Qt之 自定义QMessageBox(提示框)

头文件的编写：

#pragma once

#include "qdialog.h"
#include <QPushButton>
#include <QLabel>
#include <QMouseEvent>
class MsgBox :
    public QDialog
{
    Q_OBJECT
public:
    MsgBox(int style,QString text);
    ~MsgBox(void);
public:
    QPushButton *okBtn;
    QPushButton *cancleBtn;
    QPushButton *closeBtn;
    QPushButton * msgBtn;
    QLabel * titleLabel;
    QLabel *askLabel;
protected:
    QPoint move_point;                                    //移动的距离
    bool mouse_press;                                    //鼠标按下
    void mousePressEvent(QMouseEvent *qevent);            //鼠标按下事件
    void mouseReleaseEvent(QMouseEvent *qevent);         //鼠标释放事件
    void mouseMoveEvent(QMouseEvent *qevent);             //鼠标移动事件
public slots:
    void okBtn_press();
    void cancleBtn_press();
    void closeBtn_press();

};

CPP文件的编写：

#include "MsgBox.h"
MsgBox::MsgBox(int style,QString text)
{
    this->resize(332,167);

  //获取主界面的宽度
    int width = this->width();
    int height = this->height();
    setStyleSheet("QWidget{background-color: rgb(219,229,245);}");
  //初始化为未按下鼠标左键

  //设置标题栏隐藏
    this->setWindowFlags(Qt::FramelessWindowHint | Qt::Dialog);
    titleLabel = new QLabel(this);
    titleLabel->setGeometry(0,0,width,30);
    if(style==1)
        titleLabel->setText(QStringLiteral("  警告  "));
    else
        titleLabel->setText(QStringLiteral("  提示  "));
    titleLabel->setStyleSheet("QLabel{font-family :微软雅黑;font-size : 5em;color : rgb(255,255,255);background-color: rgb(139,159,185);}");

    closeBtn = new QPushButton(this);
    closeBtn->setGeometry(width-30, 5, 20, 20);
    closeBtn->setStyleSheet("QPushButton{image:url(MsgCLose.png);background: transparent;border:none;}QPushButton:hover{image:url(MsgClose_H.png);background: transparent;border:none;}QPushButton:pressed{image:url(MsgClose_C.png);background: transparent;border:none;}");
    
    msgBtn = new QPushButton(this);
    msgBtn->setGeometry(40,56,44,44);
    if(style == 1)
        msgBtn->setStyleSheet("QPushButton{image:url(warning.png);background: transparent;border:none;}");
    else if(style == 2)
        msgBtn->setStyleSheet("QPushButton{image:url(HINT.png);background: transparent;border:none;}");
    else if(style == 3)
        msgBtn->setStyleSheet("QPushButton{image:url(query.png);background: transparent;border:none;}");

    askLabel = new QLabel(this);
    askLabel->setGeometry(133,56,width,50);
    askLabel->setText(text);

    okBtn=new QPushButton(this);
    if(style==3)
        okBtn->setGeometry(90,119,85,30);
    else
        okBtn->setGeometry(135,119,85,30);
    okBtn->setText(QStringLiteral("确定"));
    okBtn->setStyleSheet("QPushButton{border:1px groove gray;border-radius:4px;border-color: rgb(139,159,185);}QPushButton:hover{background-color: rgb(119,146,183);}QPushButton:pressed{background-color: rgb(139,159,185);}");

    cancleBtn=new QPushButton(this);
    cancleBtn->setGeometry(187,119,85,30);
    cancleBtn->setText(QStringLiteral("取消"));
    cancleBtn->setStyleSheet("QPushButton{border:1px groove gray;border-radius:4px;border-color: rgb(139,159,185);}QPushButton:hover{background-color: rgb(119,146,183);}QPushButton:pressed{background-color: rgb(139,159,185);}");
    if(style == 3)
        cancleBtn->show();
    else
        cancleBtn->hide();

    connect(okBtn,SIGNAL(clicked()),this,SLOT(okBtn_press()));
    connect(closeBtn,SIGNAL(clicked()),this,SLOT(closeBtn_press()));
    connect(cancleBtn,SIGNAL(clicked()),this,SLOT(cancleBtn_press()));
}




MsgBox::~MsgBox(void)
{
}



void MsgBox::mousePressEvent(QMouseEvent *qevent)
{  
    if(qevent->button() == Qt::LeftButton)
    {
        mouse_press = true;
        //鼠标相对于窗体的位置（或者使用event->globalPos() - this->pos()）
        move_point = qevent->pos();;
    }
}
void MsgBox::mouseMoveEvent(QMouseEvent *qevent)
{
    //若鼠标左键被按下
    if(mouse_press)
    {
        //鼠标相对于屏幕的位置
        QPoint move_pos = qevent->globalPos();

        //移动主窗体位置
        this->move(move_pos - move_point);
    }
}
void MsgBox::mouseReleaseEvent(QMouseEvent *qevent)
{  
    //设置鼠标为未被按下
    mouse_press = false;
}

void MsgBox::okBtn_press()
{
    //qDebug()<<1;
    this->accept();
}
void MsgBox::cancleBtn_press()
{
    this->reject();
}
void MsgBox::closeBtn_press()
{
    close();
}

//调用提示框

void dialog::showBox()
{

    MsgBox *msgBox=new MsgBox(1,QStringLiteral("请输入卡口名或路口名"));//1为警告框
    int nRes=msgBox->exec();
    msgBox=new MsgBox(2,QStringLiteral("请输入卡口名或路口名"));//2为提示框
    nRes=msgBox->exec();
    msgBox=new MsgBox(3,QStringLiteral("确定修改路口名称"));//3为询问框
    nRes=msgBox->exec();
    if(nRes==QDialog::Accepted)
    {    
    //  处理按下确定按钮的语句
    }
    else if(nRes==QDialog::Rejected)
    {    
        //处理按下取消或者关闭按钮的语句
    }
}