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The QtVariantPropertyManager class provides and manages QVariant based properties. More...
#include <QtVariantPropertyManager>
Inherits QtAbstractPropertyManager.
The QtVariantPropertyManager class provides and manages QVariant based properties.
QtVariantPropertyManager provides the addProperty() function which creates QtVariantProperty objects. The QtVariantProperty class is a convenience class handling QVariant based properties inheriting QtProperty. A QtProperty object created by a QtVariantPropertyManager instance can be converted into a QtVariantProperty object using the variantProperty() function.
The property's value can be retrieved using the value(), and set using the setValue() slot. In addition the property's type, and the type of its value, can be retrieved using the propertyType() and valueType() functions respectively.
A property's type is a QVariant::Type enumerator value, and usually a property's type is the same as its value type. But for some properties the types differ, for example for enums, flags and group types in which case QtVariantPropertyManager provides the enumTypeId(), flagTypeId() and groupTypeId() functions, respectively, to identify their property type (the value types are QVariant::Int for the enum and flag types, and QVariant::Invalid for the group type).
Use the isPropertyTypeSupported() function to check if a particular property type is supported. The currently supported property types are:
Each property type can provide additional attributes, e.g. QVariant::Int and QVariant::Double provides minimum and maximum values. The currently supported attributes are:
| Property Type | Attribute Name | Attribute Type |
|---|---|---|
| int | minimum | QVariant::Int |
| maximum | QVariant::Int | |
| singleStep | QVariant::Int | |
| double | minimum | QVariant::Double |
| maximum | QVariant::Double | |
| singleStep | QVariant::Double | |
| decimals | QVariant::Int | |
| QString | regExp | QVariant::RegExp |
| QDate | minimum | QVariant::Date |
| maximum | QVariant::Date | |
| QPointF | decimals | QVariant::Int |
| QSize | minimum | QVariant::Size |
| maximum | QVariant::Size | |
| QSizeF | minimum | QVariant::SizeF |
| maximum | QVariant::SizeF | |
| decimals | QVariant::Int | |
| QRect | constraint | QVariant::Rect |
| QRectF | constraint | QVariant::RectF |
| decimals | QVariant::Int | |
| enum | enumNames | QVariant::StringList |
| enumIcons | iconMapTypeId() | |
| flag | flagNames | QVariant::StringList |
The attributes for a given property type can be retrieved using the attributes() function. Each attribute has a value type which can be retrieved using the attributeType() function, and a value accessible through the attributeValue() function. In addition, the value can be set using the setAttribute() slot.
QtVariantManager also provides the valueChanged() signal which is emitted whenever a property created by this manager change, and the attributeChanged() signal which is emitted whenever an attribute of such a property changes.
See also QtVariantProperty and QtVariantEditorFactory.
Creates a manager with the given parent.
Destroys this manager, and all the properties it has created.
Creates and returns a variant property of the given propertyType with the given name.
If the specified propertyType is not supported by this variant manager, this function returns 0.
Do not use the inherited QtAbstractPropertyManager::addProperty() function to create a variant property (that function will always return 0 since it will not be clear what type the property should have).
See also isPropertyTypeSupported().
This signal is emitted whenever an attribute of a property created by this manager changes its value, passing a pointer to the property, the attribute and the new value as parameters.
See also setAttribute().
Returns the type of the specified attribute of the given propertyType.
If the given propertyType is not supported by this manager, or if the given propertyType does not possess the specified attribute, this function returns QVariant::Invalid.
See also attributes() and valueType().
Returns the given property's value for the specified attribute
If the given property was not created by this manager, or if the specified attribute does not exist, this function returns an invalid variant.
See also attributes(), attributeType(), and setAttribute().
Returns a list of the given propertyType 's attributes.
See also attributeValue() and attributeType().
Returns the type id for an enum property.
Note that the property's value type can be retrieved using the valueType() function (which is QVariant::Int for the enum property type).
See also propertyType() and valueType().
Returns the type id for a flag property.
Note that the property's value type can be retrieved using the valueType() function (which is QVariant::Int for the flag property type).
See also propertyType() and valueType().
Returns the type id for a group property.
Note that the property's value type can be retrieved using the valueType() function (which is QVariant::Invalid for the group property type, since it doesn't provide any value).
See also propertyType() and valueType().
Returns the type id for a icon map attribute.
Note that the property's attribute type can be retrieved using the attributeType() function.
See also attributeType() and QtEnumPropertyManager::enumIcons().
Returns true if the given propertyType is supported by this variant manager; otherwise false.
See also propertyType().
Returns the given property's type.
See also valueType().
Sets the value of the specified attribute of the given property, to value.
The new value's type must be of the type returned by attributeType(), or of a type that can be converted to attributeType() using the QVariant::canConvert() function, otherwise this function does nothing.
See also attributeValue(), QtVariantProperty::setAttribute(), and attributeChanged().
Sets the value of the given property to value.
The specified value must be of a type returned by valueType(), or of type that can be converted to valueType() using the QVariant::canConvert() function, otherwise this function does nothing.
See also value(), QtVariantProperty::setValue(), and valueChanged().
Returns the given property's value.
If the given property is not managed by this manager, this function returns an invalid variant.
See also setValue().
This signal is emitted whenever a property created by this manager changes its value, passing a pointer to the property and the new value as parameters.
See also setValue().
Returns the given property's value type.
See also propertyType().
This is an overloaded function.
Returns the value type associated with the given propertyType.
Returns the given property converted into a QtVariantProperty.
If the property was not created by this variant manager, the function returns 0.
See also createProperty().
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