Package org.gnome.gtk

Class PropertyExpression

java.lang.Object

org.javagi.base.ProxyInstance

org.gnome.gobject.TypeInstance

org.gnome.gtk.Expression

org.gnome.gtk.PropertyExpression

All Implemented Interfaces:

Proxy

@Generated("io.github.jwharm.JavaGI")
public class PropertyExpression
extends Expression

A GObject property value in a GtkExpression.

Nested Class Summary

Nested classes/interfaces inherited from class org.gnome.gtk.Expression

Expression.Expression$Impl

Constructor Summary

Constructors

Constructor	Description
PropertyExpression(MemorySegment address)	Create a PropertyExpression proxy instance for the provided memory address.
PropertyExpression(Type thisType, @Nullable Expression expression, String propertyName)	Creates an expression that looks up a property.

Method Summary

Modifier and Type	Method	Description
protected PropertyExpression	asParent()	Returns this instance as if it were its parent type.
static PropertyExpression	forPspec(@Nullable Expression expression, ParamSpec pspec)	Creates an expression that looks up a property.
@Nullable Expression	getExpression()	Gets the expression specifying the object of a property expression.
ParamSpec	getPspec()	Gets the GParamSpec specifying the property of a property expression.
static @Nullable Type	getType()	Get the GType of the PropertyExpression class

Methods inherited from class org.gnome.gtk.Expression

bind, evaluate, getValueType, isStatic, ref, unref, watch

Methods inherited from class org.gnome.gobject.TypeInstance

callParent, callParent, cast, getMemoryLayout, getPrivate, readGClass, writeGClass

Methods inherited from class org.javagi.base.ProxyInstance

equals, handle, hashCode

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

PropertyExpression

public PropertyExpression(MemorySegment address)

Create a PropertyExpression proxy instance for the provided memory address.

Parameters:

address - the memory address of the native object

PropertyExpression

public PropertyExpression(Type thisType,
 @Nullable Expression expression,
 String propertyName)

Creates an expression that looks up a property.

The object to use is found by evaluating the expression, or using the this argument when expression is NULL.

If the resulting object conforms to this_type, its property named property_name will be queried. Otherwise, this expression's evaluation will fail.

The given this_type must have a property with property_name.

Parameters:

thisType - The type to expect for the this type

expression - Expression to evaluate to get the object to query or NULL to query the this object

propertyName - name of the property

Method Details

getType

public static @Nullable Type getType()

Get the GType of the PropertyExpression class

Returns:

the GType

asParent

protected PropertyExpression asParent()

Returns this instance as if it were its parent type. This is mostly synonymous to the Java super keyword, but will set the native typeclass function pointers to the parent type. When overriding a native virtual method in Java, "chaining up" with super.methodName() doesn't work, because it invokes the overridden function pointer again. To chain up, call asParent().methodName(). This will call the native function pointer of this virtual method in the typeclass of the parent type.

Overrides:

asParent in class Expression

forPspec

public static PropertyExpression forPspec(@Nullable Expression expression,
 ParamSpec pspec)

Creates an expression that looks up a property.

The object to use is found by evaluating the expression, or using the this argument when expression is NULL.

If the resulting object conforms to this_type, its property specified by pspec will be queried. Otherwise, this expression's evaluation will fail.

Parameters:

expression - Expression to evaluate to get the object to query or NULL to query the this object

pspec - the GParamSpec for the property to query

Returns:

a new GtkExpression

getExpression

public @Nullable Expression getExpression()

Gets the expression specifying the object of a property expression.

Returns:

the object expression

getPspec

public ParamSpec getPspec()

Gets the GParamSpec specifying the property of a property expression.

Returns:

the GParamSpec for the property