According to my previous post with popups hanging, now I'm trying to bypass
this strange behaviour using loading JavaScript image not by image.src=URL
but straight away from stream using HTTP GET method.
The problem is, how to assign stream from downloaded image (ex. GIF89a) to a
JavaScript Image object ? Code:
I've search far and wide for an answer, so forgive me if this is a
stupid question. (Well, it probably is.)
Consider the following javascript:
var foo = new Image();
foo.src = "http://some.server.com/some_filename.gif";
Now, the browser will retrieve 'some_filename.gif' from some.server.com
and put it into the object foo. What I want to do is then subsequently
analyze the actual binary data contained inside some_filename.gif.
(Specifically, I just need to look at the first few bytes.) Is there
any way to do this in just JavaScript?
I'm trying to get the binary data of an image object.
I've found articles to writing binary to be the source of an image, but they don't tell you how to do the reverse. Pretty much, after the page loads I want to do something like.
myImg = document.getElementById('cow.jpg');
binData = myImg.somethingToGetBinaryDataPlese
For those that are curious why I'm doing this its for another project I'm working on where I store the binary data somewhere else after load, but for technical reasons this has to be done client side for if I do it server side I'm not getting the results I need for this project.
Im trying to implement dynamic images on my site. Basically, there is a list box, and when the user selects an option, it calls a service that streams back a base64 encoded image that will be the preview of what they're looking at.in FF you can do this: img.src = "data:image/png;base64," + args ; This doesnt work for IE. from what ive learned, IE doesnt support this type of inline coding.
I was thinking that maybe the next best solution would be to convert the base64 back into binary, and set the new image object to that source. something like this:
Code:
var img = new image();
img.source = binarydata;
now obviously, img.source isnt a real method. but i would like to be ale to set the binary data as the image.
possiblities: Is there anyway to save that binary as a file on the client? and then be able to reference that file as the picture img.src = "images/" + newfilename;
Some other alternatives is to stream back a reference on the server to get the picture, this would require two callbacks, which i dont want.
Also, there is a method of turning the image into a big array of HTMl elements, and each element holds a color, being a pixel. im not doing that, that is the biggest hack job i have ever seen.
I am using javascript as the scripting language in an asp page. I would like to write the binary image into the web page using javascript. I am able to do this using vbscript as below,<%@ Language=VBScript %>
[Code]...
Can assign a new function to a built-in object in Firefox:
But IE and Opera don't have a MouseEvent or HTMLElement that can be set up in the same way. Can you do this in IE or Opera, or just Firefox, and maybe Webkit?
How is it possible to take the value of a variable (in this case,
MODE_CREATE, MODE_UPDATE, etc) and use that as an object property name?
In the following example I want 'oIcon' object to have the properties:
mode1, mode2, and mode3.
This seems simple but I can't quite figure it out...
Any ideas anyone?
var MODE_CREATE = "mode1";
var MODE_UPDATE = "mode2";
var MODE_DELETE = "mode3";
var oIcon = {
MODE_CREATE: "create.gif"
, MODE_UPDATE: "update.gif"
, MODE_DELETE: "delete.gif"
};
var oTitle = {
MODE_CREATE: "Create a new item..."
, MODE_UPDATE: "Update this item..."
, MODE_DELETE: "Delete this item..."
};
I have a window with a form that is accessed directly. I would like to pop open another window from it and make the new window the parent/opener. I've tried the following but I keep getting 'opener is null' after trying to access the new parent's Javascript methods.
Code:
childWindow = window.open(someUrl);
window.opener = childWindow;
...
opener.someMethodInNewParent();
Am I going about it the correct way? Or is it not even possible to create a window and assign it as an opener to an existing window?
I was wondering if the following would be a valid JavaScript
assignment vor a variable and if anybody knows this to work in IE6 or
lower?
var someVar = (typeof(someVar) === Object) ? this : getVar();
function getVar(){
alert('getVar() called');
return(true);
}
alert(someVar);
alert(someVar);
It seems to be working in FF 2 an Safari 3.
I am creating a form using html5 and javascript. Am using <input type = file> tag to browse and display the image file. I need to convert the image file to binary file to store it in web database.
Is there any method to convert image file to binary file.
I am creating a form using html5 and javascript. I need to display user image and am using <input type=file> tag to browse the image file. Now I need to convert the image file to binary file to store it in the web database.
Is there any method in javascript for binary conversion.. convert image file to binary file.
I have a form with a file upload field. When you hit submit the file should be manipulated by the client browser and not sent to the server (!). This is important. No file transfer to the Server. After the manipulation the file should be presented as download-able to the client. Which means it is stored from the browser to the client filesystem.
I do not know if any JavaScript Framework is capable of doing this.?
Within my Flex application I write stuff to the browser via a javascript document write.Is there a command to send to indicate I want to close that stream? When I send the command the rotating indicator keeps running indicating the browser is still expecting some stuff. If I click the stop button on the browser it stops spinning and the stuff I sent (an xml stream) becomes available. As this is an automated process, there is no person to hit the stop button.
View 2 Replies View RelatedI'm trying to create a mobile app for an internet station (http:url....), and right now I'm just trying to get how to get it to play.I've got it to connect to an MP3 file and it works just like I want it to. However, upon setting it to connect to the stream, it returns with "java.io.IOException: failed to connect to http://71.127.84.92:8004 : response does not start with HTTP it starts with: ICY".Here is the code:
public void commandAction(Command command, Displayable displayable) {
if (command == stopButton){
if (isPlaying == true) {[code]......
Is that possible I can assign an window object variable to an already opened
window? With window.open(), we can get a window object from opened window.
If a window has already opened, is there any way I can attach that window
with an object variable in javascript? Because I want to communicate with
that window.
I need Media player to stream and play video in javascript..
My requirement is I have .wmv files but when i embed them in html pages first it gets downloaded and then it gets played.
I need them playing while they are getting downloaded.
im trying to load url for Shoutcast Stream [URL] with jMediaelement plugin[URL],
View 8 Replies View RelatedI have a very simple web page that is comprised of the same image over and over again. I have it to when you click on it, it swaps the image out and adds 1 to the counter. I need it to subtract 1 when you click it again.
<script type="text/javascript">
var namesVec = new Array("block.png", "block_hover.png");
var root='images/';
function swapImg(ima){
// divides the path
nr = ima.getAttribute('src').split('/');
// gets the last part of path, ie name
[Code]...
I mean, is there a way to assign "add 1 when clicked" or "subtract 1 when clicked" to image properties?
I am looking for the best performing solution for modifying and
iterating an object graph in JavaScript. I have outlined below a
simplified example of the object model and examples of how I will be
using this graph.
Object model:
Two objects, [BadApples] and [GoodApples] each contains a collection of
[Apple] items (500 max). [Apple] simply has an ID and a name.
Requirements:
A quick way of determining whether a certain apple exists in either
[GoodApples] or [BadApples] (by ID).
A quick way of iterating through [GoodApples] and [BadApples] in order
to update the web page.
A way of moving a certain [Apple] (by ID) between [GoodApples] and
[BadApples].
I currently have this implemented using arrays, but iterating these
arrays is expensive. Is there an implementation of a binary-tree for
JavaScript? The real-world application may contain many hundreds of
nodes, and performance is crucial.
I'm reading the content of a local binary file with the method mentioned here: [URL]
Then I'm getting the data as a string where each character represents the binary value. I have successfully sent that string with Mozilla's XmlHttpRequest's sendAsBinary method, but IE 7's version doesn't have that method...
Using the send method almost works, the only problem is that binary content can be represented as the asciicode 0. This means that the string read by sent is cut off as soon as it is encountered. That means that the part before the first NULL character (asciicode = 0) is successfully sent to the server.
The solution I have made right now is to increment each character's asciicode on the client side by one and decrement them on the server before converting the character to the binary representation. The downside with this is that the size of the data sent between the client and server gets larger than the original filesize. Ex: 8kb file grows to ~12kb.
I am trying to convert binary to decimal with this function but it doesn't convert to decimal, but does decimal to binary.
Code:
function bin2dec() {
var x = document.getElementById("bin").value;
if ((/[^0-1]/g.test(x)) || x == "") {
alert ("You must enter an integer binary number!");
document.getElementById("bin").value = "";
document.getElementById("bin").focus();
return false;
}
x = parseInt(x);
var dec = x.toString(10);
var hex = x.toString(16).toUpperCase();
var octal = x.toString(8);
var figs = "The decimal representation of " + x + " is " + dec + "<br>";
figs = figs + "The hexadecimal representation of " + x + " is " + hex + "<br>";
figs = figs + "The octal representation of " + x + " is " + octal + "<br>";
document.getElementById("result").innerHTML = figs;
}
I was looking at a page called Javascript: Convert Strings to Binary (and representing in a nerdy way!) where you can convert a String into binary dots using Javascript and I loved that, but how I can do that? Since the code isn't for making that grid...
View 3 Replies View Relatedneed convert decimal to binary and viser versa using on change attribute.
View 16 Replies View RelatedI am making a small gallery script. When a user clicks an image, I would like for a function to be called that tells the browser where that image is located in an object. For example:
[Code]...
It works, I just don't like it because it is messy and it seems sensible that some workaround exists.
I'm using a form on a page as a vessel for data, rather than to actually submit it. The reason is that the form is submitted to a service at www.rdbhost.com with it's special JS API, so I extract the data from the form manually and then feed the data to the methods from the provided library.
One of the field is a file. Calling ``.val()`` on it simply gives me the file name, but I need the contents.I've looked around, and found a few plugins that would actually send the file, but that's not what I want.
I am writing a program that will take user input and convert the 8 digits the user enters (the 0's and 1's) and converts them into an integer between 0 and 255. It is a very simple program but I am still having some errors :
import javax.swing.*;
public class BinaryToInteger
{
static String userInput = JOptionPane.showInputDialog("Enter a binary number with 8 integers to convert.");//Dialog Box that asks for user input
static int binaryValue = Integer.parseInt(userInput);//Parses the user's input into an integer
[Code]...