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 <QWidget>class ShapeWidget : public QWidget
{Q_OBJECTpublic: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 <QMouseEvent>
#include <QPainter>
#include <QPixmap>
#include <QBitmap>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()
{