[Qt] Added set style layout properties method

platform/qt/include/qmapboxgl.hpp

@@ -174,6 +174,8 @@ public:
 
     void removeAnnotation(QMapbox::AnnotationID);
 
+    void setLayoutProperty(const QString &layer, const QString &property, const QVariant &value);
+
     bool isRotating() const;
     bool isScaling() const;
     bool isPanning() const;

platform/qt/src/qmapboxgl.cpp

@@ -6,6 +6,8 @@
 #include <mbgl/gl/gl.hpp>
 #include <mbgl/map/camera.hpp>
 #include <mbgl/map/map.hpp>
+#include <mbgl/style/conversion.hpp>
+#include <mbgl/style/conversion/layer.hpp>
 #include <mbgl/style/layers/custom_layer.hpp>
 #include <mbgl/style/transition_options.hpp>
 #include <mbgl/sprite/sprite_image.hpp>
@@ -22,6 +24,7 @@
 #include <QCoreApplication>
 #endif
 
+#include <QDebug>
 #include <QImage>
 #include <QMapboxGL>
 #include <QMargins>
@@ -448,6 +451,24 @@ void QMapboxGL::removeAnnotation(AnnotationID annotationID)
     d_ptr->mapObj->removeAnnotation(annotationID);
 }
 
+void QMapboxGL::setLayoutProperty(const QString& layer_, const QString& property, const QVariant& value)
+{
+    using namespace mbgl::style;
+
+    Layer* layer = d_ptr->mapObj->getLayer(layer_.toStdString());
+    if (!layer) {
+        qWarning() << "Layer not found:" << layer_;
+        return;
+    }
+
+    if (conversion::setLayoutProperty(*layer, property.toStdString(), value)) {
+        qWarning() << "Error setting layout property:" << layer_ << "-" << property;
+        return;
+    }
+
+    d_ptr->mapObj->update(mbgl::Update::RecalculateStyle);
+}
+
 bool QMapboxGL::isRotating() const
 {
     return d_ptr->mapObj->isRotating();