PIValueTree::readChildValue method

some child-oriented methods
allow to create JSON from single PIValueTree

CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_policy(SET CMP0017 NEW) # need include() with .cmake
 project(PIP)
 set(PIP_MAJOR    3)
 set(PIP_MINOR    10)
-set(PIP_REVISION 2)
+set(PIP_REVISION 3)
 set(PIP_SUFFIX   )
 set(PIP_COMPANY  SHS)
 set(PIP_DOMAIN   org.SHS)

libs/main/serialization/pivaluetree_conversions.cpp

@@ -252,6 +252,7 @@ PIJSON toJSONTree(const PIValueTree & root, PIValueTreeConversions::Options opti
 
 
 PIJSON PIValueTreeConversions::toJSON(const PIValueTree & root, Options options) {
+	if (options[IncludeRoot]) return toJSONTree(root, options);
 	PIJSON ret = PIJSON::newArray();
 	for (const auto & c: root.children())
 		ret << toJSONTree(c, options);

libs/main/serialization/pivaluetree_conversions.h

@@ -38,7 +38,8 @@ enum Option {
 	WithAttributes = 0x1,
 	WithComment    = 0x2,
 	WithType       = 0x4,
-	WithAll        = 0xFFFFFF,
+	WithAll        = 0xFFF,
+	IncludeRoot    = 0x1000,
 	Default        = WithAll
 };
 typedef PIFlags<Option> Options;

libs/main/types/pivaluetree.cpp

@@ -146,6 +146,14 @@ bool PIValueTree::contains(const PIStringList & path) const {
 }
 
 
+int PIValueTree::childIndex(const PIString & name) const {
+	if (_is_null) return -1;
+	for (int i = 0; i < _children.size_s(); ++i)
+		if (_children[i].name() == name) return i;
+	return -1;
+}
+
+
 const PIValueTree & PIValueTree::child(const PIString & name) const {
 	if (_is_null) return *this;
 	for (const auto & c: _children)
@@ -162,6 +170,18 @@ PIValueTree & PIValueTree::child(const PIString & name) {
 }
 
 
+PIValueTree & PIValueTree::insertChild(int index, const PIValueTree & n) {
+	if (_is_null) return *this;
+	for (auto & c: _children)
+		if (c.name() == n.name()) {
+			c = n;
+			return *this;
+		}
+	_children.insert(piClampi(index, 0, _children.size_s()), n);
+	return *this;
+}
+
+
 PIValueTree & PIValueTree::addChild(const PIValueTree & n) {
 	if (_is_null) return *this;
 	for (auto & c: _children)

libs/main/types/pivaluetree.h

@@ -93,11 +93,18 @@ public:
 	const PIVector<PIValueTree> & children() const { return _children; }
 	void clearChildren() { _children.clear(); }
 	PIVariant childValue(const PIString & child_name, const PIVariant & default_value = PIVariant(), bool * exists = nullptr) const;
+	template<typename T>
+	PIValueTree & readChildValue(const PIString & child_name, T & read_to) {
+		if (contains(child_name)) read_to = child(child_name).value().value<T>();
+		return *this;
+	}
 
 	bool contains(const PIString & name) const;
 	bool contains(const PIStringList & path) const;
+	int childIndex(const PIString & name) const;
 	const PIValueTree & child(const PIString & name) const;
 	PIValueTree & child(const PIString & name);
+	PIValueTree & insertChild(int index, const PIValueTree & n);
 	PIValueTree & addChild(const PIValueTree & n);
 	PIValueTree & addChildren(const PIVector<PIValueTree> & n);
 	PIValueTree & remove(const PIString & name);