From 3f6a9546ec13063d0d5bdf21d30a93d3e8aa6050 Mon Sep 17 00:00:00 2001 From: Bradley Taunt Date: Tue, 2 Jul 2024 14:22:21 -0400 Subject: Rebuild changes based off latest barf --- build/posts/css-slope-graphs/index.html | 243 -------------------------------- 1 file changed, 243 deletions(-) delete mode 100644 build/posts/css-slope-graphs/index.html (limited to 'build/posts/css-slope-graphs') diff --git a/build/posts/css-slope-graphs/index.html b/build/posts/css-slope-graphs/index.html deleted file mode 100644 index 205d544..0000000 --- a/build/posts/css-slope-graphs/index.html +++ /dev/null @@ -1,243 +0,0 @@ - - - - - - - - CSS Slope Graphs - - - - - - - -
-

CSS Slope Graphs

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2021-06-07

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I am a huge sucker for simplistic and beautifully designed visual data on the web. Most data tends to be graphed via line or bar systems - which is fine - but I think slope graphs are highly underrated. Let’s change that, shall we?

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The Demo

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I’m basing this demo off the design patterns found in Edward Tufte’s visualization work, specifically his slope graph designs:

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Live CodePen Example

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The HTML

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For this concept we will actually be building this graph out of tables - crazy, right? The greatest benefit of rendering all the data inside of a table element is the ability to easily support smaller screens and mobile devices. Larger viewports will get to see the pretty slope graph, while those below a certain threshold will view a simple table.

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(But more on that in the CSS section)

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<p>Sales of the leading frozen pizza brands of the United States from 2011 to 2017 (in million US dollars) <br><em>Source: Statisa 2018</em></p>
-<table>
-    <thead>
-        <tr>
-            <th>Pizza Brand</th>
-            <th>2011</th>
-            <th>2017</th>
-        </tr>
-    </thead>
-    <tbody>
-        <tr>
-            <td data-set="677.0">DiGiorno</td>
-            <td><span>677.0</span></td>
-            <td data-name="DiGiorno">1014.6</td>
-        </tr>
-        <tr>
-            <td data-set="294.8">Private Label</td>
-            <td><span>294.8</span></td>
-            <td data-name="Private Label">524.8</td>
-        </tr>
-        <tr>
-            <td data-set="286.1">Red Baron</td>
-            <td><span>286.1</span></td>
-            <td data-name="Red Baron">572.3</td>
-        </tr>
-        <tr>
-            <td data-set="257.9">Tombstone</td>
-            <td><span>257.9</span></td>
-            <td data-name="Tombstone">270.6</td>
-        </tr>
-        <tr>
-            <td data-set="164.5">Totino's Party Pizza</td>
-            <td><span>164.5</span></td>
-            <td data-name="Totino's Party Pizza">347.2</td>
-        </tr>
-    </tbody>
-</table>
-
-

As you can see, nothing too fancy is happpening here. Pay close attention to the data-set and data-name variables though - those will be important for the CSS portion of this design, mainly the rendering of the line elements.

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The CSS

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To avoid overwhelming your brain all-at-once, let’s break the CSS down into bite-sized chunks, starting with the base styling:

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@import url('https://opentype.netlify.com/et-book/index.css');
-* {
-    box-sizing: border-box;
-}
-
-html {
-    height: 100%;
-}
-
-body {
-    background: #fffff8;
-    font-family: "et-book", serif;
-    height: 100%;
-    margin: 0 auto;
-    max-width: 800px;
-    padding: 0 0.5rem;
-}
-
-p {
-    font-size: 18px;
-    margin: 4rem 0 6rem;
-}
-
-table {
-    border-collapse: collapse;
-    text-align: left;
-    width: 100%;
-}
-
-

Pretty basic stuff.

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Now we need to design how our slope graph will look on larger screens / desktops. For this instance, we will target these larger devices with a min-width media query of 800px. The rest of the CSS might look a little confusing but I assure you it is quite simple.

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    -

  1. On larger devices we hide the first thead tr th element with display: none

    2. -

  2. The first and second td elements inside each tbody row need to be set as position: absolute to avoid duplicate content

    3. -

  3. The inner span that we include in our HTML inside the second tbody tr td also needs to be display: none

    4. -

  4. Remember that data-set variable? We now use that for our :before pseudo element for table tbody tr td:nth-of-type(1)

    5. -

  5. Remember that data-name variable? We now use that for our :before pseudo element for table tbody tr td:nth-of-type(3)

    6. -

  6. After that, you can see the simple customization we include to render the angle / position of the slope lines and the corresponding labels

    -

    @media(min-width:800px) { - table { - display: block; - position: relative; - margin-bottom: 25rem; - }

    -
    table thead th {
-    border-bottom: 1px solid lightgrey;
-    font-size: 24px;
-    position: absolute;
-    top: -50px;
-    width: 45%;
-}
-table thead th:nth-child(1){ display: none; }
-table thead th:nth-child(2){ left: 0; }
-table thead th:nth-child(3){ right: 0; text-align: right; }
-
-table tbody tr td:nth-of-type(1),
-table tbody tr td:nth-of-type(2) { position: absolute;}
-
-table tbody tr td:nth-of-type(2) span { display: none; }
-table tbody tr td:nth-of-type(1):before {
-    content: attr(data-set);
-    margin-right: 10px;
-    position: relative;
-}
-
-table tbody tr td:nth-of-type(2) { padding-left: 10px; }
-
-table tbody tr td:nth-of-type(3) {
-    position: absolute;
-    right: 0;
-}
-table tbody tr td:nth-of-type(3):before {
-    content: attr(data-name);
-    margin-right: 10px;
-    position: relative;
-}
-
-/* Custom individual slopes -- Left */
-tbody tr:nth-child(1) td:nth-child(1),
-tbody tr:nth-child(1) td:nth-child(2) { top: 60px; }
-tbody tr:nth-child(2) td:nth-child(1),
-tbody tr:nth-child(2) td:nth-child(2) { top: 140px; }
-tbody tr:nth-child(3) td:nth-child(1),
-tbody tr:nth-child(3) td:nth-child(2) { top: 165px; }
-tbody tr:nth-child(4) td:nth-child(1),
-tbody tr:nth-child(4) td:nth-child(2) { top: 220px; }
-tbody tr:nth-child(5) td:nth-child(1),
-tbody tr:nth-child(5) td:nth-child(2) { top: 270px; }
-
-/* Custom individual slopes -- Right */
-[data-name="DiGiorno"] { top: 0; }
-[data-name="Red Baron"] { top: 65px; }
-[data-name="Private Label"] { top: 100px; }
-[data-name="Tombstone"] { top: 180px; }
-[data-name="Totino's Party Pizza"] { top: 150px; }
-
-/* The custom visual lines */
-tbody tr:after {
-    background: black;
-    content: '';
-    height: 1px;
-    left: 14.5%;
-    position: absolute;
-    width: 70%;
-}
-tbody tr:nth-child(1):after {
-    top: 40px;
-    transform: rotate(-6deg);
-}
-tbody tr:nth-child(2):after {
-    left: 17.5%;
-    top: 130px;
-    transform: rotate(-4deg);
-    width: 65%;
-}
-tbody tr:nth-child(3):after {
-    left: 15%;
-    top: 125px;
-    transform: rotate(-10.25deg);
-    width: 70%;
-}
-tbody tr:nth-child(4):after {
-    left: 16%;
-    top: 210px;
-    transform: rotate(-4deg);
-    width: 68%;
-}
-tbody tr:nth-child(5):after {
-    left: 22%;
-    top: 222px;
-    transform: rotate(-16deg);
-    width: 56%;
-}
-
    -

    }

    7. -
-

All that’s left are some minor styles to make everything look nice on mobile:

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@media(max-width:800px) {
-    p {
-        margin: 2rem 0;
-    }
-    table td, table th {
-        border-bottom: 1px solid grey;
-        padding: 10px;
-    }
-    table td:last-of-type, table th:last-of-type {
-        text-align: right;
-    }
-}
-
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Not the most practical

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This slope graph concept is far from perfect for use in real-world situations. The fact that you need to manually render each point of data yourself makes this implementation quite annoying for more in-depth projects.

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But it was fun to mess around with and create, so who cares!

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