1 files changed, 163 insertions, 0 deletions
diff --git a/src/quickcontrols2/qquicktheme.cpp b/src/quickcontrols2/qquicktheme.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls 2 module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquicktheme_p.h"
+#include "qquickstyle_p.h"
+
+#include <QtCore/qmetaobject.h>
+#include <QtCore/qsettings.h>
+
+#include <functional>
+
+QT_BEGIN_NAMESPACE
+
+#if QT_CONFIG(settings)
+static void readValue(const QSharedPointer<QSettings> &settings, const QString &name, std::function<void(const QVariant &)> setValue)
+{
+    const QVariant var = settings->value(name);
+    if (var.isValid())
+        setValue(var);
+}
+
+template <typename Enum>
+static Enum toEnumValue(const QVariant &var)
+{
+    // ### TODO: expose QFont enums to the meta object system using Q_ENUM
+    //QMetaEnum enumeration = QMetaEnum::fromType<Enum>();
+    //bool ok = false;
+    //int value = enumeration.keyToValue(var.toByteArray(), &ok);
+    //if (!ok)
+    //    value = var.toInt();
+    //return static_cast<Enum>(value);
+
+    return static_cast<Enum>(var.toInt());
+}
+
+QFont *readFont(const QSharedPointer<QSettings> &settings)
+{
+    const QVariant var = settings->value(QStringLiteral("Font"));
+    if (var.isValid())
+        return new QFont(var.value<QFont>());
+
+    QFont f;
+    settings->beginGroup(QStringLiteral("Font"));
+    readValue(settings, QStringLiteral("Family"), [&f](const QVariant &var) { f.setFamily(var.toString()); });
+    readValue(settings, QStringLiteral("PointSize"), [&f](const QVariant &var) { f.setPointSizeF(var.toReal()); });
+    readValue(settings, QStringLiteral("PixelSize"), [&f](const QVariant &var) { f.setPixelSize(var.toInt()); });
+    readValue(settings, QStringLiteral("StyleHint"), [&f](const QVariant &var) { f.setStyleHint(toEnumValue<QFont::StyleHint>(var.toInt())); });
+    readValue(settings, QStringLiteral("Weight"), [&f](const QVariant &var) { f.setWeight(toEnumValue<QFont::Weight>(var)); });
+    readValue(settings, QStringLiteral("Style"), [&f](const QVariant &var) { f.setStyle(toEnumValue<QFont::Style>(var.toInt())); });
+    settings->endGroup();
+    return new QFont(f);
+}
+
+static void readColorGroup(const QSharedPointer<QSettings> &settings, QPalette::ColorGroup group, QPalette *palette)
+{
+    const QStringList keys = settings->childKeys();
+    if (keys.isEmpty())
+        return;
+
+    static const int index = QPalette::staticMetaObject.indexOfEnumerator("ColorRole");
+    Q_ASSERT(index != -1);
+    QMetaEnum metaEnum = QPalette::staticMetaObject.enumerator(index);
+
+    for (const QString &key : keys) {
+        bool ok = false;
+        int role = metaEnum.keyToValue(key.toUtf8(), &ok);
+        if (ok)
+            palette->setColor(group, static_cast<QPalette::ColorRole>(role), settings->value(key).value<QColor>());
+    }
+}
+
+static QPalette *readPalette(const QSharedPointer<QSettings> &settings)
+{
+    QPalette p;
+    settings->beginGroup(QStringLiteral("Palette"));
+    readColorGroup(settings, QPalette::All, &p);
+
+    settings->beginGroup(QStringLiteral("Normal"));
+    readColorGroup(settings, QPalette::Normal, &p);
+    settings->endGroup();
+
+    settings->beginGroup(QStringLiteral("Disabled"));
+    readColorGroup(settings, QPalette::Disabled, &p);
+    settings->endGroup();
+    return new QPalette(p);
+}
+
+#endif // QT_CONFIG(settings)
+
+QQuickTheme::QQuickTheme(const QString &style)
+    : QQuickProxyTheme()
+{
+#if QT_CONFIG(settings)
+    QSharedPointer<QSettings> settings = QQuickStylePrivate::settings(style);
+    if (settings) {
+        m_styleFont.reset(readFont(settings));
+        m_stylePalette.reset(readPalette(settings));
+    }
+#endif
+}
+
+const QFont *QQuickTheme::font(Font type) const
+{
+    Q_UNUSED(type);
+    return m_styleFont.data();
+}
+
+const QPalette *QQuickTheme::palette(Palette type) const
+{
+    Q_UNUSED(type);
+    return m_stylePalette.data();
+}
+
+QFont QQuickTheme::resolveFont(const QFont &font) const
+{
+    if (!m_styleFont)
+        return font;
+
+    return m_styleFont->resolve(font);
+}
+
+QPalette QQuickTheme::resolvePalette(const QPalette &palette) const
+{
+    if (!m_stylePalette)
+        return palette;
+
+    return m_stylePalette->resolve(palette);
+}
+
+QT_END_NAMESPACE