Blackboard: Add variable-to-property binding interface
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@ -20,19 +20,35 @@ void BBVariable::unref() {
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data = nullptr;
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}
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// void BBVariable::init_ref() {
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// if (data) {
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// unref();
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// }
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// data = memnew(Data);
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// data->refcount.init();
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// }
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void BBVariable::set_value(const Variant &p_value) {
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data->value = p_value;
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data->value = p_value; // Setting value even when bound as a fallback in case the binding fails.
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if (is_bound()) {
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Object *obj = ObjectDB::get_instance(ObjectID(data->bound_object));
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ERR_FAIL_COND_MSG(!obj, "Blackboard: Failed to get bound object.");
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#ifdef LIMBOAI_MODULE
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bool r_valid;
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obj->set(data->bound_property, p_value, &r_valid);
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ERR_FAIL_COND_MSG(!r_valid, vformat("Blackboard: Failed to set bound property `%s` on %s", data->bound_property, obj));
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#elif LIMBOAI_GDEXTENSION
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obj->set(data->bound_property, p_value);
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#endif
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}
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}
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Variant BBVariable::get_value() const {
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if (is_bound()) {
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Object *obj = ObjectDB::get_instance(ObjectID(data->bound_object));
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ERR_FAIL_COND_V_MSG(!obj, data->value, "Blackboard: Failed to get bound object.");
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#ifdef LIMBOAI_MODULE
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bool r_valid;
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Variant ret = obj->get(data->bound_property, &r_valid);
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ERR_FAIL_COND_V_MSG(!r_valid, data->value, vformat("Blackboard: Failed to get bound property `%s` on %s", data->bound_property, obj));
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#elif LIMBOAI_GDEXTENSION
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Variant ret = obj->get(data->bound_property);
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#endif
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return ret;
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}
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return data->value;
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}
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@ -89,6 +105,19 @@ void BBVariable::copy_prop_info(const BBVariable &p_other) {
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data->hint_string = p_other.data->hint_string;
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}
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void BBVariable::bind(Object *p_object, const StringName &p_property) {
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ERR_FAIL_NULL_MSG(p_object, "Blackboard: Binding failed - object is null.");
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ERR_FAIL_COND_MSG(p_property == StringName(), "Blackboard: Binding failed - property name is empty.");
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ERR_FAIL_COND_MSG(!OBJECT_HAS_PROPERTY(p_object, p_property), vformat("Blackboard: Binding failed - %s has no property `%s`.", p_object, p_property));
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data->bound_object = p_object->get_instance_id();
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data->bound_property = p_property;
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}
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void BBVariable::unbind() {
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data->bound_object = 0;
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data->bound_property = StringName();
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}
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bool BBVariable::operator==(const BBVariable &p_var) const {
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if (data == p_var.data) {
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return true;
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@ -14,14 +14,10 @@
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#ifdef LIMBOAI_MODULE
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#include "core/object/object.h"
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#include "core/templates/safe_refcount.h"
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#include "core/variant/variant.h"
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#endif // LIMBOAI_MODULE
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#ifdef LIMBOAI_GDEXTENSION
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#include "godot_cpp/core/defs.hpp"
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#include "godot_cpp/templates/safe_refcount.hpp"
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#include "godot_cpp/variant/variant.hpp"
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#include "godot_cpp/core/object.hpp"
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using namespace godot;
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#endif // LIMBOAI_GDEXTENSION
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@ -33,14 +29,14 @@ private:
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Variant::Type type = Variant::NIL;
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PropertyHint hint = PropertyHint::PROPERTY_HINT_NONE;
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String hint_string;
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// bool bound = false;
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// uint64_t bound_object = 0;
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// StringName bound_property;
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NodePath binding_path;
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uint64_t bound_object = 0;
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StringName bound_property;
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};
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Data *data = nullptr;
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void unref();
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// void init_ref();
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public:
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void set_value(const Variant &p_value);
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@ -60,10 +56,15 @@ public:
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bool is_same_prop_info(const BBVariable &p_other) const;
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void copy_prop_info(const BBVariable &p_other);
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// bool is_bound() { return bound; }
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// * Editor binding methods
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String get_binding_path() const { return data->binding_path; }
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void set_binding_path(const String &p_binding_path) { data->binding_path = p_binding_path; }
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bool has_binding() { return data->binding_path.is_empty(); }
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// void bind(Node *p_root, NodePath p_path);
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// void unbind();
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// * Runtime binding methods
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bool is_bound() const { return data->bound_object != 0; }
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void bind(Object *p_object, const StringName &p_property);
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void unbind();
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bool operator==(const BBVariable &p_var) const;
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bool operator!=(const BBVariable &p_var) const;
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@ -12,7 +12,6 @@
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#include "blackboard.h"
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#ifdef LIMBOAI_MODULE
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#include "core/error/error_macros.h"
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#include "core/variant/variant.h"
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#include "scene/main/node.h"
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#endif // LIMBOAI_MODULE
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@ -62,6 +61,16 @@ void Blackboard::erase_var(const String &p_name) {
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data.erase(p_name);
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}
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void Blackboard::bind_var_to_property(const String &p_name, Object *p_object, const StringName &p_property) {
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ERR_FAIL_COND_MSG(!data.has(p_name), "Blackboard: Binding failed - can't bind variable that doesn't exist.");
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data[p_name].bind(p_object, p_property);
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}
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void Blackboard::unbind_var(const String &p_name) {
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ERR_FAIL_COND_MSG(data.has(p_name), "Blackboard: Can't unbind variable that doesn't exist.");
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data[p_name].unbind();
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}
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void Blackboard::add_var(const String &p_name, const BBVariable &p_var) {
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ERR_FAIL_COND(data.has(p_name));
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data.insert(p_name, p_var);
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@ -89,4 +98,6 @@ void Blackboard::_bind_methods() {
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ClassDB::bind_method(D_METHOD("erase_var", "p_name"), &Blackboard::erase_var);
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ClassDB::bind_method(D_METHOD("prefetch_nodepath_vars", "p_node"), &Blackboard::prefetch_nodepath_vars);
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ClassDB::bind_method(D_METHOD("top"), &Blackboard::top);
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ClassDB::bind_method(D_METHOD("bind_var_to_property", "p_name", "p_object", "p_property"), &Blackboard::bind_var_to_property);
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ClassDB::bind_method(D_METHOD("unbind_var", "p_name"), &Blackboard::unbind_var);
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}
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@ -51,6 +51,9 @@ public:
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bool has_var(const String &p_name) const;
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void erase_var(const String &p_name);
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void bind_var_to_property(const String &p_name, Object *p_object, const StringName &p_property);
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void unbind_var(const String &p_name);
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void add_var(const String &p_name, const BBVariable &p_var);
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void prefetch_nodepath_vars(Node *p_node);
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@ -11,6 +11,15 @@
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<tutorials>
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</tutorials>
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<methods>
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<method name="bind_var_to_property">
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<return type="void" />
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<param index="0" name="p_name" type="String" />
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<param index="1" name="p_object" type="Object" />
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<param index="2" name="p_property" type="StringName" />
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<description>
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Establish a binding between a variable and the object's property specified by [param p_property] and [param p_object]. Changes to the variable update the property, and vice versa.
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</description>
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</method>
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<method name="erase_var">
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<return type="void" />
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<param index="0" name="p_name" type="String" />
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@ -67,5 +76,12 @@
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Returns the topmost [Blackboard] in the scope chain.
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</description>
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</method>
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<method name="unbind_var">
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<return type="void" />
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<param index="0" name="p_name" type="String" />
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<description>
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Remove binding from a variable.
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</description>
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</method>
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</methods>
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</class>
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@ -54,6 +54,11 @@
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#define GET_SCRIPT(m_obj) (m_obj->get_script_instance() ? m_obj->get_script_instance()->get_script() : nullptr)
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#define ADD_STYLEBOX_OVERRIDE(m_control, m_name, m_stylebox) (m_control->add_theme_style_override(m_name, m_stylebox))
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_FORCE_INLINE_ bool OBJECT_HAS_PROPERTY(Object *p_obj, const StringName &p_prop) {
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bool r_valid;
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return Variant(p_obj).has_key(p_prop, r_valid);
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}
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#define VARIANT_EVALUATE(m_op, m_lvalue, m_rvalue, r_ret) r_ret = Variant::evaluate(m_op, m_lvalue, m_rvalue)
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// * Virtual calls
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@ -133,6 +138,10 @@ using namespace godot;
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#define GET_SCRIPT(m_obj) (m_obj->get_script())
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#define ADD_STYLEBOX_OVERRIDE(m_control, m_name, m_stylebox) (m_control->add_theme_stylebox_override(m_name, m_stylebox))
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_FORCE_INLINE_ bool OBJECT_HAS_PROPERTY(Object *p_obj, const StringName &p_prop) {
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return Variant(p_obj).has_key(p_prop);
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}
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#define VARIANT_EVALUATE(m_op, m_lvalue, m_rvalue, r_ret) \
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{ \
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bool r_valid; \
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