"A stackblitz is worth a thousand words": https://stackblitz.com/edit/angular-zoom-crop-marker
Basically what I'm trying to do is to have a square drawn above a certain position in an image (<img>), and have that dynamically adjust to the image while being zoomed in / out and cropped. The stackblitz link has 3 views, the basic view which is a plain image, a zoomable view (which I got working as well) and a view where the imaged is "zoomed in and cropped" while being zoomable - This is where I need your help.
Should I crop using object-fit in some way? Is it better if I use a canvas to handle this? I've been at this for a whole day I and I feel my css knowledge is too limited to pull this of.
Bonus question: How would I go about to have the zoom-in zoom-out buttons add/remove one image per row using only css flex-box? (ie: not statically adding x pixles in height and width, but rather increase or decrease the size of each image so that another image is removed or added (per row) while always filling up all the available space)
Thank you in advance!
Managed to solve it myself. stackblitz updated with a working solution.
Related
I use React + [Material UI Grid][1] to show my images, the images are in different sizes, and I want to:
Keep image ratio
Make image fit the parent container square(in other words, all images in a row with the same height)
The problem is that, The number of columns in Grid is variant, sometimes 3 columns(on mobile) and sometime 6 columns(on PC), React calcuate the width of image Dynamically. I don't know the run-time image width, so i can not set the image height in my css style excatly. any idea? thanks.
You can see the following effect currently, a very tall image makes the grid streched vertically, very ugly.
Use this code. It centres the image inside the Grid and doesn't let it overflow while also not giving the dim in pixels. Although the dimension is fixed to square(a x a) but can be changed.
I had the same issue in the past so I am sharing my own code.
Hope this will be useful as I have used CardMedia with component type img. You can select the relevant CSS if not complete from inspecting.
I am trying to create a specific solution for weeks now and I have tried many things but I am just not sure if it is possible at all to achieve. I need your opinions and point me in direction o a correct approach. Following what I am trying to create:
Initially there is a tile layout in which a certain number of cards (say 12) are placed in 4x3 grid:
Now, if user clicks on a tile (Box 3), the state changes to following:
Selected tile is expanded and other tiles get aligned one below another on the right side:
Challenge is that I want to create a transition from every tile's initial state to the state where every tile is aligned one below another on the right. At the same time, when a tile is clicked it is expanded in place.
Note - there are no sudden change in positions, no reload of page and preferably no JS (I wanted to write a CSS-only solution). Everything smoothly animates to new position. From the second screen if a different tile is selected (from right), then the expanded item will shrink and go in to the right hand stack while the selected item will expand and take place of the currently expanded (B3).
If you could just point me to correct direction it would be great help.
thanks.
You should check css flexbox.
Using the "order" proprety, you could asign order of every box from 2 to 8,
and each time a box is selected, you change it's order to 1 and you also change its size and colour.
However, I don't think you can use 'click' actions with css only.
I would recommend using JS for what you are trying to achieve.
Hope it helps
I know there are many techniques how to stretch the image to the whole page. I like the ones based on "background-size: cover", but if it is justified, I can use another technique. My problem is that I need to hook links to some parts of this background image with some hover effects - imagine a picture on castle in the background highlighting its different parts when you hover them with mouse.
Note:
I prefer imagemap solution, because it allows polygon shaped hotspots.
Note that I do not want components on top of the image having it's own dimensions.
I'm not exactly sure about the correct term of what I'm trying to do. But basically I am trying to set a video or flash.swf file inside a custom shaped border (the boarder isn't a perfect square) in the header of my website.
I've provided two pictures of what I mean. The first picture is what I want the page to look like when it first loads. The second picture is what it should look like after the video or flash.swf file loads.
Notice how in the second picture there is an image that fits inside what I am calling the boarder area. Again I do not know the proper term. Any help would be greatly appreciated as I don't even know where to begin to start.
Image 1 http://i.stack.imgur.com/xHhB6.jpg
Image 2 http://i.stack.imgur.com/gJ77g.jpg
Set the wmode="opaque" in the embed / object tag. Then you can overlay the flash file with a png that is transparent in the area you want the flash visible.
the png must be positioned absolute that you can position it right via top/left and for the z-index.
I'm programming a debate-graph with Raphael JS. Users can add nodes to the graph. Eventually the graph gets really big and the canvas is still the same size. the canvas (in raphael js: paper) is inside another div with "overflow: scroll;", so lets ignore screen real estate
Is there a way that I resize the canvas without reloading the page (to assign new X/Y values)?
Alternatively, can I create a second bigger canvas in parallel and copying all the elements over? is there a way?
If I understand your question, just call setSize() to expand the size of the canvas to the size needed as you need it. I've used this in a div with overflow:scroll to get the effect you describe.
In my case, I didn't want to resize, I wanted to zoom.
In other words, show the user the growing graph inside a constant-sized div.
So I needed: setViewBox()