Sending struct to QDialog

RainyDays

Hello!

If i want to move data from QMainWindow and a QDialog. Is it possible to do this with a struct?

The purpose for it is to set values and enable or disable visibility on items in the QDialog depending on the data loaded in the QMainWindow.

Christian Ehrlicher

@RainyDays said in Sending struct to QDialog:

Is it possible to do this with a struct?

Yes, it is because Qt is just a c++ library.

RainyDays

How would the setup be?

I define a struct in both the MainWindow and the Dialog.

typedef struct
    {
        bool Condition1;        
        bool Condition2;        
        bool Condition3;
        QString String1;
        QString String2;
        QString String3;
}
DialogStruct;

Q_DECLARE_METATYPE(DialogStruct);

Then create one empty

    Struct DialogStruct;

Fill it with data

DataToDialog.String1 = "";
DataToDialog.String2 = "";
DataToDialog.String3 = "";
DataToDialog.Condition1 = true;
DataToDialog.Condition2 = true;
DataToDialog.Condition3 = true;

Then i want to send

DataToDialog

To the dialogs struct. How do i do this?

SGaist

Hi,

One possibility:

MyDialog myDialog;
myDialog.setStructure(myStructure);
myDialog.exec();

A different one:

MyDialog myDialog(myStructure);
myDialog.exec();

RainyDays

@SGaist said in Sending struct to QDialog:

Hi,

One possibility:

MyDialog myDialog;
myDialog.setStructure(myStructure);
myDialog.exec();

A different one:

MyDialog myDialog(myStructure);
myDialog.exec();

I seem to be able to create them in Main and Dialog. Also use them to point data to their contents but it complains when i want to point the data towards the dialog?

Christian Ehrlicher

@RainyDays said in Sending struct to QDialog:

but it complains when i want to point the data towards the dialog?

What does this mean?

RainyDays

@Christian-Ehrlicher said in Sending struct to QDialog:

@RainyDays said in Sending struct to QDialog:

but it complains when i want to point the data towards the dialog?

What does this mean?

"No viable conversion from Mainstruct to Dialogstruct"

Where Mainstruct is a struct in the MainWindow and Dialogstruct is a struct in the DialogWindow.

Both are set up like this

typedef struct
    {
        bool Condition1;        
        bool Condition2;        
        bool Condition3;
        QString String1;
        QString String2;
        QString String3;
}

Christian Ehrlicher

@RainyDays said in Sending struct to QDialog:

Both are set up like this

Which is wrong - you need one struct definition.

You really should start with the basics of c(++) before fiddling around with Qt.

RainyDays

@Christian-Ehrlicher

Informative, well chosen.
I hear QT is a mysterious device that could be dangerous for those who have not chosen the right path from the beginning.
Thanks for the warning :)

Christian Ehrlicher

@RainyDays said in Sending struct to QDialog:

I hear QT is a mysterious device that could be dangerous for those who have not chosen the right path from the beginning.

If you think... but i only said that at least basic c++ knowledge is needed since Qt is a c++ library.

RainyDays

@Christian-Ehrlicher
The first time is always the hardest time and for me this was too many years ago :)
Takes a while to get the engine running again!
But why stop when you reach an obstacle? Just ask for a friendly helping hand?

I´m really sure though i need to define the structs in each of the header files.
Otherwise the dialog does not know what it´s struct is...right?

SGaist

One single definition.

Put that in a different header that both can include.

RainyDays

@SGaist

Ok, so any change in the struct will affect both with no mismatch of data?

SGaist

That's the goal: one single source of truth.

JonB

@SGaist
I didn't realize C structs could have religious overtones ;-)

RainyDays

@JonB
It does, in PLC programming it stands for order in chaos.
A minimalistic well sorted complex data structure applicable to many objects with the same type of in and outputs.

RainyDays

@SGaist

It works now by the way :)
Thanks for hanging around!