Topic: Suggestion: MaterialSelect isn't sufficient enough for numerous elements
Hello,
I realized with time, that the select component is slowly reaching an amazing level of polish, however, I also realized that the select component isn't terribly well with many items. Even by reducing the padding of each span, it can rarely depict more than four to five options. I circumvented this by creating a Directive that changes the height and max-height of the select component, which is serviceable but not too great. Since the animation of the select works only until the initially considered point on the Y scale and then there is a sudden expansion. On the other hand, using ONLY css wasn't helping, since I wanted to depict as many options as possible depending on the view-port. For the ones curious I'm also adding how I did it; Fair warning, this is a very special case with an fair amount of static items
So my suggestion would be: Perhaps introduce a directive or input parameter for the component that set a size that is serviceable for mobile and/or desktop application that requires many select options.
import { Directive, ElementRef, HostListener, Renderer2 } from '@angular/core';
@Directive({
selector:'[ResizeSelectDropDown]'
})
export class ResizeSelectDropDownDirective {
private selectElementSize=functionoffset(el:Element) {
let rect=el.getBoundingClientRect();
let top=rect.top;
let left=rect.left;
return { top:top, left:left }
}
constructor(public elementRef:ElementRef, public renderer:Renderer2) {
}
@HostListener('click', ['$event'])
public onClick() {
let selectOptions=this.elementRef.nativeElement.querySelector('.options')
let size=this.selectElementSize(this.elementRef.nativeElement);
if (!selectOptions) {
return;
}
let topY=size.top;
let differenceHeight= (window.innerHeight-topY-10);
let height=JSON.stringify(differenceHeight- (differenceHeight*.33));
let maxHeight=JSON.stringify(differenceHeight);
let heightStringPx=height+'px';
let maxHeightStringPx=maxHeight+'px';
this.renderer.setStyle(selectOptions, 'height', heightStringPx)
this.renderer.setStyle(selectOptions, 'max-height', maxHeightStringPx)
}
}
Dear @ak.leimrey
With the next release of MDB Angular it will be possible to set the custom height of Select items with input [optionHeight].
Best Regards,
Damian
Hello,
Could you provide more information about reproduction steps? How can I recreate this problem on my end?
There is an 'visibleOptions' input for mdb-select. You can specify how many items should be visible without displaying the inner scroll bar.
ak.leimrey pro commented 6 years ago
Sorry for the late response.
I'm adding a number value for the output, but nothing appears to happen and I have the current version of MDB that's why I wrote my directive to begin with
Arkadiusz Idzikowski staff commented 6 years ago
Could you provide some code and reproduction steps so I can debug this problem on my end?
ak.leimrey pro commented 6 years ago
I cleared the node folder and I installed MDB again and it fixes the issue. However, something I would like to add, while the input parameter works, it seems to be based on a set value. In cases someone reduces the margins of each item and/or uses smaller fonts, it isn't working too reliably.
Arkadiusz Idzikowski staff commented 6 years ago
We are already aware of that problem and we need to add some inputs to make the customisation of the component easier.
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Answered
- ForumUser: Pro
- Premium support: No
- Technology: MDB Angular
- MDB Version: 7.0.0
- Device: PC
- Browser: Chrome
- OS: Windows
- Provided sample code: Yes
- Provided link: No