Qt --- 自定义提示框类似QMessagebox

QMessageBox::information(NULL, QString("title"), QString("I am information"));

以下是自定义提示框的代码，有图有真相！提示框大部分都采用模态的形式，关于模态也不再多提！所以父类为QDialog，通过exec()返回值QDialog::Accepted或QDialog::Rejected来进行判断执行相应的事件。

#include "msg_box.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 PushButton(this);close_button->loadPixmap("tipclose");close_button->setGeometry(width-30, 0, 30, 30); //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-100, 25*2);ask_label->setWordWrap(true);ask_label->setAlignment(Qt::AlignTop);check_box = new QCheckBox(this);check_box->setGeometry(10, height - 35, 160, 25);check_box->setHidden(true);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);check_box->setStyleSheet("background:transparent;");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(cancelOperate()));QObject::connect(cancel_button, SIGNAL(clicked()), this, SLOT(cancelOperate()));this->translateLanguage();
}void MsgBox::translateLanguage()
{close_button->setToolTip(tr("close"));check_box->setText(tr("remember"));ok_text = tr("ok");cancel_text = tr("cancel");
}void MsgBox::setInfo(QString title_info, QString info, QPixmap pixmap, bool is_check_hidden, bool is_ok_hidden)
{title_label->setText(QString("  ") + title_info);//设置提示信息ask_label->setText(info);msg_label->setPixmap(pixmap);//是否隐藏复选框check_box->setChecked(false);check_box->setHidden(is_check_hidden);//是否隐藏确定按钮ok_button->setHidden(is_ok_hidden);if(is_ok_hidden){cancel_button->setText(ok_text);}else{ok_button->setText(ok_text);cancel_button->setText(cancel_text);}//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(":/icon/tip"));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);}
}void MsgBox::okOperate()
{bool is_hidden = check_box->isHidden();if(!is_hidden){bool is_checked = check_box->isChecked();emit msgChecked(is_checked, true);}this->accept();
}void MsgBox::cancelOperate()
{bool is_check_hidden = check_box->isHidden();bool is_ok_hidden = ok_button->isHidden();if(!is_check_hidden){bool is_checked = check_box->isChecked();if(!is_ok_hidden){emit msgChecked(is_checked, false);}else{emit okMessageHidden(is_checked);} }this->reject();
}

效果图：

MsgBox *msg_box = new MsgBox();msg_box->setInfo(QString("文件删除"), QString("确实要把文件放入回收站吗?"), QPixmap(":/icon/attention"), true, false);msg_box->exec();

MsgBox *msg_box2 = new MsgBox();msg_box2->setInfo(QString("重命名"), QString("文件名不能包含下列任何字符：\n    \\ / : * ? \" < > |"), QPixmap(":/icon/attention"), true, true);msg_box2->exec();

MsgBox *msg_box3 = new MsgBox();msg_box3->setInfo(QString("批量文件删除"), QString("确实要把所有文件放入回收站吗?"), QPixmap(":/icon/attention"), false, false);msg_box3->exec();