How to create a Matrix display from a list in a model - asp.net-mvc

Question

I have a model that called LinksListWidgetModel that contains an IEnumerable property named Links that contains a list of my website links.
In my Razor view, I have two columns (i.e. one for the grid "col-md-8" and one for another tool "col-md-4". I have a foreach loop that adds each link to the grid tool. I am trying to achieve the following look: Matrix View, however the buttons don't wrap after three, it just continues throughout the width of the page. I am using Bootstrap4.x and flexbox.
I tried following the example in this question: How I can make nice looking matrix of buttons with bootstrap 3?, but that didn't fix the issue either.
Here is my code:
LinksListGrid.cshtml:
#if (Model == null)
{
#Html.Partial("_WidgetNotConfigured") }
else
{
<div class="btn-group btn-matrix" role="group">
#foreach (var link in Model.Links)
{
<div class="linkContainer-gridItem">
<button>
<a class="linkContainer-gridItem-link btn btn-default" href="#link.Url">
#if (!string.IsNullOrEmpty(link.Icon))
{
<div>
<i class="icon #link.Icon"></i>
</div>
}
#link.Label
</a>
</button>
</div>
}
</div>
}
LinkContainer.scss:
.linkContainer {
padding: 1rem;
margin-bottom: 2rem;
position: relative;
background: #fff;
border-radius: 8px;
border: 1px solid #dddfe2;
.linkContainer-title {
color: #fff;
background: $colorBrandDarkBlue;
padding: 1rem;
border-radius: 5px;
margin: -.5rem -.5rem 1rem -.5rem;
font-weight: 400;
}
.linkContainer-list {
list-style: none;
padding: 0;
margin-bottom: 0;
font-family: "Montserrat",sans-serif;
.linkContainer-item {
position: relative;
.linkContainer-link {
display: -webkit-box;
display: -ms-flexbox;
display: flex;
padding: .75rem .5rem;
color: $colorBrandBlue;
font-weight: 400;
font-size: 18px;
-webkit-box-align: center;
-ms-flex-align: center;
align-items: center;
text-decoration: none;
background-color: transparent;
font-family: "Montserrat",sans-serif;
}
.icon:before {
font-size: 30px;
margin-right: 1rem;
}
}
.linkContainer-item:after {
content: '';
position: absolute;
top: 0;
right: 0;
left: 0;
border-top: 1px dotted;
opacity: .25;
}
}
.linkContainer-grid {
width: 290px;
display: block;
margin: 0 auto;
padding: 0;
padding-bottom: 19px;
font-family: "Montserrat",sans-serif;
text-align: center;
.linkContainer-gridItem {
background-color: $colorBrandBlue;
border-radius: 25px;
width: 120px;
height: 120px;
margin: 10px;
display: inline-block;
vertical-align: top;
.linkContainer-gridItem-link {
color: white;
text-decoration: none;
display: flex;
flex-direction: column;
justify-content: center;
height: 100%;
padding: 20px 10px;
}
.icon {
font-size: 30px;
margin-bottom: 0.25rem;
}
}
}
#media screen and (max-width: 767px) {
&.linkContainer-gridLayout {
padding: 0;
}
}
}
.btn-matrix {
> .btn {
&:nth-child(3n+4) {
clear: left;
margin-left: 0;
}
&:nth-child(n+4) {
margin-top: -1px;
}
&:first-child {
border-bottom-left-radius: 0;
}
&:nth-child(3) {
border-top-right-radius: 4px !important;
}
&:nth-last-child(3) {
border-bottom-left-radius: 4px !important;
}
&:last-child {
border-top-right-radius: 0;
}
}
}
It ends up looking like this: Grid View
How can I change this to make it look like the first screenshot's matrix/grid display? After every 3 buttons it goes on the second line.

Answer 1

I don't think clear:left; will work on flexbox. But there are other ways to do it.
HTML & SCSS way
I think you would be better off just styling .btn-matrix yourself, without mixing .btn-group styles, because Bootstrap .btn-group brings in lots of noice on its .btn children, such as border-radius, border, etc. You would need to style them using your own styles anyway so why bother.
I think the following structure should be generic enough you can use to construct a matrix:
<div class="btn-matrix btn-matrix-white" role="group">
<a class="btn" href="#">
<div class="fa-stack fa-2x">
<i class="fas fa-circle fa-stack-2x" />
<i class="fas fa-chart-bar fa-stack-1x" />
</div>
Reports
</a>
...
</div>
First of all, in your original HTML structure, you had a button that wraps an anchor link. That's not necessary because Bootstrap has classes to style an anchor link to just look like a button.
Secondly, I am using icon stacking method to construct icons with circle backgrounds. You can read about it here: https://fontawesome.com/how-to-use/on-the-web/styling/stacking-icons
Finally, here is the styles:
$numOfMatrixItemPerRow: 3;
$matrixItemBorderWidth: 1px;
.btn-matrix {
display: flex;
flex-flow: row wrap;
box-shadow: 0 0 1rem #ccc;
border: 1px solid transparent;
border-radius: .25rem;
> .btn {
display: flex;
flex-flow: column nowrap;
align-items: center;
justify-content: flex-start;
flex-grow: 0;
flex-shrink: 0;
padding: 5%;
width: calc(100% / #{$numOfMatrixItemPerRow});
border-radius: 0;
}
&.btn-matrix-white {
> .btn {
background-color: #fff;
border-right: $matrixItemBorderWidth solid #ddd;
border-bottom: $matrixItemBorderWidth solid #ddd;
.fa-stack-2x {
color: var(--primary);
}
.fa-stack-1x {
color: #fff;
}
&:nth-child(#{$numOfMatrixItemPerRow}n) {
border-right: none !important;
}
&:last-child {
border-bottom: none !important;
}
}
}
}
Really nothing tricky there except you would need to use SASS Interpolation to involve $numOfMatrixItemPerRow variable into calculations:
Display .btn-matrix as a wrappable flex row
Set the width of each button to be 100% / $numOfMatrixItemPerRow so that each row will contain the exact number of items before breaking into new rows
Display .btn as flexbox column so that you can easily align the icons and text there
Set the right and bottom border of each button, with exceptions of the last one on each row and last one
demo: https://jsfiddle.net/davidliang2008/1wqost69/201/
ASP.NET MVC way
Now since you're using ASP.NET MVC, I think there is another approach you can consider. That is, in the loop where you loop though each link from the model, you can define a variable there and do something like:
<div class="btn-matrix">
#for (int i = 0; i < Model.Links.Count(); i++)
{
var link = Model.Links[i];
if (i % numOfItemsPerRow == 0)
{
<div class="row">
}
<div class="col-md-4">
<a class="btn" href="#link.Url">
#if (!string.IsNullOrEmpty(link.Icon))
{
<div>
<i class="icon #link.Icon"></i>
</div>
}
#link.Label
</a>
</div>
if ((i+1) % numOfItemsPerRow == 0 || i + 1 == Model.Links.Count())
{
</div>
}
}
</div>
I'm just making things up but hopefully you see where I am going.