Qt实现左右滑动切换图片（可在开发板上滑动切换）

#include "pictest.h"
#include "ui_pictest.h"
#include "qevent.h"
#include <QDebug>

Pictest::Pictest(QWidget *parent) :
QDialog(parent),
ui(new Ui::Pictest)
{
ui->setupUi(this);
this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowSystemMenuHint | Qt::WindowMinimizeButtonHint); //出去窗体边框
this->setStyleSheet(QString("background-image: url(:/%1.png);").arg(2)); //显示一张图片
this->installEventFilter(this); //设置点击事件
}

Pictest::~Pictest()
{
delete ui;
}

//点击事件函数
bool Pictest::eventFilter(QObject *watch, QEvent *evn)
{

static int press_x; //点击鼠标时获取的横坐标x
static int press_y; //点击鼠标时获取的纵坐标y
static int relea_x; //松开鼠标时获取的横坐标x
static int relea_y; //松开鼠标时获取的纵坐标y

QMouseEvent *event = static_cast<QMouseEvent *>(evn); //将图片QT QEvent 转换为 QMouseEvent ,QKeyEvent....等子类
//获取点击鼠标（手指）时的坐标
if (event->type() == QEvent::MouseButtonPress)
{
press_x = event->globalX();
press_y = event->globalY();
}
//获取松开鼠标（手指）时的坐标
if(event->type() == QEvent::MouseButtonRelease)
{
relea_x = event->globalX();
relea_y = event->globalY();
}
//对鼠标（手指）滑动的方向进行判断(右滑)
if((relea_x - press_x) > 5 && event->type() == QEvent::MouseButtonRelease && qAbs(relea_y - press_y) < 50)
{
if (index == 5) {
index = 2;
} else {
index++;
}
this->setStyleSheet(QString("background-image: url(:/%1.png);").arg(index)); //切换图片
}
//对鼠标（手指）滑动的方向进行判断(左滑)
if((press_x - relea_x) > 5 && event->type() == QEvent::MouseButtonRelease && qAbs(relea_y - press_y) < 50)
{
if(index == 2)
{
index = 5;
}
else
{
index--;
}
this->setStyleSheet(QString("background-image: url(:/%1.png);").arg(index)); //切换图片
}

return QWidget::eventFilter(watch, evn);
}