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Twitter has introduced an optional feature that lets you receive direct messages from anyone, even users you dont follow or who dont follow you.

Luckily the "feature" is off by default - you can turn it on in the settings menu.

The feature is accompanied by a new "Messages" button in the iOS and Android Twitter apps as well.

Twitter first opened your inbox to direct messages from anyone in 2013, but it quickly eliminated the feature.

Now its returned, likely so the social network can try to stake a place in the burgeoning world of messaging apps - where Facebooks so-far successfulefforts have doubtless ruffled Twitters feathers.

In addition Twitter pointed out in a blog post that less restricted DMing will let users communicate more easily with businesses, something well all be able to agree on when we no longer have to follow Comcasts support account back just to yell at it privately.

But anyone who turns the feature on will open themselves up to private abuse from strangers to complement the public abuse many are already enduring - something Twitter still needs to address in a meaningful way, and hopefully soon.

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class MyWidget : public QMainWindow 
{ 
Q_OBJECT 
public: 
explicit MyWidget(QWidget *parent = 0); 

~MyWidget(); 
private: 
Ui::MyWidget *ui; 
}; 

MyWidget::MyWidget(QWidget *parent) 
: QWidget(parent)//ERROR 
{ 
QPushButton *quit = new QPushButton("Close Application", this); 

setGeometry(150,150,100,100); 
setFont(QFont("Times",12,QFont::Bold)); 

connect(quit,SIGNAL(clicked()),qApp,SLOT(quit())); 

Error: Type "QWidget" is not direct base of MyWidget.

you will need to pass the parent to the QMainWindow constructor

MyWidget::MyWidget(QWidget *parent) 

: QMainWindow(parent) // no ERROR 

you will need to pass the parent to the QMainWindow constructor:

If this even does not fix the issue then you may have forgot to include the header file in .h file

# include