Unigine::Properties Class

Adding Callbacks#

You can add callbacks to track any changes made to any property and perform certain actions. The signature of the callback function must be as follows:

Source code (C++)

void callback_function_name(PropertyPtr property);

Here is an example of tracking property removal via callbacks:

Source code (C++)

void property_removed(PropertyPtr property)
{
	Log::message("Property \"%s\" was removed.\n", property->getName());
    // ...
}

// somewhere in the code

// inheriting a new property named "my_prop" from the base property "surface_base"
PropertyPtr property = Properties::findManualProperty("surface_base")->inherit("my_prop");

// setting our callback function on property removal
Properties::addCallback(Property::CALLBACK_REMOVED, MakeCallback(property_removed));

// removing the property named "my_prop"
Properties::removeProperty(Properties::findProperty("my_prop")->getGUID());

功能列表:

Name	说明/描述 View: Sort by:
getNumProperties	Returns the total number of properties loaded for the current project.
getProperty	Returns a property by its number.
isProperty	Checks if a property with the given name exists.
isManualProperty	Checks if a property with the given name exists.
getPropertyName	Returns the name of the property by its number.
cloneProperty	Clones the property and assigns the specified name and path to the clone.
findProperty	Searches for a property with the given name.
findManualProperty	Searches for a manual property with the given name.
findPropertyByGUID	Searches for a property with the given GUID.
findPropertyByPath	Searches for a property with the given path.
findPropertyByFileGUID	Searches for a property with the given *.prop file GUID.
loadProperty	Loads a property from the specified *.prop file.
inheritProperty	Inherits a property from the given property and assigns the specified name and path to the new property.
removeProperty	Removes the property with the specified GUID.
renameProperty	Changes the name of the property with the specified GUID.
replaceProperty	Replaces the specified property with a new one for all nodes and surfaces.
reparentProperty	Sets a new parent for the specified property.
reloadProperties	Reloads all *.prop files from all data folders.
saveProperties	Saves all properties that can be saved to corresponding *.prop files.
addCallback	Adds a callback of the specified type.
removeCallback	Removes the specified callback from the list of callbacks of the specified type.
clearCallbacks	Clears all added callbacks of the specified type.

Properties Class

Enums

CALLBACK_INDEX#

Name	说明/描述
CALLBACK_CREATED = 0	Property created callback. This callback is fired when a new property is created.
CALLBACK_MOVED = 1	Property moved callback. This callback is fired when the path of a property is changed.
CALLBACK_RENAMED = 2	Property renamed callback. This callback is fired when the name of a property is changed.
CALLBACK_REPARENTED = 3	Property reparented callback. This callback is fired when the parent of a property is changed.
CALLBACK_REMOVED = 4	Property removed callback. This callback is fired when a property is removed.

Members

int getNumProperties ( ) #

Returns the total number of properties loaded for the current project.

Return value

Total number of properties loaded.

Ptr<Property> getProperty ( int num ) #

Returns a property by its number. The returned property can be modified by using methods of the Property class.

Source code (C++)

Vector<PropertyPtr> my_properties;
for (int i = 0; i < Properties::getNumProperties(); i++) {
	my_properties.append(Properties::getProperty(i));
}

Arguments

int num - Number of the property in range from 0 to the total number of properties.

Return value

Property smart pointer if it exists or NULL.

int isProperty ( const char * name ) #

Checks if a property with the given name exists.

Arguments

const char * name - Name of the property.

Return value

1 if a property with the given name exists; otherwise, 0.

int isProperty ( const UGUID & guid ) #

Checks if a property with the given GUID exists.

Arguments

const UGUID & guid - GUID of the property.

Return value

1 if a property with the given GUID exists; otherwise, 0.

int isManualProperty ( const char * name ) #

Checks if a property with the given name exists.

Arguments

const char * name - Name of the manual property.

Return value

1 if a manual property with the given name exists; otherwise, 0.

const char * getPropertyName ( int num ) #

Returns the name of the property by its number.

Arguments

int num - Number of the property in range from 0 to the total number of properties.

Return value

Name of the property.

NoticeIf the property with the specified number is internal and has a parent, the parent's name will be returned.

Ptr<Property> cloneProperty ( const UGUID & guid, const char * name = 0, const char * path = 0 ) #

Clones the property and assigns the specified name and path to the clone.

Notice

Without a name the cloned property won't be displayed in the properties hierarchy, without a path it won't be saved when saveProperties() is called.

Arguments

const UGUID & guid - GUID of the property to clone.
const char * name - Cloned property name.
const char * path - Path to save the cloned property.

Return value

Property smart pointer if the property with the specified GUID exists or nullptr.

Ptr<Property> findProperty ( const char * name ) #

Searches for a property with the given name. The returned property can be managed using the methods of the Property class.

Arguments

const char * name - Property name.

Return value

Property, if it is found (an instance of the Property class); otherwise, nullptr.

Ptr<Property> findManualProperty ( const char * name ) #

Searches for a manual property with the given name. The returned property can be managed using the methods of the Property class.

Arguments

const char * name - Manual property name.

Return value

Manual property, if it is found (an instance of the Property class); otherwise, nullptr.

Ptr<Property> findPropertyByGUID ( const UGUID & guid ) #

Searches for a property with the given GUID. The returned property can be managed using the methods of the Property class.

Arguments

const UGUID & guid - Property GUID.

Return value

Property, if it is found (an instance of the Property class); otherwise, nullptr.

Ptr<Property> findPropertyByPath ( const char * path ) #

Searches for a property with the given path. The returned property can be managed using the methods of the Property class.

Arguments

const char * path - Property path.

Return value

Property, if it is found (an instance of the Property class); otherwise, nullptr.

Ptr<Property> findPropertyByFileGUID ( const UGUID & guid ) #

Searches for a property with the given *.prop file GUID. The returned property can be managed using the methods of the Property class.

Arguments

const UGUID & guid - Property file GUID.

Return value

Property, if it is found (an instance of the Property class); otherwise, nullptr.

Ptr<Property> loadProperty ( const char * path ) #

Loads a property from the specified *.prop file. The returned property can be managed using the methods of the Property class.

Arguments

const char * path - Path to the *.prop file to load a property from.

Return value

Property, if it is loaded successfully (an instance of the Property class); otherwise, nullptr.

Ptr<Property> inheritProperty ( const UGUID & guid, const char * name = 0, const char * path = 0 ) #

Inherits a property from the given property and assigns the specified name and path to the new property.

Notice

Without a name the inherited property won't be displayed in the properties hierarchy, without a path it won't be saved when saveProperties() is called.

Arguments

const UGUID & guid - GUID of the property to inherit from.
const char * name - Inherited property name.
const char * path - Path to save the inherited property.

Return value

Property smart pointer if the property with the specified GUID exists or nullptr.

int removeProperty ( const UGUID & guid, int remove_file = 0, int remove_children = 1 ) #

Removes the property with the specified GUID.

Notice

A root property (the property that has no parent) or a non-editable property cannot be removed using this function.

Arguments

const UGUID & guid - GUID of the property to remove.
int remove_file - Flag indicating if the corresponding *.prop file will be deleted. Set 1 to delete the file, or 0 to keep it.
int remove_children - Flag indicating if all children of the property will be deleted. Set 1 to delete all children of the property, or 0 to link all children to the parent.

Return value

1 if the property is removed successfully; otherwise, 0.

int renameProperty ( const UGUID & guid, const char * new_name ) #

Changes the name of the property with the specified GUID.

Notice

The name of the *.prop file is not affected.
This method is not available for the manual and non-editable properties.

Arguments

const UGUID & guid - GUID of the property to be renamed.
const char * new_name - New name for the property to be set.

Return value

1 if the property is renamed successfully; otherwise, 0.

int replaceProperty ( const Ptr<Property> & property, const Ptr<Property> & new_property ) #

Replaces the specified property with a new one for all nodes and surfaces. The new property that replaces the specified one must exist. For example, if you have 3 nodes with the same property, calling this method will change this property to the specified one for all these nodes.

Arguments

const Ptr<Property> & property - Property to be replaced.
const Ptr<Property> & new_property - New property.

Return value

1 if the property is replaced successfully; otherwise, 0.

int reparentProperty ( const UGUID & guid, const UGUID & new_parent, int save_all_values = 0 ) #

Sets a new parent for the specified property. Both properties with given GUIDs must exist.

Notice

The method isn't available for the manual and non-editable properties.

Arguments

const UGUID & guid - GUID of the property whose parent is to be changed.
const UGUID & new_parent - GUID of the property to be set as a new parent.
int save_all_values - Flag indicating if parameter values of the specified property will be saved after reparenting.

Return value

1 if the parent for the property is changed successfully; otherwise, 0.

void reloadProperties ( ) #

Reloads all *.prop files from all data folders.

NoticeIf new *.prop files are found, they will be loaded automatically. The hierarchy will be rebuilt if necessary, while keeping all overridden parameter values.

int saveProperties ( ) #

Saves all properties that can be saved to corresponding *.prop files.

Notice

This method will save only the properties that:

are not manual
are editable
have a name (not internal)
have a path

Return value

1 if all properties are saved successfully; otherwise, 0.

void * addCallback ( CALLBACK_INDEX callback, Unigine::CallbackBase1< Ptr<Property> > * func ) #

Adds a callback of the specified type. Callback functions can be used to determine actions to be performed when any changes to any property are made. The signature of the callback function must be as follows:

Source code (C++)

void callback_function_name(PropertyPtr property);

Here is an example of tracking property removal via callbacks:

Source code (C++)

void property_removed(PropertyPtr property)
{
	Log::message("Property \"%s\" was removed.\n", property->getName());
    // ...
}

// somewhere in the code

// inheriting a new property named "my_prop" from the base property "surface_base"
PropertyPtr property = Properties::findManualProperty("surface_base")->inherit("my_prop");

// setting our callback function on property removal
Properties::addCallback(Properties::CALLBACK_REMOVED, MakeCallback(property_removed));

// removing the property named "my_prop"
Properties::removeProperty(Properties::findProperty("my_prop")->getGUID());

Arguments

CALLBACK_INDEX callback - Callback type. One of the CALLBACK_* variables.
Unigine::CallbackBase1< Ptr<Property> > * func - Callback pointer.

Return value

ID of the last added callback of the specified type, if the callback was added successfully; otherwise, nullptr. This ID can be used to remove this callback when necessary.

bool removeCallback ( CALLBACK_INDEX callback, void * id ) #

Removes the specified callback from the list of callbacks of the specified type. Callback functions can be used to determine actions to be performed when any changes to any property are made.

Arguments

CALLBACK_INDEX callback - Callback type. One of the CALLBACK_* variables.
void * id - Callback ID obtained when adding it.

Return value

True if the callback with the given ID was removed successfully; otherwise false.

void clearCallbacks ( CALLBACK_INDEX callback ) #

Clears all added callbacks of the specified type. Callback functions can be used to determine actions to be performed when any changes to any property are made.

Arguments

CALLBACK_INDEX callback - Callback type. One of the CALLBACK_* variables.

Last update: 2023-06-23

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Unigine::Properties Class

In This Article:

Adding Callbacks#

See Also#

功能列表:

Properties Class

Enums

CALLBACK_INDEX#

Members

int getNumProperties ( ) #

Return value

Ptr<Property> getProperty ( int num ) #

Arguments

Return value

int isProperty ( const char * name ) #

Arguments

Return value

int isProperty ( const UGUID & guid ) #

Arguments

Return value

int isManualProperty ( const char * name ) #

Arguments

Return value

const char * getPropertyName ( int num ) #

Arguments

Return value

Ptr<Property> cloneProperty ( const UGUID & guid, const char * name = 0, const char * path = 0 ) #

Arguments

Return value

Ptr<Property> findProperty ( const char * name ) #

Arguments

Return value

Ptr<Property> findManualProperty ( const char * name ) #

Arguments

Return value

Ptr<Property> findPropertyByGUID ( const UGUID & guid ) #

Arguments

Return value

Ptr<Property> findPropertyByPath ( const char * path ) #

Arguments

Return value

Ptr<Property> findPropertyByFileGUID ( const UGUID & guid ) #

Arguments

Return value

Ptr<Property> loadProperty ( const char * path ) #

Arguments

Return value

Ptr<Property> inheritProperty ( const UGUID & guid, const char * name = 0, const char * path = 0 ) #

Arguments

Return value

int removeProperty ( const UGUID & guid, int remove_file = 0, int remove_children = 1 ) #

Arguments

Return value

int renameProperty ( const UGUID & guid, const char * new_name ) #

Arguments

Return value

int replaceProperty ( const Ptr<Property> & property, const Ptr<Property> & new_property ) #

Arguments

Return value

int reparentProperty ( const UGUID & guid, const UGUID & new_parent, int save_all_values = 0 ) #

Arguments

Return value

void reloadProperties ( ) #

int saveProperties ( ) #

Return value

void * addCallback ( CALLBACK_INDEX callback, Unigine::CallbackBase1< Ptr<Property> > * func ) #

Arguments

Return value

bool removeCallback ( CALLBACK_INDEX callback, void * id ) #

Arguments

Return value

void clearCallbacks ( CALLBACK_INDEX callback ) #

Arguments