c++ - 如何在搜索表单的 QMessageBox 中包含 QLineEdit

Question

我需要实现一个搜索表单(我已经有了这个功能)，但我不知道如何将 QlineEdit 和 QPushButton 添加到 QMessageBox 中(如果我可以这样说的话)。

Answer 1

您可以继承 QDialog 并将其用作消息框

搜索对话框.h:

#ifndef SEARCHDIALOG_H
#define SEARCHDIALOG_H

#include <QDialog>
#include <QLineEdit>

class SearchDialog : public QDialog
{
    Q_OBJECT
public:
    explicit SearchDialog(QWidget *parent = 0);

    QString searchString() const;

private:
    QLineEdit *m_lineEdit;
};

#endif // SEARCHDIALOG_H

搜索对话框.cpp

#include "searchdialog.h"

#include <QVBoxLayout>
#include <QPushButton>
#include <QDialogButtonBox>

SearchDialog::SearchDialog(QWidget *parent) :
    QDialog(parent)
{
    m_lineEdit = new QLineEdit(this);

    QPushButton *searchButton = new QPushButton(tr("Search"));
    searchButton->setDefault(true);

    QPushButton *cancelButton = new QPushButton(tr("Cancel"));

    QDialogButtonBox *buttonBox = new QDialogButtonBox(Qt::Horizontal);
    buttonBox->addButton(searchButton, QDialogButtonBox::AcceptRole);
    buttonBox->addButton(cancelButton, QDialogButtonBox::RejectRole);

    connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

    QVBoxLayout *lt = new QVBoxLayout;
    lt->addWidget(m_lineEdit);
    lt->addWidget(buttonBox);

    setLayout(lt);
}

QString SearchDialog::searchString() const
{
    return m_lineEdit->text();
}

主要.cpp

#include <QtGui/QApplication>
#include <QtGui/QMessageBox>

#include <QLabel>

#include "searchdialog.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QLabel lbl;
    SearchDialog *dialog = new SearchDialog(&lbl);
    lbl.show();

    QString searchString;

    if (dialog->exec()) {
        searchString = dialog->searchString();
        lbl.setText(searchString);
    }

    return a.exec();
}