IFrame.js

Summary

IFrame.js
Constants
OpenLayers.Tile.Image.IFrame	Mixin for tiles that use form-encoded POST requests to get images from remote services.
Properties
useIFrame	{Boolean} true if we are currently using an IFrame to render POST responses, false if we are using an img element to render GET responses.
Functions
draw	Set useIFrame in the instance, and operate the image/iframe switch.
getImage	Creates the content for the frame on the tile.
createRequestForm	Create the html <form> element with width, height, bbox and all parameters specified in the layer params.
setImgSrc	Sets the source for the tile image
onImageLoad	Handler for the image onload event
createBackBuffer	Override createBackBuffer to do nothing when we use an iframe.

Constants

OpenLayers.Tile.Image.IFrame

Mixin for tiles that use form-encoded POST requests to get images from remote services. Images will be loaded using HTTP-POST into an IFrame.

This mixin will be applied to OpenLayers.Tile.Image instances configured with OpenLayers.Tile.Image.maxGetUrlLength set.

Properties

useIFrame

{Boolean} true if we are currently using an IFrame to render POST responses, false if we are using an img element to render GET responses.

Functions

draw

draw: function()

Set useIFrame in the instance, and operate the image/iframe switch. Then call Tile.Image.draw.

Returns

{Boolean}

getImage

getImage: function()

Creates the content for the frame on the tile.

createRequestForm

createRequestForm: function()

Create the html <form> element with width, height, bbox and all parameters specified in the layer params.

Returns

{DOMElement} The form element which sends the HTTP-POST request to the WMS.

setImgSrc

setImgSrc: function( url )

Sets the source for the tile image

Parameters

url

{String}

onImageLoad

onImageLoad: function()

Handler for the image onload event

createBackBuffer

createBackBuffer: function()

Override createBackBuffer to do nothing when we use an iframe. Moving an iframe from one element to another makes it necessary to reload the iframe because its content is lost. So we just give up.

Returns

{DOMElement}