Qt : create dialog (2) - create extensible dialog

First on the effect map. What we want to achieve is that after clicking More, the dialog box will show the expanded state of the image below, and clicking again will retract the effect of the first image.

=="The interface setting part is not too much to go into details. Please refer to the picture and text below and a brief description.

code show as below:

/********************************************************************************
** Form generated from reading UI file 'sortdialog.ui'
**
** Created by: Qt User Interface Compiler version 5.4.2
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_SORTDIALOG_H
#define UI_SORTDIALOG_H

#include <QtCore/QVariant>
#include <QtWidgets/QAction>
#include <QtWidgets/QApplication>
#include <QtWidgets/QButtonGroup>
#include <QtWidgets/QComboBox>
#include <QtWidgets/QDialog>
#include <QtWidgets/QGridLayout>
#include <QtWidgets/QGroupBox>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QLabel>
#include <QtWidgets/QPushButton>
#include <QtWidgets/QSpacerItem>
#include <QtWidgets/QVBoxLayout>

QT_BEGIN_NAMESPACE

class Ui_SortDialog
{
public:
    QGridLayout *gridLayout_4;
    QGroupBox *primarygroupBox;
    QGridLayout *gridLayout;
    QLabel *label;
    QComboBox *primarycolumncomboBox;
    QSpacerItem *horizontalSpacer;
    QLabel *label_2;
    QComboBox *primaryordercomboBox;
    QVBoxLayout *verticalLayout;
    QPushButton *okButton;
    QPushButton *CancelButton;
    QSpacerItem *verticalSpacer;
    QPushButton *moreButton;
    QGroupBox *secondarygroupBox;
    QGridLayout *gridLayout_2;
    QLabel *label_3;
    QComboBox *secondarycolumncomboBox;
    QSpacerItem *horizontalSpacer_2;
    QLabel *label_4;
    QComboBox *secondaryordercomboBox;
    QGroupBox *tertiarygroupBox;
    QGridLayout *gridLayout_3;
    QLabel *label_5;
    QComboBox *tertialycolumncomboBox;
    QSpacerItem *horizontalSpacer_3;
    QLabel *label_6;
    QComboBox *tertiaryordercomboBox;
    QSpacerItem *verticalSpacer_2;

    void setupUi (QDialog *SortDialog)
    {
        if (SortDialog->objectName().isEmpty())
            SortDialog->setObjectName(QStringLiteral("SortDialog"));
        SortDialog->resize(337, 467);
        gridLayout_4 = new QGridLayout(SortDialog);
        gridLayout_4->setSpacing(6);
        gridLayout_4->setContentsMargins(11, 11, 11, 11);
        gridLayout_4->setObjectName(QStringLiteral("gridLayout_4"));
        primarygroupBox = new QGroupBox(SortDialog);
        primarygroupBox->setObjectName(QStringLiteral("primarygroupBox"));
        gridLayout = new QGridLayout(primarygroupBox);
        gridLayout->setSpacing(6);
        gridLayout->setContentsMargins(11, 11, 11, 11);
        gridLayout->setObjectName(QStringLiteral("gridLayout"));
        label = new QLabel(primarygroupBox);
        label->setObjectName(QStringLiteral("label"));

        gridLayout->addWidget(label, 0, 0, 1, 1);

        primarycolumncomboBox = new QComboBox(primarygroupBox);
        primarycolumncomboBox->setObjectName(QStringLiteral("primarycolumncomboBox"));

        gridLayout->addWidget(primarycolumncomboBox, 0, 1, 1, 1);

        horizontalSpacer = new QSpacerItem(29, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);

        gridLayout->addItem(horizontalSpacer, 0, 2, 1, 1);

        label_2 = new QLabel(primarygroupBox);
        label_2->setObjectName(QStringLiteral("label_2"));

        gridLayout->addWidget(label_2, 1, 0, 1, 1);

        primaryordercomboBox = new QComboBox(primarygroupBox);
        primaryordercomboBox->setObjectName(QStringLiteral("primaryordercomboBox"));

        gridLayout->addWidget(primaryordercomboBox, 1, 1, 1, 2);


        gridLayout_4->addWidget(primarygroupBox, 0, 0, 1, 1);

        verticalLayout = new QVBoxLayout();
        verticalLayout->setSpacing(6);
        verticalLayout->setObjectName(QStringLiteral("verticalLayout"));
        okButton = new QPushButton(SortDialog);
        okButton->setObjectName(QStringLiteral("okButton"));
        okButton->setEnabled(true);

        verticalLayout->addWidget(okButton);

        CancelButton = new QPushButton(SortDialog);
        CancelButton->setObjectName(QStringLiteral("CancelButton"));
        CancelButton->setEnabled(false);

        verticalLayout->addWidget(CancelButton);

        verticalSpacer = new QSpacerItem(20, 13, QSizePolicy::Minimum, QSizePolicy::Expanding);

        verticalLayout->addItem(verticalSpacer);

        moreButton = new QPushButton(SortDialog);
        moreButton->setObjectName(QStringLiteral("moreButton"));
        moreButton->setEnabled(true);

        verticalLayout->addWidget(moreButton);


        gridLayout_4->addLayout(verticalLayout, 0, 1, 2, 1);

        secondarygroupBox = new QGroupBox(SortDialog);
        secondarygroupBox->setObjectName(QStringLiteral("secondarygroupBox"));
        gridLayout_2 = new QGridLayout(secondarygroupBox);
        gridLayout_2->setSpacing(6);
        gridLayout_2->setContentsMargins(11, 11, 11, 11);
        gridLayout_2->setObjectName(QStringLiteral("gridLayout_2"));
        label_3 = new QLabel(secondarygroupBox);
        label_3->setObjectName(QStringLiteral("label_3"));

        gridLayout_2->addWidget(label_3, 0, 0, 1, 1);

        secondarycolumncomboBox = new QComboBox(secondarygroupBox);
        secondarycolumncomboBox->setObjectName(QStringLiteral("secondarycolumncomboBox"));

        gridLayout_2->addWidget(secondarycolumncomboBox, 0, 1, 1, 1);

        horizontalSpacer_2 = new QSpacerItem(54, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);

        gridLayout_2->addItem(horizontalSpacer_2, 0, 2, 1, 1);

        label_4 = new QLabel(secondarygroupBox);
        label_4->setObjectName(QStringLiteral("label_4"));

        gridLayout_2->addWidget(label_4, 1, 0, 1, 1);

        secondaryordercomboBox = new QComboBox(secondarygroupBox);
        secondaryordercomboBox->setObjectName(QStringLiteral("secondaryordercomboBox"));

        gridLayout_2->addWidget(secondaryordercomboBox, 1, 1, 1, 2);


        gridLayout_4->addWidget(secondarygroupBox, 2, 0, 1, 1);

        tertiarygroupBox = new QGroupBox(SortDialog);
        tertiarygroupBox->setObjectName(QStringLiteral("tertiarygroupBox"));
        gridLayout_3 = new QGridLayout(tertiarygroupBox);
        gridLayout_3->setSpacing(6);
        gridLayout_3->setContentsMargins(11, 11, 11, 11);
        gridLayout_3->setObjectName(QStringLiteral("gridLayout_3"));
        label_5 = new QLabel(tertiarygroupBox);
        label_5->setObjectName(QStringLiteral("label_5"));

        gridLayout_3->addWidget(label_5, 0, 0, 1, 1);

        tertialycolumncomboBox = new QComboBox(tertiarygroupBox);
        tertialycolumncomboBox->setObjectName(QStringLiteral("tertialycolumncomboBox"));

        gridLayout_3->addWidget(tertialycolumncomboBox, 0, 1, 1, 1);

        horizontalSpacer_3 = new QSpacerItem(54, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);

        gridLayout_3->addItem(horizontalSpacer_3, 0, 2, 1, 1);

        label_6 = new QLabel(tertiarygroupBox);
        label_6->setObjectName(QStringLiteral("label_6"));

        gridLayout_3->addWidget(label_6, 1, 0, 1, 1);

        tertiaryordercomboBox = new QComboBox(tertiarygroupBox);
        tertiaryordercomboBox->setObjectName(QStringLiteral("tertiaryordercomboBox"));

        gridLayout_3->addWidget(tertiaryordercomboBox, 1, 1, 1, 2);


        gridLayout_4->addWidget(tertiarygroupBox, 3, 0, 1, 1);

        verticalSpacer_2 = new QSpacerItem(20, 9, QSizePolicy::Minimum, QSizePolicy::Expanding);

        gridLayout_4->addItem(verticalSpacer_2, 1, 0, 1, 1);

        QWidget::setTabOrder(primarycolumncomboBox, primaryordercomboBox);
        QWidget::setTabOrder(primaryordercomboBox, secondarycolumncomboBox);
        QWidget::setTabOrder(secondarycolumncomboBox, secondaryordercomboBox);
        QWidget::setTabOrder(secondaryordercomboBox, tertialycolumncomboBox);
        QWidget::setTabOrder(tertialycolumncomboBox, tertiaryordercomboBox);
        QWidget::setTabOrder(tertiaryordercomboBox, okButton);
        QWidget::setTabOrder(okButton, CancelButton);
        QWidget::setTabOrder(CancelButton, moreButton);

        retranslateUi(SortDialog);
        QObject::connect(okButton, SIGNAL(clicked()), SortDialog, SLOT(accept()));
        QObject::connect(CancelButton, SIGNAL(clicked()), SortDialog, SLOT(reject()));
        QObject::connect(moreButton, SIGNAL(toggled(bool)), secondarygroupBox, SLOT(setVisible(bool)));
        QObject::connect(moreButton, SIGNAL(toggled(bool)), tertiarygroupBox, SLOT(setVisible(bool)));

        QMetaObject::connectSlotsByName(SortDialog);
    } // setupUi

    void retranslateUi(QDialog *SortDialog)
    {
        SortDialog->setWindowTitle(QApplication::translate("SortDialog", "SortDialog", 0));
        primarygroupBox->setTitle(QApplication::translate("SortDialog", "&Primary Key", 0));
        label->setText(QApplication::translate("SortDialog", "Coloumn:", 0));
        primarycolumncomboBox->clear();
        primarycolumncomboBox->insertItems(0, QStringList()
                                           << QApplication::translate("SortDialog", "none", 0)
                                           );
        label_2->setText(QApplication::translate("SortDialog", "Order:", 0));
        primaryordercomboBox->clear();
        primaryordercomboBox->insertItems(0, QStringList()
                                          << QApplication::translate("SortDialog", "Ascending", 0)
                                          << QApplication::translate("SortDialog", "Descending", 0)
                                          );
        okButton->setText(QApplication::translate("SortDialog", "OK", 0));
        CancelButton->setText(QApplication::translate("SortDialog", "Cancel", 0));
        moreButton->setText(QApplication::translate("SortDialog", "&More", 0));
        secondarygroupBox->setTitle(QApplication::translate("SortDialog", "&Secondary Key", 0));
        label_3->setText(QApplication::translate("SortDialog", "Coloumn:", 0));
        secondarycolumncomboBox->clear();
        secondarycolumncomboBox->insertItems(0, QStringList()
                                             << QApplication::translate("SortDialog", "none", 0)
                                             );
        label_4->setText(QApplication::translate("SortDialog", "Order:", 0));
        secondaryordercomboBox->clear();
        secondaryordercomboBox->insertItems(0, QStringList()
                                            << QApplication::translate("SortDialog", "Ascending", 0)
                                            << QApplication::translate("SortDialog", "Descending", 0)
                                            );
        tertiarygroupBox->setTitle(QApplication::translate("SortDialog", "&Tertiary Key", 0));
        label_5->setText(QApplication::translate("SortDialog", "Coloumn:", 0));
        tertialycolumncomboBox->clear();
        tertialycolumncomboBox->insertItems(0, QStringList()
                                            << QApplication::translate("SortDialog", "none", 0)
                                            );
        label_6->setText(QApplication::translate("SortDialog", "Order:", 0));
        tertiaryordercomboBox->clear();
        tertiaryordercomboBox->insertItems(0, QStringList()
                                           << QApplication::translate("SortDialog", "Ascending", 0)
                                           << QApplication::translate("SortDialog", "Descending", 0)
                                           );
    } // retranslateUi

};

namespace Ui {
class SortDialog: public Ui_SortDialog {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_SORTDIALOG_H

#ifndef SORTDIALOG_H
#define SORTDIALOG_H

#include <QDialog>
#include"QChar"
namespace Ui {
class SortDialog;
}

class SortDialog : public QDialog
{
    Q_OBJECT

public:
    explicit SortDialog(QWidget *parent = 0);
    ~SortDialog();
    void setColumnRange(QChar first,QChar last);
private slots:
    void on_moreButton_clicked();

private:
    Ui :: SortDialog * ui;
private:
    bool flag;
};

#endif // SORTDIALOG_H

#include "sortdialog.h"
#include "ui_sortdialog.h"

SortDialog::SortDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::SortDialog)
{
    ui-> setupUi (this);
    ui->secondarygroupBox->hide();
    ui->tertiarygroupBox->hide();
    layout()->setSizeConstraint(QLayout::SetFixedSize);
    setColumnRange('A','Z');

    flag = false;
}

SortDialog::~SortDialog()
{
    delete ui;
}
void SortDialog::setColumnRange(QChar first,QChar last)
{
    ui->primarycolumncomboBox->clear();
    ui->secondarycolumncomboBox->clear();
    ui->tertialycolumncomboBox->clear();

    ui->secondarycolumncomboBox->addItem(tr("none"));
    ui->tertialycolumncomboBox->addItem(tr("none"));
    ui->primarycolumncomboBox->setMinimumSize(ui->secondarycolumncomboBox->sizeHint());

    QChar ch =first;
    while(ch <= last)
    {
        ui->primarycolumncomboBox->addItem(QString(ch));
        ui->secondarycolumncomboBox->addItem(QString(ch));
        ui->tertialycolumncomboBox->addItem(QString(ch));
        ch = ch.unicode() +1;
    }
}

void SortDialog::on_moreButton_clicked()
{
    flag = !flag;
    if(flag){
    ui->secondarygroupBox->show();
    ui->tertiarygroupBox->show();
    }
    else
    {
        ui->secondarygroupBox->hide();
        ui->tertiarygroupBox->hide();
    }
}