Qt: QT rounded corner window with anti-aliasing: irregular window

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It is not difficult to implement this function in QT: 1. Using Photoshop to make irregular window effects, or using the anti-sawtooth function to draw the background on the widget is a normal drawing. 2. Create a widget in the main window and set its

window->setWindowFlags(Qt::FramelessWindowHint);

Window-> setattribute (QT: wa_translucentbackground );
// ***** This is very important. *** 3. Move the mouse over the widget to move the window or change the size of the widget. cpp.

#include<QtGui/QPainter>

Widget::Widget(QWidget*parent): QWidget(parent), ui(newUi::Widget){
     ui->setupUi(this);
     pixmap.load("bg.png");
}
voidWidget::paintEvent(QPaintEvent*){
     QPainterpainter(this);
Painter. drawpixmap (, pixmap. Scaled (this-> size (), QT: ignoreaspectratio, QT: smoothtransformation); // draw an irregular background
}
Main. cpp implementation
intmain(intargc,char*argv[]){
     QApplicationa(argc,argv);
     QWidget*window=newQWidget();
     QGridLayout*layout=newQGridLayout();
     Widget*w=newWidget();
     layout->addWidget(w);
     window->setLayout(layout);
     window->setWindowFlags(Qt::FramelessWindowHint);
     window->setAttribute(Qt::WA_TranslucentBackground);
     window->show();
     returna.exec();
}