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Blackboard: Add `create` parameter to `bind_var_to_property` and `link_var`

This commit is contained in:
Serhii Snitsaruk 2024-04-09 11:34:22 +02:00
parent 09562ffbd3
commit c739a876b0
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GPG Key ID: A965EF8799FFEC2D
4 changed files with 52 additions and 41 deletions
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26
blackboard/blackboard.cpp
View File

@ -64,13 +64,19 @@ void Blackboard::erase_var(const StringName &p_name) {
data.erase(p_name); data.erase(p_name);
} }
void Blackboard::bind_var_to_property(const StringName &p_name, Object *p_object, const StringName &p_property) { void Blackboard::bind_var_to_property(const StringName &p_name, Object *p_object, const StringName &p_property, bool p_create) {
ERR_FAIL_COND_MSG(!data.has(p_name), "Blackboard: Binding failed - can't bind variable that doesn't exist."); if (!data.has(p_name)) {
if (p_create) {
data.insert(p_name, BBVariable());
} else {
ERR_FAIL_MSG("Blackboard: Can't bind variable that doesn't exist (var: " + p_name + ").");
}
}
data[p_name].bind(p_object, p_property); data[p_name].bind(p_object, p_property);
} }
void Blackboard::unbind_var(const StringName &p_name) { void Blackboard::unbind_var(const StringName &p_name) {
ERR_FAIL_COND_MSG(data.has(p_name), "Blackboard: Can't unbind variable that doesn't exist."); ERR_FAIL_COND_MSG(data.has(p_name), "Blackboard: Can't unbind variable that doesn't exist (var: " + p_name + ").");
data[p_name].unbind(); data[p_name].unbind();
} }
@ -78,8 +84,14 @@ void Blackboard::assign_var(const StringName &p_name, const BBVariable &p_var) {
data.insert(p_name, p_var); data.insert(p_name, p_var);
} }
void Blackboard::link_var(const StringName &p_name, const Ref<Blackboard> &p_target_blackboard, const StringName &p_target_var) { void Blackboard::link_var(const StringName &p_name, const Ref<Blackboard> &p_target_blackboard, const StringName &p_target_var, bool p_create) {
ERR_FAIL_COND_MSG(!data.has(p_name), "Blackboard: Can't link variable that doesn't exist (var: " + p_name + ")."); if (!data.has(p_name)) {
if (p_create) {
data.insert(p_name, BBVariable());
} else {
ERR_FAIL_MSG("Blackboard: Can't link variable that doesn't exist (var: " + p_name + ").");
}
}
ERR_FAIL_COND_MSG(p_target_blackboard.is_null(), "Blackboard: Can't link variable to target blackboard that is null (var: " + p_name + ")."); ERR_FAIL_COND_MSG(p_target_blackboard.is_null(), "Blackboard: Can't link variable to target blackboard that is null (var: " + p_name + ").");
ERR_FAIL_COND_MSG(!p_target_blackboard->data.has(p_target_var), "Blackboard: Can't link variable to non-existent target (var: " + p_name + ", target: " + p_target_var + ")."); ERR_FAIL_COND_MSG(!p_target_blackboard->data.has(p_target_var), "Blackboard: Can't link variable to non-existent target (var: " + p_name + ", target: " + p_target_var + ").");
data[p_name] = p_target_blackboard->data[p_target_var]; data[p_name] = p_target_blackboard->data[p_target_var];
@ -93,7 +105,7 @@ void Blackboard::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_parent"), &Blackboard::get_parent); ClassDB::bind_method(D_METHOD("get_parent"), &Blackboard::get_parent);
ClassDB::bind_method(D_METHOD("erase_var", "var_name"), &Blackboard::erase_var); ClassDB::bind_method(D_METHOD("erase_var", "var_name"), &Blackboard::erase_var);
ClassDB::bind_method(D_METHOD("top"), &Blackboard::top); ClassDB::bind_method(D_METHOD("top"), &Blackboard::top);
ClassDB::bind_method(D_METHOD("bind_var_to_property", "var_name", "object", "property"), &Blackboard::bind_var_to_property); ClassDB::bind_method(D_METHOD("bind_var_to_property", "var_name", "object", "property", "create"), &Blackboard::bind_var_to_property, DEFVAL(false));
ClassDB::bind_method(D_METHOD("unbind_var", "var_name"), &Blackboard::unbind_var); ClassDB::bind_method(D_METHOD("unbind_var", "var_name"), &Blackboard::unbind_var);
ClassDB::bind_method(D_METHOD("link_var", "var_name", "target_blackboard", "target_var"), &Blackboard::link_var); ClassDB::bind_method(D_METHOD("link_var", "var_name", "target_blackboard", "target_var", "create"), &Blackboard::link_var, DEFVAL(false));
} }

4
blackboard/blackboard.h
View File

@ -51,12 +51,12 @@ public:
bool has_var(const StringName &p_name) const; bool has_var(const StringName &p_name) const;
void erase_var(const StringName &p_name); void erase_var(const StringName &p_name);
void bind_var_to_property(const StringName &p_name, Object *p_object, const StringName &p_property); void bind_var_to_property(const StringName &p_name, Object *p_object, const StringName &p_property, bool p_create = false);
void unbind_var(const StringName &p_name); void unbind_var(const StringName &p_name);
void assign_var(const StringName &p_name, const BBVariable &p_var); void assign_var(const StringName &p_name, const BBVariable &p_var);
void link_var(const StringName &p_name, const Ref<Blackboard> &p_target_blackboard, const StringName &p_target_var); void link_var(const StringName &p_name, const Ref<Blackboard> &p_target_blackboard, const StringName &p_target_var, bool p_create = false);
// TODO: Add serialization API. // TODO: Add serialization API.
}; };

54
doc/source/classes/class_blackboard.rst
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@ -33,27 +33,27 @@ Methods
.. table:: .. table::
:widths: auto :widths: auto
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void | :ref:`bind_var_to_property<class_Blackboard_method_bind_var_to_property>` **(** StringName var_name, Object object, StringName property **)** | | void | :ref:`bind_var_to_property<class_Blackboard_method_bind_var_to_property>` **(** StringName var_name, Object object, StringName property, bool create **)** |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void | :ref:`erase_var<class_Blackboard_method_erase_var>` **(** StringName var_name **)** | | void | :ref:`erase_var<class_Blackboard_method_erase_var>` **(** StringName var_name **)** |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Blackboard<class_Blackboard>` | :ref:`get_parent<class_Blackboard_method_get_parent>` **(** **)** |const| | | :ref:`Blackboard<class_Blackboard>` | :ref:`get_parent<class_Blackboard_method_get_parent>` **(** **)** |const| |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Variant | :ref:`get_var<class_Blackboard_method_get_var>` **(** StringName var_name, Variant default=null, bool complain=true **)** |const| | | Variant | :ref:`get_var<class_Blackboard_method_get_var>` **(** StringName var_name, Variant default=null, bool complain=true **)** |const| |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| bool | :ref:`has_var<class_Blackboard_method_has_var>` **(** StringName var_name **)** |const| | | bool | :ref:`has_var<class_Blackboard_method_has_var>` **(** StringName var_name **)** |const| |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void | :ref:`link_var<class_Blackboard_method_link_var>` **(** StringName var_name, :ref:`Blackboard<class_Blackboard>` target_blackboard, StringName target_var **)** | | void | :ref:`link_var<class_Blackboard_method_link_var>` **(** StringName var_name, :ref:`Blackboard<class_Blackboard>` target_blackboard, StringName target_var, bool create **)** |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void | :ref:`set_parent<class_Blackboard_method_set_parent>` **(** :ref:`Blackboard<class_Blackboard>` blackboard **)** | | void | :ref:`set_parent<class_Blackboard_method_set_parent>` **(** :ref:`Blackboard<class_Blackboard>` blackboard **)** |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void | :ref:`set_var<class_Blackboard_method_set_var>` **(** StringName var_name, Variant value **)** | | void | :ref:`set_var<class_Blackboard_method_set_var>` **(** StringName var_name, Variant value **)** |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`Blackboard<class_Blackboard>` | :ref:`top<class_Blackboard_method_top>` **(** **)** |const| | | :ref:`Blackboard<class_Blackboard>` | :ref:`top<class_Blackboard_method_top>` **(** **)** |const| |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| void | :ref:`unbind_var<class_Blackboard_method_unbind_var>` **(** StringName var_name **)** | | void | :ref:`unbind_var<class_Blackboard_method_unbind_var>` **(** StringName var_name **)** |
+-------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------+ +-------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
.. rst-class:: classref-section-separator .. rst-class:: classref-section-separator
@ -68,9 +68,9 @@ Method Descriptions
.. rst-class:: classref-method .. rst-class:: classref-method
void **bind_var_to_property** **(** StringName var_name, Object object, StringName property **)** void **bind_var_to_property** **(** StringName var_name, Object object, StringName property, bool create **)**
Establish a binding between a variable and the object's property specified by ``property`` and ``object``. Changes to the variable update the property, and vice versa. Establish a binding between a variable and the object's property specified by ``property`` and ``object``. Changes to the variable update the property, and vice versa. If ``create`` is ``true``, the variable will be created if it doesn't exist.
.. rst-class:: classref-item-separator .. rst-class:: classref-item-separator
@ -128,13 +128,11 @@ Returns ``true`` if the Blackboard contains the ``var_name`` variable, including
.. rst-class:: classref-method .. rst-class:: classref-method
void **link_var** **(** StringName var_name, :ref:`Blackboard<class_Blackboard>` target_blackboard, StringName target_var **)** void **link_var** **(** StringName var_name, :ref:`Blackboard<class_Blackboard>` target_blackboard, StringName target_var, bool create **)**
Links a variable to another Blackboard variable. If a variable is linked to another variable, their state will always be identical, and any change to one will be reflected in the other. You can use this method to link a variable in the current scope to a variable in another scope, or in another Blackboard instance. Links a variable to another Blackboard variable. If a variable is linked to another variable, their state will always be identical, and any change to one will be reflected in the other. If ``create`` is ``true``, the variable will be created if it doesn't exist.
You can use this method to link a variable in the current scope to a variable in another scope, or in another Blackboard instance. A variable can only be linked to one other variable. Calling this method again will overwrite the previous link. However, it is possible to link to the same variable from multiple different variables.
A variable can only be linked to one other variable. Calling this method again will overwrite the previous link. However, it is possible to link to the same variable from multiple different variables.
.. rst-class:: classref-item-separator .. rst-class:: classref-item-separator

9
doc_classes/Blackboard.xml
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@ -16,8 +16,9 @@
<param index="0" name="var_name" type="StringName" /> <param index="0" name="var_name" type="StringName" />
<param index="1" name="object" type="Object" /> <param index="1" name="object" type="Object" />
<param index="2" name="property" type="StringName" /> <param index="2" name="property" type="StringName" />
<param index="3" name="create" type="bool" />
<description> <description>
Establish a binding between a variable and the object's property specified by [param property] and [param object]. Changes to the variable update the property, and vice versa. Establish a binding between a variable and the object's property specified by [param property] and [param object]. Changes to the variable update the property, and vice versa. If [param create] is [code]true[/code], the variable will be created if it doesn't exist.
</description> </description>
</method> </method>
<method name="erase_var"> <method name="erase_var">
@ -54,10 +55,10 @@
<param index="0" name="var_name" type="StringName" /> <param index="0" name="var_name" type="StringName" />
<param index="1" name="target_blackboard" type="Blackboard" /> <param index="1" name="target_blackboard" type="Blackboard" />
<param index="2" name="target_var" type="StringName" /> <param index="2" name="target_var" type="StringName" />
<param index="3" name="create" type="bool" />
<description> <description>
Links a variable to another Blackboard variable. If a variable is linked to another variable, their state will always be identical, and any change to one will be reflected in the other. You can use this method to link a variable in the current scope to a variable in another scope, or in another Blackboard instance. Links a variable to another Blackboard variable. If a variable is linked to another variable, their state will always be identical, and any change to one will be reflected in the other. If [param create] is [code]true[/code], the variable will be created if it doesn't exist.
You can use this method to link a variable in the current scope to a variable in another scope, or in another Blackboard instance. A variable can only be linked to one other variable. Calling this method again will overwrite the previous link. However, it is possible to link to the same variable from multiple different variables.
A variable can only be linked to one other variable. Calling this method again will overwrite the previous link. However, it is possible to link to the same variable from multiple different variables.
</description> </description>
</method> </method>
<method name="set_parent"> <method name="set_parent">