Access the UI, from multiple windows.

Loc888

@mrjj Thank you, i like exemples rly :)

Because this is the only thing can help at least when you rly dont know what to do. Tomorrow i will try in this way.

Loc888

I have few errors:

default argument missing for parameter 2 of 'Window1::Window1(QWidget*, Settings_Window*)'
explicit Window1(QWidget *parent = 0, Settings_Window *TheTrueOne)
^

redefinition of 'Window1::Window1(QWidget*, Settings_Window*)'
Window1::Window1(QWidget *parent, Settings_Window *TheTrueOne = 0) :
^

'Window1::Window1(QWidget*, Settings_Window*)' previously defined here
explicit Window1(QWidget *parent = 0, Settings_Window *TheTrueOne)
^

Can you correct it? Because i tried what i could, but doesn't help.

Window1.h

#ifndef WINDOW1_H
#define WINDOW1_H

#include <QWidget>
#include "Settings_Window.h"

namespace Ui {
class Window1;
}

class Window1 : public QWidget
{
    Q_OBJECT

    Settings_Window *GivenToMe;

public:
    explicit Window1(QWidget *parent = 0, Settings_Window *TheTrueOne)
{

    GivenToMe = TheTrueOne; // store the pointer for later

}


~Window1();

private:
Ui::Window1 *ui;
};

#endif // WINDOW1_H

And this is Window1.cpp

#include "window1.h"
#include "ui_window1.h"
#include "settings_window.h"

Window1::Window1(QWidget *parent, Settings_Window *TheTrueOne = 0) :
    QWidget(parent),
    ui(new Ui::Window1)
{
    ui->setupUi(this);
}

Window1::~Window1()
{
    delete ui;
}

SGaist

Hi,

Default arguments can only be set in the function declaration. So move all = 0 to the header.

As a matter of good practice, the parent parameter should always be last. Question of coherency with the Qt library and what other developers expects.

Loc888

@SGaist Ok, i try that.

Loc888

@SGaist I still have some errors the:

Error: redefinition of 'Window1::Window1(Settings_Window*, QWidget*)'
Window1::Window1(Settings_Window *TheTrueOne,QWidget *parent) : QWidget(parent),
^

SGaist

Do you have matching declaration and implementation ?

Loc888

@SGaist

Header :

    explicit Window1(Settings_Window *TheTrueOne = 0, QWidget *parent = 0)
    {

        GivenToMe = TheTrueOne;

    }

Source:

Window1::Window1(Settings_Window *TheTrueOne,QWidget *parent) :         
QWidget(parent),ui(new Ui::Window1)
{
ui->setupUi(this);
}

error: redefinition of 'Window1::Window1(Settings_Window*, QWidget*)'
Window1::Window1(Settings_Window *TheTrueOne,QWidget *parent) : QWidget(parent),ui(new Ui::Window1)
^

I i remove ther Settings_Window, then i have no type specified error.

SGaist

You wrote the method twice: once in the header and a second time in the implementation file. That's what the compilers is complaining about. You can have only one implementation.

Loc888

@SGaist Men, this stuff is default... I just add some extra parameters... What should i remove?

Ps. Ok, i fixed it.

Loc888

For the love of God, this stuff is not working, i lost my patience.

Loc888

Can someone create just any working example?? I want it to compile it, and see if it's gonna work.

jsulm

@Loc888 Come on it's simple. Just remove the method definition from the header file:

// Header :

explicit Window1(Settings_Window *TheTrueOne = 0, QWidget *parent = 0);

// Source:

Window1::Window1(Settings_Window *TheTrueOne,QWidget *parent) :         
    QWidget(parent),ui(new Ui::Window1),
    GivenToMe(TheTrueOne)
{
    ui->setupUi(this);
}

Some reading about C++ would help.

Loc888

@jsulm I fixed that issue.. I mean, when i change the checkBox in the other window, nothing change, and i try like 50 times and more, and same stuff, doesn't work,and i can't understand why.

My compiler is giving me around 50 warnings, when i create non-static data member, it is normal?

mrjj

@Loc888
Hi
Nope 50 warning is not normal.
What does warnings say ?

Also, if nothing happens. Are you sure u are not creating a second copy/instance ?

Loc888

@mrjj

mainwindow.h:41: Warning: non-static data member initializers only available with -std=c++11 or -std=gnu++11 [enabled by default]
Settings_Window* Settings_Widget = new Settings_Window;
^

Men, i don't know about that instance.....I send you a simple project, and if you want., you can take a look, i am really tired.

mrjj

@Loc888
Hi
It gives that warning if you do

class xxx : whatever {
int var =0;
}
and not using c++ 11

Do you have
Settings_Window* Settings_Widget = new Settings_Window;
in a. h file ?

Yes, please. zip project. upload to somewhere and send me link.

Loc888

@mrjj

http://www.mediafire.com/file/n9e0d3q02soc3z5/Test_3.rar

Yes, it's in .h file. Correct this stuff if you can, and try to compile, because i do a lot of tries, and i don't really know how it's looks like right now.

mrjj

@Loc888
Hi
Im not getting those warning.
While i look in project, you can try adding
CONFIG +=c++11
in the .pro file.
Delete all in build folder
and rebuild all

mrjj

Hi
You do create a brand new mainwindow. so
that is why you dont see the checked checkbox as that is in first copy

void Window1::on_Check_Button_clicked()
{

    MainWindow* W1 = new MainWindow; // not the first one, u open settings in..

    ui->lineEdit->setText("Is not checked.");

mrjj

Hi
Here is working project.
Main issue was you created a NEW mainwindow so
the setting_Widget was NOT the same as one where u checked checkbox..

https://www.dropbox.com/s/nhrr9qpv76d1r07/Test_3B.zip?dl=0

I fixed it to give window1 as parameter and use it that way.
(as described higher up)