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 <QDialog>
#include <QPushButton>
#include <QLabel>
#include <QMouseEvent>
#include <QFont>
#include <QPixmap>
#include <QPainter>
#include<QBitmap>

class MsgBox : public QDialog
{
Q_OBJECT

public:
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("แน่ใจว่า"));
}
}
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("แน่ใจว่า"));
cancel_button->setText(tr("การยกเลิก"));
}
}

//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 <QApplication>

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：