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settings.cpp：源码内容
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#include "settings.h"
#include "browserapplication.h"
#include "browsermainwindow.h"
#include "cookiejar.h"
#include "history.h"
#include "networkaccessmanager.h"
#include "webview.h"
#include <QtCore/QSettings>
#include <QtGui/QtGui>
#include <QtWebKit/QtWebKit>
SettingsDialog::SettingsDialog(QWidget *parent)
    : QDialog(parent)
{
    setupUi(this);
    connect(exceptionsButton, SIGNAL(clicked()), this, SLOT(showExceptions()));
    connect(setHomeToCurrentPageButton, SIGNAL(clicked()), this, SLOT(setHomeToCurrentPage()));
    connect(cookiesButton, SIGNAL(clicked()), this, SLOT(showCookies()));
    connect(standardFontButton, SIGNAL(clicked()), this, SLOT(chooseFont()));
    connect(fixedFontButton, SIGNAL(clicked()), this, SLOT(chooseFixedFont()));
    loadDefaults();
    loadFromSettings();
}
void SettingsDialog::loadDefaults()
{
    QWebSettings *defaultSettings = QWebSettings::globalSettings();
    QString standardFontFamily = defaultSettings->fontFamily(QWebSettings::StandardFont);
    int standardFontSize = defaultSettings->fontSize(QWebSettings::DefaultFontSize);
    standardFont = QFont(standardFontFamily, standardFontSize);
    standardLabel->setText(QString(QLatin1String("%1 %2")).arg(standardFont.family()).arg(standardFont.pointSize()));
    QString fixedFontFamily = defaultSettings->fontFamily(QWebSettings::FixedFont);
    int fixedFontSize = defaultSettings->fontSize(QWebSettings::DefaultFixedFontSize);
    fixedFont = QFont(fixedFontFamily, fixedFontSize);
    fixedLabel->setText(QString(QLatin1String("%1 %2")).arg(fixedFont.family()).arg(fixedFont.pointSize()));
    downloadsLocation->setText(QDesktopServices::storageLocation(QDesktopServices::DesktopLocation));
    enableJavascript->setChecked(defaultSettings->testAttribute(QWebSettings::JavascriptEnabled));
    enablePlugins->setChecked(defaultSettings->testAttribute(QWebSettings::PluginsEnabled));
}
void SettingsDialog::loadFromSettings()
{
    QSettings settings;
    settings.beginGroup(QLatin1String("MainWindow"));
    QString defaultHome = QLatin1String("http://www.trolltech.com");
    homeLineEdit->setText(settings.value(QLatin1String("home"), defaultHome).toString());
    settings.endGroup();
    settings.beginGroup(QLatin1String("history"));
    int historyExpire = settings.value(QLatin1String("historyExpire")).toInt();
    int idx = 0;
    switch (historyExpire) {
    case 1: idx = 0; break;
    case 7: idx = 1; break;
    case 14: idx = 2; break;
    case 30: idx = 3; break;
    case 365: idx = 4; break;
    case -1: idx = 5; break;
    default:
        idx = 5;
    }
    expireHistory->setCurrentIndex(idx);
    settings.endGroup();
    settings.beginGroup(QLatin1String("downloadmanager"));
    QString downloadDirectory = settings.value(QLatin1String("downloadDirectory"), downloadsLocation->text()).toString();
    downloadsLocation->setText(downloadDirectory);
    settings.endGroup();
    settings.beginGroup(QLatin1String("general"));
    openLinksIn->setCurrentIndex(settings.value(QLatin1String("openLinksIn"), openLinksIn->currentIndex()).toInt());
    settings.endGroup();
    // Appearance
    settings.beginGroup(QLatin1String("websettings"));
    fixedFont = qVariantValue<QFont>(settings.value(QLatin1String("fixedFont"), fixedFont));
    standardFont = qVariantValue<QFont>(settings.value(QLatin1String("standardFont"), standardFont));
    standardLabel->setText(QString(QLatin1String("%1 %2")).arg(standardFont.family()).arg(standardFont.pointSize()));
    fixedLabel->setText(QString(QLatin1String("%1 %2")).arg(fixedFont.family()).arg(fixedFont.pointSize()));
    enableJavascript->setChecked(settings.value(QLatin1String("enableJavascript"), enableJavascript->isChecked()).toBool());
    enablePlugins->setChecked(settings.value(QLatin1String("enablePlugins"), enablePlugins->isChecked()).toBool());
    userStyleSheet->setText(settings.value(QLatin1String("userStyleSheet")).toUrl().toString());
    settings.endGroup();
    // Privacy
    settings.beginGroup(QLatin1String("cookies"));
    CookieJar *jar = BrowserApplication::cookieJar();
    QByteArray value = settings.value(QLatin1String("acceptCookies"), QLatin1String("AcceptOnlyFromSitesNavigatedTo")).toByteArray();
    QMetaEnum acceptPolicyEnum = jar->staticMetaObject.enumerator(jar->staticMetaObject.indexOfEnumerator("AcceptPolicy"));
    CookieJar::AcceptPolicy acceptCookies = acceptPolicyEnum.keyToValue(value) == -1 ?
                        CookieJar::AcceptOnlyFromSitesNavigatedTo :
                        static_cast<CookieJar::AcceptPolicy>(acceptPolicyEnum.keyToValue(value));
    switch(acceptCookies) {
    case CookieJar::AcceptAlways:
        acceptCombo->setCurrentIndex(0);
        break;
    case CookieJar::AcceptNever:
        acceptCombo->setCurrentIndex(1);
        break;
    case CookieJar::AcceptOnlyFromSitesNavigatedTo:
        acceptCombo->setCurrentIndex(2);
        break;
    }
    value = settings.value(QLatin1String("keepCookiesUntil"), QLatin1String("Expire")).toByteArray();
    QMetaEnum keepPolicyEnum = jar->staticMetaObject.enumerator(jar->staticMetaObject.indexOfEnumerator("KeepPolicy"));
    CookieJar::KeepPolicy keepCookies = keepPolicyEnum.keyToValue(value) == -1 ?
                        CookieJar::KeepUntilExpire :
                        static_cast<CookieJar::KeepPolicy>(keepPolicyEnum.keyToValue(value));
    switch(keepCookies) {
    case CookieJar::KeepUntilExpire:
        keepUntilCombo->setCurrentIndex(0);
        break;
    case CookieJar::KeepUntilExit:
        keepUntilCombo->setCurrentIndex(1);
        break;
    case CookieJar::KeepUntilTimeLimit:
        keepUntilCombo->setCurrentIndex(2);
        break;
    }
    settings.endGroup();
    // Proxy
    settings.beginGroup(QLatin1String("proxy"));
    proxySupport->setChecked(settings.value(QLatin1String("enabled"), false).toBool());
    proxyType->setCurrentIndex(settings.value(QLatin1String("type"), 0).toInt());
    proxyHostName->setText(settings.value(QLatin1String("hostName")).toString());
    proxyPort->setValue(settings.value(QLatin1String("port"), 1080).toInt());
    proxyUserName->setText(settings.value(QLatin1String("userName")).toString());
    proxyPassword->setText(settings.value(QLatin1String("password")).toString());
    settings.endGroup();
}
void SettingsDialog::saveToSettings()
{
    QSettings settings;
    settings.beginGroup(QLatin1String("MainWindow"));
    settings.setValue(QLatin1String("home"), homeLineEdit->text());
    settings.endGroup();
    settings.beginGroup(QLatin1String("general"));
    settings.setValue(QLatin1String("openLinksIn"), openLinksIn->currentIndex());
    settings.endGroup();
    settings.beginGroup(QLatin1String("history"));
    int historyExpire = expireHistory->currentIndex();
    int idx = -1;
    switch (historyExpire) {
    case 0: idx = 1; break;
    case 1: idx = 7; break;
    case 2: idx = 14; break;
    case 3: idx = 30; break;
    case 4: idx = 365; break;
    case 5: idx = -1; break;
    }
    settings.setValue(QLatin1String("historyExpire"), idx);
    settings.endGroup();
    // Appearance
    settings.beginGroup(QLatin1String("websettings"));
    settings.setValue(QLatin1String("fixedFont"), fixedFont);
    settings.setValue(QLatin1String("standardFont"), standardFont);
    settings.setValue(QLatin1String("enableJavascript"), enableJavascript->isChecked());
    settings.setValue(QLatin1String("enablePlugins"), enablePlugins->isChecked());
    QString userStyleSheetString = userStyleSheet->text();
    if (QFile::exists(userStyleSheetString))
        settings.setValue(QLatin1String("userStyleSheet"), QUrl::fromLocalFile(userStyleSheetString));
    else
        settings.setValue(QLatin1String("userStyleSheet"), QUrl(userStyleSheetString));
    settings.endGroup();
    //Privacy
    settings.beginGroup(QLatin1String("cookies"));
    CookieJar::KeepPolicy keepCookies;
    switch(acceptCombo->currentIndex()) {
    default:
    case 0:
        keepCookies = CookieJar::KeepUntilExpire;
        break;
    case 1:
        keepCookies = CookieJar::KeepUntilExit;
        break;
    case 2:
        keepCookies = CookieJar::KeepUntilTimeLimit;
        break;
    }
    CookieJar *jar = BrowserApplication::cookieJar();
    QMetaEnum acceptPolicyEnum = jar->staticMetaObject.enumerator(jar->staticMetaObject.indexOfEnumerator("AcceptPolicy"));
    settings.setValue(QLatin1String("acceptCookies"), QLatin1String(acceptPolicyEnum.valueToKey(keepCookies)));
    CookieJar::KeepPolicy keepPolicy;
    switch(keepUntilCombo->currentIndex()) {
        default:
    case 0:
        keepPolicy = CookieJar::KeepUntilExpire;
        break;
    case 1:
        keepPolicy = CookieJar::KeepUntilExit;
        break;
    case 2:
        keepPolicy = CookieJar::KeepUntilTimeLimit;
        break;
    }
    QMetaEnum keepPolicyEnum = jar->staticMetaObject.enumerator(jar->staticMetaObject.indexOfEnumerator("KeepPolicy"));
    settings.setValue(QLatin1String("keepCookiesUntil"), QLatin1String(keepPolicyEnum.valueToKey(keepPolicy)));
    settings.endGroup();
    // proxy
    settings.beginGroup(QLatin1String("proxy"));
    settings.setValue(QLatin1String("enabled"), proxySupport->isChecked());
    settings.setValue(QLatin1String("type"), proxyType->currentIndex());
    settings.setValue(QLatin1String("hostName"), proxyHostName->text());
    settings.setValue(QLatin1String("port"), proxyPort->text());
    settings.setValue(QLatin1String("userName"), proxyUserName->text());
    settings.setValue(QLatin1String("password"), proxyPassword->text());
    settings.endGroup();
    BrowserApplication::instance()->loadSettings();
    BrowserApplication::networkAccessManager()->loadSettings();
    BrowserApplication::cookieJar()->loadSettings();
    BrowserApplication::historyManager()->loadSettings();
}
void SettingsDialog::accept()
{
    saveToSettings();
    QDialog::accept();
}
void SettingsDialog::showCookies()
{
    CookiesDialog *dialog = new CookiesDialog(BrowserApplication::cookieJar(), this);
    dialog->exec();
}
void SettingsDialog::showExceptions()
{
    CookiesExceptionsDialog *dialog = new CookiesExceptionsDialog(BrowserApplication::cookieJar(), this);
    dialog->exec();
}
void SettingsDialog::chooseFont()
{
    bool ok;
    QFont font = QFontDialog::getFont(&ok, standardFont, this);
    if ( ok ) {
        standardFont = font;
        standardLabel->setText(QString(QLatin1String("%1 %2")).arg(font.family()).arg(font.pointSize()));
    }
}
void SettingsDialog::chooseFixedFont()
{
    bool ok;
    QFont font = QFontDialog::getFont(&ok, fixedFont, this);
    if ( ok ) {
        fixedFont = font;
        fixedLabel->setText(QString(QLatin1String("%1 %2")).arg(font.family()).arg(font.pointSize()));
    }
}
void SettingsDialog::setHomeToCurrentPage()
{
    BrowserMainWindow *mw = static_cast<BrowserMainWindow*>(parent());
    WebView *webView = mw->currentTab();
    if (webView)
        homeLineEdit->setText(webView->url().toString());
}

						