Union::Properties::SizePropertyGroup Class

Member Function Documentation

SizePropertyGroup::SizePropertyGroup()

Default constructor. Constructs a null instance.

A null instance in this case means an instance that does not have any values for its properties. This includes property groups.

SizePropertyGroup::SizePropertyGroup(const Union::Properties::SizePropertyGroup &other)

Copy constructor.

SizePropertyGroup::SizePropertyGroup(Union::Properties::SizePropertyGroup &&other)

Move constructor.

std::optional<qreal> SizePropertyGroup::bottom() const

The size of the bottom side.

See also setBottom().

[static] std::unique_ptr<Union::Properties::SizePropertyGroup> SizePropertyGroup::empty()

Create and return an empty SizePropertyGroup instance.

This will create an empty SizePropertyGroup instance, which is defined as an instance with all of its values default-constructed. Note that this is different from a default-constructed instance which will have all its values unset.

bool SizePropertyGroup::hasAnyValue() const

Returns if this property group has any value set.

Note that for any property that is also a property group, this will also check if that group has any value.

bool SizePropertyGroup::isEmpty() const

Returns if this property is considered empty.

A property is considered empty if it has no values or if the values it contains are all considered empty values.

std::optional<qreal> SizePropertyGroup::left() const

The size of the left side.

See also setLeft().

[static] void SizePropertyGroup::resolveProperties(const Union::Properties::SizePropertyGroup *source, Union::Properties::SizePropertyGroup *destination)

Copy property values from source to destination if destination does not have a property value.

This will recursively copy property values of grouped properties.

source The source property group to copy from. destination The destination property group to copy to.

std::optional<qreal> SizePropertyGroup::right() const

The size of the right side.

See also setRight().

template <typename T, typename... LookupFunctions> requires (std::is_member_function_pointer_v<LookupFunctions> && ...) T SizePropertyGroup::safePropertyLookup(const T &defaultValue, LookupFunctions... functions) const

Perform safe property lookup of a property or the property of a subgroup.

This should be called with a list of property getter pointer-to-member functions in functions that indicate which properties to access. Each subgroup access will be checked to make sure the subgroup exists. If any of them does not exist, defaultValue will be returned. The final property lookup can be any member function of the final group. If that returns a pointer or std::optional<>, it is checked to see if it has a value. If it does, that value is returned. If not, defaultValue is returned. For functions returning anything else, the value returned by the function is returned.

Example usage:

// Lookup the value of the property "spacing" of the "layout" group.
auto spacing = StylePropertyGroup->safePropertyLookup(0.0, &StylePropertyGroup::layout, &LayoutPropertyGroup::spacing);

void SizePropertyGroup::setBottom(const std::optional<qreal> &newValue)

Set the value of bottom.

newValue The new value or std::nullopt to unset the value.

See also bottom().

void SizePropertyGroup::setLeft(const std::optional<qreal> &newValue)

Set the value of left.

newValue The new value or std::nullopt to unset the value.

See also left().

void SizePropertyGroup::setRight(const std::optional<qreal> &newValue)

Set the value of right.

newValue The new value or std::nullopt to unset the value.

See also right().

void SizePropertyGroup::setTop(const std::optional<qreal> &newValue)

Set the value of top.

newValue The new value or std::nullopt to unset the value.

See also top().

QMarginsF SizePropertyGroup::toMargins() const

Convert a Size property to QMarginsF.

If any values are not set, they will use 0.0.

QString SizePropertyGroup::toString(int indentation = 0, Union::Properties::ToStringFlags flags = ToStringFlags{}) const

Returns a string representation of this property group.

This is intended for debugging.

indentation The amount of indentation to apply. Defaults to 0. flags A set of flags that control conversion behavior.

std::optional<qreal> SizePropertyGroup::top() const

The size of the top side.

See also setTop().

Union::Properties::SizePropertyGroup &SizePropertyGroup::operator=(Union::Properties::SizePropertyGroup &&other)

Move assignment operator.

Union::Properties::SizePropertyGroup &SizePropertyGroup::operator=(const Union::Properties::SizePropertyGroup &other)

Copy assignment operator.