I am new with jquery , i have a small project about display image with canvas. All will good , but i have a trouble when try display all image , i try to use .each(function) or loop but not work
This is my trouble , any one can help ?. Thanks
http://jsfiddle.net/NcKfr/6/
<textarea id="textid">blah blah blah</textarea>
<canvas id="ca1" width="640" height="480"></canvas>
<script>
$(document.body).find('*').each(function() {
var tmp = $("textarea").children().remove();
var text = $("textarea").text();
text = text.replace(/<li>/g, "").replace(/<\/li>/g, "").replace(/<br \/>/g, "").replace(/\/>/g, "").replace(/<img/g, "").replace(/ /g, "");
$("textarea").text(text);
$("textarea").append(tmp);
});
</script>
Sc开发者_如何学Goript code :
$(function(e) {
var data = $("#textid").val();
rows = data.split('src="');
partNum = [];
var i;
var len = rows.length;
var can = document.getElementsByTagName('canvas')[0];
var ctx = can.getContext('2d');
$(document).ready(function() {
for (i = 1; i < len; i++) {
partNum[i] = rows[i].substr(0,rows[i].indexOf('"'));
$.getImageData({
url: partNum[i],
success: function(image) {
// Set the canvas width and heigh to the same as the image
$(can).attr('width', image.width);
$(can).attr('height', image.height);
$(can).css({
'background-color': 'none',
'border-color': '#fff'
});
// Draw the image on to the canvas
ctx.drawImage(image, 0, 0, image.width, image.height);
},
error: function(xhr, text_status) {
// Handle your error here
}
});
}
});
});
success: function(image) {
script = document.createElement('canvas'); var can = document.body.appendChild(script);
If i change code in two line , i can show all image but i can control it load form 1 to 13. Any body can help me fix it ... thanks
Here is a code which will draw images on one canvas one under another.
var url = "http://farm4.static.flickr.com/",
urls = [
"3002/2758349058_ab6dc9cfdc_z.jpg",
"2445/5852210343_d21767f18d.jpg"],
can = $('#canvas').get(0),
ctx = can.getContext('2d'),
canH = 0,
canW = 0,
h = 0,
images = [],
size = urls.length;
// loop via all images
$.each(urls, function (index, img) {
$.getImageData({
url: url + img,
success: function (image) {
images.push(image);
canH += image.height;
canW = Math.max(canW, image.width);
if (images.length === size) {
can.width = canW;
can.height = canH;
$.each(images, function (i, img) {
ctx.drawImage(img, 0, h);
h += img.height;
});
}
}
});
});
You can also check this: http://jsfiddle.net/HcxG3/6/ (looks like the service behind getImageData is currently down).
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