goog.Disposable | |
goog.events.EventTarget | goog.Disposable |
goog.labs.style.PixelDensityMonitor | goog.events.EventTarget |
opt_domHelper
: !goog.dom.DomHelper=
The DomHelper which contains the
document associated with the window to listen to. Defaults to the one in
which this code is executing.
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Returns: goog.labs.style.PixelDensityMonitor.Density
The density for the
window.
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Handles a change to the media query and checks whether the density has
changed since the last call.
Arguments:
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No description.
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Starts monitoring for changes in pixel density.
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Use
#listen instead, when possible. Otherwise, use
goog.events.listen if you are passing Object
(instead of Function) as handler.
Adds an event listener to the event target. The same handler can only be
added once per the type. Even if you add the same handler multiple times
using the same type then it will only be called once when the event is
dispatched.
Arguments:
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Asserts that the event target instance is initialized properly.
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No description.
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Removes listeners from this object. Classes that extend EventTarget may
need to override this method in order to remove references to DOM Elements
and additional listeners.
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Returns the parent of this event target to use for bubbling.
Returns: goog.events.EventTarget
The parent EventTarget or null if
there is no parent.
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Use
#unlisten instead, when possible. Otherwise, use
goog.events.unlisten if you are passing Object
(instead of Function) as handler.
Removes an event listener from the event target. The handler must be the
same object as the one added. If the handler has not been added then
nothing is done.
Arguments:
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Sets the parent of this event target to use for capture/bubble
mechanism.
Arguments:
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Sets the target to be used for
event.target when firing
event. Mainly used for testing. For example, see
goog.testing.events.mixinListenable .
Arguments:
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Invokes a callback function when this object is disposed. Callbacks are
invoked in the order in which they were added.
Arguments:
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Disposes of the object. If the object hasn't already been disposed of, calls
#disposeInternal . Classes that extend goog.Disposable should
override #disposeInternal in order to delete references to COM
objects, DOM nodes, and other disposable objects. Reentrant.
Returns: void
Nothing.
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Deletes or nulls out any references to COM objects, DOM nodes, or other
disposable objects. Classes that extend
goog.Disposable should
override this method.
Not reentrant. To avoid calling it twice, it must only be called from the
subclass' disposeInternal method. Everywhere else the public
dispose method must be used.
For example:
mypackage.MyClass = function() { mypackage.MyClass.base(this, 'constructor'); // Constructor logic specific to MyClass. ... }; goog.inherits(mypackage.MyClass, goog.Disposable); mypackage.MyClass.prototype.disposeInternal = function() { // Dispose logic specific to MyClass. ... // Call superclass's disposeInternal at the end of the subclass's, like // in C++, to avoid hard-to-catch issues. mypackage.MyClass.base(this, 'disposeInternal'); }; |
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Use
#isDisposed instead.
No description.
Returns: boolean
Whether the object has been disposed of.
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No description.
Returns: boolean
Whether the object has been disposed of.
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Associates a disposable object with this object so that they will be disposed
together.
Arguments:
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No description.
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The last density that was reported so that changes can be detected.
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The media query list for a query that detects high density, if supported
by the browser. Because matchMedia returns a new object for every call, it
needs to be saved here so the listener can be removed when disposing.
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No description.
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The object to use for event.target. Useful when mixing in an
EventTarget to another object.
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Maps of event type to an array of listeners.
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Parent event target, used during event bubbling.
TODO(user): Change this to goog.events.Listenable. This
currently breaks people who expect getParentEventTarget to return
goog.events.EventTarget.
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Media query that matches for high density.
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Minimum ratio between device and screen pixel needed for high density mode.
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No description.
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The two different pixel density modes on which the various ratios between
physical and device pixels are mapped.
Constants:
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The events fired by the PixelDensityMonitor.
Constants:
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