How to see disabled button disabled when re run the program

I created so much qpushbutton to represent the seat in the cinema. After user buy the seats I made these seats disabled. all I want to do is to see previously disabled button disabled. I saved this disabled button 开发者_如何转开发to a txt file and read their name but I could not assign it as my widget Qpushbuttons. Is there a way to solve it?

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This is not as much a button issue as it is a data structure issue. You should somehow connect your buttons/seats to a data structure which aids in the bookkeeping of available and reserved seats. Once you close the program, you write out the data to a file or database, which you can subsequently read again when you open your application. You can then disable the buttons again of those seats which are reserved.

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I've made some quick example with Qt, I hope this will help you:

// list of all seats in order (true means seat is taken, false seat is still free)
QList<bool> seats;

// set some test values
seats.append(true);
seats.append(true);
seats.append(false);
seats.append(true);

// file where the seats will be stored
QFile file("seats.dat");

// save to file
file.open(QIODevice::WriteOnly);
QDataStream out(&file);
out << seats;
file.close();

// remove all seats (just for testing)
seats.clear();

// read from file
file.open(QIODevice::ReadOnly);
QDataStream in(&file);
in >> seats;
file.close();

// simple debug output off all seats
qDebug() << seats;

// you could set the buttons enabled state like this
QList<QPushButton*> buttons; // list of your buttons in the same order as the seat list of course
for (int i = 0; i < seats.count(); ++i)
    buttons[i]->setEnabled(!seats.at(i)); // disables all seats which are already taken

This is off course just a simple solution using a QDataStream to serialize the complete List of seats, but you can play around with this if you are new to Qt/C++