Page 5 – Smart UI Components

@hristofor

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December 20, 2019 at 9:32 am in reply to: Scroll Bar Div Usage #100542

Hristofor

Member

Hi ctstrist,
ScrollBar’s change event is fired when the scroll buttons or the scroll thumb is being pressed or dragged accordingly. In order to scroll the content of a container you need to listen to that event and use the value of the ScrollBar to set the scrollTop/scrollLeft of the target container. Here’s a simple example:


<!DOCTYPE html>
<html lang="en">
<head>
<!-- references to JS and CSS -->
    <style>
        #scrollableContainer {
            width: 500px;
            height: 200px;
            border: 1px solid black;
            position: relative;
            overflow: hidden;
        }
        #innerScrollableContainer {
            width: 100%;
        }
    </style>
    <script>
        window.onload = function () {
            let scrollBar = document.getElementById('verticalScrollBar'),
                scrollableContainer = document.getElementById('scrollableContainer'),
                innerScrollableContainer = document.getElementById('innerScrollableContainer');
            scrollBar.max = innerScrollableContainer.offsetHeight - scrollableContainer.offsetHeight;
            scrollBar.addEventListener('change', function (event) {
                scrollableContainer.scrollTop = this.value;
            });
        }
    </script>
</head>
<body>
 <smart-scroll-bar orientation="vertical" id="verticalScrollBar"></smart-scroll-bar>
 <div id="scrollableContainer">
        <div id="innerScrollableContainer">
            What is Lorem Ipsum?
            Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.
            Why do we use it?
            It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using 'Content here, content here', making it look like readable English. Many desktop publishing packages and web page editors now use Lorem Ipsum as their default model text, and a search for 'lorem ipsum' will uncover many web sites still in their infancy. Various versions have evolved over the years, sometimes by accident, sometimes on purpose (injected humour and the like).
            Where does it come from?
            Contrary to popular belief, Lorem Ipsum is not simply random text. It has roots in a piece of classical Latin literature from 45 BC, making it over 2000 years old. Richard McClintock, a Latin professor at Hampden-Sydney College in Virginia, looked up one of the more obscure Latin words, consectetur, from a Lorem Ipsum passage, and going through the cites of the word in classical literature, discovered the undoubtable source. Lorem Ipsum comes from sections 1.10.32 and 1.10.33 of "de Finibus Bonorum et Malorum" (The Extremes of Good and Evil) by Cicero, written in 45 BC. This book is a treatise on the theory of ethics, very popular during the Renaissance. The first line of Lorem Ipsum, "Lorem ipsum dolor sit amet..", comes from a line in section 1.10.32.
            The standard chunk of Lorem Ipsum used since the 1500s is reproduced below for those interested. Sections 1.10.32 and 1.10.33 from "de Finibus Bonorum et Malorum" by Cicero are also reproduced in their exact original form, accompanied by English versions from the 1914 translation by H. Rackham.
        </div>
    </div>
</body>
</html>

There’s should not be any issues/lagg if done properly. Additionaly if you want to add option to scroll using mouse wheel, you will have to listen to the wheel event on the target container and add your custom logic to change the value of the Scrollbar. The event is standart and well documented in the MDN Web Docs.
Best Regards,
Christopher
Smart HTML Elements Team
https://www.htmlelements.com

December 20, 2019 at 8:58 am in reply to: ScrollBar Show-Buttons Attribute is Confusing #100541

Hristofor

Member

Hi ctstrist,
the showButtons property which controls the visibility of the scroll buttons of the scroll bar is by default set to true. The only way to change it to false is to set it dynamically via javascript. However an alternative approach is to change the size of the buttons via the CSS variable and avoid using javascript. Using the --smart-scroll-button-size you can set their size to 1px which is the minimum and the buttons will not be visible, like so:


#myScrollBar {
 --smart-scroll-button-size: 1px;
}

Also there’s an issue with your code snipped:
 <smart-scroll-bar></smart-scroll-bar> by default.
The span tag with class ‘tag’ encloses the opening tag of the ScrollBar but it should not. No content should be added between the opening and closing tags of the Scroll bar. The valid approach would be:
<smart-scroll-bar></smart-scroll-bar> by default
Best Regards,
Christopher
Smart HTML Elements Team
https://www.htmlelements.com

December 20, 2019 at 8:30 am in reply to: Is it possible to style the List Boxe's scrollbar without additional js? #100540

Hristofor

Member

Hi ctstrist,
It’s possible to customize the Scroll Bars inside the Listbox via CSS. Here’s the full CSS API of the element. Here’s an example on how to customize the Scroll bars inside specific List boxes:


 #listbox {
            --smart-scroll-bar-thumb-background-active: #003366;
            --smart-scroll-bar-thumb-background-hover: #336699;
            --smart-scroll-bar-thumb-background: #6699cc;
        }

Best Regards,
Christopher
Smart HTML Elements Team
https://www.htmlelements.com

December 17, 2019 at 4:19 pm in reply to: How to set content Tag into HTML #100536

Hristofor

Member

Hi soumaya,
it is not possible set the content of a LayoutPanelItems inside the HTML tag of the element on initialization. The proper way to set the content is by defining it inside the json or dynamically change it later using the update method documented in the API or use the id of the target item and change it’s innerHTML property to the new content. Here’s an example:
1) Using the update method


const targetLayoutPanel = document.getElementById('#item1');
document.querySelector('smart-docking-layout').update(targetLayoutPanel, { items: [{index: 0, content: 'New Content Here ...' }]});

2) Changing the content directly using innerHTML


const targetLayoutPanelItem = document.getElementById('#item1');
targetLayoutPanelItem.innerHTML = 'New Content Here ...';

Best Regards,
Christopher
Smart HTML Elements Team
https://www.htmlelements.com

December 9, 2019 at 9:20 am in reply to: Drop Down List With On Demand Ajax Calls #100534

Hristofor

Member

Hi ctstrist,
if the dataSource is set to a callback function it will be used only by the filtering logic which will call the callback when the value of filter input inside the drop down is changed to a new value (by default is empty). If not the dataSource function is never called. The ‘query’ argument represents the current filtering query that can be used to filter the dataSource to return a custom list of data. The ‘callback’ argument represents the function that handles the new data and populates the drop down.
Best Regards,
Christopher
Smart HTML Elements Team
https://www.htmlelements.com

December 6, 2019 at 1:28 pm in reply to: Drop Down List With On Demand Ajax Calls #100532

Hristofor

Member

Hi ctstrist,
you can set the dataSource property in your Ajax success function in order to load the new data to the element. The dataSource property can be set at any time with new data.
Also dataSource property accepts a callback function which allows to load custom data according to the filter input. This means that by entering a new value inside the filter field anew dataSource according to it will be loaded. Fitlering can be enabled by setting the filterable property. Here’s an example:


window.onload = function () {
    //Sample data
    const data = [
        { "name": "Afghanistan", "code": "AF" },
        { "name": "land Islands", "code": "AX" },
        { "name": "Antarctica", "code": "AQ" },
        { "name": "Antigua and Barbuda", "code": "AG" },
        { "name": "Argentina", "code": "AR" },
        { "name": "Armenia", "code": "AM" }
    ];
    const dropDownList = document.querySelector('smart-drop-down-list');
    //Setting properties to the element
    dropDownList.filterable = true;
    dropDownList.displayMember = 'name';
    dropDownList.valueMember = 'code';
    dropDownList.dataSource = function (query, callback) {
        let result = [];
        // Creating a new dataSource according to the new input
        for (let d = 0; d < data.length; d++) {
            if (data[d].name.toLowerCase().indexOf(query.toLowerCase()) > -1) {
                result.push(data[d]);
            }
        }
        //The Ajax request goes here
       let xhttp = new XMLHttpRequest();
       xhttp.onreadystatechange = function() {
        if (this.readyState == 4 && this.status == 200) {
             // Call the callback function here with the new result
             callback(result);
           }
       };
       xhttp.open("GET", "filename", true);
       xhttp.send();
    }
}

November 27, 2019 at 3:45 pm in reply to: list menu scroll bars? #100519

Hristofor

Member

Hi edwardsmarkf,
yes we do custom development. You can make an inquiry at sales@htmlelements.com or sales@jqwidgets.com.
Best Regards,
Christopher
Smart HTML Elements Team
https://www.htmlelements.com

November 22, 2019 at 10:21 am in reply to: list menu scroll bars? #100512

Hristofor

Member

Hi edwardsmarkf,
Unfortunately currently it is not possible to use an additional scroll bar. This is a requested feature that we are considering. The scroll buttons are the only available option to scroll up/down through the item list. On Mobile devices it is also possible to scroll using touch actions.
Best Regards,
Christopher
Smart HTML Elements Team
https://www.htmlelements.com

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