From aa39bb192fed347a166e0b51c0c36c730f898ae4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20Gr=C3=A4=C3=9Flin?= <mgraesslin@kde.org>
Date: Mon, 2 Dec 2013 11:26:37 +0100
Subject: [PATCH] Connect changed from QML to the C++ side

Connected in the view and further emited as a signal our KCM
connects to.
---
 kcmkwin/kwincompositing/main.cpp  | 3 +++
 kcmkwin/kwincompositing/model.cpp | 2 ++
 kcmkwin/kwincompositing/model.h   | 2 ++
 3 files changed, 7 insertions(+)

diff --git a/kcmkwin/kwincompositing/main.cpp b/kcmkwin/kwincompositing/main.cpp
index 2bd2b58d5c..0df802446a 100644
--- a/kcmkwin/kwincompositing/main.cpp
+++ b/kcmkwin/kwincompositing/main.cpp
@@ -55,6 +55,9 @@ KWinCompositingKCM::KWinCompositingKCM(QWidget* parent, const QVariantList& args
     setLayout(vl);
     m_view->setWidth(width());
     m_view->setHeight(height());
+    connect(m_view.data(), &KWin::Compositing::EffectView::changed, [this]{
+        emit changed(true);
+    });
 }
 
 KWinCompositingKCM::~KWinCompositingKCM()
diff --git a/kcmkwin/kwincompositing/model.cpp b/kcmkwin/kwincompositing/model.cpp
index be2f52d61b..2aa757f201 100644
--- a/kcmkwin/kwincompositing/model.cpp
+++ b/kcmkwin/kwincompositing/model.cpp
@@ -39,6 +39,7 @@
 #include <QString>
 #include <QQmlEngine>
 #include <QtQml>
+#include <QQuickItem>
 #include <QDebug>
 
 namespace KWin {
@@ -371,6 +372,7 @@ void EffectView::init()
     setResizeMode(QQuickView::SizeRootObjectToView);
     rootContext()->setContextProperty("engine", this);
     setSource(QUrl(mainFile));
+    connect(rootObject(), SIGNAL(changed()), this, SIGNAL(changed()));
 }
 
 }//end namespace Compositing
diff --git a/kcmkwin/kwincompositing/model.h b/kcmkwin/kwincompositing/model.h
index 78426953fe..18ebfeb4c0 100644
--- a/kcmkwin/kwincompositing/model.h
+++ b/kcmkwin/kwincompositing/model.h
@@ -103,6 +103,8 @@ public:
 
     Q_INVOKABLE QColor backgroundViewColor() { return KColorScheme(QPalette::Active, KColorScheme::Window, KSharedConfigPtr(0)).background(KColorScheme::NormalBackground).color(); };
 
+Q_SIGNALS:
+    void changed();
 };