source: trunk/examples/tools/settingseditor/settingstree.cpp@ 315

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#include <QtGui>

#include "settingstree.h"
#include "variantdelegate.h"

SettingsTree::SettingsTree(QWidget *parent)
    : QTreeWidget(parent)
{
    setItemDelegate(new VariantDelegate(this));

    QStringList labels;
    labels << tr("Setting") << tr("Type") << tr("Value");
    setHeaderLabels(labels);
    header()->setResizeMode(0, QHeaderView::Stretch);
    header()->setResizeMode(2, QHeaderView::Stretch);

    settings = 0;
    refreshTimer.setInterval(2000);
    autoRefresh = false;

    groupIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirClosedIcon),
                        QIcon::Normal, QIcon::Off);
    groupIcon.addPixmap(style()->standardPixmap(QStyle::SP_DirOpenIcon),
                        QIcon::Normal, QIcon::On);
    keyIcon.addPixmap(style()->standardPixmap(QStyle::SP_FileIcon));

    connect(&refreshTimer, SIGNAL(timeout()), this, SLOT(maybeRefresh()));
}

void SettingsTree::setSettingsObject(QSettings *settings)
{
    delete this->settings;
    this->settings = settings;
    clear();

    if (settings) {
        settings->setParent(this);
        refresh();
        if (autoRefresh)
            refreshTimer.start();
    } else {
        refreshTimer.stop();
    }
}

QSize SettingsTree::sizeHint() const
{
    return QSize(800, 600);
}

void SettingsTree::setAutoRefresh(bool autoRefresh)
{
    this->autoRefresh = autoRefresh;
    if (settings) {
        if (autoRefresh) {
            maybeRefresh();
            refreshTimer.start();
        } else {
            refreshTimer.stop();
        }
    }
}

void SettingsTree::setFallbacksEnabled(bool enabled)
{
    if (settings) {
        settings->setFallbacksEnabled(enabled);
        refresh();
    }
}

void SettingsTree::maybeRefresh()
{
    if (state() != EditingState)
        refresh();
}

void SettingsTree::refresh()
{
    if (!settings)
        return;

    disconnect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),
               this, SLOT(updateSetting(QTreeWidgetItem *)));

    settings->sync();
    updateChildItems(0);

    connect(this, SIGNAL(itemChanged(QTreeWidgetItem *, int)),
            this, SLOT(updateSetting(QTreeWidgetItem *)));
}

bool SettingsTree::event(QEvent *event)
{
    if (event->type() == QEvent::WindowActivate) {
        if (isActiveWindow() && autoRefresh)
            maybeRefresh();
    }
    return QTreeWidget::event(event);
}

void SettingsTree::updateSetting(QTreeWidgetItem *item)
{
    QString key = item->text(0);
    QTreeWidgetItem *ancestor = item->parent();
    while (ancestor) {
        key.prepend(ancestor->text(0) + "/");
        ancestor = ancestor->parent();
    }

    settings->setValue(key, item->data(2, Qt::UserRole));