QT中Dialog的使用

先看看效果图：

pages.h

#ifndef PAGES_H
#define PAGES_H

#include <QWidget>

class ConfigurationPage : public QWidget
{
public:
    ConfigurationPage(QWidget *parent = 0);
};

class QueryPage : public QWidget
{
public:
    QueryPage(QWidget *parent = 0);
};

class UpdatePage : public QWidget
{
public:
    UpdatePage(QWidget *parent = 0);
};

#endif

pages.cpp

#include <QtGui>

#include "pages.h"

ConfigurationPage::ConfigurationPage(QWidget *parent)
    : QWidget(parent)
{
    QGroupBox *configGroup = new QGroupBox(tr("Server configuration"));

    QLabel *serverLabel = new QLabel(tr("Server:"));
    QComboBox *serverCombo = new QComboBox;
    serverCombo->addItem(tr("Qt (Australia)"));
    serverCombo->addItem(tr("Qt (Germany)"));
    serverCombo->addItem(tr("Qt (Norway)"));
    serverCombo->addItem(tr("Qt (People's Republic of China)"));
    serverCombo->addItem(tr("Qt (USA)"));

    QHBoxLayout *serverLayout = new QHBoxLayout;
    serverLayout->addWidget(serverLabel);
    serverLayout->addWidget(serverCombo);

    QVBoxLayout *configLayout = new QVBoxLayout;
    configLayout->addLayout(serverLayout);
    configGroup->setLayout(configLayout);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(configGroup);
    mainLayout->addStretch(1);
    setLayout(mainLayout);
}

UpdatePage::UpdatePage(QWidget *parent)
    : QWidget(parent)
{
    QGroupBox *updateGroup = new QGroupBox(tr("Package selection"));
    QCheckBox *systemCheckBox = new QCheckBox(tr("Update system"));
    QCheckBox *appsCheckBox = new QCheckBox(tr("Update applications"));
    QCheckBox *docsCheckBox = new QCheckBox(tr("Update documentation"));

    QGroupBox *packageGroup = new QGroupBox(tr("Existing packages"));

    QListWidget *packageList = new QListWidget;
    QListWidgetItem *qtItem = new QListWidgetItem(packageList);
    qtItem->setText(tr("Qt"));
    QListWidgetItem *qsaItem = new QListWidgetItem(packageList);
    qsaItem->setText(tr("QSA"));
    QListWidgetItem *teamBuilderItem = new QListWidgetItem(packageList);
    teamBuilderItem->setText(tr("Teambuilder"));

    QPushButton *startUpdateButton = new QPushButton(tr("Start update"));

    QVBoxLayout *updateLayout = new QVBoxLayout;
    updateLayout->addWidget(systemCheckBox);
    updateLayout->addWidget(appsCheckBox);
    updateLayout->addWidget(docsCheckBox);
    updateGroup->setLayout(updateLayout);

    QVBoxLayout *packageLayout = new QVBoxLayout;
    packageLayout->addWidget(packageList);
    packageGroup->setLayout(packageLayout);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(updateGroup);
    mainLayout->addWidget(packageGroup);
    mainLayout->addSpacing(12);
    mainLayout->addWidget(startUpdateButton);
    mainLayout->addStretch(1);
    setLayout(mainLayout);
}

QueryPage::QueryPage(QWidget *parent)
    : QWidget(parent)
{
    QGroupBox *packagesGroup = new QGroupBox(tr("Look for packages"));

    QLabel *nameLabel = new QLabel(tr("Name:"));
    QLineEdit *nameEdit = new QLineEdit;

    QLabel *dateLabel = new QLabel(tr("Released after:"));
    QDateTimeEdit *dateEdit = new QDateTimeEdit(QDate::currentDate());

    QCheckBox *releasesCheckBox = new QCheckBox(tr("Releases"));
    QCheckBox *upgradesCheckBox = new QCheckBox(tr("Upgrades"));

    QSpinBox *hitsSpinBox = new QSpinBox;
    hitsSpinBox->setPrefix(tr("Return up to "));
    hitsSpinBox->setSuffix(tr(" results"));
    hitsSpinBox->setSpecialValueText(tr("Return only the first result"));
    hitsSpinBox->setMinimum(1);
    hitsSpinBox->setMaximum(100);
    hitsSpinBox->setSingleStep(10);

    QPushButton *startQueryButton = new QPushButton(tr("Start query"));

    QGridLayout *packagesLayout = new QGridLayout;
    packagesLayout->addWidget(nameLabel, 0, 0);
    packagesLayout->addWidget(nameEdit, 0, 1);
    packagesLayout->addWidget(dateLabel, 1, 0);
    packagesLayout->addWidget(dateEdit, 1, 1);
    packagesLayout->addWidget(releasesCheckBox, 2, 0);
    packagesLayout->addWidget(upgradesCheckBox, 3, 0);
    packagesLayout->addWidget(hitsSpinBox, 4, 0, 1, 2);
    packagesGroup->setLayout(packagesLayout);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(packagesGroup);
    mainLayout->addSpacing(12);
    mainLayout->addWidget(startQueryButton);
    mainLayout->addStretch(1);
    setLayout(mainLayout);
}

ConfigDialog.h

#ifndef CONFIGDIALOG_H
#define CONFIGDIALOG_H

#include <QDialog>

QT_BEGIN_NAMESPACE
class QListWidget;
class QListWidgetItem;
class QStackedWidget;
QT_END_NAMESPACE

class ConfigDialog : public QDialog
{
    Q_OBJECT

public:
    ConfigDialog();

public slots:
    void changePage(QListWidgetItem *current, QListWidgetItem *previous);

private:
    void createIcons();

    QListWidget *contentsWidget;
    QStackedWidget *pagesWidget;
};

#endif

ConfigDialog.cpp

#include <QtGui>

#include "configdialog.h"
#include "pages.h"

ConfigDialog::ConfigDialog()
{
    contentsWidget = new QListWidget;
    contentsWidget->setViewMode(QListView::IconMode);
    contentsWidget->setIconSize(QSize(96, 84));
    contentsWidget->setMovement(QListView::Static);
    contentsWidget->setMaximumWidth(128);
    contentsWidget->setSpacing(12);

    pagesWidget = new QStackedWidget;
    pagesWidget->addWidget(new ConfigurationPage);
    pagesWidget->addWidget(new UpdatePage);
    pagesWidget->addWidget(new QueryPage);

    QPushButton *closeButton = new QPushButton(tr("Close"));

    createIcons();
    contentsWidget->setCurrentRow(0);

    connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));

    QHBoxLayout *horizontalLayout = new QHBoxLayout;
    horizontalLayout->addWidget(contentsWidget);
    horizontalLayout->addWidget(pagesWidget, 1);

    QHBoxLayout *buttonsLayout = new QHBoxLayout;
    buttonsLayout->addStretch(1);
    buttonsLayout->addWidget(closeButton);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addLayout(horizontalLayout);
    mainLayout->addStretch(1);
    mainLayout->addSpacing(12);
    mainLayout->addLayout(buttonsLayout);
    setLayout(mainLayout);

    setWindowTitle(tr("Config Dialog"));
}

void ConfigDialog::createIcons()
{
    QListWidgetItem *configButton = new QListWidgetItem(contentsWidget);
    configButton->setIcon(QIcon(":/images/config.png"));
    configButton->setText(tr("Configuration"));
    configButton->setTextAlignment(Qt::AlignHCenter);
    configButton->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

    QListWidgetItem *updateButton = new QListWidgetItem(contentsWidget);
    updateButton->setIcon(QIcon(":/images/update.png"));
    updateButton->setText(tr("Update"));
    updateButton->setTextAlignment(Qt::AlignHCenter);
    updateButton->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

    QListWidgetItem *queryButton = new QListWidgetItem(contentsWidget);
    queryButton->setIcon(QIcon(":/images/query.png"));
    queryButton->setText(tr("Query"));
    queryButton->setTextAlignment(Qt::AlignHCenter);
    queryButton->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

    connect(contentsWidget,
            SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),
            this, SLOT(changePage(QListWidgetItem*,QListWidgetItem*)));
}

void ConfigDialog::changePage(QListWidgetItem *current, QListWidgetItem *previous)
{
    if (!current)
        current = previous;

    pagesWidget->setCurrentIndex(contentsWidget->row(current));
}

main.cpp

#include <QApplication>

#include "configdialog.h"

int main(int argc, char *argv[])
{
    Q_INIT_RESOURCE(configdialog);

    QApplication app(argc, argv);
    ConfigDialog dialog;
    return dialog.exec();
}