122 lines
3.4 KiB
C++
Executable File
122 lines
3.4 KiB
C++
Executable File
/**
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* @RDE_HEADER@
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* Loads Style Plugins and unloads them to keep one resource file only
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* $Id$
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* $HeadURL$
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* $Author$
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*
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* Created by Mike Wille, NLSE, 2018-02-15
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*/
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#include "style_manager.h"
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#include <LtsPluginManager/lts_plugin_loader.h>
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#include <PluginInterfaces/style_plugin_interface.h>
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#include <QPluginLoader>
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#include <QDebug>
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namespace LtsUtils
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{
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struct StyleManagerHandler
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{
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StyleManager styleManager;
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};
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Q_GLOBAL_STATIC(StyleManagerHandler, s_styleManagerHandler)
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StyleManager *StyleManager::getInstance()
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{
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return &s_styleManagerHandler->styleManager;
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}
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bool StyleManager::loadStyle(const QString &stylePluginName, bool highDpi)
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{
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if (m_currentStylePluginLoader != nullptr) // a style was already loaded - unload first
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{
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//qWarning() << "StyleManager::loadStyle: style" << m_currentStylePluginLoader->instance()->metaObject()->className() << "already loaded - unloading";
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QObject *pluginInstance = m_currentStylePluginLoader->instance();
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StylePlugin::Plugin *sp = qobject_cast<StylePlugin::Plugin *>(pluginInstance);
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if (sp == nullptr)
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{
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qWarning() << "StyleManager::loadStyle: could not unload style plugin - wrong type ("
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<< pluginInstance->metaObject()->className() << ") - new style not loaded";
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return false;
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}
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sp->unloadStyle();
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// Do not do the job of the LtsPluginLoader
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// delete sp;
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// if (!m_currentStylePluginLoader->unload())
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// {
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// qWarning() << "StyleManager::loadStyle: could not unload old style" << m_currentStylePluginLoader->errorString();
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// }
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m_currentStylePluginLoader = nullptr;
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}
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// load new plugin
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LtsPluginManager::LtsPluginLoader *pluginLoader = LtsPluginManager::LtsPluginLoader::getInstance();
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QPluginLoader *stylePluginLoader = nullptr;
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int pluginsLoaded = 0;
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std::function<bool(const LtsPluginManager::PluginInstance &pi)> loadPluginFn = [&stylePluginLoader, &pluginsLoaded]
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(const LtsPluginManager::PluginInstance &pi)
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{
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stylePluginLoader = pi.pluginLoader;
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pluginsLoaded++;
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return true;
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};
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if (!pluginLoader->loadPlugins(LtsPluginManager::PluginType::STYLE, loadPluginFn, QStringList() << stylePluginName))
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{
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qWarning() << "StyleManager::loadStyle: Error loading Style Plugin - using default Qt style";
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return false;
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}
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if (pluginsLoaded == 0)
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{
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qWarning() << "StyleManager::loadStyle: Could not find Style Plugin" << stylePluginName << "- using default Qt style";
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return false;
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}
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if (pluginsLoaded > 1)
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{
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qWarning() << "StyleManager::loadStyle: Style Plugin" << stylePluginName << " is ambiguous - using default Qt style";
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return false;
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}
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if (stylePluginLoader == nullptr)
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{
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qWarning() << "StyleManager::loadStyle: No Style Plugin loader available - using default Qt style";
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return false;
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}
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StylePlugin::Plugin *sp = qobject_cast<StylePlugin::Plugin *>(stylePluginLoader->instance());
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if (sp == nullptr)
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{
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qWarning() << "StyleManager::loadStyle: could not load style plugin - wrong type ("
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<< stylePluginLoader->instance()->metaObject()->className() << ") - new style not loaded";
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return false;
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}
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sp->loadStyle(highDpi);
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m_currentStylePluginLoader = stylePluginLoader;
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m_stylePluginName = stylePluginName;
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emit signalStyleChanged(stylePluginName);
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return true;
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}
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} // namespace LtsUtils
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