using IronBarCode;
GeneratedBarcode barcode = QRCodeWriter.CreateQrCodeWithLogo("3255842", #"stack.jpg", 500);
ser.InnerHtml += barcode.ToHtmlTag();
How can I access and resize the logo image?
You can size your logo before loading, or logo you specify in the IronBarcode QRCodeWriter.CreateQrCodeWithLogo method will automatically be sized appropriately and snapped to the QR grid.
The Advanced QR Code Writing code example shows the additional QR creation options exposed when using QRCodeWriter instead of BarcodeWriter.CreateBarcode
See the code example below:
using IronBarCode;
GeneratedBarcode QRWithLogo = QRCodeWriter.CreateQrCodeWithLogo("3255842", #"stack.jpg");
//can also set margins, background color
QRWithLogo.ResizeTo(500, 500).SetMargins(10).ChangeBarCodeColor(Color.DarkGreen);
ser.InnerHtml += QRWithLogo.ToHtmlTag();
Disclaimer: I work for Iron Software.
Related
I have Matlab 2019b, GUI Layout Toolbox 2.3.4 and t all runs on MacOs 14 Mojave.
I want to create button in in a UI that have icons/images instead of text. I have seen here:
https://undocumentedmatlab.com/blog/html-support-in-matlab-uicomponents/
that it is supposed to be possible to use HTML to render the button contents.
So - I try this sample code:
figure('MenuBar','none','Name','GUI-TEST','NumberTitle','off','Position',[200,200,140,90]);
push_btn = uicontrol('Style','PushButton','String','Push','Position',[30,60,80,20],...
'CallBack','disp(''You are pressed a push button'')');
close_btn = uicontrol('Style','PushButton','String','Close','Position',[30,5,80,50],...
'CallBack','close');
icon_file = fullfile(pwd, 'close.png')
str = ['<html><img src="file://' icon_file '"></html>']
set(close_btn,'String',str);
but it leaves me with an empty button.
If I deliberately use a filename that does not correspond to an existing file, I see a broken image icon:
So I am reasonably sure that the basic syntax and file path stuff is correct but the image does not get rendered in the button.
Is there something else I need to do to make this work or is it all just part of Matlab's overwhelming strangeness?
The easiest way to put an image on a uicontrol (and specifically a button), is to use the CData property,
im_orig = imread(icon_file); % Needs to be true color, i.e. MxNx3
im_sized = imresize(im_orig,[80,50]); % size of the button
% str = ['<html><img src="file://' icon_file '"></html>'];
% set(close_btn,'String',str);
set(close_btn,'CData',im_sized);
I need that when a user click a button. The dress changes. There are separate files for the dress and the body.
I added a custom code on a tap/click event on GWD which is this
document.getElementById("body").src = "Skin-Fair(Ivory).png";
document.getElementById("body").source = "Skin-Fair(Ivory).png";
What happens is that there is a placeholder when I click the button but it never makes the intended image appear.
This is a minimum example of how to change an image source with a button.
I strongly recommend you take a basic web dev course: https://github.com/bmorelli25/Become-A-Full-Stack-Web-Developer
document.getElementById('bt').addEventListener('click', function () {
document.getElementById('im').src = 'https://placeholdit.imgix.net/~text?txtsize=18&bg=FF6347&txtclr=ffffff&txt=New-Image&w=250&h=50';
});
<button id="bt">Button</button>
<img id="im" src="https://placeholdit.imgix.net/~text?txtsize=18&bg=FF6347&txtclr=ffffff&txt=Placeholder-Image&w=250&h=50">
No coding skills required for that using GWD.
I assume you have imported all your images in GWD project.
You should use the timeline and create two different keyframes.
Set the opacity to 0 to hide the unwanted assets in your keyframes.
Add an event on tap/click and set it to go to the keyframe/page you want.
This is my first question here so I apologize if it's not in the right formt. I don't know why but images work perfectly fine in my desktop computer but are out of place in my mobile devices. I used chrome's mobile simulator and it works fine there too. But not in the real mobile device.
Please help :(
There are many possibilities...
Without a look at your code, or knowing the OS for the device used it is impossible to provide a precise answer.
However, I experience similar issue with Foundation right out of the box... not sure why as well. In my application my up-loader re sizes each image and stores them in small, medium, and large folders. As a result, I need precise control on which image to load depending on device.
I came up with the system below which allows for the application of CSS to be applied according to device: This may or may not resolve you issue.
Mobile Detect
I went here to get Mobile Detect which I identifies the device used.
Code to call Mobile Detect
This calls the detect script and assigns device size to the variable: $thisImg
# mobile detect
require_once ($level.'core/ini/mobile-detect.php');
$detect = new Mobile_Detect; $deviceType = ($detect->isMobile() ? ($detect->isTablet() ? 'tablet' : 'phone') : 'computer');
if($layoutType == 'mobile'){$thisImg = 'small';}
elseif($layoutType == 'tablet'){$thisImg = 'medium';}
elseif($layoutType == 'classic'){$thisImg = 'large';}
Store Device Size
To store the device size I use a hidden input with an id of img_sizer
echo '<input type="hidden" id="img_sizer" value="'.$this_img.'">';
jQuery
By assigning a class to the image you can now control the CSS on all the images with that assigned class according to device and can manage various image classes through jQuery.
$('img.respond').each(function(){
var which_size = $('#img_sizer').val(); // my hidden input
if(which_size == 'small'){$(this).addClass( "text-center" );} // add center class for small
})
Determining Folder Path
In my application I use the following jQuery to assign the proper folder path to the image source. The code came from Stack here
$('img.respond').each(function(){
var which_size = $('#img_sizer').val(); // my hidden input
var msrc=$(this).attr('src');
msrc=msrc.split('/'); //images, services, image.jpg
var lastelem = msrc.pop(); //images, services // lastelem: image.jpg
msrc.push(which_size); //images, services, large // lastelem: image.jpg
msrc.push(lastelem); //images, services, large, image.jpg
msrc=msrc.join('/'); //"images/services/large/image.jpg"
$(this).attr('src', msrc);
if(which_size == 'small'){$(this).addClass( "text-center" );} // add center class for small
})
I was under the impression that 'backgroundIamge' is supposed to be supported in .setStyleAttribute to allow the user to set a background image in a panel via something like this:
setStyleAttribute("backgroundImage","url('myImageUrl')");
However, when I try the following:
var panel = app.createVerticalPanel().setId('panel')
.setStyleAttribute('text-align', 'center')
.setStyleAttribute('zIndex', '3')
.setStyleAttribute('position', 'fixed')
.setStyleAttribute('left', 10)
.setStyleAttribute('top', 10)
.setWidth(250)
.setHeight(150)
.setStyleAttribute('backgroundImage',"url('https://myImage.png')");
I cannot produce a background image in the panel. The funny thing is the exact same code will produce a background image in a button. I have tried 'background' and 'background-image' as well to no avail. Is 'backgroundImage' NOT supported for panels or am I missing something?
I figured it out...you need to use createAbsolutePanel or add an empty label to other types of panels.
I have a ruby on rails web app, and in some views i have many heavy images( <img> ) to render .The <img> are generated in a Helper.
The problem is that the css is loaded first, then the js, then the heavy images , and then finally the css refereneced background images.
It takes quite a while for all of the heavy images to load, which therefore holds the whole site up.
I want to load first the css background images then load the other images, as they obviously hold visual structure of the page.
rails version: 2.3.8
EDIT:
Thank you guys, I apologize for not having shared the code earlier.
I have two models : Categories and Images, each Category has many images.
In the view i have a list of categories, which is generated by a helper :
categories.each do |cat|
html << "<a href='##{cat.id}' class='mapcat' >#{cat.libelle}</a>"
end
and when I click on the category the images are displayed
categories_images.each do |i|
html << "<div id='#{i.id}' class='#{css}'><img src='/images_moi/categories/#{cat.libelle}/#{i.path_file_name}' />"
end
I have css background image associated to the list of category
The problem is that the images (<img>) is displayed before the css background images of the list of categories.
We need to assume things because you haven't shared your code.
Coming to your query, for now you can preload images using jQuery:
function preload(arrayOfImages) {
$(arrayOfImages).each(function(){
$('<img/>')[0].src = this;
// Alternatively you could use:
// (new Image()).src = this;
});
}
// Usage:
preload([
'img/imageName.jpg',
'img/anotherOne.jpg',
'img/blahblahblah.jpg'
]);
This saves the loading time of loading images.
Use a base64 string.
Example:
background-image: url(data:image/png;base64,*CONVERTED IMAGE DATA HERE*);
without: **
online converter: http://webcodertools.com/imagetobase64converter
note: I only would suggest this if the image size is not too heavy.
Solution: Do not use the img tag.
Create a sprite containing all your images. Load the sprite in your application.html layout once.
Use data uris to transmit the data directly in the html. See http://css-tricks.com/data-uris/
My approach is to lazy load the images using jquery and data- tags. This approach also allows me to choose different images based on device width and spare tablet/mobile users.
<img src="" data-src="/img/graphic-desktop.jpg" data-smallsrc="/img/graphic-smaller.jpg" alt="Graphics" class="lazy" />
<!-- the following would be in your js file -->
$lazy = $('img.lazy');
$(window).load(function(){
// window load will wait for all page elements to load, including css backgrounds
$lazy.each(function(){
// run thru each img.lazy on the page. spare the jquery calls by making $this a variable
$this = $(this);
// if the window is greater then 800px wide, use data-src, otherwise, use the smaller graphic
($(window).width() >= 800) ? $this.attr('src', $this.attr('data-src')) : $this.attr('src', $this.attr('data-smallsrc'));
});
});