Optional $currentThe object ID. Each object has its own unique $oid. It is mainly used for debugging purpose.
Trick: you can test if a JavaScript object is a ZK object by examining this property, such as `if (o.$oid) alert('o is a ZK object');`
Notice: zk.Class extends from zk.Object (so a class also has $oid)
Optional $viewStatic $oidDetermines if this object is an instance of the class represented by the specified Class parameter. Example:
if (obj.$instanceof(zul.wgt.Label, zul.wgt.Image)) {
}
Rest ...klass: any[]the Class object to be checked. Any number of arguments can be specified.
true if this object is an instance of the class
Invokes a method defined in the superclass with any number of arguments. It is like Function's call() that takes any number of arguments.
Example: ```ts multiply: function (n) { return this.$super('multiply', n + 2); } ```
the object being returned by the method of the superclass.
Invokes a method defined in the superclass with any number of arguments. It is like Function's call() that takes any number of arguments.
It is similar to ZKObject.$super, but this method works even if the superclass calls back the same member method. In short, it is tedious but safer.
Example: ```ts foo.MyClass = zk.$extends(foo.MySuper, { multiply: function (n) { return this.$super(foo.MyClass, 'multiply', n + 2); } ```
Notice that the class specified in the first argument is not the super class having the method. Rather, it is the class that invokes this method.
the object being returned by the method of the superclass.
Invokes a method defined in the superclass with an array of arguments. It is like Function's apply() that takes an array of arguments.
Example: ```ts multiply: function () { return this.$supers('multiply', arguments); } ```
the object being returned by the method of the superclass.
Invokes a method defined in the superclass with an array of arguments. It is like Function's apply() that takes an array of arguments.
It is similar to zk.Object.$supers, but this method works even if the superclass calls back the same member method. In short, it is tedious but safer.
Example: ```ts foo.MyClass = zk.$extends(foo.MySuper, { multiply: function () { return this.$supers(foo.MyClass, 'multiply', arguments); } ```
Notice that the class specified in the first argument is not the super class having the method. Rather, it is the class that invokes this method.
the object being returned by the method of the superclass.
Specifies a function that shall be called after the object is initialized, i.e., after zk.Object.$init is called. This method can be called only during the execution of zk.Object.$init.
It is an advance feature that is used to allow a base class to do something that needs to wait for all deriving classes have been initialized.
Invocation Sequence:
the function to register for execution later
Post a command to the binder
the name of the command
Optional args: Record<string, unknown>the arguments for this command. (the value should be json type)
Optional opts: EventOptionsa map of options to zk.Event, if any.
Optional timeout: numberthe time (milliseconds) to wait before sending the request.
Post a global command from the binder.
the name of the command
Optional args: Record<string, unknown>the arguments for this command. (the value should be json type)
Optional opts: EventOptionsa map of options to zk.Event, if any.
Optional timeout: numberthe time (milliseconds) to wait before sending the request.
Proxies a member function such that it can be called with this object in a context that this object is not available. It sounds a bit strange at beginning but useful when passing a member of an object that will be executed as a global function.
Example: Let us say if you want a member function to be called periodically, you can do as follows. ```ts setInterval(wgt.proxy(wgt.doIt), 1000); //assume doIt is a member function of wgt ```
With proxy, when doIt is called, this references to wgt. On the other hand, the following won't work since this doesn't reference to wgt, when doIt is called. ```ts setInterval(wgt.doIt, 1000); //WRONG! doIt will not be called with wgt ```
Notice that this method caches the result so that it will return the same proxied function, if you pass the same function again.
a function that can be called as a global function
(that actually have this referencing to this object).
Static isDetermines if the class by this Class object is either the same as, or is a superclass of, the class represented by the specified Class parameter. Example:
if (klass1.isAssignableFrom(klass2)) {
}
the Class object to be checked, such as zk.Widget.
true if assignable
Static isDetermines if the specified Object is assignment-compatible with this Class. This method is equivalent to [[zk.Object#$instanceof]. Example:
if (klass.isInstance(obj)) {
}
the object to check
true if the object is an instance
Static postPost a command to the binder from the give dom element.
the target of the dom element.
the name of the command
Optional args: Record<string, unknown>the arguments for this command. (the value should be json type)
Optional opt: EventOptionsa map of options to zk.Event, if any.
Optional timeout: numberthe time (milliseconds) to wait before sending the request.
Static postPost a global command from the binder of the give dom element.
the target of the dom element.
the name of the command
Optional args: Record<string, unknown>the arguments for this command. (the value should be json type)
Optional opt: EventOptionsOptional timeout: numberthe time (milliseconds) to wait before sending the request.
A data binder utile widget.
Import
global.File
Since
8.0.0