settingsviewer.cpp

QT4 gui programming的随书光盘

#include <QtGui>

#include "settingsviewer.h"

SettingsViewer::SettingsViewer(QWidget *parent)
    : QDialog(parent)
{
    organization = "Trolltech";
    application = "Designer";

    treeWidget = new QTreeWidget;
    treeWidget->setColumnCount(2);
    treeWidget->setHeaderLabels(
            QStringList() << tr("Key") << tr("Value"));
    treeWidget->header()->setResizeMode(0, QHeaderView::Stretch);
    treeWidget->header()->setResizeMode(1, QHeaderView::Stretch);

    buttonBox = new QDialogButtonBox(QDialogButtonBox::Open
                                     | QDialogButtonBox::Close);

    connect(buttonBox, SIGNAL(accepted()), this, SLOT(open()));
    connect(buttonBox, SIGNAL(rejected()), this, SLOT(close()));

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addWidget(treeWidget);
    mainLayout->addWidget(buttonBox);
    setLayout(mainLayout);

    setWindowTitle(tr("Settings Viewer"));
    readSettings();
}

void SettingsViewer::open()
{
    QDialog dialog(this);

    QLabel *orgLabel = new QLabel(tr("&Organization:"));
    QLineEdit *orgLineEdit = new QLineEdit(organization);
    orgLabel->setBuddy(orgLineEdit);

    QLabel *appLabel = new QLabel(tr("&Application:"));
    QLineEdit *appLineEdit = new QLineEdit(application);
    appLabel->setBuddy(appLineEdit);

    QDialogButtonBox *buttonBox = new QDialogButtonBox(
            QDialogButtonBox::Ok | QDialogButtonBox::Cancel);

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

    QGridLayout *gridLayout = new QGridLayout;
    gridLayout->addWidget(orgLabel, 0, 0);
    gridLayout->addWidget(orgLineEdit, 0, 1);
    gridLayout->addWidget(appLabel, 1, 0);
    gridLayout->addWidget(appLineEdit, 1, 1);

    QVBoxLayout *mainLayout = new QVBoxLayout;
    mainLayout->addLayout(gridLayout);
    mainLayout->addWidget(buttonBox);
    dialog.setLayout(mainLayout);

    dialog.setWindowTitle(tr("Choose Settings"));

    if (dialog.exec()) {
        organization = orgLineEdit->text();
        application = appLineEdit->text();
        readSettings();
    }
}

void SettingsViewer::readSettings()
{
    QSettings settings(organization, application);

    treeWidget->clear();
    addChildSettings(settings, 0, "");

    treeWidget->sortByColumn(0);
    treeWidget->setFocus();
    setWindowTitle(tr("Settings Viewer - %1 by %2")
                   .arg(application).arg(organization));
}

void SettingsViewer::addChildSettings(QSettings &settings,
        QTreeWidgetItem *parent, const QString &group)
{
    if (!parent)
        parent = treeWidget->invisibleRootItem();
    QTreeWidgetItem *item;

    settings.beginGroup(group);

    foreach (QString key, settings.childKeys()) {
        item = new QTreeWidgetItem(parent);
        item->setText(0, key);
        item->setText(1, settings.value(key).toString());
    }
    foreach (QString group, settings.childGroups()) {
        item = new QTreeWidgetItem(parent);
        item->setText(0, group);
        addChildSettings(settings, item, group);
    }
    settings.endGroup();
}