[Qt练习]QIuputDialog 和 QMessageBox

dlg.h

#ifndef MYDLG_H
#define MYDLG_H
#include <QDialog>

class QPushButton;
class QLabel;
class QString;

class Mydlg:public QDialog
{

    Q_OBJECT
public:
    Mydlg(QWidget * parent = 0);

signals:
    void setTxt(QString txt);

public slots:

    void slot_input_txt();

private:
    QPushButton *btnok;
    QLabel * labeltxt;
    QString txt;
    QWidget * pParent;

};


#endif // MYDLG_H

dlg.cpp

#include <QtGui>
#include <QWidget>
#include <QString>
#include <QVBoxLayout>
#include <QInputDialog>
#include <QMessageBox>
#include "mydlg.h"

Mydlg::Mydlg(QWidget * parent ) : QDialog(parent)
{
    btnok = new QPushButton("ok");
    labeltxt = new QLabel("showtext");
    QVBoxLayout *layout = new QVBoxLayout;
    pParent = parent;
    layout->addWidget(btnok);
    layout->addWidget(labeltxt);
    connect(btnok, SIGNAL(clicked()), this, SLOT(slot_input_txt()));
 
    //连接槽实现点击输入对话框确定按钮将输入的文本显示在标签控件上
    connect(this,SIGNAL(setTxt(QString)), labeltxt,SLOT(setText(QString)));
    resize(300,200);
    setLayout(layout);
}

void Mydlg::slot_input_txt()
{
    bool isOk;
    txt = QInputDialog::getText(pParent, "Input Dialog",
                                "Please input your Text",
                                QLineEdit::Normal,"", &isOk);
    if(isOk)
    {
        QMessageBox ::information(pParent, "information",
                                  "Your comment is <b><color = red>" + txt + "</b></color>",
                                  QMessageBox::Yes|QMessageBox::No, QMessageBox::Yes);
        emit(setTxt(txt));
    }

}

main.cpp

#include <QApplication>
#include "mydlg.h"

int main(int argc, char**argv)
{
    QApplication app(argc, argv);

    Mydlg *dlg = new Mydlg;
    dlg->show();

    return app.exec();
}

 

运行

点击ok

输入 show me text

 

点击ok,显示 messagebox

 

点击"yes"