Qt apps - add to existing text

This is a discussion on Qt apps - add to existing text within the C++ Programming forums, part of the General Programming Boards category; I have just started Qt widget programming. Part of my first program looks like this Code: void MainWindow::numberChanged(){ int numOne=ui->numberOne->text().toInt(); ...

  1. #1
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    Qt apps - add to existing text

    I have just started Qt widget programming. Part of my first program looks like this

    Code:
    void MainWindow::numberChanged(){
        int numOne=ui->numberOne->text().toInt();
        int numTwo=ui->numberTwo->text().toInt();
        int addition=numOne+numTwo;
        ui->textEdit->setText(QString::number(addition));
    }
    This void is triggered by a pushbutton. For the line in bold, I want it to ADD to what is already there instead of replacing each time the button is pressed (like the VB textbox1.text=textbox1.text+variable). Oh, and if I just have to read some manual, point one out please. Preferrably on the net.

    Not much of a program in itself, but would be useful to know for larger programs.

  2. #2
    and the Hat of Guessing tabstop's Avatar
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    Why not use +=?

    Qt 4.7: QString Class Reference

    (EDIT: I'm assuming textEdit is a QString, but I have to admit I don't know enough Qt to know whether it really is.)

  3. #3
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    Thanks. textEdit is the name of the textfield being used (multiline instead of just one line). It was the default and I didn't bother changing it as its only a practise program for things like calculators, stack etc.

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