mirror of
https://github.com/OpenSpace/OpenSpace.git
synced 2026-01-05 11:09:37 -06:00
536 lines
23 KiB
C++
536 lines
23 KiB
C++
/*****************************************************************************************
|
|
* *
|
|
* OpenSpace *
|
|
* *
|
|
* Copyright (c) 2014-2018 *
|
|
* *
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy of this *
|
|
* software and associated documentation files (the "Software"), to deal in the Software *
|
|
* without restriction, including without limitation the rights to use, copy, modify, *
|
|
* merge, publish, distribute, sublicense, and/or sell copies of the Software, and to *
|
|
* permit persons to whom the Software is furnished to do so, subject to the following *
|
|
* conditions: *
|
|
* *
|
|
* The above copyright notice and this permission notice shall be included in all copies *
|
|
* or substantial portions of the Software. *
|
|
* *
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, *
|
|
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A *
|
|
* PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT *
|
|
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF *
|
|
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE *
|
|
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
|
|
****************************************************************************************/
|
|
|
|
#ifndef __OPENSPACE_CORE___PROPERTY___H__
|
|
#define __OPENSPACE_CORE___PROPERTY___H__
|
|
|
|
#include <ghoul/misc/dictionary.h>
|
|
#include <ghoul/misc/easing.h>
|
|
#include <functional>
|
|
#include <string>
|
|
|
|
struct lua_State;
|
|
|
|
namespace openspace::properties {
|
|
|
|
class PropertyOwner;
|
|
|
|
/**
|
|
* A property encapsulates a value which should be user-changeable. A property almost
|
|
* always belongs to a PropertyOwner who has taken ownership (setPropertyOwner) of the
|
|
* Property. Per PropertyOwner, the <code>identifier</code> needs to be unique and can be
|
|
* used as a URI. This class is an abstract base class and each subclass (most notable
|
|
* TemplateProperty) needs to implement the methods Property::className, Property::get,
|
|
* Property::set, Property::type(), Property::getLuaValue, Property::setLuaValue,
|
|
* Property::getStringValue, Property::setStringValue and Property::typeLua to make full
|
|
* use of the infrastructure.
|
|
* The most common types can be implemented by creating a specialized instantiation of
|
|
* TemplateProperty, which provides default implementations for these methods.
|
|
*
|
|
* The onChange method can be used by the PropertyOwner to listen to changes that happen
|
|
* to the Property. The parameter is a function object that gets called after new value
|
|
* has been set.
|
|
* The metaData allows the developer to specify additional information about the Property
|
|
* which might be used in GUI representations. One example would be a glm::vec4 property,
|
|
* (Vec4Property) that can either represent a 4-dimensional position, a powerscaled
|
|
* coordinate, a light position, or other things, requiring different GUI representations.
|
|
* \see TemplateProperty
|
|
* \see PropertyOwner
|
|
*/
|
|
class Property {
|
|
public:
|
|
/**
|
|
* The visibility classes for Property%s. The classes are strictly ordered as
|
|
* All > Developer > User > Hidden
|
|
*/
|
|
enum class Visibility {
|
|
Hidden = 3, ///< Never visible
|
|
Developer = 2, ///< Visible in Developer mode
|
|
User = 1, ///< Visible in User mode
|
|
All = 0, ///< Visible for all types, no matter what
|
|
};
|
|
|
|
/**
|
|
* This structure is passed to the constructor of a Property and contains the unique
|
|
* identifier, a GUI name and descriptive text that are both user facing.
|
|
*/
|
|
struct PropertyInfo {
|
|
/// The unique identifier that is part of the fully qualified URI of this Property
|
|
const char* identifier;
|
|
/// The name that is displayed in the user interface
|
|
const char* guiName;
|
|
/// The user facing description of this Property
|
|
const char* description;
|
|
/// Determins the visibility of this Property in the user interface
|
|
Visibility visibility = Visibility::All;
|
|
};
|
|
|
|
/// An OnChangeHandle is returned by the onChange method to uniquely identify an
|
|
/// onChange callback
|
|
using OnChangeHandle = uint32_t;
|
|
|
|
/// An OnChangeHandle is returned by the onChange method to uniquely identify an
|
|
/// onDelete callback
|
|
using OnDeleteHandle = uint32_t;
|
|
|
|
/// This OnChangeHandle can be used to remove all onChange callbacks from this
|
|
/// Property
|
|
static OnChangeHandle OnChangeHandleAll;
|
|
|
|
/**
|
|
* The constructor for the property. The \p info (see #PropertyInfo) contains
|
|
* necessary information for this Property. #PropertyInfo::identifier needs to be
|
|
* unique for each PropertyOwner. The #PropertyInfo::guiName will be stored in the
|
|
* metaData to be accessed by the GUI elements using the #PropertyInfo::guiName key.
|
|
* The default visibility settings is Visibility::All, whereas the default read-only
|
|
* state is \c false.
|
|
*
|
|
* \param info The PropertyInfo structure that contains all the required static
|
|
* information for initializing this Property.
|
|
*
|
|
* \pre \p info.identifier must not be empty
|
|
* \pre \p info.guiName must not be empty
|
|
*/
|
|
Property(PropertyInfo info);
|
|
|
|
/**
|
|
* The destructor taking care of deallocating all unused memory. This method will not
|
|
* remove the Property from the PropertyOwner.
|
|
*/
|
|
virtual ~Property();
|
|
|
|
/**
|
|
* This method returns the class name of the Property. The method is used by the
|
|
* TemplateFactory to create new instances of Propertys. The returned value is almost
|
|
* always identical to the C++ class name of the derived class.
|
|
*
|
|
* \return The class name of the Property
|
|
*/
|
|
virtual std::string className() const = 0;
|
|
|
|
/**
|
|
* This method returns the encapsulated value of the Property to the caller. The type
|
|
* that is returned is determined by the type function and is up to the developer of
|
|
* the derived class. The default implementation returns an empty ghoul::any object.
|
|
*
|
|
* \return The value that is encapsulated by this Property, or an empty ghoul::any
|
|
* object if the method was not overritten.
|
|
*/
|
|
virtual ghoul::any get() const;
|
|
|
|
/**
|
|
* Sets the value encapsulated by this Property to the \p value passed to this
|
|
* function. It is the caller's responsibility to ensure that the type contained in
|
|
* \p value is compatible with the concrete subclass of the Property. The method
|
|
* Property::type will return the desired type for the Property. The default
|
|
* implementation of this method ignores the input.
|
|
*
|
|
* \param value The new value that should be stored in this Property
|
|
*/
|
|
virtual void set(ghoul::any value);
|
|
|
|
/**
|
|
* This method returns the type that is requested by this Property for the set method.
|
|
* The default implementation returns the type of \c void.
|
|
*
|
|
* \return The type that is requested by this Property's Property::set method
|
|
*/
|
|
virtual const std::type_info& type() const;
|
|
|
|
/**
|
|
* This method encodes the encapsulated value of this Property at the top of the Lua
|
|
* stack. The specific details of this serialization is up to the property developer
|
|
* as long as the rest of the stack is unchanged. The implementation has to be
|
|
* synchronized with the Property::setLuaValue method. The default implementation is a
|
|
* no-op.
|
|
*
|
|
* \param state The Lua state to which the value will be encoded
|
|
* \return \c true if the encoding succeeded, \c false otherwise
|
|
*/
|
|
virtual bool getLuaValue(lua_State* state) const;
|
|
|
|
/**
|
|
* This method sets the value encapsulated by this Property by deserializing the value
|
|
* on top of the passed Lua stack. The specific details of the deserialization are up
|
|
* to the Property developer, but they must only depend on the top element of the
|
|
* stack and must leave all other elements unchanged. The implementation has to be
|
|
* synchronized with the Property::getLuaValue method. The default implementation is a
|
|
* no-op.
|
|
*
|
|
* \param state The Lua state from which the value will be decoded
|
|
* \return \c true if the decoding and setting of the value succeeded, \c false
|
|
* otherwise
|
|
*/
|
|
virtual bool setLuaValue(lua_State* state);
|
|
|
|
/**
|
|
* Returns the Lua type that will be put onto the stack in the Property::getLua method
|
|
* and which will be consumed by the Property::setLuaValue method. The returned value
|
|
* can belong to the set of Lua types: \c LUA_TNONE, \c LUA_TNIL, \c LUA_TBOOLEAN,
|
|
* \c LUA_TLIGHTUSERDATA, \c LUA_TNUMBER, \c LUA_TSTRING, \c LUA_TTABLE,
|
|
* \c LUA_TFUNCTION, \c LUA_TUSERDATA, or \c LUA_TTHREAD. The default implementation
|
|
* will return \c LUA_TNONE.
|
|
*
|
|
* \return The Lua type that will be consumed or produced by the Property::getLuaValue
|
|
* and Property::setLuaValue methods.
|
|
*/
|
|
virtual int typeLua() const;
|
|
|
|
/**
|
|
* This method encodes the encapsulated \p value of this Property as a
|
|
* <code>std::string</code>. The specific details of this serialization is up to the
|
|
* property developer. The implementation has to be synchronized with the
|
|
* Property::setStringValue method. The default implementation is a no-op.
|
|
*
|
|
* \param value The value to which the Property will be encoded
|
|
* \return \p true if the encoding succeeded, \p false otherwise
|
|
*/
|
|
virtual bool getStringValue(std::string& value) const;
|
|
|
|
/**
|
|
* This method encodes the encapsulated value of this Property as a
|
|
* <code>std::string</code>.
|
|
*
|
|
* \return the string value
|
|
*
|
|
* \throw ghoul::RuntimeError If value could not be fetched
|
|
*/
|
|
std::string getStringValue() const;
|
|
|
|
/**
|
|
* This method sets the value encapsulated by this Property by deserializing the
|
|
* passed <code>std::string</code>. The specific details of the deserialization are up
|
|
* to the Property developer. The implementation has to be synchronized with the
|
|
* Property::getLuaValue method. The default implementation is a no-op.
|
|
*
|
|
* \param value The value from which the Property will be decoded
|
|
* \return \c true if the decoding and setting of the value succeeded, \c false
|
|
* otherwise
|
|
*/
|
|
virtual bool setStringValue(std::string value);
|
|
|
|
/**
|
|
* This method registers a \p callback function that will be called every time if
|
|
* either Property:set or Property::setLuaValue was called with a value that is
|
|
* different from the previously stored value. The callback can be removed by calling
|
|
* the removeOnChange method with the OnChangeHandle that was returned here.
|
|
*
|
|
* \param callback The callback function that is called when the encapsulated type has
|
|
* been successfully changed by either the Property::set or
|
|
* Property::setLuaValue methods.
|
|
* \return An OnChangeHandle that can be used in subsequent calls to remove a callback
|
|
*
|
|
* \pre The callback must not be empty
|
|
*/
|
|
OnChangeHandle onChange(std::function<void()> callback);
|
|
|
|
/**
|
|
* This method registers a \p callback function that will be called when the property
|
|
* is destructed.
|
|
*
|
|
* \return An OnDeleteHandle that can be used in subsequent calls to remove a callback
|
|
*
|
|
* \pre The callback must not be empty
|
|
*/
|
|
OnDeleteHandle onDelete(std::function<void()> callback);
|
|
|
|
/**
|
|
* This method deregisters a callback that was previously registered with the onChange
|
|
* method. If OnChangeHandleAll is passed to this function, all registered callbacks
|
|
* are removed.
|
|
*
|
|
* \param handle An OnChangeHandle that was returned from a previous call to onChange
|
|
* by this property or OnChangeHandleAll if all callbacks should be removed.
|
|
*
|
|
* \pre \p handle must refer to a callback that has been previously registred
|
|
* \pre \p handle must refer to a callback that has not been removed previously
|
|
*/
|
|
void removeOnChange(OnChangeHandle handle);
|
|
|
|
/**
|
|
* This method deregisters a callback that was previously registered with the onDelete
|
|
* method.
|
|
*
|
|
* \param handle An OnDeleteHandle that was returned from a previous call to onDelete
|
|
* by this property.
|
|
*
|
|
* \pre \p handle must refer to a callback that has been previously registred
|
|
* \pre \p handle must refer to a callback that has not been removed previously
|
|
*/
|
|
void removeOnDelete(OnDeleteHandle handle);
|
|
|
|
/**
|
|
* This method returns the unique identifier of this Property.
|
|
*
|
|
* \return The unique identifier of this Property
|
|
*/
|
|
const std::string& identifier() const;
|
|
|
|
/**
|
|
* Returns the fully qualified name for this Property that uniquely identifies this
|
|
* Property within OpenSpace. It consists of the identifier preceded by all levels of
|
|
* PropertyOwner%s separated with <code>.</code>; for example:
|
|
* <code>owner1.owner2.identifier</code>.
|
|
*
|
|
* \return The fully qualified identifier for this Property
|
|
*/
|
|
std::string fullyQualifiedIdentifier() const;
|
|
|
|
/**
|
|
* Returns the PropertyOwner of this Property or \c nullptr, if it does not have an
|
|
* owner.
|
|
*
|
|
* \return The Property of this Property
|
|
*/
|
|
PropertyOwner* owner() const;
|
|
|
|
/**
|
|
* Assigned the Property to a new PropertyOwner. This method does not inform the
|
|
* PropertyOwner of this action.
|
|
*
|
|
* \param owner The new PropertyOwner for this Property
|
|
*/
|
|
void setPropertyOwner(PropertyOwner* owner);
|
|
|
|
/**
|
|
* Returns the human-readable GUI name for this Property that has been set in the
|
|
* constructor. This method returns the same value as accessing the metaData object
|
|
* and requesting the <code>std::string</code> stored for the <code>guiName</code>
|
|
* key.
|
|
*
|
|
* \return The human-readable GUI name for this Property
|
|
*/
|
|
const std::string& guiName() const;
|
|
|
|
/**
|
|
* This function returns a user-facing description of the Property which can be
|
|
* displayed in the user interface to inform the user what this Property does and how
|
|
* it affects the rendering.
|
|
*
|
|
* \return The description of this Property
|
|
*/
|
|
const std::string& description() const;
|
|
|
|
/**
|
|
* Sets the identifier of the group that this Property belongs to. Property groups can
|
|
* be used, for example, by GUI application to visually group different properties,
|
|
* but it has no impact on the Property itself. The default value for the \p groupID
|
|
* is <code>""</code>.
|
|
*
|
|
* \param groupId The group id that this property should belong to
|
|
*/
|
|
void setGroupIdentifier(std::string groupId);
|
|
|
|
/**
|
|
* Returns the group idenfier that this Property belongs to, or <code>""</code> if it
|
|
* belongs to no group.
|
|
* \return The group identifier that this Property belongs to
|
|
*/
|
|
std::string groupIdentifier() const;
|
|
|
|
/**
|
|
* Sets a hint about the visibility of the Property. Each application accessing the
|
|
* properties is free to ignore this hint. It is stored in the metaData Dictionary
|
|
* with the key: <code>Visibility</code>.
|
|
*
|
|
* \param visibility The new visibility of the Property
|
|
*/
|
|
void setVisibility(Visibility visibility);
|
|
|
|
/**
|
|
* Returns this Property%'s visibility setting.
|
|
*
|
|
* \return This Property%'s visibility setting
|
|
*/
|
|
Visibility visibility() const;
|
|
|
|
/**
|
|
* This method determines if this Property should be read-only in external
|
|
* applications. This setting is only a hint and does not need to be followed by GUI
|
|
* applications and does not have any effect on the Property::set,
|
|
* Property::setLuaValue, or Property::setStringValue methods. The value is stored in
|
|
* the metaData Dictionary with the key: \c isReadOnly. The default value is \c false.
|
|
*
|
|
* \param state \c true if the Property should be read only, \c false otherwise
|
|
*/
|
|
void setReadOnly(bool state);
|
|
|
|
/**
|
|
* Default view options that can be used in the Property::setViewOption method. The
|
|
* values are: Property::ViewOptions::Color = \c color,
|
|
* Property::ViewOptions::LightPosition = \c lightPosition,
|
|
* Property::ViewOptions::PowerScaledScalar = \c powerScaledScalar, and
|
|
* Property::ViewOptions::PowerScaledCoordinate = \c powerScaledCoordinate.
|
|
*/
|
|
struct ViewOptions {
|
|
static const char* Color;
|
|
static const char* LightPosition;
|
|
};
|
|
|
|
/**
|
|
* This method allows the developer to give hints to the GUI about different
|
|
* representations for the GUI. The same Property (for example Vec4Property) can be
|
|
* used in different ways, each requiring a different input method. These values are
|
|
* stored in the metaData object using the <code>views.</code> prefix in front of the
|
|
* <code>option</code> parameter. See Property::ViewOptions for a default list of
|
|
* possible options. As these are only hints, the GUI is free to ignore any suggestion
|
|
* by the developer.
|
|
* \param option The view option that should be modified
|
|
* \param value Determines if the view option should be active (<code>true</code>) or
|
|
* deactivated (<code>false</code>)
|
|
*/
|
|
void setViewOption(std::string option, bool value = true);
|
|
|
|
/**
|
|
* This method returns the state of a \p option hint. See Property::ViewOptions for a
|
|
* default list of possible options. As these are only hints, the GUI is free to
|
|
* ignore any suggestion by the developer.
|
|
*
|
|
* \param option The view option that should be retrieved
|
|
* \param defaultValue The value that is returned if the \p option was not set
|
|
*
|
|
* \return The view option's value
|
|
*/
|
|
bool viewOption(const std::string& option, bool defaultValue = false) const;
|
|
|
|
/**
|
|
* Returns the metaData that contains all information for external applications to
|
|
* correctly display information about the Property. No information that is stored in
|
|
* this Dictionary is necessary for the programmatic use of the Property.
|
|
*
|
|
* \return The Dictionary containing all meta data information about this Property
|
|
*/
|
|
const ghoul::Dictionary& metaData() const;
|
|
|
|
/**
|
|
* Convert the Property into a string containing a JSON representation of the
|
|
* Property. Includes description of the object.
|
|
*
|
|
* \return The JSON string
|
|
*/
|
|
virtual std::string toJson() const;
|
|
|
|
/**
|
|
* Get a valid JSON formatted representation of the Property's value.
|
|
*
|
|
* \return the value in a json compatible format
|
|
*/
|
|
virtual std::string jsonValue() const;
|
|
|
|
/// Interpolation methods
|
|
virtual void setInterpolationTarget(ghoul::any value);
|
|
virtual void setLuaInterpolationTarget(lua_State* state);
|
|
virtual void setStringInterpolationTarget(std::string value);
|
|
|
|
virtual void interpolateValue(float t,
|
|
ghoul::EasingFunc<float> easingFunction = nullptr);
|
|
|
|
/**
|
|
* Creates the information that is general to every Property and adds the
|
|
* \c Identifier, \c Name, \c Type, and \c MetaData keys and their values. The meta
|
|
* data is handles by the generateMetaDataDescription method, which has to be
|
|
* overloaded if a concrete base class wants to add meta data that is not curated by
|
|
* the Property class.
|
|
*
|
|
* \return The base description common to all Property classes
|
|
*/
|
|
std::string generateBaseJsonDescription() const;
|
|
|
|
/**
|
|
* Creates the information for the \c MetaData key-part of the JSON description for
|
|
* the Property. The result can be included as one key-value pair in the description
|
|
* text generated by subclasses. Only the metadata curated by the Property class is
|
|
* used in this method.
|
|
*
|
|
* \return The metadata information text for the property
|
|
*/
|
|
virtual std::string generateMetaDataJsonDescription() const;
|
|
|
|
/**
|
|
* Creates the information that is specific to each subclass of Property%s. If a
|
|
* subclass needs to add additional information into the description, it has to
|
|
* override this method and return the string containing all of the additional
|
|
* information. The base implementation of the #description method will return the Lua
|
|
* script:
|
|
* <code>return { generateBaseDescription(), generateMetaDataDescription(),</code>
|
|
* <code>generateAdditionalDescription()}</code>, which #generateMetaDataDescription
|
|
* and this method being the override points to customize the behavior.
|
|
*
|
|
* \return The information specific to each subclass of Property
|
|
*/
|
|
virtual std::string generateAdditionalJsonDescription() const;
|
|
|
|
protected:
|
|
static const char* IdentifierKey;
|
|
static const char* NameKey;
|
|
static const char* TypeKey;
|
|
static const char* DescriptionKey;
|
|
static const char* JsonValueKey;
|
|
static const char* MetaDataKey;
|
|
static const char* AdditionalDataKey;
|
|
|
|
/**
|
|
* This method must be called by all subclasses whenever the encapsulated value has
|
|
* changed and potential listeners need to be informed.
|
|
*/
|
|
void notifyChangeListeners();
|
|
|
|
/// The PropetyOwner this Property belongs to, or <code>nullptr</code>
|
|
PropertyOwner* _owner = nullptr;
|
|
|
|
/// The identifier for this Property
|
|
std::string _identifier;
|
|
|
|
/// The GUI user-facing name of this Property
|
|
std::string _guiName;
|
|
|
|
/// The user-facing description of this Property
|
|
std::string _description;
|
|
|
|
/// The Dictionary containing all meta data necessary for external applications
|
|
ghoul::Dictionary _metaData;
|
|
|
|
/// The callback function sthat will be invoked whenever the value changes
|
|
std::vector<std::pair<OnChangeHandle, std::function<void()>>> _onChangeCallbacks;
|
|
|
|
/// The callback function sthat will be invoked whenever the value changes
|
|
std::vector<std::pair<OnDeleteHandle, std::function<void()>>> _onDeleteCallbacks;
|
|
|
|
private:
|
|
void notifyDeleteListeners();
|
|
|
|
OnChangeHandle _currentHandleValue = 0;
|
|
|
|
#ifdef _DEBUG
|
|
// These identifiers can be used for debugging. Each Property is assigned one unique
|
|
// identifier.
|
|
static uint64_t Identifier;
|
|
uint64_t _id;
|
|
#endif
|
|
};
|
|
|
|
} // namespace openspace::properties
|
|
|
|
#endif // __OPENSPACE_CORE___PROPERTY___H__
|