[Qt] Use MapChangeWillStartLoadingMap to get notified about style changes

3 files changed, 23 insertions, 3 deletions

diff --git a/platform/qt/src/qquickmapboxgl.cpp b/platform/qt/src/qquickmapboxgl.cpp
index 6d90a4aeae..b80b343d35 100644
--- a/platform/qt/src/qquickmapboxgl.cpp
+++ b/platform/qt/src/qquickmapboxgl.cpp
@@ -23,7 +23,9 @@ QQuickMapboxGL::~QQuickMapboxGL()
 
 QQuickFramebufferObject::Renderer *QQuickMapboxGL::createRenderer() const
 {
-    return new QQuickMapboxGLRenderer();
+    QQuickMapboxGLRenderer *renderer = new QQuickMapboxGLRenderer();
+    connect(renderer, SIGNAL(styleChanged()), this, SIGNAL(styleChanged()));
+    return renderer;
 }
 
 void QQuickMapboxGL::setPlugin(QDeclarativeGeoServiceProvider *)
@@ -267,11 +269,13 @@ void QQuickMapboxGL::itemChange(QQuickItem::ItemChange change, const QQuickItem:
     case QQuickItem::ItemChildAddedChange:
         if (QQuickMapboxGLStyleProperty *property = qobject_cast<QQuickMapboxGLStyleProperty *>(value.item)) {
             connect(property, SIGNAL(updated(QVariantMap)), this, SLOT(onStylePropertyUpdated(QVariantMap)));
+            connect(this, SIGNAL(styleChanged()), property, SLOT(checkUpdated()));
         }
         break;
     case QQuickItem::ItemChildRemovedChange:
         if (QQuickMapboxGLStyleProperty *property = qobject_cast<QQuickMapboxGLStyleProperty *>(value.item)) {
             disconnect(property, SIGNAL(updated(QVariantMap)), this, SLOT(onStylePropertyUpdated(QVariantMap)));
+            disconnect(this, SIGNAL(styleChanged()), property, SLOT(checkUpdated()));
         }
     default:
         break;
diff --git a/platform/qt/src/qquickmapboxglrenderer.cpp b/platform/qt/src/qquickmapboxglrenderer.cpp
index 35a32be2ad..1b9a983d54 100644
--- a/platform/qt/src/qquickmapboxglrenderer.cpp
+++ b/platform/qt/src/qquickmapboxglrenderer.cpp
@@ -28,9 +28,24 @@ QQuickMapboxGLRenderer::~QQuickMapboxGLRenderer()
 
 void QQuickMapboxGLRenderer::onMapChanged(QMapboxGL::MapChange change)
 {
-    if (change == QMapboxGL::MapChangeDidFinishLoadingMap) {
+    auto onMapChangeWillStartLoadingMap = [&]() {
+        m_styleLoaded = false;
+    };
+
+    auto onMapChangeDidFinishLoadingMap = [&]() {
         m_styleLoaded = true;
-        update();
+        emit styleChanged();
+    };
+
+    switch (change) {
+    case QMapboxGL::MapChangeWillStartLoadingMap:
+        onMapChangeWillStartLoadingMap();
+        break;
+    case QMapboxGL::MapChangeDidFinishLoadingMap:
+        onMapChangeDidFinishLoadingMap();
+        break;
+    default:
+        break;
     }
 }
 
diff --git a/platform/qt/src/qquickmapboxglrenderer.hpp b/platform/qt/src/qquickmapboxglrenderer.hpp
index d7ca7430ab..a5e56e3675 100644
--- a/platform/qt/src/qquickmapboxglrenderer.hpp
+++ b/platform/qt/src/qquickmapboxglrenderer.hpp
@@ -25,6 +25,7 @@ public:
 
 signals:
     void centerChanged(const QGeoCoordinate &);
+    void styleChanged();
 
 public slots:
     void onMapChanged(QMapboxGL::MapChange);