qt实现伸缩框

清疚 2022-04-17 02:07 315阅读 0赞

.h文件

#ifndef MAINWINDOW_H
    #define MAINWINDOW_H
    
    #include <QMainWindow>
    #include <QPushButton>
    #include <QFrame>
    #include <QSplitter>
    #include <QMouseEvent>
    #include <QTableWidget>
    namespace Ui {
    class MainWindow;
    }
    
    class MainWindow : public QMainWindow
    {
        Q_OBJECT
    
    public:
        explicit MainWindow(QWidget *parent = 0);
        ~MainWindow();
        void setBtnPos();
        void setBtnIcon();
    
    
    private:
        Ui::MainWindow *ui;
        //QPushButton *pushButton;
        QFrame *m_Rframe;
        QTableWidget  *m_Lframe;
    
        QSplitter *m_sp;
        QPushButton *m_pButton;
        bool m_bInitShow;
        QList<qint32> base;//左右布局的宽度
    
    
    
    protected:
        void showEvent(QShowEvent *event);
        void resizeEvent(QResizeEvent *event);
        void mouseMoveEvent(QMouseEvent *event);
    
    private slots:
        void sl_splitterMoved(int pos, int index);
        void sl_btnClicked();
    };
    
    #endif // MAINWINDOW_H

.cpp文件

#include "mainwindow.h"
    #include "ui_mainwindow.h"
    #include <stdio.h>
    #include <QDesktopWidget>
    
    #include <QPalette>
    #include <QDebug>
    #include <QList>
    
    MainWindow::MainWindow(QWidget *parent) :
        QMainWindow(parent),
        ui(new Ui::MainWindow), m_bInitShow(false)
    {
        ui->setupUi(this);
    
    
    //    m_Lframe = new QFrame;
    //    m_Rframe = new QFrame;
    //    m_sp     = new QSplitter(this);
        m_Lframe = ui->tableWidget;
        m_Rframe=ui->frame;
        m_sp= ui->splitter;
    
    
        m_pButton= new QPushButton(this); // after Splitter
        setBtnPos();
    
    //    m_sp->addWidget(ui->tableWidget);
    //    m_sp->addWidget(m_Rframe);
    
        connect(m_sp,SIGNAL(splitterMoved(int,int)),this,SLOT(sl_splitterMoved(int,int)));
        connect(m_pButton,SIGNAL(clicked()),this,SLOT(sl_btnClicked()));
    
    //    setCentralWidget(m_sp);
        //setWindowFlags(Qt::FramelessWindowHint);
    
        m_Lframe->setMouseTracking(true);
        m_Rframe->setMouseTracking(true);
        m_sp->setMouseTracking(true);
        m_pButton->setMouseTracking(true);
        setMouseTracking(true);
    
    }
    
    
    
    MainWindow::~MainWindow()
    {
        delete ui;
    }
    
    void MainWindow::setBtnPos()//把Button移动到分割线中间位置
    {
        int width=m_Lframe->width()-m_pButton->width();
        int heigh=(m_Lframe->height()-m_pButton->height())/2;
        m_pButton->move(width,heigh);
    }
    
    void MainWindow::setBtnIcon()//选择button图片
    {
        if(m_Rframe->width()!=0)
        {
            m_pButton->setIcon(QIcon(":/png/image/quit.png"));
        }
        else
        {
            m_pButton->setIcon(QIcon(":/png/image/update.png"));
        }
    }
    
    void MainWindow::showEvent(QShowEvent *event)
    {
    
        if(!m_bInitShow)
        {
    
            m_bInitShow=true;
    
            QPalette p2=m_Rframe->palette(); // initial the frame back round
            p2.setColor(QPalette::Window,Qt::gray);
            p2.setColor(QPalette::WindowText,Qt::red);
            m_Rframe->setPalette(p2);
            m_Rframe->setAutoFillBackground(true);
            m_Rframe->setMaximumWidth(300);
    
            base= m_sp->sizes();
    
            m_pButton->setFixedSize(32,32);
            m_pButton->setIconSize(QSize(16,16));
            m_pButton->setVisible(true);
            m_pButton->setStyleSheet("border:none;");
            setBtnPos();  //设置button位置
            setBtnIcon(); //显示对应图片
        }
    
        QMainWindow::showEvent(event);
    
    }
    void MainWindow::resizeEvent(QResizeEvent *event)
    {
        setBtnPos();
        QMainWindow::resizeEvent(event);
    }
    
    void MainWindow::sl_splitterMoved(int pos,int index)
    {
    
        setBtnPos();
        if(m_Rframe->width()==0)
        {
            setBtnIcon();
        }
    }
    
    
    void MainWindow::sl_btnClicked()//设置左右布局的宽度
    {
        // static  QList<qint32> base= m_sp->sizes(); //keep the initial pos
        QList<qint32>  newSize;
    
        if(m_Rframe->width()!=0)
        {
            newSize<<base.at(0)+base.at(1)<<0;
        }
        else
        {
            newSize<<base.at(0)<<base.at(1);
        }
        m_sp->setSizes(newSize);  //move the SPLITTER
    
        setBtnPos();
        setBtnIcon();
    
    }
    
    void MainWindow::mouseMoveEvent(QMouseEvent *event)
    {
    
        int isWidth  = m_pButton->pos().x()+m_pButton->width();
        int isHeight = m_pButton->pos().y()+m_pButton->height();
    
        int x=event->pos().x();
        int y=event->pos().y();
    
        if(x>m_pButton->pos().x()&&x<isWidth&&y>m_pButton->y()&&y<isHeight)
        {
            m_pButton->setVisible(true);
        }
    
        else
        {
            m_pButton->setVisible(true);
        }
    
    
    }

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![2018111120452655.png][]![2018111120452643.png][]

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[20181111204336635.png]: /images/20220417/09fd406b7b8148fea98514783b99c5f3.png
[2018111120452655.png]: https://img-blog.csdnimg.cn/2018111120452655.png
[2018111120452643.png]: /images/20220417/618aae1ef4864e2da1b787309e2b8dbd.png