goog.events.EventType.RESIZE
event when the viewport size
changes. Handlers can call goog.dom.ViewportSizeMonitor#getSize
to
get the new viewport size.
Use this class if you want to execute resize/reflow logic each time the
user resizes the browser window. This class is guaranteed to only dispatch
RESIZE
events when the pixel dimensions of the viewport change.
(Internet Explorer fires resize events if any element on the page is resized,
even if the viewport dimensions are unchanged, which can lead to infinite
resize loops.)
Example usage:
var vsm = new goog.dom.ViewportSizeMonitor(); goog.events.listen(vsm, goog.events.EventType.RESIZE, function(e) { alert('Viewport size changed to ' + vsm.getSize()); });Manually verified on IE6, IE7, FF2, Opera 11, Safari 4 and Chrome.
goog.Disposable | |
goog.events.EventTarget | goog.Disposable |
goog.dom.ViewportSizeMonitor | goog.events.EventTarget |
opt_window
: Window=
The window to monitor; defaults to the window in
which this code is executing.
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Returns the most recently recorded size of the viewport, in pixels. May
return null if no window resize event has been handled yet.
Returns: goog.math.Size
The viewport dimensions, in pixels.
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Handles window resize events by measuring the dimensions of the
viewport and dispatching a
goog.events.EventType.RESIZE event if the
current dimensions are different from the previous ones.
Arguments:
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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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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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Event listener key for window the window resize handler, as returned by
goog.events.listen .
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The most recently recorded size of the viewport, in pixels.
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The window to monitor. Defaults to the window in which the code is running.
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The object to use for event.target. Useful when mixing in an
EventTarget to another object.
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No description.
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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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Returns a viewport size monitor for the given window. A new one is created
if it doesn't exist already. This prevents the unnecessary creation of
multiple spooling monitors for a window.
Arguments:
Returns: !goog.dom.ViewportSizeMonitor
Monitor for the given window.
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Removes and disposes a viewport size monitor for the given window if one
exists.
Arguments:
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No description.
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Map of window hash code to viewport size monitor for that window, if
created.
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