Retrieve value from a signal with the new Qt5 connect syntax

kevina67

Hi everybody,

I'm writing a simple code editor using Qt5 and its new signals & slots syntax. However I got stucked with a trivial problem.

Considering the following class:

@
class CodeEditorTabWidget : public QTabWidget
{
Q_OBJECT

public:

explicit CodeEditor(QWidget* parent = nullptr);

signals:

void currentChanged(const QString& fileName);

private:

// Some stuff

};
@

The currentChanged signal is emited when the file bein edited has changed. This widget is embedded in a subclass of QMainWindow called MainWindow.

In this class I'd like to do something like:

@
QObject::connect(_codeEditorTabWidget, &CodeEditorTabWidget::currentChanged, [this] () {
setWindowTitle("My editor - " + here the QString emited by currentChanged signal);
});@

So my window will have as title: "My editor - /home/kevina/myClass.hpp". And it will change automatically when the user open a new file or switch to another tab.

Is there any way to do so ?

Thanks in advance for any help ;)

andre

Couldn't you use this:
@
QObject::connect(_codeEditorTabWidget, &CodeEditorTabWidget::currentChanged, [=](const QString& fileName){
setWindowTitle(QString("My editor - %1").arg(fileName);
});
@

kevina67

It works, thank you. ;)