標準對話框

#include "msgboxdlg.h"
#include <QMessageBox>

MsgBoxDlg::MsgBoxDlg(QWidget* parent):QDialog(parent)
{
    setWindowTitle("標準資訊對話框集合");

    //構造部件
    m_tipLabel = new QLabel("請選擇一種訊息框");
    m_questionBtn = new QPushButton("問題訊息框");
    m_informationBtn = new QPushButton("資訊訊息框");
    m_warningBtn = new QPushButton("警告訊息框");
    m_criticalBtn = new QPushButton("錯誤訊息框");
    m_aboutBtn = new QPushButton("關于訊息框");
    m_aboutQtBtn = new QPushButton("關于Qt訊息框");

    //布局界面
    m_mainLayout = new QGridLayout(this);
    m_mainLayout->addWidget(m_tipLabel,0,0,1,2);
    m_mainLayout->addWidget(m_questionBtn,1,0);
    m_mainLayout->addWidget(m_informationBtn,1,1);
    m_mainLayout->addWidget(m_warningBtn,2,0);
    m_mainLayout->addWidget(m_criticalBtn,2,1);
    m_mainLayout->addWidget(m_aboutBtn,3,0);
    m_mainLayout->addWidget(m_aboutQtBtn,3,1);

    connect(m_questionBtn,&QPushButton::clicked,
            this,&MsgBoxDlg::showQuestionMsgDlg);
    connect(m_informationBtn,&QPushButton::clicked,
            this,&MsgBoxDlg::showInfoMsgDlg);
    connect(m_warningBtn,&QPushButton::clicked,
            this,&MsgBoxDlg::showWarnMsgDlg);
    connect(m_criticalBtn,&QPushButton::clicked,
            this,&MsgBoxDlg::showCriticalMsgDlg);
    connect(m_aboutBtn,&QPushButton::clicked,
            this,&MsgBoxDlg::showAboutMsgDlg);
    connect(m_aboutQtBtn,&QPushButton::clicked,
            this,&MsgBoxDlg::showAboutQtMsgDlg);

}

void MsgBoxDlg::showQuestionMsgDlg()
{
    m_tipLabel->setText("問題訊息框");
    int res = QMessageBox::question(this,
                          "問題訊息框",
                          "您已打開問題訊息框，是否關閉？",
                          QMessageBox::Ok |
                          QMessageBox::Cancel,
                          QMessageBox::Ok);

    switch (res){
    case QMessageBox::Ok:
        m_tipLabel->setText("問題訊息框-確定");
        break;
    case QMessageBox::Cancel:
        m_tipLabel->setText("問題訊息框-取消");
        break;
    default:
        break;
    }
}

void MsgBoxDlg::showInfoMsgDlg()
{
    m_tipLabel->setText("資訊訊息框");
    QMessageBox::information(this,
                             "資訊提示框",
                             "這是個資訊提示框，我也不知道寫點啥？");
}

void MsgBoxDlg::showWarnMsgDlg()
{
    m_tipLabel->setText("警告訊息框");
    int res = QMessageBox::warning(this,
                         "警告訊息框",
                         "您有未保存的資料，是否保存？",
                         QMessageBox::Save |
                         QMessageBox::Discard |
                         QMessageBox::Cancel,
                         QMessageBox::Save);

    switch(res){
    case QMessageBox::Save:
        m_tipLabel->setText("點擊了保存");
        break;
    case QMessageBox::Discard:
        m_tipLabel->setText("點擊了忽視");
        break;
    case QMessageBox::Cancel:
        m_tipLabel->setText("點擊了取消");
        break;
    default:
        break;
    }
}

void MsgBoxDlg::showCriticalMsgDlg()
{
    m_tipLabel->setText("錯誤訊息框");
    QMessageBox::critical(this,
                          "錯誤訊息框",
                          "發生重大錯誤！！！");
}

void MsgBoxDlg::showAboutMsgDlg()
{
    m_tipLabel->setText("關于訊息框");
    QMessageBox::about(this,
                       "關于",
                       "這是個關于關于的資訊，");
}

void MsgBoxDlg::showAboutQtMsgDlg()
{
    m_tipLabel->setText("關于Qt訊息框");
    QMessageBox::aboutQt(this,"關于Qt...");
}