &error, SLOT(hide()));
connect(error.pushButton_2, SIGNAL(clicked()), &error, SLOT(hide ()));@
It is compiled, but SLOT(setDisabled) of OboiCalc doesn't work.

[freelife]

I made error as a pointer to a QDialog and added -> to all methods, but program exited with code -1073741819.

[SetBetterPass]

Which slot doesn't work?
You should put something like qDebug()<<"in slot"; at first line of slot (don't forget include QDebug) to see if the problem is with connect or in slot code, if you won't get "in slot" in application output after you call slot the problem is with connecting. Try it and if you won't find the problem by yourself post code.
And to your error, have you created the object? Add this line to your code if not: @ error=new QDialog(this);@ where you need to create the dialog.

[freelife]

"This is sourse":https://docviewer.yandex.ru/?url=ya-disk:///disk/Oboi.rar&name=Oboi.rar&c=5156c2610790
click at" Скачать оригинал " on the top.
Then if you click at first button("Счет") the window chould setDisable, but it shouldn't. This is problem.

[SetBetterPass]

please post your code here(just the part with issue), I can't speak/read Russian well and it wants me to log in to see the code, I am not going to create account^^

[freelife]

Sorry I did't know, what you must have accaunt to download)
Look at calc.cpp.
@//calc.h
#ifndef CALC_H
#define CALC_H
#include <QDialog>
#include "ui_OboiCalc.h"
#include <Error.h>

class OboiCalc : public QWidget, public Ui::OboiCalc
{
Q_OBJECT
public:
OboiCalc(QWidget *parent = 0);
private:
Error1 error;
protected slots:
void setValue();
void clearCalc();
};

#endif // CALC_H
@
@//Error.h
#ifndef ERROR_H
#define ERROR_H
#include <QDialog>
#include "ui_Error1.h"

class Error1 : public QDialog, public Ui::Error1
{
Q_OBJECT
public:
Error1(QWidget parent = 0);
};
#endif // ERROR_H
@
@//calc.cpp
#include <QtGui>
#include "Calc.h"
#include <Error.h>
OboiCalc::OboiCalc(QWidget parent):QWidget(parent)
{
setupUi(this);
spinBox2_3->setDisabled(true);
//**********************************
connect(&error, SIGNAL(isVisible(bool)), this, SLOT(setDisabled(bool)));//This connect doesn't work =(
//************************************
connect(buttonOk, SIGNAL(clicked()), this, SLOT(setValue()));
connect(buttonClear, SIGNAL(clicked()), this, SLOT(clearCalc()));
connect(error.pushButton, SIGNAL(clicked()), &error, SLOT(hide()));
connect(error.pushButton_2, SIGNAL(clicked()), &error, SLOT(hide ()));
connect(error.pushButton_2, SIGNAL(clicked()), this, SLOT(clearCalc()));
connect(checkBox, SIGNAL(clicked(bool)), spinBox2_3, SLOT(setEnabled(bool)));

}
void OboiCalc::clearCalc()
{
//something
}
void OboiCalc::setValue()//вывод
{
//something
error.show();

}
@
@//error.cpp
#include <QtGui>
#include <Calc.h>
#include <Error.h>
Error1::Error1(QWidget *parent): QDialog(parent)
{
setupUi(this);

}
@

[SetBetterPass]

actually you haven't created object error so you cant connect it.
You should connect these 2 buttons in error.cpp in constructor, so from this:
@
connect(error.pushButton, SIGNAL(clicked()), &error, SLOT(hide()));
connect(error.pushButton_2, SIGNAL(clicked()), &error, SLOT(hide ()));
@
make this: @
Error1::Error1(QWidget *parent): QDialog(parent)
{
setupUi(this);
connect(pushButton, SIGNAL(clicked()), this, SLOT(hide()));
connect(pushButton_2, SIGNAL(clicked()), this, SLOT(hide ()));

}@
Don't forget create slots before debugging (at least empty) or you get errors.

and to connect these 2:
@
connect(error.pushButton_2, SIGNAL(clicked()), this, SLOT(clearCalc()));
connect(&error, SIGNAL(isVisible(bool)), this, SLOT(setDisabled(bool)));
@
you have to have created object:
@
//in constructor or somewhere:
connect(something,SIGNAL(someSignal()),this,SLOT(errorMessage()));
@
make slot that creates error message
@
void OboiCalc::errorMessage(){
Error1* error = new Error1(this);
connect(error->pushButton_2, SIGNAL(clicked()), this, SLOT(clearCalc()));
connect(error, SIGNAL(isVisible(bool)), this, SLOT(setDisabled(bool)));
error->show();
}
@

[freelife]

Thank you! I understood)

[SetBetterPass]

No problem, ask more if you there is something you need to help with, otherwise mark thread [Solved] (edit post and add [Solved] to title). :)