I have a hero with multiple images, I want to display images according to screen sizes, for example, if the user is using a big screen, the hero will load the large/wide images, and if he uses a phone, the hero will display a different image that is not wide to fit the screen.
I do not know how to do this with nextjs, there is no way to specify which image to load on a different screen.
I did solve the problem using nextjs's useMediaQuery
{ const mobile = useMediaQuery(theme.breakpoints.down('sm')); }, but the results aren't perfect, because if you use mobile ? [....] : [....] you cannot add 'priority' to the image components, if you try to add it, it will load both images first, then execute the conditional statement to hide one. so you have to sacrifice that.
It seems like Image doesn't support that use case. I found this and it works as expected. https://github.com/vercel/next.js/discussions/32196#discussioncomment-1761938
I have developed an LWUIT app. I have two types of images dispayed in the app. One coming from server side that need to displayed (like a photo posted and saved to server side) and one packaged in my jar and displayed mainly as icons (like a music icon, loading animation gif etc). I need to display all images according to the sreen size and resolution. The first kind is displayed by taking the screen display height and width and then use scale method and show a scaled version of the image. But however I have no idea how to show the second kind. i.e. icons. Example, my loading image looks good in most of the phones but for some phones like samsung, it looks blurred and over-sized. How to do this. My basic idea is to keep 3 types of images of icons like icon_width_lowXheight_low.png, icon_width_mediumXheight_medium.png and image_width_highXheight_high.png and show it based on the screen size. Please let me know the bets way to achieve this?
Thanks,
Parvathy
You should use MultiImages which were added in LWUIT 1.5. I don't have a link for this in LWUIT but our work in Codename One is pretty close to this so check out the How Do I? on multi images (and I suggest migration to Codename One regardless).
I think that you will need to use this
Image i = Image.createImage("your image path here");
i = i.scaled(widthValue, heightValue);
And put this values in relation to the Display.getInstance().getDisplayHeight() and Display.getInstance().getDisplayWidth()
Right?
I am trying to create an interactive map where users can click on different provinces in the map to get info specific to that province.
Example:
archived: http://www.todospelaeducacao.org.br/
archived: http://code.google.com/p/svg2imap/
So far I've only found solutions that have limited functionality. I've only really searched for this using an SVG file, but I would be open to other file types if it is possible.
If anyone knows of a fully functioning way to do this (jQuery plug-in, PHP script, vector images) or a tutorial on how to do it manually please do share.
jQuery plugin for decorating image maps (highlights, select areas, tooltips):
http://www.outsharked.com/imagemapster/
Disclosure: I wrote it.
Sounds like you want a simple imagemap, I'd recommend to not make it more complex than it needs to be. Here's an article on how to improve imagemaps with svg. It's very easy to do clickable regions in svg itself, just add some <a> elements around the shapes you want to have clickable.
A couple of options if you need something more advanced:
http://jqvmap.com/
http://jvectormap.com/
http://polymaps.org/
I think it's better to divide my answer to 2 parts:
A-Create everything from scratch (using SVG, JavaScript, and HTML5):
Create a new HTML5 page
Create a new SVG file, each clickable area (province) should be a separate SVG Polygon in your SVG file,
(I'm using Adobe Illustrator for creating SVG files but you can find many alternative software products too, for example Inkscape)
Add mouseover and click events to your polygons one by one
<polygon points="200,10 250,190 160,210" style="fill:lime;stroke:purple;stroke-width:1"
onmouseover="mouseOverHandler(evt)"
onclick="clickHandler(evt)" />
Add a handler for each event in your JavaScript code and add your desired code to the handler
function mouseOverHandler(evt) {};
function clickHandler(evt) {};
Add the SVG file to your HTML page (I prefer inline SVG but you can use linked SVG file too)
Upload the files to your server
B-Use a software like FLDraw Interactive Image Creator (only if you have a map image and want to make it interactive):
Create an empty project and choose your map image as your base image when creating the new project
Add a Polygon element (from the Shape menu) for each province
For each polygon double click it to open the Properties window where you can choose an event type for mouse-over and click,
also change the shape opacity to 0 to make it invisible
Save your project and Publish it to HTML5, FLDraw will create a new folder that contains all of the required files for your project that you can upload to your server.
Option (A) is very good if you are programmer or you have someone to create the required code and SVG file for you,
Option (B) is good if you don't want to hire someone or spend your own time for creating everything from scratch
You have some other options too, for example using HTML5 Canvas instead of SVG, but it's not very easy to create a Zoomable map using HTML5 Canvas,
maybe there are some other ways too that I'm not aware of.
Just in case anyone will search for it - I used it on several sites, always the customization and RD possibilities were a perfect fit for what I needed. Simple and it is free to use:
Clickable CSS Maps
One note for more scripts on a site: I had some annoying problems with getting to work a map (that worked as a graphic menu) in Drupal 7. There where many other script used, and after handling them, I got stuck with the map - it still didn't work, although the jquery.cssmap.js, CSS (both local) and the script in the where in the right place. Firebug showed me an error and I suddenly eureka - a simple oversight, I left the script code as it was in the example and there was a conflict. Just change the front function "$" to "jQuery" (or other handler) and it works perfect. :]
Here's what I ment (of course you can put it before instead of the ):
<script type="text/javascript">
jQuery(function($){
$('#map-country').cssMap({'size' : 810});
});
</script>
Go to SVG to Script
with your SVG the default output is the map in SVG
Code which adds events is also added but is easily identified and can be altered as required.
I have been using makeaclickablemap for my province maps for some time now and it turned out to be a really good fit.
I had the same requirements and finally this Map converter worked for me. It is the best plugin for any map generation.
Here is another image map plugin I wrote to enhance image maps: https://github.com/gestixi/pictarea
It makes it easy to highlight all the area and let you specify different styles depending on the state of the zone: normal, hover, active, disable.
You can also specify how many zones can be selected at the same time.
The following code may help you:
$("#svgEuropa [id='stallwanger.it.dev_shape_DEU']").on("click",function(){
alert($(this).attr("id"));
});
Source
You have quite a few options for this:
1 - If you can find an SVG file for the map you want, you can use something like RaphaelJS or SnapSVG to add click listeners for your states/regions, this solution is the most customizable...
2 - You can use dedicated tools such as clickablemapbuilder (free) or makeaclickablemap (i think free also).
[disclaimer] Im the author of clickablemapbuilder.com :)
<script type="text/javascript">
jQuery(function($){
$('#map-country').cssMap({'size' : 810});
});
</script>
strong text
I used Apple's AVEdit-Demo, tweaked it a little and was able to add CALayers with animations and images to the video-composition. So far, this works fine.
It uses AVVideoComposition and AVPlayer/AVPlayerItem to merge videos (and show them - the export rendering is a little different).
I added a layer with a png with some transparent areas, sort of like a mask, that hides parts of the video. Now I need to move the video-layer, so I can adjust the hidden parts (a.k.a. the visible part). The Mask covers the whole screen (in a CALayer), so moving the Mask-Layer isn't an option.
I didn't find any properties or methods, to adjust the position of the video-layer...
Any Ideas?
Found it...
I had to access the AVMutableCompositionTrack in the AVMutableVideoComposition and set the preferredTransform there (CGAffineTransformTranslate).
However - the Docs state, that this should be possible in a AVMutableComposition as well (AVAssetTrack setPreferredTransform).
I couldn't get this to work, though.
I want to have huge background images on my site but without giving the user a hard time downloading them and the site looking ugly as the background loads.
They would be no bigger than 1920 X 1080 in size, however it's hard to say in terms of kilobytes/megabytes.
What are my options here and which are most effective?
I'm not too bothered about bandwidth, just want to user to think everything looks nice ;)
One option is to use multiple backgrounds. Have small background as bottom layer and cover it with larger background.
It might be tricky to have two backgrounds if you want it on body and want to support IE. Solution might be to start smaller body background use JS to change low-res background to high-res once it loads:
var i = new Image();
i.onload = function(){document.body.style.backgroundImage = 'url(' + i.src + ')';}
i.src = 'gigantic.jpg';
Keep in mind that such large background needs more RAM than some mobile browsers have (iPhones pre-3GS will either refuse to decode such image at all or will start purging cache/tab content in panic).
The latter problem can be worked around with CSS Media Queries:
http://lofotenmoose.info/css/destroy/media-queries-background-stretch/
Except query max-device-width instead of (virtual/zoomed) max-width.