Does anyone know how to use the TYPO3 focus area in the frontend?
TCA imageManipulation
If I use the crop attribute in the fluid-template
<f:image width="555c" height="312c" src="{article.teaserFile.uid}" treatIdAsReference="1" crop="{article.teaserFile.originalResource.referenceProperties.crop}" />
i get a serialized string in data-focus-area.
<img data-focus-area="{"x":786.1145320197,"y":96.682142857143,"width":271.44177339901,"height":270.05062857143}" src="/fileadmin/_processed_/9/b/csm_testimage_0bfc7bc724.jpg" width="657" height="566" alt="" title="Testimage">
Does the data need to be used by a JS library? Can someone recommend a library here? Because i didn't find a recommendation for a library which can handle focus Area and the attribute data-focus-area.
Or do i have to write a viewhelper giving the attributes e.g. for "jQuery focuspoint" to data-focus-x, data-focus-y, data-image-w, and data-image-h.
No, you don't need to rewrite the ViewHelpers. (It would be nice, if in the future it could be a bit better extendable then now however.)
But you can implement the jQuery Focuspoint. The only thing you need to do, BEFORE you starts the focuspoint plugin, you can transform this array into the needed values with jquery.
An exmaple from the FocusPoint documentation
$('.focuspoint').focusPoint();
So before this line, you can just simply add the values from the array as an own data attribute.
The form is different, but the logic is the same. So you have the x, y, width and height values in the focus-area array.
This would not work with responsify.js for example. It needs bottom, top, left, right values.
So yes... it won't work out of the box.
But NO, you don't need to change the PHP part, because you can solve it on the front end. (You need jQuery plugin anyway, so making some code before using it is easier.)
Changing those ViewHelpers is also a possibility of course, but you really need to rewrite their functionality (also the renderImage function to be concrete) and if you want to update it to a later version it could lead to problems.
Related
How do I change the size and position of buttons or other UI elements in a GUI created with the threepenny-gui package?
The documentation of Graphics.UI.Threepenny.Attributes lists some functions which are probably useful, such as coords :: WriteAttr Element String. However, I don't understand how to use them. Specifically, I don't understand what the String argument is supposed to be.
Thanks
I think my misunderstanding that I had was that my problem was not actually related to threepenny-gui but is instead a question about HTML. This link helped my find the answer I was looking for: https://www.geeksforgeeks.org/html-attributes/
Just in case anyone else is struggling with this as well, this line (mostly) solves it:
# set UI.style [("text-align", "center"),("color","red"),("font-size","30px")]
(The UI in UI.style comes from: import qualified Graphics.UI.Threepenny as UI)
Threepenny UI element combinators translate more or less directly to HTML, and so you should think in terms of HTML when doing layout with it:
The attributes from Graphics.UI.Threepenny.Attributes you mention are HTML attributes. Modifying them while defining your initial layout is typically done with set. (By the way, if you need a reference for looking up what things like HTML attributes do, you can't do wrong with MDN.)
For CSS styling, you can use the (#.) combinator.
As for layout, the basic tools are (#+) to nest HTML elements, and grid, row and column to arrange div-based grids.
I'm using React.js to build an app, which includes quite a few svg charts. I'm using d3 functions that help in chart creation, such as scales, but then using React to generate the svg elements. Here's a great writeup on the approach: http://10consulting.com/2014/02/19/d3-plus-reactjs-for-charting/
Part of why I'm going down this road was for performance - the first version of the app was too slow. It has a lot of elements and a lot of user-interactivity, all client-side. I'm trying to basically recreate the dc.js library in React.
It's a really fun approach and intuitive (more so than d3 alone IMO). Building axes is tedious though, and d3 does it so nicely. I would love d3 to just be able to output a string of svg elements that represent the axis (and maybe other elements) , and I feed it to React to include in the DOM.
I did see this SO question (How to make d3.js generate an svg without drawing it?) and the answer was to append it in the DOM and remove it, or create a DOM fragment. Those approaches go against the React approach and likely negate the performance benefits of React. I also saw jsdom and phantomjs solutions, which will not work in my case.
Can d3 generate svg without appending it to the DOM?
#Lars is correct if you are using traditional means. However, this is definitely possible with 'jsdom'. This library can simulate the DOM and also allows for string input. Which means you could inject the root element into the fake DOM and get a new window element to manipulate. You could then use D3 without changing it's source and using is like normal.
This would allow for the generation of an SVG.
No. D3 by design operates directly on the DOM through its selections. To have it generate string representations instead without modifying the DOM, you would need to modify its source code (and it would be quite a significant modification).
I'm trying to create some scripts which require moving through a lot of on-the-fly HTML with random IDs. They require getting the parents of an element - but I'm not sure how to implement this in WebdriverJS.
If I access the element I want via a console, I can do the following to get it;
document.querySelector('span[email="noreply#example.com"]').parentNode.parentNode
Is there a way to do this in WDJS? I've looked and can't see anything obvious - it's specifically the parent stuff I'm having issue with. I saw that a possible solution may be xPath however I'm unsure of syntax having never used it before.
Thanks in advance!
I don't know the syntax of WebDriverJS. But the XPath is as below, you need a way to fit it in somewhere.
This is based on your CSS Selector, so please show HTML if needed.
.//span[#email='noreply#example.com']/../..
For example, if you have HTML like this
<div>
<div>
<span email="noreply#example.com">Contact me</span>
</div>
</div>
You can avoid using .. to go up.
.//div[./div/span[#email='noreply#example.com']]
If you have more levels to look up, another handy method would be using ancestor from XPath Axes.
Also, as #sircapsalot brought up, CSS selectors spec doesn't support parent selecting, so XPath is the only way to go, unless you inject JS.
I have a page I'd like to embed a news-feed widget into (so that the feed from some remote site will be displayed in my site).
While there are quite a few free news-feed widgets available out there (a partial list is here: http://allwebco-templates.com/support/S_script_newsfeed.htm), They all require insertion of complex code into the html page, while all the parameters are hard-coded into the generated code, which looks something like this:
insertedWidgetText = "<script id=\"scrnewsblock10795953\" type=\"text/javascript\">...script specific parameters go here...</script>"
let feedWidget = toWidgetBody [hamlet|#{preEscapedText insertedWidgetText}|]
This doesn't integrate well with Yesod's approach as it requires specifying to Hamlet that the content is preEscapedText, which in turn disables the ability to use Hamlet's processing to alter parameters of the widget dynamically (So in case I want the widget to use a different source, for example, I need to statically change the quoted text and cannot use Hamlet's variable substitution).
Of course I could do some text manipulation myself, tailor built for the widget I'm using, but that doesn't seem like the "right" solution (especially if I want to have the embedded text in some external file and not in the middle of my code as in the example above).
Can the above mentioned issue have a better solution than the one I thought about?
Is there an implementation of a news-feed widget in Haskell/Yesod that I can use as a plugin?
Note: I'm a very poor javascript programmer, but solutions in that direction are also welcomed.
Thanks,
maybe my google-fu is just letting me down today, but i have not been able to find a way to resolve arbitrary properties of nodes in order to obtain a style attribute. For instance, I'd like to be able to ask a node 'What is your value (if any) for -fx-fill?'.
A simple application example: I'd like to build a custom legend for a chart. To do so, I'd have to ask a rendered node for their fill property. I could, of course, use my knowledge of the default-colorN classes and simply look up the fill, but it feels like this would be a very bad approach as is violates the whole idea of CSS.
Thanks in advance.
BTW: JavaFX version is 2.1
I'd like to be able to ask a node 'What is your value (if any) for -fx-fill?'
There is no public API for that yet. It is planned to add such an API in a future release.
See RT-17293 CSS Style Object Model in Java.
For the 2.0 and 2.1 release, you could probably find the information using undocumented, deprecated impl_ methods, but I wouldn't advise that.
For now, I'd advise just using css chart styling where-ever you can and supplementing it with a sprinkling of dynamic node.lookup() code where it is impossible to achieve the styling using css.