I am not sure it is that unusual a situation either, except I cannot think of a real life example with buttons on top of buttons. @patrickhlauke The biggest drawback to that circle solution is that it incentives smaller target. ), target offset: the distance measured from the farthest point of a target to the nearest point of the second target. Target spacing (minimum): multiple overlapping elements interact oddly with offset. The third example has a large box with two smaller nested boxes. In the current SC, a button that's 6px wide needs 18px space to the next target. it is unclear whether target offset refers to a point within the object or to a boundary point. This is another example where the more it is defined to catch all possible cases, the less understandable it becomes (or it has to be more prescriptive). The above Javascript will query all the Divs and add event listner (click) to each of them. If interested I also have the SVG code for this image: Partially using http://code.google.com/p/svg-edit/, partially editing directly the source :). Laymen's description of "modals" to clients, Short satire about a comically upscaled spaceship, Balancing needed bending strength of a wood railing post in concrete with the lifespan due to rot. What was this mini-computer tape troubleshooting process. With the circle solution that first case, it's 12px space for a 6px button (the other two are the same), if the circle with diameter of 24px is not fully contained inside the target (i.e. So the offset to both adjacent targets is 30.6px. I.e. @alastc In your comment the pink solid line stands for the failing distance - but this line fails because of common sense and not because of the definition of target offset. I don't think anyone commented on my suggestion to tighten up the target-offset definition to exclude other targets? Lets say that the first segment is from x1 to x2 (x1<=x2) and the second one is from z1 to z2 (z1v2 then the segments do not overlap. If you have a nested target, then the offset for the nested target is actually less than the size of the target, that exception doesn't help you pass. The Time Complexity of the above code is O(1) as the code doesnt have any loop or recursion. However, there are many maps that cannot be enlarged, e.g. 
In the current SC, a button that's 6px wide needs 18px space to the next target. We then need to explicitly define where to draw that line. I can live with the fact that the SC has various loopholes - the intention is clear and most targets on the web are rectangular and thus easy to test. It is also extended in, The Hamming Distance is the number of different symbols between two strings/numbers (equal length). With the circle solution that first case, it's 12px space for a 6px button (the other two are the same). (alt = original H4 with two longer red lines going from the outer edge of the outer target, to the outside of each inner target, but overlapping the second inner target.). If the rectangle wasn't sticking out above and below the squares, this would be a little easier. @JAWS-test This is a for-each situtation, i.e. It refers to the nearest/furthest point, so would be on the boundary. l1: Top Left coordinate of first rectangle. How can a shape be included in a distance? Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. This applies to the upper object, but also to the underlying object: an area of at least 24 x 24 px must also be uncovered. According to Figure 5 in Understanding, yes. All Rights Reserved. That's a good case to have an example of. Thus, Wilco has actually found a loophole of the criterion. Please give us a 464). 
12px space if the button is 12px, and 6px if the button is 18px. How can I transition height: 0; to height: auto; using CSS? the only other way out, if using the idea of circles, would then possibly be to add further clauses if the circle with diameter of 24px is not fully contained inside the target (i.e. @JAWS-test We've worked on overlap in the past. But the rectangles start to overlap at a certain browser window width. To express it in plain English, we calculate the maximum of the lower coordinates and the minimum of the upper one. @JAWS-test We all agree the pink link fails (the SC's first line), but with the wording of target offset, I think the green lines pass the outer target due to the spacing bullet. The squares have a 24x24 diameter and so pass. Reason: For overlapping objects, target offsite does not work. Otherwise, by the letter of the definition you could measure from the right-side of the outer target (A) to the nearest point of the left target (B), through another nested target (C). The biggest drawback to that circle solution is that it incentives smaller target. the exception does not apply to them, so they must be 24 x 24 px in any case. An element with a larger z-index overlaps an element with a lower one. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Green fuzzy lines for 24px or over, pink solid line for failing distance. The odd thing here is if those two squares were treated as a single target, the SC would fail. This is where the problem starts, that it is unclear whether target offset refers to a point within the object or to a boundary point. Offset includes the target and spacing around the target.". This would not be a good idea because then in my figure the two blue 2 x 2 px squares in a line would violate the SC, the same squares arranged diagonally (and in yellow) would fulfil the SC, although they would be closer together and thus more difficult to operate. Working through these examples, it doesn't look like overlap with a 3rd target is considered. Switching to a circle method isn't a small tweak. The target offset is relevant in the example of Wilco, Those who argued against Wilco measured the target offset wrong. each target needs to be able to contain a circle with a diameter of 24px. are you selectively choosing the furthest square away from each corner of the rectangle? Is "Occupation Japan" idiomatic? Problems based on Rectangle, Square and Circle, Problems based on Polygon and Convex Hull, Maximum rods to put horizontally such that no two rods overlap on X coordinate, Maximum number of operations required such that no pairs from a Matrix overlap, Minimum time at which at least K out of N circles expanding 1 unit per second overlap, Find side of Square which makes minimal area to fit two identical rectangles inside it, Minimum area of square holding two identical rectangles, Intersecting rectangle when bottom-left and top-right corners of two rectangles are given, C++ Program to Find all rectangles filled with 0, Python Program to Find all rectangles filled with 0, Find the number of corner rectangles that can be formed from given Matrix, Find vertex coordinates of all possible rectangles with a given vertex and dimensions, Find the minimum number of rectangles left after inserting one into another, Find number of rectangles that can be formed from a given set of coordinates, Find the number of rectangles of size 2*1 which can be placed inside a rectangle of size n*m, Sum of Areas of Rectangles possible for an array, Number of rectangles in a circle of radius R, Smallest square formed with given rectangles, Count the number of rectangles such that ratio of sides lies in the range [a,b], Check if N rectangles of equal area can be formed from (4 * N) integers, Count of rectangles possible from N and M straight lines parallel to X and Y axis respectively, Total number of unit cells covered by all given Rectangles, Count of Rectangles with area K made up of only 1s from given Binary Arrays, Complete Interview Preparation- Self Paced Course. 
Also, in testing the inner targets, it would end as soon as it hit the outer target, i.e. The thing is that you can create this exact same scenario without overlapping. I was also a proponent of the idea of the circles of exclusion, centered on the targets, fairly early on. You can now choose to sort by Trending, which boosts votes that have happened recently, helping to surface more up-to-date answers. Stack Overflow, Size of smallest square that contains N non overlapping rectangles, Incorporating uncertainty in learning to defer algorithms for safe, The Overlapping Rectangles Using Css And Javascript Algorithms, c# are two rectangle overlapping Code Example, Scalable and Modular Architecture for CSS: An SMACSS Intro Toptal, How to Approach SVG Animations: A CSS Tutorial Toptal, Creating Generative Patterns with The CSS Paint API CSS Tricks, Split BiRNN for real time activity recognition using radar and, How Many Squares/Rectangles Does a Rubik Cube Have? @WilcoFiers - If it is explicitly vertical and horizontal, that doesn't allow for diagonals. Didn't quite work out. @patrickhlauke I understand every adjacent target to be anywhere on the target so I think @WilcoFiers may have flagged an important defect here. (LogOut/ I don't think this solution would work. Regardless, I presume you mean diagonal or side, but I do not know which! Hmm, I guess we'd have to apply that to the offset bullet as well. But let's come to the third figure (you don't write anything about this, but this is the crucial example): This should only apply to the lower, hidden element, not the upper element. Your elements are going to overlap if you give them absolute widths and heights. I'm not sure I like that. Why I measured the target offset despite the area of 24 x 24px, had the following reason: Wouldn't it be easier to say (for non-overlapping targets): the distance measured from the farthest point of a target to the nearest point of the second target. The Three rectangles can be represented using HTML Div containers/elements. A-143, 9th Floor, Sovereign Corporate Tower, We use cookies to ensure you have the best browsing experience on our website. one on top of the other by using the CSS z-index property. This is great how would I add a set space between each of them? Bruteforce Algorithm to Find the Next Closet Time Reusing the Current Digits, Preloading Images using Javascript, CSS or Pure HTML. r1: Bottom Right coordinate of first rectangle. We're computing the distance between two points. it should also work when targets have odd shapes (e.g. Connect with us on Facebook and Twitter for the latest updates. For the small circle, the farthest point away from the larger circle is right in the center. ), note that in my addendum i explicitly talk about "distance", not this concept of "offset" that munged both the diameter itself and the spacing together. My concern is that if you ignore the second nested target, then "A to B" passes. So the offset is the radius of the small circle. I also don't understand why that would pass, offset is defined as "the distance measured from the farthest point of a target to the nearest point of the second target". more than 24 px): same measuring method. For other shapes like stars and such you may need to have measurements do not use horizontal or vertical lines. Why is a "Correction" Required in Multiple Hypothesis Testing? That wouldn't exactly help this case since that second square doesn't intersect. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. Asking for help, clarification, or responding to other answers. Copyright 2022 Tutorial Republic. We need to write a function bool doOverlap(l1, r1, l2, r2) that returns true if the two given rectangles overlap. Is it patent infringement to produce patented goods but take no compensation? I would suggest changing all of your widths to max-width and give all of your elements a percentage. Exceptions apply for the following cases: Perhaps 25px would be better, as that actually has a central pixel. For example, in the, Notice: It seems you have Javascript disabled in your Browser. downside, of course, is that it more clearly reveals that "1x1 CSS px targets can be valid as long as there's enough spacing around them" fudge that we tried hard to hush up/make non-obvious. Well occasionally send you account related emails. The problem can be reduced (from two dimensions to one dimension) to find the overlapping section of two segments on the same line. you could ignore the 3rd one and treat that as spacing. I sought advice from a mathematician: For complex objects, determining target offset is not trivial. Following is a simpler approach. it could also come about again with overlapping or complex shapes. Announcing the Stacks Editor Beta release! The question is: if there were only the left inner square: would that be valid. one potential weirdness/gap i can see though is that as originally worded, there's is not really a good provision for targets that are contained inside each other but offset - even looking at examples H1/H2 you have to decide to measure from the right edge of the rectangle to the right edge of the single square to say it passes, because if you looked at the left edge of the rectange to the left edge of the square it would fail basically you're trying to determine if there's at least some area of at least 24x24 pixels on the big rectangle that's clear/unobstructed by the square. You signed in with another tab or window. I come up to another geometry problem while coding. Sign in Better would be: If two objects overlap completely, the target size of both objects must be at least 24x24 px, sorry @JAWS-test but i think you've got the wrong end of the stick herenothing to do with the inner targets being 24x24 or greater, this is about determining if the outer target passes the SC, @wilco, it might help if you drew some diagrams/lines here to clarify what you're actually looking at in terms of diagonals, and what makes you say the current wording allows for this to pass (for the outer control). We can define each Divs onclick event but that is not an elegant solution as there will be duplicate code and you have to manually associate the behavior for each rectangle by ID explicitly. What scale do I have to use so that the city boundaries of neighboring cities have enough distance from each other. For each target, it must be possible to draw a circle that: I think this would, in essence, apply to all the general cases, as well as the edge cases of overlapping or completely wrapped/surrounded/nested targets alike. Solution: Actually quite simple. If we keep with target offset, I suggest to adjust the first exception as follows: Spacing between non-overlapping targets: The target offset is at least 24 CSS pixels to every adjacent target. 12px space if the button is 12px, and 6px if the button is 18px. Trending is based off of the highest score sort and falls back to it if no posts are trending. And: the midpoint is mathematically precisely defined (in contrast to the concept of target offset): https://en.wikipedia.org/wiki/Centroid, I think your circle definition doesn't work because of the 2nd point: that allows two targets each 1x1 px, right next to each other. This property specifies the stack level of a box whose position value is one of absolute, fixed, or relative. To clarify this, I have created the 3 figures to show how it must be measured correctly (namely always in the same way and not suddenly differently), Draw a circle of 24 px around the midpoint, There must be no other target in this circle, The outer target must also have a contiguous clickable area of at least 24x24 px. In particular scenario H4 from my codepen: https://codepen.io/wilcofiers/pen/abZxPow?editors=1100. The size of the target for pointer inputs is at least 24 by 24 CSS pixels (no), except where the distance measured from the farthest point of a target to the nearest point of the second target is at least 24 CSS pixels to every adjacent target; For the outer target, these are the two things I'd look at for the inner images: In order to submit a comment to this post, please write this code along with your comment: 1d30fedcad7467e7ae5f1f5f504e78ca, The Overlapping Rectangles using CSS and Javascript, // avoid fired more than once for overlapping area. the fact that we're still, months later, finding the approach to be hard to understand, and bringing up weird edge cases (and we've not even looked at non-rectangular target areas in depth, which will become more common as clipping paths and interactive SVGs are being taken up) doesn't fill me with confidence on the "go" stage to be honest and to be clear, my fear is that any "ah well, it's good enough for the most part, we'll handwave the gaps/edge cases" now will only come back to bite us later on when more of those bubble up when this SC crashes against varied real-world content, and then it's too late to address other than spackling on more exceptions/clarifications/handwaves. @alastc: You have not connected the farthest point, but the two nearest points. Scientifically plausible way to sink a landmass. Following is the example which shows how to create layers in CSS. doesn't have to be at the centroid (thinking of irregular-shapes controls - which is in fact what we get with overlapping/nested targets as well). The offset between the rect and the left is measured like this: The same is true for the right square, except its closest edge is the left edge. @JAWS-test Maps that can resize are one of those exceptions where the target size is essential. In working on automated tests, I ran into something I hadn't realised before. Unfortunately, I am not a mathematician to say whether this definition makes any sense at all with respect to irregularly shaped objects. @patrickhlauke I think your circle definition doesn't work because of the 2nd point: that allows two targets each 1x1 px, right next to each other. Distance in each case 24 px + x = passed, 2nd figure: 2 inner rectangles (24x24 px) and one outer rectangle (clearly larger and sufficient distance between both inner ones, i.e. Change), You are commenting using your Twitter account. If two or more touch targets are overlapping, the overlapping area should not be included in the measurement of the target size, except when the overlapping targets perform the same action or open the same page. What it looks like with maximized browser, What I wand to avoid when the browser gets too small. Didn't go well. https://www.coronavirus.sachsen.de/infektionsfaelle-in-sachsen-4151.html, white arrow: farthest point of inner target to nearest point of outer target, black arrow: farthest point of outer target to nearest point of inner target, 1st figure: Inner rectangle (24x24 px) and outer rectangle (much larger): I measure farthest point to nearest point, once from inner to outer (left arrow), once from outer to inner (right arrow). Clicking on any rectangle should display (using alert is fine) the name of the rectangle. if it doesn't, then: Maps that can resize are one of those exceptions where the target size is essential, I am aware of that. Finally, we can use Javascript to define the clicking behaivor. If the results maintain the same relationship, then there is no overlap. I.e. So my goal here is to create 5 rectangles next to each other that are centered left, right, up, and down no matter how you re-size the browser. or share your feedback to help us improve. to your account. I see it that way too. We went down that road before. I.e. the furthest point of the outer target, to the closest point of the inner target. This is the code I have so far and it almost works. With the definition of target (~ the area available for pointer input), there is no such thing as an overlapping target. How to avoid paradoxes about time-ordering operation? In terms of checking if the rectangle itself passes/fails (you'll still need to run considerations for the square(s) separately of course), 1st figure: Inner rectangle (24x24 px) and outer rectangle (much larger), you don't need to run any spacing measuring to check if the outer rectangle has sufficient distance because the rectangle itself, even once you ignore/take out the inner square, has an area that's >= 24x24, 2nd figure: 2 inner rectangles (24x24 px) and one outer rectangle (clearly larger and sufficient distance between both inner ones, i.e. If you take the outer one and test to each inner one, your white arrow is not valid because it starts in the inner one. By extension to rectangles specified by (top,left) and (bottom,right) corners, the overlapping region of two rectangles: will be (v1=max(x1, z1), w1=max(y1,t1))(v2=min(x2, z2), w2=min(y2,t2)). If offset can't be a diagonal, then targets that are positioned diagonally don't have an offset anymore. 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If it doesn't have to be a boundary point, I could also assume that target offset is always 0 for overlapping objects, since there is a point of the lower object under each point of the upper object. It combines the spacing / size thing into one requirement again. The rectangle is only visible as a 6 pixel wide perimeter around the two squares. could the SC catch reasonably large targets that we think should pass, but fails those examples. There's a point you're aiming for that's on the target, and then a click anywhere within 12 pixels of that point should not activate the wrong target. How Many Squares/Rectangles Does a Rubik Cube Have? So mainly we are given following four coordinates. Successfully merging a pull request may close this issue. Already on GitHub? Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. When an element is overlapped by multiple other elements, it is possible to pass the SC with a very small target on the outer element. There is insufficient area showing in the large box, but if you measure between the large box and one of the smaller ones, ignoring the other, then it could pass despite not having 24px of sizxe+spacing.). Having been through 2 wide reviews, we're at the go/no-go stage barring small tweaks. Writing code in comment? Therefor the SC meets the spacing exception. (LogOut/ Get access to ad-free content, doubt assistance and more! Want to see how the above combines and works together in the JS playground? Have Donetsk and Luhansk recognized each other as independent states? Change), You are commenting using your Facebook account. Area of a polygon with given n ordered vertices, Convex Hull | Set 1 (Jarviss Algorithm or Wrapping), Dynamic Convex hull | Adding Points to an Existing Convex Hull, Minimum area of a Polygon with three points given, Find Simple Closed Path for a given set of points, Closest Pair of Points using Divide and Conquer algorithm, Optimum location of point to minimize total distance, Finding the vertex, focus and directrix of a parabola, Find mirror image of a point in 2-D plane, see if the point lies inside the other rectangle or not. rev2022.7.20.42632. Take 3x3 rubik cube for example, each side, Javascript is the most popular programming language used on internet. I have no suggestion on how to fix this, without causing a good deal of other problems that might get overlooked. @WilcoFiers From the text, why do you assume you avoid the 3rd target? consider target A, and take furthest point of A (to B), and the nearest point of B to A. not quite sure i follow. Coming back to the idea of circles one more time (since they've been resurfaced here, and it's been bouncing around my mind since) leaving aside that they potentially make the common case more difficult to grok (though not by much, seeing our general to-ing and fro-ing to understand the language in the SC here as it currently is), would this capture the essence of what we want? you test each target compared to its adjacent targets. The large circle passes, but the smallest one fails. 
In Wilco's figure, it applies that the target offset between all objects is greater than 24 because the objects are greater than 24. There were objections back then because that approach then failed certain cases.
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Projekt i realizacja: fusuma vs libinput-gestures
