Rename ThemeSettingsWidget -> ThemeChooser

Change-Id: Ie61dc07d9f8bc8639ff80368a0b2ad4dd62cacb3
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/coreplugin/themechooser.cpp

@@ -0,0 +1,230 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 Thorben Kroeger <thorbenkroeger@gmail.com>.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** 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 https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "coreconstants.h"
+#include "icore.h"
+#include "manhattanstyle.h"
+#include "themechooser.h"
+
+#include <utils/algorithm.h>
+#include <utils/theme/theme.h>
+#include <utils/theme/theme_p.h>
+
+#include <QAbstractListModel>
+#include <QComboBox>
+#include <QCoreApplication>
+#include <QDebug>
+#include <QDir>
+#include <QHBoxLayout>
+#include <QMessageBox>
+#include <QSettings>
+#include <QSpacerItem>
+
+using namespace Utils;
+
+static const char themeNameKey[] = "ThemeName";
+
+namespace Core {
+namespace Internal {
+
+ThemeEntry::ThemeEntry(Id id, const QString &filePath)
+    : m_id(id)
+    , m_filePath(filePath)
+{
+}
+
+Id ThemeEntry::id() const
+{
+    return m_id;
+}
+
+QString ThemeEntry::displayName() const
+{
+    if (m_displayName.isEmpty() && !m_filePath.isEmpty()) {
+        QSettings settings(m_filePath, QSettings::IniFormat);
+        m_displayName = settings.value(QLatin1String(themeNameKey),
+                                       QCoreApplication::tr("unnamed")).toString();
+    }
+    return m_displayName;
+}
+
+QString ThemeEntry::filePath() const
+{
+    return m_filePath;
+}
+
+class ThemeListModel : public QAbstractListModel
+{
+public:
+    ThemeListModel(QObject *parent = 0):
+        QAbstractListModel(parent)
+    {
+    }
+
+    int rowCount(const QModelIndex &parent) const
+    {
+        return parent.isValid() ? 0 : m_themes.size();
+    }
+
+    QVariant data(const QModelIndex &index, int role) const
+    {
+        if (role == Qt::DisplayRole)
+            return m_themes.at(index.row()).displayName();
+        return QVariant();
+    }
+
+    void removeTheme(int index)
+    {
+        beginRemoveRows(QModelIndex(), index, index);
+        m_themes.removeAt(index);
+        endRemoveRows();
+    }
+
+    void setThemes(const QList<ThemeEntry> &themes)
+    {
+        beginResetModel();
+        m_themes = themes;
+        endResetModel();
+    }
+
+    const ThemeEntry &themeAt(int index) const
+    {
+        return m_themes.at(index);
+    }
+
+private:
+    QList<ThemeEntry> m_themes;
+};
+
+
+class ThemeChooserPrivate
+{
+public:
+    ThemeChooserPrivate(QWidget *widget);
+    ~ThemeChooserPrivate();
+
+public:
+    ThemeListModel *m_themeListModel;
+    QComboBox *m_themeComboBox;
+    bool m_refreshingThemeList;
+};
+
+ThemeChooserPrivate::ThemeChooserPrivate(QWidget *widget)
+    : m_themeListModel(new ThemeListModel)
+    , m_themeComboBox(new QComboBox)
+    , m_refreshingThemeList(false)
+{
+    QHBoxLayout *layout = new QHBoxLayout(widget);
+    layout->addWidget(m_themeComboBox);
+    layout->setMargin(0);
+    auto horizontalSpacer = new QSpacerItem(40, 20, QSizePolicy::Expanding, QSizePolicy::Minimum);
+    layout->addSpacerItem(horizontalSpacer);
+    m_themeComboBox->setModel(m_themeListModel);
+}
+
+ThemeChooserPrivate::~ThemeChooserPrivate()
+{
+    delete m_themeListModel;
+}
+
+ThemeChooser::ThemeChooser(QWidget *parent) :
+    QWidget(parent)
+{
+    d = new ThemeChooserPrivate(this);
+
+    refreshThemeList();
+}
+
+ThemeChooser::~ThemeChooser()
+{
+    delete d;
+}
+
+void ThemeChooser::refreshThemeList()
+{
+    const QList<ThemeEntry> themes = ThemeEntry::availableThemes();
+    const int selected = Utils::indexOf(themes, Utils::equal(&ThemeEntry::id,
+                                                             Id::fromString(creatorTheme()->id())));
+
+    d->m_refreshingThemeList = true;
+    d->m_themeListModel->setThemes(themes);
+    if (selected >= 0)
+        d->m_themeComboBox->setCurrentIndex(selected);
+    d->m_refreshingThemeList = false;
+}
+
+void ThemeChooser::apply()
+{
+    const int index = d->m_themeComboBox->currentIndex();
+    if (index == -1)
+        return;
+    const QString themeId = d->m_themeListModel->themeAt(index).id().toString();
+    QSettings *settings = ICore::settings();
+    const QString currentThemeId = settings->value(QLatin1String(Constants::SETTINGS_THEME),
+                                                   QLatin1String("default")).toString();
+    if (currentThemeId != themeId) {
+        QMessageBox::information(ICore::mainWindow(), tr("Restart Required"),
+                                 tr("The theme change will take effect after a restart of Qt Creator."));
+
+        // save filename of selected theme in global config
+        settings->setValue(QLatin1String(Constants::SETTINGS_THEME), themeId);
+    }
+}
+
+static void addThemesFromPath(const QString &path, QList<ThemeEntry> *themes)
+{
+    static const QLatin1String extension("*.creatortheme");
+    QDir themeDir(path);
+    themeDir.setNameFilters(QStringList() << extension);
+    themeDir.setFilter(QDir::Files);
+    const QStringList themeList = themeDir.entryList();
+    foreach (const QString &fileName, themeList) {
+        QString id = QFileInfo(fileName).completeBaseName();
+        themes->append(ThemeEntry(Id::fromString(id), themeDir.absoluteFilePath(fileName)));
+    }
+}
+
+QList<ThemeEntry> ThemeEntry::availableThemes()
+{
+    QList<ThemeEntry> themes;
+
+    static const QString installThemeDir = ICore::resourcePath() + QLatin1String("/themes");
+    static const QString userThemeDir = ICore::userResourcePath() + QLatin1String("/themes");
+    addThemesFromPath(installThemeDir, &themes);
+    if (themes.isEmpty())
+        qWarning() << "Warning: No themes found in installation: "
+                   << QDir::toNativeSeparators(installThemeDir);
+    // move default theme to front
+    int defaultIndex = Utils::indexOf(themes, Utils::equal(&ThemeEntry::id, Id("default")));
+    if (defaultIndex > 0) { // == exists and not at front
+        ThemeEntry defaultEntry = themes.takeAt(defaultIndex);
+        themes.prepend(defaultEntry);
+    }
+    addThemesFromPath(userThemeDir, &themes);
+    return themes;
+}
+
+} // namespace Internal
+} // namespace Core