c++学习之QT综合项目一

1.项目简介及创建

#include "bird.h"

Bird::Bird(QWidget *parent) : QWidget(parent)

{

    //加载所有图片

    for(int i = 0 ; i < this->max;i++)

    {

        QString str = QString(":/Bird/bird%1.png").arg(i+1);

        this->m_bird_Pix.load(str);

    }

    //设置鸟的大小

    this->setFixedSize(this->m_bird_Pix.width(),this->m_bird_Pix.height());

    //创建定时器

    this->timer = new QTimer(this);

    //监听定时器

    connect(timer,&QTimer::timeout,[=](){

        QString str = QString(":/Bird/bird%1.png").arg(this->min++);

        this->m_bird_Pix.load(str);

        if(this->min > this->max)

        {

            this->min = 1;

        }

        emit changePix(); //告诉窗口正在做切图

    });

    //创建菜单

    this->m_Menu = new QMenu();

    //监听菜单下的退出菜单项

    connect(this->m_Menu->addAction("退出"),&QAction::triggered,[=](){

        exit(0);

    });

}

void Bird::running()

{

    this->timer->start(70);

}

void Bird::mousePressEvent(QMouseEvent *event)

{

    this->m_Pos = event->globalPos() -   ((QWidget *) (this->parent()))->frameGeometry().topLeft();

    this->mouseDown = true; //鼠标按下，将状态改为true

    //右键菜单弹出

    if(event->button() == Qt::RightButton)

    {

        this->m_Menu->popup(QCursor::pos());

    }

    //窗口消失后 重置鼠标按下状态

    connect(this->m_Menu,&QMenu::aboutToHide,[=](){

        this->mouseDown = false;

    });

}

void Bird::mouseMoveEvent(QMouseEvent *event)

{

    //发送自定义信号，告诉窗口移动的位置

    emit this->moving( event->globalPos() - this->m_Pos );

}

void Bird::mouseReleaseEvent(QMouseEvent *event)

{

    //鼠标释放 ，视为鼠标没有按下

    this->mouseDown = false;

}

2.导入资源

3.鸟类创建

4.鸟动画实现

5.鼠标拖拽

6.自动移动

7.右键菜单

8.窗口透明化