subclass qpushbutton

[ChrisW67]

However, I get 'no matching function for call to char[]' errors on code that calls them like this: okButton = new Button("Ok");
How is this done, it should convert the char[] somehow to const QString?

Your class expects a QString and is being given a const char*. The compiler will try to find a QString constructor accepting a const char*, a conversion constructor, and construct a QString on your behalf. If there is no such constructor then your code generates an error like the one you describe. If your program is being built with QT_NO_CAST_FROM_ASCII defined then QString interfaces accepting C string literals are disabled and you need to explicitly do something like this:

Button b(QLatin1String("coffee"));
//or
Button b(QString::fromUtf8("кофе"));

Button b(QLatin1String("coffee"));
//or
Button b(QString::fromUtf8("кофе"));

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[Cremers]

Thanks for the help people.
I'm still not there.

In it's simplest form I try to make a subclass following Blubbz0r's advice:

header:
//--------------------------------------
class Button : public QPushButton
{
Q_OBJECT
public:
 Button::Button(const QString & text, QWidget * parent = 0 );
};
 
cpp:
/*------------------------------------------------------------------------------------*/
Button::Button(const QString & text, QWidget * parent)  : QPushButton(text, parent)
{
this->setText(text);
}

header:
//--------------------------------------
class Button : public QPushButton
{
Q_OBJECT
public:
 Button::Button(const QString & text, QWidget * parent = 0 );
};

cpp:
/*------------------------------------------------------------------------------------*/
Button::Button(const QString & text, QWidget * parent)  : QPushButton(text, parent)
{
this->setText(text);
}

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But I get an error, extra qualification on member Button.

I didn't even bother about the part about accepting char[] yet.

Could someone please just write out this little piece of code correctly for me, I learn best by by staring at correct syntax.
Thanks.

[anda_skoa]

But I get an error, extra qualification on member Button.

You have Button::Button in your header inside class Button, but the constructor name should only be the class name

class Button : public QPushButton
{
Q_OBJECT
public:
 Button(const QString & text, QWidget * parent = 0 );
};

class Button : public QPushButton
{
Q_OBJECT
public:
 Button(const QString & text, QWidget * parent = 0 );
};

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Cheers,
_

[Cremers]

Thanks, I got my subclass. For other qt newbies:

header:
//--------------------------------------
class Button : public QPushButton
{
Q_OBJECT
public:
 Button(const QString & text, QWidget * parent = 0 );
};
 
cpp:
/*------------------------------------------------------------------------------------*/
Button::Button(const QString & text, QWidget * parent)  : QPushButton(text, parent)
{
this->setText(text);
}

header:
//--------------------------------------
class Button : public QPushButton
{
Q_OBJECT
public:
 Button(const QString & text, QWidget * parent = 0 );
};

cpp:
/*------------------------------------------------------------------------------------*/
Button::Button(const QString & text, QWidget * parent)  : QPushButton(text, parent)
{
this->setText(text);
}

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Now even new Button("Ok") works without errors, no complaints about char[] conversion.

[ChrisW67]

For other qt newbies

This is a C++ newbies issue, nothing to do with Qt.