chrome.app.window

Description: Use the chrome.app.window API to create windows. Windows have an optional frame with title bar and size controls. They are not associated with any Chrome browser windows.
Availability: Stable since Chrome 23.

Summary

Types
ContentBounds
BoundsSpecification
Bounds
FrameOptions
CreateWindowOptions
AppWindow
Methods
create chrome.app.window.create(string url, CreateWindowOptions options, function callback)
current AppWindow chrome.app.window.current()
getAll array of AppWindow chrome.app.window.getAll()
get AppWindow chrome.app.window.get(string id)
Events
onBoundsChanged
onClosed
onFullscreened
onMaximized
onMinimized
onRestored

Types

ContentBounds

properties
integer (optional) left
integer (optional) top
integer (optional) width
integer (optional) height

BoundsSpecification

properties
integer (optional) left The X coordinate of the content or window.
integer (optional) top The Y coordinate of the content or window.
integer (optional) width The width of the content or window.
integer (optional) height The height of the content or window.
integer (optional) minWidth The minimum width of the content or window.
integer (optional) minHeight The minimum height of the content or window.
integer (optional) maxWidth The maximum width of the content or window.
integer (optional) maxHeight The maximum height of the content or window.

Bounds

properties
integer left This property can be used to read or write the current X coordinate of the content or window.
integer top This property can be used to read or write the current Y coordinate of the content or window.
integer width This property can be used to read or write the current width of the content or window.
integer height This property can be used to read or write the current height of the content or window.
integer (optional) minWidth This property can be used to read or write the current minimum width of the content or window. A value of null indicates 'unspecified'.
integer (optional) minHeight This property can be used to read or write the current minimum height of the content or window. A value of null indicates 'unspecified'.
integer (optional) maxWidth This property can be used to read or write the current maximum width of the content or window. A value of null indicates 'unspecified'.
integer (optional) maxHeight This property can be used to read or write the current maximum height of the content or window. A value of null indicates 'unspecified'.
function setPosition Set the left and top position of the content or window.
Parameters
integer left
integer top
function setSize Set the width and height of the content or window.
Parameters
integer width
integer height
function setMinimumSize Set the minimum size constraints of the content or window. The minimum width or height can be set to null to remove the constraint. A value of undefined will leave a constraint unchanged.
Parameters
integer minWidth
integer minHeight
function setMaximumSize Set the maximum size constraints of the content or window. The maximum width or height can be set to null to remove the constraint. A value of undefined will leave a constraint unchanged.
Parameters
integer maxWidth
integer maxHeight

FrameOptions

properties
string (optional) type Frame type: none or chrome (defaults to chrome).
For none, the -webkit-app-region CSS property can be used to apply draggability to the app's window. -webkit-app-region: drag can be used to mark regions draggable. no-drag can be used to disable this style on nested elements.
string (optional) color Allows the frame color to be set. Frame coloring is only available if the frame type is chrome. Frame coloring is experimental and only available in dev channel.

CreateWindowOptions

properties
string (optional) id Id to identify the window. This will be used to remember the size and position of the window and restore that geometry when a window with the same id is later opened. If a window with a given id is created while another window with the same id already exists, the currently opened window will be focused instead of creating a new window.
BoundsSpecification (optional) innerBounds Used to specify the initial position, initial size and constraints of the window's content (excluding window decorations). If an id is also specified and a window with a matching id has been shown before, the remembered bounds will be used instead.

Note that the padding between the inner and outer bounds is determined by the OS. Therefore setting the same bounds property for both the innerBounds and outerBounds will result in an error.

This property is new in Chrome 36.
BoundsSpecification (optional) outerBounds Used to specify the initial position, initial size and constraints of the window (including window decorations such as the title bar and frame). If an id is also specified and a window with a matching id has been shown before, the remembered bounds will be used instead.

Note that the padding between the inner and outer bounds is determined by the OS. Therefore setting the same bounds property for both the innerBounds and outerBounds will result in an error.

This property is new in Chrome 36.
integer (optional) minWidth

minWidth is deprecated. Use innerBounds or outerBounds.

Minimum width of the window.
integer (optional) minHeight

minHeight is deprecated. Use innerBounds or outerBounds.

Minimum height of the window.
integer (optional) maxWidth

maxWidth is deprecated. Use innerBounds or outerBounds.

Maximum width of the window.
integer (optional) maxHeight

maxHeight is deprecated. Use innerBounds or outerBounds.

Maximum height of the window.
string or FrameOptions (optional) frame Frame type: none or chrome (defaults to chrome). For none, the -webkit-app-region CSS property can be used to apply draggability to the app's window. -webkit-app-region: drag can be used to mark regions draggable. no-drag can be used to disable this style on nested elements.
Use of FrameOptions is only supported in dev channel.
ContentBounds (optional) bounds

bounds is deprecated. Use innerBounds or outerBounds.

Size and position of the content in the window (excluding the titlebar). If an id is also specified and a window with a matching id has been shown before, the remembered bounds of the window will be used instead.
boolean (optional) transparentBackground Enable window background transparency. Only supported in ash. Requires experimental API permission.
enum of "normal", "fullscreen", "maximized", or "minimized" (optional) state The initial state of the window, allowing it to be created already fullscreen, maximized, or minimized. Defaults to 'normal'.
boolean (optional) hidden If true, the window will be created in a hidden state. Call show() on the window to show it once it has been created. Defaults to false.
boolean (optional) resizable If true, the window will be resizable by the user. Defaults to true.
boolean (optional) singleton

singleton is deprecated. Multiple windows with the same id is no longer supported.

By default if you specify an id for the window, the window will only be created if another window with the same id doesn't already exist. If a window with the same id already exists that window is activated instead. If you do want to create multiple windows with the same id, you can set this property to false.
boolean (optional) alwaysOnTop If true, the window will stay above most other windows. If there are multiple windows of this kind, the currently focused window will be in the foreground. Requires the "app.window.alwaysOnTop" permission. Defaults to false.
Call setAlwaysOnTop() on the window to change this property after creation.
boolean (optional) focused If true, the window will be focused when created. Defaults to true.

AppWindow

properties
function focus Focus the window.
function fullscreen Fullscreens the window.
The user will be able to restore the window by pressing ESC. An application can prevent the fullscreen state to be left when ESC is pressed by requesting the app.window.fullscreen.overrideEsc permission and canceling the event by calling .preventDefault(), like this:
window.onKeyDown = function(e) { if (e.keyCode == 27 /* ESC */) { e.preventDefault(); } };
function isFullscreen Is the window fullscreen?
Returns boolean.
function minimize Minimize the window.
function isMinimized Is the window minimized?
Returns boolean.
function maximize Maximize the window.
function isMaximized Is the window maximized?
Returns boolean.
function restore Restore the window, exiting a maximized, minimized, or fullscreen state.
function moveTo Move the window to the position (|left|, |top|).
Parameters
integer left
integer top
function resizeTo Resize the window to |width|x|height| pixels in size.
Parameters
integer width
integer height
function drawAttention Draw attention to the window.
function clearAttention Clear attention to the window.
function close Close the window.
function show Show the window. Does nothing if the window is already visible. Focus the window if |focused| is set to true or omitted.
Parameters
boolean (optional) focused
function hide Hide the window. Does nothing if the window is already hidden.
function getBounds

getBounds is deprecated. Use innerBounds or outerBounds.

Get the window's inner bounds as a ContentBounds object.
Returns ContentBounds.
function setBounds

setBounds is deprecated. Use innerBounds or outerBounds.

Set the window's inner bounds.
Parameters
ContentBounds bounds
function isAlwaysOnTop Is the window always on top?
Returns boolean.
function setAlwaysOnTop Set whether the window should stay above most other windows. Requires the "app.window.alwaysOnTop" permission.
Parameters
boolean alwaysOnTop
Window contentWindow The JavaScript 'window' object for the created child.
string id The id the window was created with.
Bounds innerBounds The position, size and constraints of the window's content, which does not include window decorations. This property is new in Chrome 36.
Bounds outerBounds The position, size and constraints of the window, which includes window decorations, such as the title bar and frame. This property is new in Chrome 36.

Methods

create

chrome.app.window.create(string url, CreateWindowOptions options, function callback)

The size and position of a window can be specified in a number of different ways. The most simple option is not specifying anything at all, in which case a default size and platform dependent position will be used.

To set the position, size and constraints of the window, use the innerBounds or outerBounds properties. Inner bounds do not include window decorations. Outer bounds include the window's title bar and frame. Note that the padding between the inner and outer bounds is determined by the OS. Therefore setting the same property for both inner and outer bounds is considered an error (for example, setting both innerBounds.left and outerBounds.left).

To automatically remember the positions of windows you can give them ids. If a window has an id, This id is used to remember the size and position of the window whenever it is moved or resized. This size and position is then used instead of the specified bounds on subsequent opening of a window with the same id. If you need to open a window with an id at a location other than the remembered default, you can create it hidden, move it to the desired location, then show it.

Parameters
string url
CreateWindowOptions (optional) options
function (optional) callback Called in the creating window (parent) before the load event is called in the created window (child). The parent can set fields or functions on the child usable from onload. E.g. background.js:
function(createdWindow) { createdWindow.contentWindow.foo = function () { }; };
window.js:
window.onload = function () { foo(); }

If you specify the callback parameter, it should be a function that looks like this:

function(AppWindow createdWindow) {...};
AppWindow createdWindow

current

AppWindow chrome.app.window.current()

Returns an AppWindow object for the current script context (ie JavaScript 'window' object). This can also be called on a handle to a script context for another page, for example: otherWindow.chrome.app.window.current().

getAll

array of AppWindow chrome.app.window.getAll()

Gets an array of all currently created app windows. This method is new in Chrome 33.

get

AppWindow chrome.app.window.get(string id)

Gets an AppWindow with the given id. If no window with the given id exists null is returned. This method is new in Chrome 33.

Parameters
string id

Events

onBoundsChanged

Fired when the window is resized.

addListener

chrome.app.window.onBoundsChanged.addListener(function callback)
Parameters
function callback

The callback parameter should be a function that looks like this:

function() {...};

onClosed

Fired when the window is closed.

addListener

chrome.app.window.onClosed.addListener(function callback)
Parameters
function callback

The callback parameter should be a function that looks like this:

function() {...};

onFullscreened

Fired when the window is fullscreened.

addListener

chrome.app.window.onFullscreened.addListener(function callback)
Parameters
function callback

The callback parameter should be a function that looks like this:

function() {...};

onMaximized

Fired when the window is maximized.

addListener

chrome.app.window.onMaximized.addListener(function callback)
Parameters
function callback

The callback parameter should be a function that looks like this:

function() {...};

onMinimized

Fired when the window is minimized.

addListener

chrome.app.window.onMinimized.addListener(function callback)
Parameters
function callback

The callback parameter should be a function that looks like this:

function() {...};

onRestored

Fired when the window is restored from being minimized or maximized.

addListener

chrome.app.window.onRestored.addListener(function callback)
Parameters
function callback

The callback parameter should be a function that looks like this:

function() {...};