QT自定义模态对话框

新建一个MsgBox类

msgbox.h 代码

#ifndef MSGBOX_H#define MSGBOX_H#include #include #include #include #include #include #include #includeclass MsgBox : public QDialog{    Q_OBJECTpublic:    MsgBox(QWidget *parent = 0);    ~MsgBox();public:    QPushButton *ok_button;    QPushButton *close_button;    QPushButton *cancel_button;    QLabel *ask_label;    QLabel *msg_label;    QLabel *title_label;    QString ok_text;    QString cancel_text;public:    void setInfo(QString title_info, QString info,QPixmap pixmap, bool is_ok_hidden,QString language);protected:    QPoint move_point;    bool mouse_press;    void paintEvent(QPaintEvent *);    void mousePressEvent( QMouseEvent * event );    void mouseReleaseEvent( QMouseEvent *);    void mouseMoveEvent(QMouseEvent *event);public slots:    void okOperate();    void cancelOperate();    void closeOperate();};#endif // MSGBOX_H

msgbox.cpp 代码

#include "msgbox.h"MsgBox::MsgBox(QWidget *parent)    : QDialog(parent){      this->resize(320, 160);      //获取主界面的宽度      int width = this->width();      int height = this->height();      //初始化为未按下鼠标左键      mouse_press = false;      //设置标题栏隐藏      this->setWindowFlags(Qt::FramelessWindowHint | Qt::Dialog);      close_button = new QPushButton(this);      //close_button->loadPixmap(":/image/images/bg.png");      close_button->setGeometry(width-30,5, 20, 20);      close_button->setStyleSheet("border-image:url(:/image/images/closeBtn.png);");      //设置标题      title_label = new QLabel(this);      title_label->setObjectName(QString::fromUtf8("labelOne"));      QFont font = title_label->font();      font.setBold(true);      title_label->setFont(font);      title_label->setGeometry(0, 0, width-50, 30);      //设置提示图片      msg_label = new QLabel(this);      msg_label->setGeometry(20, 50, 36, 36);      msg_label->setScaledContents(true);      //设置提示信息，让QLabel能够自动判断并换行显示：      ask_label = new QLabel(this);      ask_label->setGeometry(65, 60, width-50, 25*2);      ask_label->setWordWrap(true);      ask_label->setAlignment(Qt::AlignTop);      cancel_button = new QPushButton(this);      cancel_button->resize(70, 25);      cancel_button->move(width - cancel_button->width() - 10, height - 35);      ok_button = new QPushButton(this);      ok_button->resize(70, 25);      ok_button->move(width - ok_button->width() - cancel_button->width() - 20, height - 35);      ok_button->setObjectName(QString::fromUtf8("pushButtonTwo"));      cancel_button->setObjectName(QString::fromUtf8("pushButtonTwo"));      QObject::connect(ok_button, SIGNAL(clicked()), this, SLOT(okOperate()));      QObject::connect(close_button, SIGNAL(clicked()), this, SLOT(closeOperate()));      QObject::connect(cancel_button, SIGNAL(clicked()), this, SLOT(cancelOperate()));}MsgBox::~MsgBox(){}//设置对话框信息void MsgBox::setInfo(QString title_info, QString info,QPixmap pixmap,bool is_ok_hidden,QString language){  title_label->setText(QString("  ") + title_info);  //设置提示信息  ask_label->setText(info);  msg_label->setPixmap(pixmap);  //是否隐藏确定按钮  ok_button->setHidden(is_ok_hidden);  if(is_ok_hidden)  {      if(language == "中文")      {          cancel_button->setText(tr("确定"));      }      else if(language == "英文")      {          cancel_button->setText(tr("OK"));      }      else if(language == "泰文")      {          cancel_button->setText(tr(""));      }  }  else  {      if(language == "中文")      {          ok_button->setText(tr("确定"));          cancel_button->setText(tr("取消"));      }      else if(language == "英文")      {          ok_button->setText(tr("OK"));          cancel_button->setText(tr("Cancel"));      }      else if(language == "泰文")      {          ok_button->setText(tr(""));          cancel_button->setText(tr(""));      }  }  //设置默认按钮为取消按钮  cancel_button->setFocus();}void MsgBox::paintEvent(QPaintEvent *){  QPainter painter(this);  painter.drawPixmap(rect(), QPixmap(":/image/images/close.png"));  QBitmap bitmap(this->size());  QPainter painter2(&bitmap);  painter2.fillRect(bitmap.rect(), Qt::white);  painter2.setBrush(QColor(0, 0, 0));  painter2.drawRoundedRect(rect(), 4, 4);  setMask(bitmap);}void MsgBox::mousePressEvent( QMouseEvent * event ){  //只能是鼠标左键移动和改变大小  if(event->button() == Qt::LeftButton)  {    mouse_press = true;  }  //窗口移动距离  move_point = event->globalPos() - pos();}void MsgBox::mouseReleaseEvent( QMouseEvent *){  mouse_press = false;}void MsgBox::mouseMoveEvent(QMouseEvent *event){  //移动窗口  if(mouse_press)  {    QPoint move_pos = event->globalPos();    move(move_pos - move_point);  }}//确认操作void MsgBox::okOperate(){  this->accept();}//取消操作void MsgBox::cancelOperate(){  this->reject();}//关闭窗体操作void MsgBox::closeOperate(){    close();}

主函数调用代码：

#include "msgbox.h"#include int main(int argc, char *argv[]){    QApplication a(argc, argv);    MsgBox w;    w.setInfo(QString("提示："),QString("是否关机？"),QPixmap(":/image/images/tip.png"),false,QString("中文"));    w.show();    return a.exec();}

目录构建图：

实现效果图：