1、概述
源码放在文章末尾
可以在窗体中点击鼠标左键进行图片切换，项目提供了一些图片素材，整体风格偏向于3D类型，也可以根据需求自己放置不同的图片。
下面是demo演示：
项目部分代码如下所示：
头文件部分：
#ifndef WIDGET_H
#define WIDGET_H#include <QWidget>namespace Ui {
class Widget;
}class Widget : public QWidget
{Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();protected:bool eventFilter(QObject *watched, QEvent *evt);private:Ui::Widget *ui;
};#endif // WIDGET_H逻辑实现部分：
#include "widget.h"
#include "ui_widget.h"
#include "qevent.h"
#include "qdebug.h"Widget::Widget(QWidget *parent) : QWidget(parent), ui(new Ui::Widget)
{ui->setupUi(this);this->setAttribute(Qt::WA_TranslucentBackground);this->setWindowFlags(Qt::FramelessWindowHint | Qt::WindowSystemMenuHint | Qt::WindowMinimizeButtonHint);ui->widget->installEventFilter(this);ui->widget->setStyleSheet(QString("background-image:url(:/image/%1.png);").arg(1));
}Widget::~Widget()
{delete ui;
}bool Widget::eventFilter(QObject *watched, QEvent *evt)
{static int index = 1;static QPoint mousePoint;static bool mousePressed = false;QMouseEvent *event = static_cast<QMouseEvent *>(evt);if (event->type() == QEvent::MouseButtonPress) {if (event->button() == Qt::LeftButton) {mousePressed = true;mousePoint = event->globalPos() - this->pos();if (index == 5) {index = 1;} else {index++;}ui->widget->setStyleSheet(QString("background-image:url(:/image/%1.png);").arg(index));return true;} else {exit(0);}} else if (event->type() == QEvent::MouseButtonRelease) {mousePressed = false;return true;} else if (event->type() == QEvent::MouseMove) {if (mousePressed && (event->buttons() && Qt::LeftButton)) {this->move(event->globalPos() - mousePoint);return true;}}return QWidget::eventFilter(watched, event);
}
