added alternativeshelper class from plasma

app/CMakeLists.txt

@@ -24,6 +24,7 @@ set(lattedock-app_SRCS
     dockconfigview.cpp
     packageplugins/shell/dockpackage.cpp
     panelshadows.cpp
+    alternativeshelper.cpp
     main.cpp
 )
 

app/alternativeshelper.cpp

@@ -0,0 +1,100 @@
+/*
+ *   Copyright 2014 Marco Martin <mart@kde.org>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as
+ *   published by the Free Software Foundation; either version 2, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+
+#include "alternativeshelper.h"
+
+#include <QQmlEngine>
+#include <QQmlContext>
+
+#include <Plasma/Containment>
+#include <Plasma/PluginLoader>
+#include <KPackage/Package>
+#include <kconfig_version.h>
+
+AlternativesHelper::AlternativesHelper(Plasma::Applet *applet, QObject *parent)
+    : QObject(parent),
+      m_applet(applet)
+{
+}
+
+AlternativesHelper::~AlternativesHelper()
+{
+}
+
+QStringList AlternativesHelper::appletProvides() const
+{
+#if KCONFIG_VERSION_MINOR >= 27
+    return KPluginMetaData::readStringList(m_applet->pluginMetaData().rawData(), QStringLiteral("X-Plasma-Provides"));
+#else
+    return KPluginMetaData::readStringList(m_applet->pluginInfo().toMetaData().rawData(), QStringLiteral("X-Plasma-Provides"));
+#endif
+}
+
+QString AlternativesHelper::currentPlugin() const
+{
+#if KCONFIG_VERSION_MINOR >= 27
+    return m_applet->pluginMetaData().pluginId();
+#else
+    return m_applet->pluginInfo().toMetaData().pluginId();
+#endif
+}
+
+QQuickItem *AlternativesHelper::applet() const
+{
+    return m_applet->property("_plasma_graphicObject").value<QQuickItem *>();
+}
+
+void AlternativesHelper::loadAlternative(const QString &plugin)
+{
+    if (plugin == currentPlugin() || m_applet->isContainment()) {
+        return;
+    }
+
+    Plasma::Containment *cont = m_applet->containment();
+    if (!cont) {
+        return;
+    }
+
+    QQuickItem *appletItem = m_applet->property("_plasma_graphicObject").value<QQuickItem *>();
+    QQuickItem *contItem = cont->property("_plasma_graphicObject").value<QQuickItem *>();
+    if (!appletItem || !contItem) {
+        return;
+    }
+
+    // ensure the global shortcut is moved to the new applet
+    const QKeySequence &shortcut = m_applet->globalShortcut();
+    m_applet->setGlobalShortcut(QKeySequence()); // need to unmap the old one first
+
+    const QPoint newPos = appletItem->mapToItem(contItem, QPointF(0,0)).toPoint();
+
+    m_applet->destroy();
+
+    connect(m_applet, &QObject::destroyed, [=]() {
+        Plasma::Applet *newApplet = Q_NULLPTR;
+        QMetaObject::invokeMethod(contItem, "createApplet", Q_RETURN_ARG(Plasma::Applet *, newApplet), Q_ARG(QString, plugin), Q_ARG(QVariantList, QVariantList()), Q_ARG(QPoint, newPos));
+
+        if (newApplet) {
+            newApplet->setGlobalShortcut(shortcut);
+        }
+    });
+}
+
+#include "moc_alternativeshelper.cpp"
+

app/alternativeshelper.h

@@ -0,0 +1,48 @@
+/*
+ *   Copyright 2014 Marco Martin <mart@kde.org>
+ *
+ *   This program is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Library General Public License as
+ *   published by the Free Software Foundation; either version 2, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details
+ *
+ *   You should have received a copy of the GNU Library General Public
+ *   License along with this program; if not, write to the
+ *   Free Software Foundation, Inc.,
+ *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef ALTERNATIVESDIALOG_H
+#define ALTERNATIVESDIALOG_H
+
+#include <Plasma/Applet>
+
+#include <QQuickItem>
+
+class AlternativesHelper : public QObject
+{
+    Q_OBJECT
+    Q_PROPERTY(QStringList appletProvides READ appletProvides CONSTANT)
+    Q_PROPERTY(QString currentPlugin READ currentPlugin CONSTANT)
+    Q_PROPERTY(QQuickItem *applet READ applet CONSTANT)
+
+public:
+    AlternativesHelper(Plasma::Applet *applet, QObject *parent = 0);
+    ~AlternativesHelper() override;
+
+    QQuickItem *applet() const;
+    QStringList appletProvides() const;
+    QString currentPlugin() const;
+
+    Q_INVOKABLE void loadAlternative(const QString &plugin);
+
+private:
+    Plasma::Applet *m_applet;
+};
+
+#endif