如何自定义QMessageBox的窗口大小

1.思路

新创建一个类继承QMessageBox，重载resizeEvent(QResizeEvent*event)函数

2.实现

//============================================
//Brief:    继承QMessageBox实现自定义窗口大小
//Email:    [email protected]
//Date:		
//============================================

#ifndef AUTOMESSAGEBOX_H
#define AUTOMESSAGEBOX_H

#include <QMessageBox>
#include <QWidget>
#include <QResizeEvent>

class CAutoMessageBox:public QMessageBox
{
    Q_OBJECT
public:
    explicit CAutoMessageBox(QWidget*parent=0);
    ~CAutoMessageBox(){}

public:
    void AutoSetSize(int width,int high);

protected:
    void resizeEvent(QResizeEvent*event);

private:
    int m_width;
    int m_high;

};


#endif // AUTOMESSAGEBOX_H

#include "automessagebox.h"

CAutoMessageBox::CAutoMessageBox(QWidget *parent):QMessageBox(parent)
                                                  ,m_width(0)
                                                  ,m_high(0)
{

}

void CAutoMessageBox::AutoSetSize(int width, int high)
{
    m_width = width;
    m_high  = high;
}

void CAutoMessageBox::resizeEvent(QResizeEvent *event)
{
    setFixedSize(m_width,m_high);
}

3.测试

#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>

namespace Ui {
class Widget;
}

class Widget : public QWidget
{
    Q_OBJECT

public:
    explicit Widget(QWidget *parent = 0);
    ~Widget();

private slots:
    void on_pushButton_clicked();

private:
    Ui::Widget *ui;
};


#include "widget.h"
#include "ui_widget.h"
#include "automessagebox.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
}

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

void Widget::on_pushButton_clicked()
{
    CAutoMessageBox msg;
    msg.AutoSetSize(768,512);

    msg.setText(tr("hello world,hello QT..."));
    msg.setWindowTitle(tr("INFO"));
    msg.setStyleSheet("font:14px;background-color:rgb(255,224,220)");

    msg.setIcon(QMessageBox::Critical);
    msg.addButton(tr("YES"),QMessageBox::ActionRole);
    msg.addButton(tr("NO"),QMessageBox::AcceptRole);

    msg.exec();
}


#endif // WIDGET_H