Qt不规则可移动窗体的实现

实现：

        可以借助不规则的位图来实现不规则窗体，并支持拖动和移动。下面分别是头文件和源文件

#ifndef SHAPEWIDGET_H
#define SHAPEWIDGET_H
 
#include 
 
class ShapeWidget : public QWidget
{
    Q_OBJECT
    
public:
    ShapeWidget(QWidget *parent = 0);
    ~ShapeWidget();
protected:
    void mousePressEvent(QMouseEvent *);
    void mouseMoveEvent(QMouseEvent *);
    void paintEvent(QPaintEvent *);
private:
    QPoint dragPosition;
};
 
#endif // SHAPEWIDGET_H

#include "shapewidget.h"
#include 
#include 
#include 
#include 
 
ShapeWidget::ShapeWidget(QWidget *parent)
    : QWidget(parent)
{
    QPixmap pix;
    pix.load("16.png",0,Qt::AvoidDither|Qt::ThresholdDither|Qt::ThresholdAlphaDither);
    resize(pix.size());
    setMask(QBitmap(pix.mask()));
 
    setWindowFlag(Qt::FramelessWindowHint);
}
 
ShapeWidget::~ShapeWidget()
{
    
}
 
void ShapeWidget::mousePressEvent(QMouseEvent *event)
{
    if(event->button()==Qt::LeftButton)
    {
        dragPosition =event->globalPos()-frameGeometry().topLeft();
        event->accept();
    }
    if(event->button()==Qt::RightButton)
    {
        close();
    }
}
 
void ShapeWidget::mouseMoveEvent(QMouseEvent *event)
{
    if(event->buttons()&Qt::LeftButton)
    {
        move(event->globalPos()-dragPosition);
        event->accept();
    }
}
 
void ShapeWidget::paintEvent(QPaintEvent *event)
{
    QPainter painter(this);
    painter.drawPixmap(0,0,QPixmap("16.png"));
}